Implement multi selection (#2351)

* Modify Selection API to support multi-select via shift click.

* Add support for shift + click to add and remove the selection.

* Display message in Location and Properties for multi-select.

* Define applicableSelectedItems for toolbar items. Move toolbar  control definitions to functions.

* Hide positioning inputs if multi-select. Show a 'non-specific' icon when a discrete setting can't be shown in a mixed setting."

* Add toolbar controls in groups per layout item type. Add nonSpecific property to toolbar items to be used by toolbar controls to show non-specific icon.

* Modify toolbar button to react to nonSpecific flag. Get form value by checking value of applicable selected items.

* Support deleting multiple selected objects.

* Do not disable controls when selected items have mixed setting.

* Revert default color to original value.

* Changes to snap-to-grid

* Remove timeout for updating toolbar after mutation. Do not copy toolbar item when iterating the structure.

* Implement move to top and move to bottom for multi-select

* Implement move up and move down for multi-select.

* Markup and CSS changes for mixed settings in toolbar

- Toggle, color-picker buttons;
- TODO: check other themes and sync;

* Mixed settings styling complete

- Refined and synced theme constants;
- Styling for all toolbar components;
- Text size menu handling;
- Inspector messaging;

* Fix selection path

* Mixed settings styling refinements

- Normalized button styling for mixed style context;
- Better theme constant naming;
- Refined swatch styling, better theme constants;

* First cut at getting the bounding rectangle working for multi-select.

* Set pointer-events to none on c-edit-frame to prevent marquee reacting to click events.

* Delete capturing before calling select.

* Remove EditMarquee from ITEM_TYPE_VIEW_MAP

* Pass selected layout items as a prop to edit marquee instead of selection so that x, y, w, h are updated.

* Multi-select c-frame-edit visual fixes

- WIP

* Add complexContent class for a single selected item whose type is subobject-view.

* Move 'c-frame-edit-move' div to layout frame.

* Saving work - multi-move WIP

* Fixes issue with selection happening at end of drag

* Styles fixed for new markup organization

- Marquee, frame styles;
- $editMarqueeBorder style added to theme constants;

* Significant functionality for .c-frame-edit__move element

- Added .is-multi-selected class to .l-layout when > 1 items selected;
- __move element now handles multi-select and complex content (CC)
objects:
-- 0 to 1 items selected, displays as hover bar with grippy on all CC
 objects,
-- > 1 items selected, __move covers all of the frame of all selected CC
items and doesn't allow sub-object selection, and only displays as hover
bar on non-selected CC objects;
- Added better styling for selected objects while editing;
- Code cleanup and consolidation;
- Left translucent green style applied to __move element to temporarily
aid development;
- TODO: fix line drawing object;

* - Fix an issue where shift click did not remove the selected item from the selection after move.
- Modify telemetry and subobject views to emit move and endMove events.
- Clone selectedLayoutItems to get initial positions instead of selection so subsequent moves start from the current position.

* Fix cursor for __move, code comment refinements

* Code cleanup, line view markup changes

- line view markup brought into line with structure in LayoutFrame.vue;

* Implement multi-resize

* Simplify edit marquee code. Revert image and text views' default position to the original values.

* Fix resize for single selection when snap to grid is disabled

* Hide edit marquee if single line is selected, and show c-frame-edit in line-view instead.

* Fix for LineView handles

* Remove snap to grid toggle button and modify the migration script to convert elements with pixel coordinates to grid.

* Fix resizing single line

* Calculate width and height differently for line to position marquee correctly.

* Fix moving single selected line

* Calculate the height and width for line before comparing them with max height and width to correct the marquee position.

* Change the logic for showing frame edit for lines to check for item id.

* Allow multi-move with line in the mix.

* Implement multi-resize when grabbing SW corner.

* Removed temp green tint from __move element

* Fix object undefined error.

* Implement multi-resize for all items except line (take 2).

* Misc UI 7

- CSS selectors to properly display edit marquee, don't show in browse
mode;

* Fix multi-resize for lines.
Make sure line's height and width is minimum 1.

* Disable inspector views when multiple objects are selected.

* Restored layout grid display on sub-layout selection

* Clean up code

* Fixes

- Edit marquee display fixes;

* More code clean up

* SIGNIFICANT fixes and rewriting in LayoutFrame.vue

- Styles for .c-frame-edit__move element for selection and hovering;
- local controls;
- view large button;
- Theme constants updated;

* Get selected item's index from layoutItems.

* Address review feedback.

* Merge topic-core-refactor

* Reset keyString to empty string after setting original path when domainObject is undefined.
Add proper check for selection.

src/adapter/views/TypeInspectorViewProvider.js

@@ -25,14 +25,20 @@ define([
             cssClass: representation.cssClass,
             description: representation.description,
             canView: function (selection) {
-                if (!selection[0] || !selection[0].context.item) {
+                if (selection.length === 0 || selection[0].length === 0) {
                     return false;
                 }
-                let domainObject = selection[0].context.item;
+
-                return domainObject.type === typeDefinition.key;
+                let selectionContext = selection[0][0].context;
+
+                if (!selectionContext.item) {
+                    return false;
+                }
+
+                return selectionContext.item.type === typeDefinition.key;
             },
             view: function (selection) {
-                let domainObject = selection[0].context.item;
+                let domainObject = selection[0][0].context.item;
                 let $rootScope = openmct.$injector.get('$rootScope');
                 let templateLinker = openmct.$injector.get('templateLinker');
                 let scope = $rootScope.$new();

src/plugins/displayLayout/DisplayLayoutToolbar.js

@@ -28,11 +28,17 @@ define([], function () {
             key: "layout",
             description: "A toolbar for objects inside a display layout.",
             forSelection: function (selection) {
-                // Apply the layout toolbar if the selected object
+                if (!selection || selection.length === 0) {
-                // is inside a layout, or the main layout is selected.
+                    return false;
-                return (selection &&
+                }
-                    ((selection[1] && selection[1].context.item && selection[1].context.item.type === 'layout') ||
+
-                        (selection[0].context.item && selection[0].context.item.type === 'layout')));
+                let selectionPath = selection[0];
+                let selectedObject = selectionPath[0];
+                let selectedParent = selectionPath[1];
+
+                // Apply the layout toolbar if the selected object is inside a layout, or the main layout is selected.
+                return (selectedParent && selectedParent.context.item && selectedParent.context.item.type === 'layout') ||
+                    (selectedObject.context.item && selectedObject.context.item.type === 'layout');
             },
             toolbar: function (selection) {
                 const DIALOG_FORM = {
@@ -73,27 +79,36 @@ define([], function () {
                     return openmct.$injector.get('dialogService').getUserInput(form, {});
                 }
 
-                function getPath() {
+                function getPath(selectionPath) {
-                    return `configuration.items[${selection[0].context.index}]`;
+                    return `configuration.items[${selectionPath[0].context.index}]`;
                 }
 
-                let selectedParent = selection[1] && selection[1].context.item,
+                function getAllTypes(selection) {
-                    selectedObject = selection[0].context.item,
+                    return selection.filter(selectionPath => {
-                    layoutItem = selection[0].context.layoutItem,
+                        let type = selectionPath[0].context.layoutItem.type;
-                    toolbar = [];
+                        return type === 'text-view' ||
+                            type === 'telemetry-view' ||
+                            type === 'box-view' ||
+                            type === 'image-view' ||
+                            type === 'line-view' ||
+                            type === 'subobject-view';
+                    });
+                }
 
-                if (selectedObject && selectedObject.type === 'layout') {
+                function getAddButton(selection, selectionPath) {
-                    toolbar.push({
+                    if (selection.length === 1) {
+                        selectionPath = selectionPath || selection[0];
+                        return {
                             control: "menu",
-                        domainObject: selectedObject,
+                            domainObject: selectionPath[0].context.item,
                             method: function (option) {
                                 let name = option.name.toLowerCase();
                                 let form = DIALOG_FORM[name];
                                 if (form) {
                                     getUserInput(form)
-                                    .then(element => selection[0].context.addElement(name, element));
+                                        .then(element => selectionPath[0].context.addElement(name, element));
                                 } else {
-                                selection[0].context.addElement(name);
+                                    selectionPath[0].context.addElement(name);
                                 }
                             },
                             key: "add",
@@ -117,23 +132,43 @@ define([], function () {
                                     "class": "icon-image"
                                 }
                             ]
-                    });
-                }
-
-                if (!layoutItem) {
-                    return toolbar;
-                }
-
-                let separator = {
-                    control: "separator"
                         };
-                let remove = {
+                    }
+                }
+
+                function getToggleFrameButton(selectedParent, selection) {
+                    return {
+                        control: "toggle-button",
+                        domainObject: selectedParent,
+                        applicableSelectedItems: selection.filter(selectionPath => 
+                            selectionPath[0].context.layoutItem.type === 'subobject-view'
+                        ),
+                        property: function (selectionPath) {
+                            return getPath(selectionPath) + ".hasFrame";
+                        },
+                        options: [
+                            {
+                                value: false,
+                                icon: 'icon-frame-show',
+                                title: "Frame visible"
+                            },
+                            {
+                                value: true,
+                                icon: 'icon-frame-hide',
+                                title: "Frame hidden"
+                            }
+                        ]
+                    };
+                }
+
+                function getRemoveButton(selectedParent, selectionPath, selection) {
+                    return {
                         control: "button",
                         domainObject: selectedParent,
                         icon: "icon-trash",
                         title: "Delete the selected object",
                         method: function () {
-                        let removeItem = selection[1].context.removeItem;
+                            let removeItem = selectionPath[1].context.removeItem;
                             let prompt = openmct.overlays.dialog({
                                 iconClass: 'alert',
                                 message: `Warning! This action will remove this item from the Display Layout. Do you want to continue?`,
@@ -142,7 +177,7 @@ define([], function () {
                                         label: 'Ok',
                                         emphasis: 'true',
                                         callback: function () {
-                                        removeItem(layoutItem, selection[0].context.index);
+                                            removeItem(getAllTypes(selection));
                                             prompt.dismiss();
                                         }
                                     },
@@ -156,7 +191,10 @@ define([], function () {
                             });
                         }
                     };
-                let stackOrder = {
+                }
+
+                function getStackOrder(selectedParent, selectionPath) {
+                    return {
                         control: "menu",
                         domainObject: selectedParent,
                         icon: "icon-layers",
@@ -184,138 +222,122 @@ define([], function () {
                             }
                         ],
                         method: function (option) {
-                        selection[1].context.orderItem(option.value, selection[0].context.index);
+                            selectionPath[1].context.orderItem(option.value, getAllTypes(selection));
                         }
                     };
-                let useGrid = {
-                    control: "toggle-button",
-                    domainObject: selectedParent,
-                    property: function () {
-                        return getPath() + ".useGrid";
-                    },
-                    options: [
-                        {
-                            value: false,
-                            icon: "icon-grid-snap-to",
-                            title: "Grid snapping enabled"
-                        },
-                        {
-                            value: true,
-                            icon: "icon-grid-snap-no",
-                            title: "Grid snapping disabled"
                 }
-                    ]
+
-                };
+                function getXInput(selectedParent, selection) {
-                let x = {
+                    if (selection.length === 1) {
+                        return {
                             control: "input",
                             type: "number",
                             domainObject: selectedParent,
-                    property: function () {
+                            applicableSelectedItems: getAllTypes(selection),
-                        return getPath() + ".x";
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".x";
                             },
                             label: "X:",
                             title: "X position"
-                },
+                        };
-                y = {
+                    }
+                }
+
+                function getYInput(selectedParent, selection) {
+                    if (selection.length === 1) {
+                        return {
                             control: "input",
                             type: "number",
                             domainObject: selectedParent,
-                    property: function () {
+                            applicableSelectedItems: getAllTypes(selection),
-                        return getPath() + ".y";
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".y";
                             },
                             label: "Y:",
                             title: "Y position",
-                },
+                        };
-                width = {
+                    }
+                }
+
+                function getWidthInput(selectedParent, selection) {
+                    if (selection.length === 1) {
+                        return {
                             control: 'input',
                             type: 'number',
                             domainObject: selectedParent,
-                    property: function () {
+                            applicableSelectedItems: getAllTypes(selection),
-                        return getPath() + ".width";
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".width";
                             },
                             label: 'W:',
                             title: 'Resize object width'
-                },
+                        };
-                height = {
+                    }
+                }
+
+                function getHeightInput(selectedParent, selection) {
+                    if (selection.length === 1) {
+                        return {
                             control: 'input',
                             type: 'number',
                             domainObject: selectedParent,
-                    property: function () {
+                            applicableSelectedItems: getAllTypes(selection),
-                        return getPath() + ".height";
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".height";
                             },
                             label: 'H:',
                             title: 'Resize object height'
                         };
-
+                    }
-                if (layoutItem.type === 'subobject-view') {
-                    if (toolbar.length > 0) {
-                        toolbar.push(separator);
                 }
 
-                    toolbar.push({
+                function getX2Input(selectedParent, selection) {
-                        control: "toggle-button",
+                    if (selection.length === 1) {
+                        return {
+                            control: "input",
+                            type: "number",
                             domainObject: selectedParent,
-                        property: function () {
+                            applicableSelectedItems: selection.filter(selectionPath => {
-                            return getPath() + ".hasFrame";
+                                return selectionPath[0].context.layoutItem.type === 'line-view';
+                            }),
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".x2";
                             },
-                        options: [
+                            label: "X2:",
-                            {
+                            title: "X2 position"
-                                value: false,
+                        };
-                                icon: 'icon-frame-show',
-                                title: "Frame visible"
-                            },
-                            {
-                                value: true,
-                                icon: 'icon-frame-hide',
-                                title: "Frame hidden"
                     }
-                        ]
+                }
-                    });
+
-                    toolbar.push(separator);
+                function getY2Input(selectedParent, selection) {
-                    toolbar.push(stackOrder);
+                    if (selection.length === 1) {
-                    toolbar.push(x);
+                        return {
-                    toolbar.push(y);
+                            control: "input",
-                    toolbar.push(width);
+                            type: "number",
-                    toolbar.push(height);
+                            domainObject: selectedParent,
-                    toolbar.push(useGrid);
+                            applicableSelectedItems: selection.filter(selectionPath => {
-                    toolbar.push(separator);
+                                return selectionPath[0].context.layoutItem.type === 'line-view';
-                    toolbar.push(remove);
+                            }),
-                } else {
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".y2";
+                            },
+                            label: "Y2:",
+                            title: "Y2 position",
+                        };
+                    }
+                }
+
+                function getTextSizeMenu(selectedParent, selection) {
                     const TEXT_SIZE = [8, 9, 10, 11, 12, 13, 14, 15, 16, 20, 24, 30, 36, 48, 72, 96, 128];
-                    let fill = {
+                    return {
-                        control: "color-picker",
-                        domainObject: selectedParent,
-                        property: function () {
-                            return getPath() + ".fill";
-                        },
-                        icon: "icon-paint-bucket",
-                        title: "Set fill color"
-                    },
-                    stroke = {
-                        control: "color-picker",
-                        domainObject: selectedParent,
-                        property: function () {
-                            return getPath() + ".stroke";
-                        },
-                        icon: "icon-line-horz",
-                        title: "Set border color"
-                    },
-                    color = {
-                        control: "color-picker",
-                        domainObject: selectedParent,
-                        property: function () {
-                            return getPath() + ".color";
-                        },
-                        icon: "icon-font",
-                        mandatory: true,
-                        title: "Set text color",
-                        preventNone: true
-                    },
-                    size = {
                         control: "select-menu",
                         domainObject: selectedParent,
-                        property: function () {
+                        applicableSelectedItems: selection.filter(selectionPath => {
-                            return getPath() + ".size";
+                            let type = selectionPath[0].context.layoutItem.type;
+                            return type === 'text-view' || type === 'telemetry-view';
+                        }),
+                        property: function (selectionPath) {
+                            return getPath(selectionPath) + ".size";
                         },
                         title: "Set text size",
                         options: TEXT_SIZE.map(size => {
@@ -324,13 +346,128 @@ define([], function () {
                             };
                         })
                     };
+                }
 
-                    if (layoutItem.type === 'telemetry-view') {
+                function getFillMenu(selectedParent, selection) {
-                        let displayMode = {
+                    return {
+                        control: "color-picker",
+                        domainObject: selectedParent,
+                        applicableSelectedItems: selection.filter(selectionPath => {
+                            let type = selectionPath[0].context.layoutItem.type;
+                            return type === 'text-view' ||
+                                type === 'telemetry-view' ||
+                                type === 'box-view';
+                        }),
+                        property: function (selectionPath) {
+                            return getPath(selectionPath) + ".fill";
+                        },
+                        icon: "icon-paint-bucket",
+                        title: "Set fill color"
+                    };
+                }
+
+                function getStrokeMenu(selectedParent, selection) {
+                    return {
+                        control: "color-picker",
+                        domainObject: selectedParent,
+                        applicableSelectedItems: selection.filter(selectionPath => {
+                            let type = selectionPath[0].context.layoutItem.type;
+                            return type === 'text-view' ||
+                                type === 'telemetry-view' ||
+                                type === 'box-view' ||
+                                type === 'image-view' ||
+                                type === 'line-view';
+                        }),
+                        property: function (selectionPath) {
+                            return getPath(selectionPath) + ".stroke";
+                        },
+                        icon: "icon-line-horz",
+                        title: "Set border color"
+                    };
+                }
+
+                function getTextColorMenu(selectedParent, selection) {
+                    return {
+                        control: "color-picker",
+                        domainObject: selectedParent,
+                        applicableSelectedItems: selection.filter(selectionPath => {
+                            let type = selectionPath[0].context.layoutItem.type;
+                            return type === 'text-view' || type === 'telemetry-view';
+                        }),
+                        property: function (selectionPath) {
+                            return getPath(selectionPath) + ".color";
+                        },
+                        icon: "icon-font",
+                        mandatory: true,
+                        title: "Set text color",
+                        preventNone: true
+                    };
+                }
+
+                function getURLButton(selectedParent, selection) {
+                    return {
+                        control: "button",
+                        domainObject: selectedParent,
+                        applicableSelectedItems: selection.filter(selectionPath => {
+                            return selectionPath[0].context.layoutItem.type === 'image-view';
+                        }),
+                        property: function (selectionPath) {
+                            return getPath(selectionPath);
+                        },
+                        icon: "icon-image",
+                        title: "Edit image properties",
+                        dialog: DIALOG_FORM['image']
+                    };
+                }
+
+                function getTextButton(selectedParent, selection) {
+                        return {
+                            control: "button",
+                            domainObject: selectedParent,
+                            applicableSelectedItems: selection.filter(selectionPath => {
+                                return selectionPath[0].context.layoutItem.type === 'text-view';
+                            }),
+                            property: function (selectionPath) {
+                                return getPath(selectionPath);
+                            },
+                            icon: "icon-gear",
+                            title: "Edit text properties",
+                            dialog: DIALOG_FORM['text']
+                        };
+                }
+
+                function getTelemetryValueMenu(selectionPath, selection) {
+                    if (selection.length === 1) {
+                        return {
+                            control: "select-menu",
+                            domainObject: selectionPath[1].context.item,
+                            applicableSelectedItems: selection.filter(selectionPath => {
+                                return selectionPath[0].context.layoutItem.type === 'telemetry-view';
+                            }),
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".value";
+                            },
+                            title: "Set value",
+                            options: openmct.telemetry.getMetadata(selectionPath[0].context.item).values().map(value => {
+                                return {
+                                    name: value.name,
+                                    value: value.key
+                                }
+                            })
+                        };
+                    }
+                }
+
+                function getDisplayModeMenu(selectedParent, selection) {
+                    if (selection.length === 1) {
+                        return {
                             control: "select-menu",
                             domainObject: selectedParent,
-                            property: function () {
+                            applicableSelectedItems: selection.filter(selectionPath => {
-                                return getPath() + ".displayMode";
+                                return selectionPath[0].context.layoutItem.type === 'telemetry-view';
+                            }),
+                            property: function (selectionPath) {
+                                return getPath(selectionPath) + ".displayMode";
                             },
                             title: "Set display mode",
                             options: [
@@ -347,146 +484,196 @@ define([], function () {
                                     value: "value"
                                 }
                             ]
-                        },
-                        value = {
-                            control: "select-menu",
-                            domainObject: selectedParent,
-                            property: function () {
-                                return getPath() + ".value";
-                            },
-                            title: "Set value",
-                            options: openmct.telemetry.getMetadata(selectedObject).values().map(value => {
-                                return {
-                                    name: value.name,
-                                    value: value.key
-                                }
-                            })
                         };
-                        toolbar = [
-                            displayMode,
-                            separator,
-                            value,
-                            separator,
-                            fill,
-                            stroke,
-                            color,
-                            separator,
-                            size,
-                            separator,
-                            stackOrder,
-                            x,
-                            y,
-                            height,
-                            width,
-                            useGrid,
-                            separator,
-                            remove
-                        ];
-                    } else if (layoutItem.type === 'text-view') {
-                        let text = {
-                            control: "button",
-                            domainObject: selectedParent,
-                            property: function () {
-                                return getPath();
-                            },
-                            icon: "icon-gear",
-                            title: "Edit text properties",
-                            dialog: DIALOG_FORM['text']
-                        };
-                        toolbar = [
-                            fill,
-                            stroke,
-                            separator,
-                            color,
-                            size,
-                            separator,
-                            stackOrder,
-                            x,
-                            y,
-                            height,
-                            width,
-                            useGrid,
-                            separator,
-                            text,
-                            separator,
-                            remove
-                        ];
-                    } else if (layoutItem.type === 'box-view') {
-                        toolbar = [
-                            fill,
-                            stroke,
-                            separator,
-                            stackOrder,
-                            x,
-                            y,
-                            height,
-                            width,
-                            useGrid,
-                            separator,
-                            remove
-                        ];
-                    } else if (layoutItem.type === 'image-view') {
-                        let url = {
-                            control: "button",
-                            domainObject: selectedParent,
-                            property: function () {
-                                return getPath();
-                            },
-                            icon: "icon-image",
-                            title: "Edit image properties",
-                            dialog: DIALOG_FORM['image']
-                        };
-                        toolbar = [
-                            stroke,
-                            separator,
-                            stackOrder,
-                            x,
-                            y,
-                            height,
-                            width,
-                            useGrid,
-                            separator,
-                            url,
-                            separator,
-                            remove
-                        ];
-                    } else if (layoutItem.type === 'line-view') {
-                        let x2 = {
-                            control: "input",
-                            type: "number",
-                            domainObject: selectedParent,
-                            property: function () {
-                                return getPath() + ".x2";
-                            },
-                            label: "X2:",
-                            title: "X2 position"
-                        },
-                        y2 = {
-                            control: "input",
-                            type: "number",
-                            domainObject: selectedParent,
-                            property: function () {
-                                return getPath() + ".y2";
-                            },
-                            label: "Y2:",
-                            title: "Y2 position",
-                        };
-                        toolbar = [
-                            stroke,
-                            separator,
-                            stackOrder,
-                            x,
-                            y,
-                            x2,
-                            y2,
-                            useGrid,
-                            separator,
-                            remove
-                        ];
                     }
                 }
 
-                return toolbar;
+                function getSeparator() {
+                    return {
+                        control: "separator"
+                    };
+                }
+
+                function isMainLayoutSelected(selectionPath) {
+                    let selectedObject = selectionPath[0].context.item;
+                    return selectedObject && selectedObject.type === 'layout' &&
+                        !selectionPath[0].context.layoutItem;
+                }
+
+                if (isMainLayoutSelected(selection[0])) {
+                    return [getAddButton(selection)];
+                }
+
+                let toolbar = {
+                    'add-menu': [],
+                    'toggle-frame': [],
+                    'display-mode': [],
+                    'telemetry-value': [],
+                    'style': [],
+                    'text-style': [],
+                    'position': [],
+                    'text': [],
+                    'url': [],
+                    'remove': [],
+                };
+
+                selection.forEach(selectionPath => {
+                    let selectedParent = selectionPath[1].context.item;
+                    let layoutItem = selectionPath[0].context.layoutItem;
+
+                    if (layoutItem.type === 'subobject-view') {
+                        if (toolbar['add-menu'].length === 0 && selectionPath[0].context.item.type === 'layout') {
+                            toolbar['add-menu'] = [getAddButton(selection, selectionPath)];
+                        }
+                        if (toolbar['toggle-frame'].length === 0) {
+                            toolbar['toggle-frame'] = [getToggleFrameButton(selectedParent, selection)];
+                        }
+                        if (toolbar['position'].length === 0) {
+                            toolbar['position'] = [
+                                getStackOrder(selectedParent, selectionPath),
+                                getXInput(selectedParent, selection),
+                                getYInput(selectedParent, selection),
+                                getHeightInput(selectedParent, selection),
+                                getWidthInput(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['remove'].length === 0) {
+                            toolbar['remove'] = [getRemoveButton(selectedParent, selectionPath, selection)];
+                        }
+                    } else if (layoutItem.type === 'telemetry-view') {
+                        if (toolbar['display-mode'].length === 0) {
+                            toolbar['display-mode'] = [getDisplayModeMenu(selectedParent, selection)];
+                        }
+                        if (toolbar['telemetry-value'].length === 0) {
+                            toolbar['telemetry-value'] = [getTelemetryValueMenu(selectionPath, selection)];
+                        }
+                        if (toolbar['style'].length < 2) {
+                            toolbar['style'] = [
+                                getFillMenu(selectedParent, selection),
+                                getStrokeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['text-style'].length === 0) {
+                            toolbar['text-style'] = [
+                                getTextColorMenu(selectedParent, selection),
+                                getTextSizeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['position'].length === 0) {
+                            toolbar['position'] = [
+                                getStackOrder(selectedParent, selectionPath),
+                                getXInput(selectedParent, selection),
+                                getYInput(selectedParent, selection),
+                                getHeightInput(selectedParent, selection),
+                                getWidthInput(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['remove'].length === 0) {
+                            toolbar['remove'] = [getRemoveButton(selectedParent, selectionPath, selection)];
+                        }
+                    } else if (layoutItem.type === 'text-view') {
+                        if (toolbar['style'].length < 2) {
+                            toolbar['style'] = [
+                                getFillMenu(selectedParent, selection),
+                                getStrokeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['text-style'].length === 0) {
+                            toolbar['text-style'] = [
+                                getTextColorMenu(selectedParent, selection),
+                                getTextSizeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['position'].length === 0) {
+                            toolbar['position'] = [
+                                getStackOrder(selectedParent, selectionPath),
+                                getXInput(selectedParent, selection),
+                                getYInput(selectedParent, selection),
+                                getHeightInput(selectedParent, selection),
+                                getWidthInput(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['text'].length === 0) {
+                            toolbar['text'] = [getTextButton(selectedParent, selection)];
+                        }
+                        if (toolbar['remove'].length === 0) {
+                            toolbar['remove'] = [getRemoveButton(selectedParent, selectionPath, selection)];
+                        }
+                    } else if (layoutItem.type === 'box-view') {
+                        if (toolbar['style'].length < 2) {
+                            toolbar['style'] = [
+                                getFillMenu(selectedParent, selection),
+                                getStrokeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['position'].length === 0) {
+                            toolbar['position'] = [
+                                getStackOrder(selectedParent, selectionPath),
+                                getXInput(selectedParent, selection),
+                                getYInput(selectedParent, selection),
+                                getHeightInput(selectedParent, selection),
+                                getWidthInput(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['remove'].length === 0) {
+                            toolbar['remove'] = [getRemoveButton(selectedParent, selectionPath, selection)];
+                        }
+                    } else if (layoutItem.type === 'image-view') {
+                        if (toolbar['style'].length === 0) {
+                            toolbar['style'] = [
+                                getStrokeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['position'].length === 0) {
+                            toolbar['position'] = [
+                                getStackOrder(selectedParent, selectionPath),
+                                getXInput(selectedParent, selection),
+                                getYInput(selectedParent, selection),
+                                getHeightInput(selectedParent, selection),
+                                getWidthInput(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['url'].length === 0) {
+                            toolbar['url'] = [getURLButton(selectedParent, selection)];
+                        }
+                        if (toolbar['remove'].length === 0) {
+                            toolbar['remove'] = [getRemoveButton(selectedParent, selectionPath, selection)];
+                        }
+                    } else if (layoutItem.type === 'line-view') {
+                        if (toolbar['style'].length === 0) {
+                            toolbar['style'] = [
+                                getStrokeMenu(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['position'].length === 0) {
+                            toolbar['position'] = [
+                                getStackOrder(selectedParent, selectionPath),
+                                getXInput(selectedParent, selection),
+                                getYInput(selectedParent, selection),
+                                getX2Input(selectedParent, selection),
+                                getY2Input(selectedParent, selection)
+                            ];
+                        }
+                        if (toolbar['remove'].length === 0) {
+                            toolbar['remove'] = [getRemoveButton(selectedParent, selectionPath, selection)];
+                        }
+                    }
+                });
+
+                let toolbarArray = Object.values(toolbar);
+                return _.flatten(toolbarArray.reduce((accumulator, group, index) => {
+                    group = group.filter(control => control !== undefined);
+
+                    if (group.length > 0) {
+                        accumulator.push(group);
+
+                        if (index < toolbarArray.length - 1) {
+                            accumulator.push(getSeparator());
+                        }
+                    }
+
+                    return accumulator;
+                }, []));
             }
         }
     }

src/plugins/displayLayout/LayoutDrag.js

@@ -95,7 +95,7 @@ define(
          * @param {number[]} pixelDelta the offset from the
          *        original position, in pixels
          */
-        LayoutDrag.prototype.getAdjustedPosition = function (pixelDelta) {
+        LayoutDrag.prototype.getAdjustedPositionAndDimensions = function (pixelDelta) {
             var gridDelta = toGridDelta(this.gridSize, pixelDelta);
             return {
                 position: max(add(
@@ -109,6 +109,16 @@ define(
             };
         };
 
+        LayoutDrag.prototype.getAdjustedPosition = function (pixelDelta) {
+            var gridDelta = toGridDelta(this.gridSize, pixelDelta);
+            return {
+                position: max(add(
+                    this.rawPosition.position,
+                    multiply(gridDelta, this.posFactor)
+                ), [0, 0])
+            };
+        };
+
         return LayoutDrag;
 
     }

src/plugins/displayLayout/components/BoxView.vue

@@ -23,7 +23,8 @@
 <template>
     <layout-frame :item="item"
                   :grid-size="gridSize"
-                  @endDrag="(item, updates) => $emit('endDrag', item, updates)">
+                  @move="(gridDelta) => $emit('move', gridDelta)"
+                  @endMove="() => $emit('endMove')">
         <div class="c-box-view"
              :style="style">
         </div>
@@ -54,8 +55,7 @@
                 x: 1,
                 y: 1,
                 width: 10, 
-                height: 5,
+                height: 5
-                useGrid: true
             };
         },
         inject: ['openmct'],

src/plugins/displayLayout/components/DisplayLayout.vue

@@ -23,8 +23,11 @@
 <template>
     <div class="l-layout"
          @dragover="handleDragOver"
-         @click="bypassSelection"
+         @click.capture="bypassSelection"
-         @drop="handleDrop">
+         @drop="handleDrop"
+         :class="{
+            'is-multi-selected': selectedLayoutItems.length > 1
+            }">
         <!-- Background grid -->
         <div class="l-layout__grid-holder c-grid">
             <div class="c-grid__x l-grid l-grid-x"
@@ -39,18 +42,38 @@
                    :is="item.type"
                    :item="item"
                    :key="item.id"
-                   :gridSize="item.useGrid ? gridSize : [1, 1]"
+                   :gridSize="gridSize"
                    :initSelect="initSelectIndex === index"
                    :index="index"
-                   @endDrag="endDrag"
+                   :multiSelect="selectedLayoutItems.length > 1"
-        >
+                   @move="move"
+                   @endMove="endMove"
+                   @endLineResize='endLineResize'>
         </component>
+        <edit-marquee v-if='showMarquee'
+                      :gridSize="gridSize"
+                      :selectedLayoutItems="selectedLayoutItems"
+                      @endResize="endResize">
+        </edit-marquee>
     </div>
 </template>
 
 <style lang="scss">
     @import "~styles/sass-base";
 
+    @mixin displayMarquee($c) {
+        > .c-frame-edit {
+            // All other frames
+            //@include test($c, 0.4);
+            display: block;
+        }
+        > .c-frame > .c-frame-edit {
+            // Line object frame
+            //@include test($c, 0.4);
+            display: block;
+        }
+    }
+
     .l-layout {
         @include abs();
         display: flex;
@@ -70,7 +93,7 @@
         .l-shell__main-container {
             &[s-selected],
             &[s-selected-parent] {
-                // Display grid in main layout holder when editing
+                // Display grid and allow edit marquee to display in main layout holder when editing
                 > .l-layout {
                     background: $editUIGridColorBg;
 
@@ -84,7 +107,7 @@
         .l-layout__frame {
             &[s-selected],
             &[s-selected-parent] {
-                // Display grid in nested layouts when editing
+                // Display grid and allow edit marquee to display in nested layouts when editing
                 > * > * > .l-layout {
                     background: $editUIGridColorBg;
                     box-shadow: inset $editUIGridColorFg 0 0 2px 1px;
@@ -95,10 +118,21 @@
                 }
             }
         }
+
+        /*********************** EDIT MARQUEE CONTROL */
+        *[s-selected-parent] {
+            > .l-layout {
+                // When main shell layout is the parent
+                @include displayMarquee(deeppink);
+            }
+            > * > * > * {
+                // When a sub-layout is the parent
+                @include displayMarquee(blue);
+            }
+        }
     }
 </style>
 
-
 <script>
     import uuid from 'uuid';
 
@@ -108,6 +142,7 @@
     import TextView from './TextView.vue'
     import LineView from './LineView.vue'
     import ImageView from './ImageView.vue'
+    import EditMarquee from './EditMarquee.vue'
 
     const ITEM_TYPE_VIEW_MAP = {
         'subobject-view': SubobjectView,
@@ -123,9 +158,11 @@
         down: -1,
         bottom: Number.NEGATIVE_INFINITY
     };
-
     const DRAG_OBJECT_TRANSFER_PREFIX = 'openmct/domain-object/';
 
+    let components = ITEM_TYPE_VIEW_MAP;
+    components['edit-marquee'] = EditMarquee;
+
     function getItemDefinition(itemType, ...options) {
         let itemView = ITEM_TYPE_VIEW_MAP[itemType];
 
@@ -141,7 +178,8 @@
             let domainObject = JSON.parse(JSON.stringify(this.domainObject));
             return {
                 internalDomainObject: domainObject,
-                initSelectIndex: undefined
+                initSelectIndex: undefined,
+                selection: []
             };
         },
         computed: {
@@ -150,82 +188,115 @@
             },
             layoutItems() {
                 return this.internalDomainObject.configuration.items;
+            },
+            selectedLayoutItems() {
+                return this.layoutItems.filter(item => {
+                    return this.itemIsInCurrentSelection(item);
+                });
+            },
+            showMarquee() {
+                let selectionPath = this.selection[0];
+                let singleSelectedLine = this.selection.length === 1 &&
+                    selectionPath[0].context.layoutItem && selectionPath[0].context.layoutItem.type === 'line-view';
+                return selectionPath && selectionPath.length > 1 && !singleSelectedLine;
             }
         },
         inject: ['openmct', 'options'],
         props: ['domainObject'],
-        components: ITEM_TYPE_VIEW_MAP,
+        components: components,
         methods: {
             addElement(itemType, element) {
                 this.addItem(itemType + '-view', element);
             },
             setSelection(selection) {
-                if (selection.length === 0) {
+                this.selection = selection;
-                    return;
-                }
-
-                if (this.removeSelectionListener) {
-                    this.removeSelectionListener();
-                }
-
-                let itemIndex = selection[0].context.index;
-
-                if (itemIndex !== undefined) {
-                    this.attachSelectionListener(itemIndex);
-                }
             },
-            attachSelectionListener(index) {
+            itemIsInCurrentSelection(item) {
-                let path = `configuration.items[${index}].useGrid`;
+                return this.selection.some(selectionPath =>
-                this.removeSelectionListener = this.openmct.objects.observe(this.internalDomainObject, path, function (value) {
+                    selectionPath[0].context.layoutItem && selectionPath[0].context.layoutItem.id === item.id);
-                    let item = this.layoutItems[index];
-
-                    if (value) {
-                        item.x = Math.round(item.x / this.gridSize[0]);
-                        item.y = Math.round(item.y / this.gridSize[1]);
-                        item.width = Math.round(item.width / this.gridSize[0]);
-                        item.height = Math.round(item.height / this.gridSize[1]);
-
-                        if (item.x2) {
-                            item.x2 = Math.round(item.x2 / this.gridSize[0]);
-                        }
-                        if (item.y2) {
-                            item.y2 = Math.round(item.y2 / this.gridSize[1]);
-                        }
-                    } else {
-                        item.x = this.gridSize[0] * item.x;
-                        item.y = this.gridSize[1] * item.y;
-                        item.width = this.gridSize[0] * item.width;
-                        item.height = this.gridSize[1] * item.height;
-
-                        if (item.x2) {
-                            item.x2 = this.gridSize[0] * item.x2;
-                        }
-                        if (item.y2) {
-                            item.y2 = this.gridSize[1] * item.y2;
-                        }
-                    }
-                    item.useGrid = value;
-                    this.mutate(`configuration.items[${index}]`, item);
-                }.bind(this));
             },
             bypassSelection($event) {
                 if (this.dragInProgress) {
                     if ($event) {
                         $event.stopImmediatePropagation();
                     }
+                    this.dragInProgress = false;
                     return;
                 }
             },
-            endDrag(item, updates) {
+            endLineResize(item, updates) {
                 this.dragInProgress = true;
-                setTimeout(function () {
-                    this.dragInProgress = false;
-                }.bind(this), 0);
-
                 let index = this.layoutItems.indexOf(item);
                 Object.assign(item, updates);
                 this.mutate(`configuration.items[${index}]`, item);
             },
+            endResize(scaleWidth, scaleHeight, marqueeStart, marqueeOffset) {
+                this.dragInProgress = true;
+                this.layoutItems.forEach(item => {
+                    if (this.itemIsInCurrentSelection(item)) {
+                        let itemXInMarqueeSpace = item.x - marqueeStart.x;
+                        let itemXInMarqueeSpaceAfterScale = Math.round(itemXInMarqueeSpace * scaleWidth);
+                        item.x = itemXInMarqueeSpaceAfterScale + marqueeOffset.x + marqueeStart.x;
+
+                        let itemYInMarqueeSpace = item.y - marqueeStart.y;
+                        let itemYInMarqueeSpaceAfterScale = Math.round(itemYInMarqueeSpace * scaleHeight);
+                        item.y = itemYInMarqueeSpaceAfterScale + marqueeOffset.y + marqueeStart.y;
+
+                        if (item.x2) {
+                            let itemX2InMarqueeSpace = item.x2 - marqueeStart.x;
+                            let itemX2InMarqueeSpaceAfterScale = Math.round(itemX2InMarqueeSpace * scaleWidth);
+                            item.x2 = itemX2InMarqueeSpaceAfterScale + marqueeOffset.x + marqueeStart.x;
+                        } else {
+                            item.width = Math.round(item.width * scaleWidth);
+                        }
+
+                        if (item.y2) {
+                            let itemY2InMarqueeSpace = item.y2 - marqueeStart.y;
+                            let itemY2InMarqueeSpaceAfterScale = Math.round(itemY2InMarqueeSpace * scaleHeight);
+                            item.y2 = itemY2InMarqueeSpaceAfterScale + marqueeOffset.y + marqueeStart.y;
+                        } else {
+                            item.height = Math.round(item.height * scaleHeight);
+                        }
+                    }
+                });
+                this.mutate("configuration.items", this.layoutItems);
+            },
+            move(gridDelta) {
+                this.dragInProgress = true;
+
+                if (!this.initialPositions) {
+                    this.initialPositions = {};
+                    _.cloneDeep(this.selectedLayoutItems).forEach(selectedItem => {
+                        if (selectedItem.type === 'line-view') {
+                            this.initialPositions[selectedItem.id] = [selectedItem.x, selectedItem.y, selectedItem.x2, selectedItem.y2];
+                        } else {
+                            this.initialPositions[selectedItem.id] = [selectedItem.x, selectedItem.y];
+                        }
+                    });
+                }
+
+                let layoutItems = this.layoutItems.map(item => {
+                    if (this.initialPositions[item.id]) {
+                        let startingPosition = this.initialPositions[item.id];
+                        let [startingX, startingY, startingX2, startingY2] = startingPosition;
+                        item.x = startingX + gridDelta[0];
+                        item.y = startingY + gridDelta[1];
+
+                        if (item.x2) {
+                            item.x2 = startingX2 + gridDelta[0];
+                        }
+
+                        if (item.y2) {
+                            item.y2 = startingY2 + gridDelta[1];
+                        }
+                    }
+                    return item;
+                });
+            },
+            endMove() {
+                this.mutate('configuration.items', this.layoutItems);
+                this.initialPositions = undefined;
+            },
             mutate(path, value) {
                 this.openmct.objects.mutate(this.internalDomainObject, path, value);
             },
@@ -313,11 +384,15 @@
                     this.objectViewMap[keyString] = true;
                 }
             },
-            removeItem(item, index) {
+            removeItem(selectedItems) {
+                let indices = [];
                 this.initSelectIndex = -1;
-                this.layoutItems.splice(index, 1);
+                selectedItems.forEach(selectedItem => {
+                    indices.push(selectedItem[0].context.index);
+                    this.untrackItem(selectedItem[0].context.layoutItem);
+                });
+                _.pullAt(this.layoutItems, indices);
                 this.mutate("configuration.items", this.layoutItems);
-                this.untrackItem(item);
                 this.$el.click();
             },
             untrackItem(item) {
@@ -383,20 +458,74 @@
                 this.mutate("configuration.items", layoutItems);
                 this.$el.click();
             },
-            orderItem(position, index) {
+            orderItem(position, selectedItems) {
                 let delta = ORDERS[position];
-                let newIndex = Math.max(Math.min(index + delta, this.layoutItems.length - 1), 0);
+                let indices = [];
-                let item = this.layoutItems[index];
+                let newIndex = -1;
+                let items = [];
 
-                if (newIndex !== index) {
+                Object.assign(items, this.layoutItems);
-                    this.layoutItems.splice(index, 1);
+                this.selectedLayoutItems.forEach(selectedItem => {
-                    this.layoutItems.splice(newIndex, 0, item);
+                    indices.push(this.layoutItems.indexOf(selectedItem));
-                    this.mutate('configuration.items', this.layoutItems);
+                });
+                indices.sort((a, b) => a - b);
 
-                    if (this.removeSelectionListener) {
+                if (position === 'top' || position === 'up') {
-                        this.removeSelectionListener();
+                    indices.reverse();
-                        this.attachSelectionListener(newIndex);
                 }
+
+                if (position === 'top' || position === 'bottom') {
+                    this.moveToTopOrBottom(position, indices, items, delta);
+                } else {
+                    this.moveUpOrDown(position, indices, items, delta);
+                }
+
+                this.mutate('configuration.items', this.layoutItems);
+            },
+            moveUpOrDown(position, indices, items, delta) {
+                let previousItemIndex = -1;
+                let newIndex = -1;
+
+                indices.forEach((itemIndex, index) => {
+                    let isAdjacentItemSelected = position === 'up' ?
+                        itemIndex + 1 === previousItemIndex :
+                        itemIndex - 1 === previousItemIndex;
+
+                    if (index > 0 && isAdjacentItemSelected) {
+                        if (position === 'up') {
+                            newIndex -= 1;
+                        } else {
+                            newIndex += 1;
+                        }
+                    } else {
+                        newIndex = Math.max(Math.min(itemIndex + delta, this.layoutItems.length - 1), 0);
+                    }
+
+                    previousItemIndex = itemIndex;
+                    this.updateItemOrder(newIndex, itemIndex, items);
+                });
+            },
+            moveToTopOrBottom(position, indices, items, delta) {
+                let newIndex = -1;
+
+                indices.forEach((itemIndex, index) => {
+                    if (index === 0) {
+                        newIndex = Math.max(Math.min(itemIndex + delta, this.layoutItems.length - 1), 0);
+                    } else {
+                        if (position === 'top') {
+                            newIndex -= 1;
+                        } else {
+                            newIndex += 1;
+                        }
+                    }
+
+                    this.updateItemOrder(newIndex, itemIndex, items);
+                });
+            },
+            updateItemOrder(newIndex, itemIndex, items) {
+                if (newIndex !== itemIndex) {
+                    this.layoutItems.splice(itemIndex, 1);
+                    this.layoutItems.splice(newIndex, 0, items[itemIndex]);
                 }
             }
         },
@@ -412,14 +541,10 @@
             this.composition.load();
         },
         destroyed: function () {
-            this.openmct.off('change', this.setSelection);
+            this.openmct.selection.off('change', this.setSelection);
             this.composition.off('add', this.addChild);
             this.composition.off('remove', this.removeChild);
             this.unlisten();
-
-            if (this.removeSelectionListener) {
-                this.removeSelectionListener();
-            }
         }
     }
 </script>

src/plugins/displayLayout/components/EditMarquee.vue

@@ -0,0 +1,233 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2018, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+<template>
+        <!-- Resize handles -->
+        <div class="c-frame-edit" :style="style">
+            <div class="c-frame-edit__handle c-frame-edit__handle--nw"
+                 @mousedown="startResize([1,1], [-1,-1], $event)"></div>
+            <div class="c-frame-edit__handle c-frame-edit__handle--ne"
+                 @mousedown="startResize([0,1], [1,-1], $event)"></div>
+            <div class="c-frame-edit__handle c-frame-edit__handle--sw"
+                 @mousedown="startResize([1,0], [-1,1], $event)"></div>
+            <div class="c-frame-edit__handle c-frame-edit__handle--se"
+                 @mousedown="startResize([0,0], [1,1], $event)"></div>
+        </div>
+</template>
+
+<style lang="scss">
+    @import "~styles/sass-base";
+
+    .c-frame-edit {
+        // In Layouts, this is the editing rect and handles
+        display: none; // Set to display: block in DisplayLayout.vue
+        pointer-events: none;
+        @include abs();
+        border: $editMarqueeBorder;
+
+        &__handle {
+            $d: 6px;
+            $o: floor($d * -0.5);
+            background: $editFrameColorHandleFg;
+            box-shadow: $editFrameColorHandleBg 0 0 0 2px;
+            pointer-events: all;
+            position: absolute;
+            width: $d; height: $d;
+            top: auto; right: auto; bottom: auto; left: auto;
+
+            &:before {
+                // Extended hit area
+                @include abs(-10px);
+                content: '';
+                display: block;
+                z-index: 0;
+            }
+
+            &:hover {
+                background: $editUIColor;
+            }
+
+            &--nwse {
+                cursor: nwse-resize;
+            }
+
+            &--nw {
+                cursor: nw-resize;
+                left: $o; top: $o;
+            }
+
+            &--ne {
+                cursor: ne-resize;
+                right: $o; top: $o;
+            }
+
+            &--se {
+                cursor: se-resize;
+                right: $o; bottom: $o;
+            }
+
+            &--sw {
+                cursor: sw-resize;
+                left: $o; bottom: $o;
+            }
+        }
+    }
+</style>
+
+
+<script>
+    import LayoutDrag from './../LayoutDrag'
+
+    export default {
+        inject: ['openmct'],
+        props: {
+            selectedLayoutItems: Array,
+            gridSize: Array
+        },        
+        data() {
+            return {
+                dragPosition: undefined
+            }
+        },
+        computed: {
+            style() {
+                let x = Number.POSITIVE_INFINITY;
+                let y = Number.POSITIVE_INFINITY;
+                let width = Number.NEGATIVE_INFINITY;
+                let height = Number.NEGATIVE_INFINITY;
+
+                this.selectedLayoutItems.forEach(item => {
+                    if (item.x2) {
+                        let lineWidth = Math.abs(item.x - item.x2);
+                        let lineMinX = Math.min(item.x, item.x2);
+                        x = Math.min(lineMinX, x);
+                        width = Math.max(lineWidth + lineMinX, width);
+                    } else {
+                        x = Math.min(item.x, x);
+                        width = Math.max(item.width + item.x, width);
+                    }
+
+                    if (item.y2) {
+                        let lineHeight = Math.abs(item.y - item.y2);
+                        let lineMinY = Math.min(item.y, item.y2);
+                        y = Math.min(lineMinY, y);
+                        height = Math.max(lineHeight + lineMinY, height);
+                    } else {
+                        y = Math.min(item.y, y);
+                        height = Math.max(item.height + item.y, height);
+                    }
+                });
+
+                if (this.dragPosition) {
+                    [x, y] = this.dragPosition.position;
+                    [width, height] = this.dragPosition.dimensions;
+                } else {
+                    width = width - x;
+                    height = height - y;
+                }
+
+                this.marqueePosition = {
+                    x: x,
+                    y: y,
+                    width: width,
+                    height: height
+                }
+                return this.getMarqueeStyle(x, y, width, height);
+            }
+        },
+        methods: {
+            getMarqueeStyle(x, y, width, height) {
+                return {
+                    left: (this.gridSize[0] * x) + 'px',
+                    top: (this.gridSize[1] * y) + 'px',
+                    width: (this.gridSize[0] * width) + 'px',
+                    height: (this.gridSize[1] * height) + 'px'
+                };
+            },
+            updatePosition(event) {
+                let currentPosition = [event.pageX, event.pageY];
+                this.initialPosition = this.initialPosition || currentPosition;
+                this.delta = currentPosition.map(function (value, index) {
+                    return value - this.initialPosition[index];
+                }.bind(this));
+            },
+            startResize(posFactor, dimFactor, event) {
+                document.body.addEventListener('mousemove', this.continueResize);
+                document.body.addEventListener('mouseup', this.endResize);
+                this.marqueeStartPosition = {
+                    position: [this.marqueePosition.x, this.marqueePosition.y],
+                    dimensions: [this.marqueePosition.width, this.marqueePosition.height]
+                };
+                this.updatePosition(event);
+                this.activeDrag = new LayoutDrag(this.marqueeStartPosition, posFactor, dimFactor, this.gridSize);
+                event.preventDefault();
+            },
+            continueResize(event) {
+                event.preventDefault();
+                this.updatePosition(event);
+                this.dragPosition = this.activeDrag.getAdjustedPositionAndDimensions(this.delta);
+            },
+            endResize(event) {
+                document.body.removeEventListener('mousemove', this.continueResize);
+                document.body.removeEventListener('mouseup', this.endResize);
+                this.continueResize(event);
+
+                let marqueeStartWidth = this.marqueeStartPosition.dimensions[0];
+                let marqueeStartHeight = this.marqueeStartPosition.dimensions[1];
+                let marqueeStartX = this.marqueeStartPosition.position[0];
+                let marqueeStartY = this.marqueeStartPosition.position[1];
+
+                let marqueeEndX = this.dragPosition.position[0];
+                let marqueeEndY = this.dragPosition.position[1];
+                let marqueeEndWidth = this.dragPosition.dimensions[0];
+                let marqueeEndHeight = this.dragPosition.dimensions[1];
+
+                let scaleWidth =  marqueeEndWidth / marqueeStartWidth;
+                let scaleHeight =  marqueeEndHeight / marqueeStartHeight;
+
+                let marqueeStart = {
+                    x: marqueeStartX,
+                    y: marqueeStartY,
+                    height: marqueeStartWidth,
+                    width: marqueeStartHeight
+                };
+                let marqueeEnd = {
+                    x: marqueeEndX,
+                    y: marqueeEndY,
+                    width: marqueeEndWidth,
+                    height: marqueeEndHeight
+                };
+                let marqueeOffset = {
+                    x: marqueeEnd.x - marqueeStart.x,
+                    y: marqueeEnd.y - marqueeStart.y
+                };
+
+                this.$emit('endResize', scaleWidth, scaleHeight, marqueeStart, marqueeOffset);
+                this.dragPosition = undefined;
+                this.initialPosition = undefined;
+                this.marqueeStartPosition = undefined;
+                this.delta = undefined;
+                event.preventDefault();
+            }
+        }
+    }
+</script>

src/plugins/displayLayout/components/ImageView.vue

@@ -23,7 +23,8 @@
 <template>
     <layout-frame :item="item"
                   :grid-size="gridSize"
-                  @endDrag="(item, updates) => $emit('endDrag', item, updates)">
+                  @move="(gridDelta) => $emit('move', gridDelta)"
+                  @endMove="() => $emit('endMove')">
         <div class="c-image-view"
              :style="style">
         </div>
@@ -56,8 +57,7 @@
                 y: 1,
                 width: 10,
                 height: 5,
-                url: element.url,
+                url: element.url
-                useGrid: true
             };
         },
         inject: ['openmct'],

src/plugins/displayLayout/components/LayoutFrame.vue

@@ -24,25 +24,14 @@
     <div class="l-layout__frame c-frame"
          :class="{
              'no-frame': !item.hasFrame,
-             'u-inspectable': inspectable,
+             'u-inspectable': inspectable
-             'is-resizing': isResizing
          }"
          :style="style">
 
         <slot></slot>
 
-        <!-- Drag handles -->
-        <div class="c-frame-edit">
         <div class="c-frame-edit__move"
-                 @mousedown="startDrag([1,1], [0,0], $event, 'move')"></div>
+             @mousedown="startMove([1,1], [0,0], $event)">
-            <div class="c-frame-edit__handle c-frame-edit__handle--nw"
-                 @mousedown="startDrag([1,1], [-1,-1], $event, 'resize')"></div>
-            <div class="c-frame-edit__handle c-frame-edit__handle--ne"
-                 @mousedown="startDrag([0,1], [1,-1], $event, 'resize')"></div>
-            <div class="c-frame-edit__handle c-frame-edit__handle--sw"
-                 @mousedown="startDrag([1,0], [-1,1], $event, 'resize')"></div>
-            <div class="c-frame-edit__handle c-frame-edit__handle--se"
-                 @mousedown="startDrag([0,0], [1,1], $event, 'resize')"></div>
         </div>
     </div>
 </template>
@@ -50,7 +39,7 @@
 <style lang="scss">
     @import "~styles/sass-base";
 
-    /******************************* FRAME */
+    /******************* FRAME */
     .c-frame {
         display: flex;
         flex-direction: column;
@@ -61,74 +50,72 @@
         }
     }
 
-    .c-frame-edit {
+    .c-frame-edit__move {
-        // In Layouts, this is the editing rect and handles
-        // In Fixed Position, this is a wrapper element
-        @include abs();
         display: none;
+    }
 
-        &__move {
+    .is-editing {
-            @include abs();
+        /******************* STYLES FOR C-FRAME WHILE EDITING */
+        .c-frame {
+            &:not([s-selected]) {
+                &:hover {
+                    border: $editFrameBorderHov;
+                }
+            }
+
+            &[s-selected] {
+                // All frames selected while editing
+                border: $editFrameSelectedBorder;
+                box-shadow: $editFrameSelectedShdw;
+
+                .c-frame-edit__move {
                     cursor: move;
                 }
-
-        &__handle {
-            $d: 6px;
-            $o: floor($d * -0.5);
-            background: $editFrameColorHandleFg;
-            box-shadow: $editFrameColorHandleBg 0 0 0 2px;
-            display: none; // Set to block via s-selected selector
-            position: absolute;
-            width: $d; height: $d;
-            top: auto; right: auto; bottom: auto; left: auto;
-
-            &:before {
-                // Extended hit area
-                @include abs(-10px);
-                content: '';
-                display: block;
-                z-index: 0;
-            }
-
-            &:hover {
-                background: $editUIColor;
-            }
-
-            &--nwse {
-                cursor: nwse-resize;
-            }
-
-            &--nw {
-                cursor: nw-resize;
-                left: $o; top: $o;
-            }
-
-            &--ne {
-                cursor: ne-resize;
-                right: $o; top: $o;
-            }
-
-            &--se {
-                cursor: se-resize;
-                right: $o; bottom: $o;
-            }
-
-            &--sw {
-                cursor: sw-resize;
-                left: $o; bottom: $o;
-            }
             }
         }
 
-    .c-so-view.has-complex-content + .c-frame-edit {
+        /******************* DEFAULT STYLES FOR -EDIT__MOVE */
-        // Target frames that hold domain objects that include header elements, as opposed to drawing and alpha objects
+        // All object types
-        // Make the __move element a more affordable drag UI element
         .c-frame-edit__move {
+            @include abs();
+            display: block;
+        }
+
+        // Has-complex-content objects
+        .c-so-view.has-complex-content {
+            transition: $transOut;
+            transition-delay: $moveBarOutDelay;
+
+            > .c-so-view__local-controls {
+                transition: transform 250ms ease-in-out;
+                transition-delay: $moveBarOutDelay;
+            }
+
+            + .c-frame-edit__move {
+                display: none;
+            }
+
+        }
+
+        .l-layout {
+            /******************* 0 - 1 ITEM SELECTED */
+            &:not(.is-multi-selected) {
+                > .l-layout__frame[s-selected] {
+                    > .c-so-view.has-complex-content {
+                        > .c-so-view__local-controls {
+                            transition: transform $transOutTime ease-in-out;
+                            transition-delay: $moveBarOutDelay;
+                        }
+
+                        + .c-frame-edit__move {
+                            transition: $transOut;
+                            transition-delay: $moveBarOutDelay;
                             @include userSelectNone();
                             background: $editFrameMovebarColorBg;
                             box-shadow: rgba(black, 0.2) 0 1px;
                             bottom: auto;
-            height: 0; // Height is set on hover on s-selected.c-frame
+                            display: block;
+                            height: 0; // Height is set on hover below
                             opacity: 0.8;
                             max-height: 100%;
                             overflow: hidden;
@@ -143,86 +130,48 @@
                                 content: '';
                                 display: block;
                                 position: absolute;
-                top: $tbOffset; right: $lrOffset; bottom: $tbOffset; left: $lrOffset;
+                                top: $tbOffset;
+                                right: $lrOffset;
+                                bottom: $tbOffset;
+                                left: $lrOffset;
+                            }
+                        }
                     }
 
                     &:hover {
-                background: $editFrameHovMovebarColorBg;
+                        > .c-so-view.has-complex-content {
-                &:before { @include grippy($editFrameHovMovebarColorFg); }
+                            transition: $transIn;
+                            transition-delay: 0s;
+                            padding-top: $editFrameMovebarH + $interiorMarginSm;
+
+                            > .c-so-view__local-controls {
+                                transform: translateY($editFrameMovebarH);
+                                transition: transform $transInTime ease-in-out;
+                                transition-delay: 0s;
+                            }
+
+                            + .c-frame-edit__move {
+                                transition: $transIn;
+                                transition-delay: 0s;
+                                height: $editFrameMovebarH;
+                            }
+                        }
                     }
                 }
             }
 
-    .is-editing {
+            /******************* > 1 ITEMS SELECTED */
-        .c-frame {
+            &.is-multi-selected {
-            &.no-frame {
+                .l-layout__frame[s-selected] {
-                border: $editFrameBorder; // Base border style for a frame element while editing.
+                    > .c-so-view.has-complex-content + .c-frame-edit__move {
-            }
-
-            &-edit {
-                display: contents;
-            }
-
-            &-edit__move,
-            .c-so-view {
-                transition: $transOut;
-                transition-delay: $moveBarOutDelay;
-            }
-
-            &:not([s-selected]) {
-                &:hover {
-                    border: $editFrameBorderHov;
-                }
-            }
-
-            &[s-selected] {
-                // All frames selected while editing
-                border: $editFrameSelectedBorder;
-                box-shadow: $editFrameSelectedShdw;
-
-                > .c-frame-edit {
-                    [class*='__handle'] {
                         display: block;
                     }
                 }
             }
         }
-
-        .l-layout__frame[s-selected]:not(.is-resizing) {
-            // Show and animate the __move bar for sub-object views with complex content
-            > .c-so-view.has-complex-content {
-                > .c-so-view__local-controls {
-                    transition: transform 250ms ease-in-out;
-                    transition-delay: $moveBarOutDelay;
-                }
-            }
-
-            &:hover > .c-so-view.has-complex-content {
-                // Move content down so the __move bar doesn't cover it.
-                padding-top: $editFrameMovebarH;
-                transition: $transIn;
-
-                > .c-so-view__local-controls {
-                    transition: transform 50ms ease-in-out;
-                    transform: translateY($editFrameMovebarH);
-                }
-
-                &.c-so-view--no-frame {
-                    // Move content down with a bit more space
-                    padding-top: $editFrameMovebarH + $interiorMarginSm;
-                }
-
-                // Show the move bar
-                + .c-frame-edit .c-frame-edit__move {
-                    height: $editFrameMovebarH;
-                    transition: $transIn;
-                }
-            }
-        }
     }
 </style>
 
-
 <script>
     import LayoutDrag from './../LayoutDrag'
 
@@ -232,21 +181,9 @@
             item: Object,
             gridSize: Array
         },
-        data() {
-            return {
-                dragPosition: undefined,
-                isResizing: undefined
-            }
-        },
         computed: {
             style() {
                 let {x, y, width, height} = this.item;
-
-                if (this.dragPosition) {
-                    [x, y] = this.dragPosition.position;
-                    [width, height] = this.dragPosition.dimensions;
-                }
-
                 return {
                     left: (this.gridSize[0] * x) + 'px',
                     top: (this.gridSize[1] * y) + 'px',
@@ -268,36 +205,40 @@
                     return value - this.initialPosition[index];
                 }.bind(this));
             },
-            startDrag(posFactor, dimFactor, event, type) {
+            startMove(posFactor, dimFactor, event) {
-                document.body.addEventListener('mousemove', this.continueDrag);
+                document.body.addEventListener('mousemove', this.continueMove);
-                document.body.addEventListener('mouseup', this.endDrag);
+                document.body.addEventListener('mouseup', this.endMove);
-
                 this.dragPosition = {
-                    position: [this.item.x, this.item.y],
+                    position: [this.item.x, this.item.y]
-                    dimensions: [this.item.width, this.item.height]
                 };
                 this.updatePosition(event);
                 this.activeDrag = new LayoutDrag(this.dragPosition, posFactor, dimFactor, this.gridSize);
-                this.isResizing = type === 'resize';
                 event.preventDefault();
             },
-            continueDrag(event) {
+            continueMove(event) {
                 event.preventDefault();
                 this.updatePosition(event);
-                this.dragPosition = this.activeDrag.getAdjustedPosition(this.delta);
+                let newPosition = this.activeDrag.getAdjustedPosition(this.delta);
+
+                if (!_.isEqual(newPosition, this.dragPosition)) {
+                    this.dragPosition = newPosition;
+                    this.$emit('move', this.toGridDelta(this.delta));
+                }
             },
-            endDrag(event) {
+            endMove(event) {
-                document.body.removeEventListener('mousemove', this.continueDrag);
+                document.body.removeEventListener('mousemove', this.continueMove);
-                document.body.removeEventListener('mouseup', this.endDrag);
+                document.body.removeEventListener('mouseup', this.endMove);
-                this.continueDrag(event);
+                this.continueMove(event);
-                let [x, y] = this.dragPosition.position;
+                this.$emit('endMove');
-                let [width, height] = this.dragPosition.dimensions;
-                this.$emit('endDrag', this.item, {x, y, width, height});
                 this.dragPosition = undefined;
                 this.initialPosition = undefined;
                 this.delta = undefined;
-                this.isResizing = undefined;
                 event.preventDefault();
+            },
+            toGridDelta(pixelDelta) {
+                return pixelDelta.map((v, i) => {
+                    return Math.round(v / this.gridSize[i]);
+                });
             }
         }
     }

src/plugins/displayLayout/components/LineView.vue

@@ -30,9 +30,9 @@
             </line>
         </svg>
 
-        <div class="c-frame-edit">
         <div class="c-frame-edit__move"
              @mousedown="startDrag($event)"></div>
+        <div class="c-frame-edit" v-if="showFrameEdit">
             <div class="c-frame-edit__handle"
                  :class="startHandleClass"
                  @mousedown="startDrag($event, 'start')"></div>
@@ -66,8 +66,7 @@
                 y: 10,
                 x2: 10,
                 y2: 5,
-                stroke: '#717171',
+                stroke: '#717171'
-                useGrid: true
             };
         },
         inject: ['openmct'],
@@ -76,24 +75,31 @@
             gridSize: Array,
             initSelect: Boolean,
             index: Number,
+            multiSelect: Boolean
         },
         data() {
             return {
-                dragPosition: undefined
+                dragPosition: undefined,
+                dragging: undefined,
+                selection: []
             };
         },
         computed: {
+            showFrameEdit() {
+                let layoutItem = this.selection.length > 0 && this.selection[0][0].context.layoutItem;
+                return !this.multiSelect && layoutItem && layoutItem.id === this.item.id;
+            },
             position() {
                 let {x, y, x2, y2} = this.item;
-                if (this.dragPosition) {
+                if (this.dragging && this.dragPosition) {
                     ({x, y, x2, y2} = this.dragPosition);
                 }
                 return {x, y, x2, y2};
             },
             style() {
                 let {x, y, x2, y2} = this.position;
-                let width = this.gridSize[0] * Math.abs(x - x2);
+                let width = Math.max(this.gridSize[0] * Math.abs(x - x2), 1);
-                let height = this.gridSize[1] * Math.abs(y - y2);
+                let height = Math.max(this.gridSize[1] * Math.abs(y - y2), 1);
                 let left = this.gridSize[0] * Math.min(x, x2);
                 let top = this.gridSize[1] * Math.min(y, y2);
                 return {
@@ -175,13 +181,27 @@
                 event.preventDefault();
                 let pxDeltaX = this.startPosition[0] - event.pageX;
                 let pxDeltaY = this.startPosition[1] - event.pageY;
-                this.dragPosition = this.calculateDragPosition(pxDeltaX, pxDeltaY);
+                let newPosition = this.calculateDragPosition(pxDeltaX, pxDeltaY);
+
+                if (!this.dragging) {
+                    if (!_.isEqual(newPosition, this.dragPosition)) {
+                        let gridDelta = [event.pageX - this.startPosition[0], event.pageY - this.startPosition[1]];
+                        this.dragPosition = newPosition;
+                        this.$emit('move', this.toGridDelta(gridDelta));
+                    }
+                } else {
+                    this.dragPosition = newPosition;
+                }
             },
             endDrag(event) {
                 document.body.removeEventListener('mousemove', this.continueDrag);
                 document.body.removeEventListener('mouseup', this.endDrag);
                 let {x, y, x2, y2} = this.dragPosition;
-                this.$emit('endDrag', this.item, {x, y, x2, y2});
+                if (!this.dragging) {
+                    this.$emit('endMove');
+                } else {
+                    this.$emit('endLineResize', this.item, {x, y, x2, y2});
+                }
                 this.dragPosition = undefined;
                 this.dragging = undefined;
                 event.preventDefault();
@@ -191,6 +211,7 @@
                 let gridDeltaY = Math.round(pxDeltaY / this.gridSize[0]); // TODO: should this be gridSize[1]?
                 let {x, y, x2, y2} = this.item;
                 let dragPosition = {x, y, x2, y2};
+
                 if (this.dragging === 'start') {
                     dragPosition.x -= gridDeltaX;
                     dragPosition.y -= gridDeltaY;
@@ -205,6 +226,14 @@
                     dragPosition.y2 -= gridDeltaY;
                 }
                 return dragPosition;
+            },
+            setSelection(selection) {
+                this.selection = selection;
+            },
+            toGridDelta(pixelDelta) {
+                return pixelDelta.map((v, i) => {
+                    return Math.round(v / this.gridSize[i]);
+                });
             }
         },
         watch: {
@@ -217,6 +246,7 @@
             }
         },
         mounted() {
+            this.openmct.selection.on('change', this.setSelection);
             this.context = {
                 layoutItem: this.item,
                 index: this.index
@@ -228,6 +258,7 @@
             if (this.removeSelectable) {
                 this.removeSelectable();
             }
+            this.openmct.selection.off('change', this.setSelection);
         }
     }
  </script>

src/plugins/displayLayout/components/SubobjectView.vue

@@ -22,7 +22,8 @@
 <template>
     <layout-frame :item="item"
                   :grid-size="gridSize"
-                  @endDrag="(item, updates) => $emit('endDrag', item, updates)">
+                  @move="(gridDelta) => $emit('move', gridDelta)"
+                  @endMove="() => $emit('endMove')">
         <object-frame v-if="domainObject"
                       :domain-object="domainObject"
                       :object-path="objectPath"
@@ -66,8 +67,7 @@
                 x: position[0],
                 y: position[1],
                 identifier: domainObject.identifier,
-                hasFrame: hasFrameByDefault(domainObject.type),
+                hasFrame: hasFrameByDefault(domainObject.type)
-                useGrid: true
             };
         },
         inject: ['openmct'],

src/plugins/displayLayout/components/TelemetryView.vue

@@ -23,7 +23,8 @@
  <template>
      <layout-frame :item="item"
                    :grid-size="gridSize"
-                   @endDrag="(item, updates) => $emit('endDrag', item, updates)">
+                   @move="(gridDelta) => $emit('move', gridDelta)"
+                   @endMove="() => $emit('endMove')">
         <div class="c-telemetry-view"
              :style="styleObject"
              v-if="domainObject">
@@ -96,10 +97,9 @@
                 displayMode: 'all',
                 value: metadata.getDefaultDisplayValue(),
                 stroke: "transparent",
-                fill: "",
+                fill: "transparent",
                 color: "",
-                size: "13px",
+                size: "13px"
-                useGrid: true
             };
         },
         inject: ['openmct'],

src/plugins/displayLayout/components/TextView.vue

@@ -23,7 +23,8 @@
  <template>
     <layout-frame :item="item"
                   :grid-size="gridSize"
-                  @endDrag="(item, updates) => $emit('endDrag', item, updates)">
+                  @move="(gridDelta) => $emit('move', gridDelta)"
+                  @endMove="() => $emit('endMove')">
         <div class="c-text-view"
              :style="style">
             {{ item.text }}
@@ -59,8 +60,7 @@
                 y: 1,
                 width: 10,
                 height: 5,
-                text: element.text,
+                text: element.text
-                useGrid: true
             };
         },
         inject: ['openmct'],

src/plugins/displayLayout/plugin.js

@@ -60,6 +60,7 @@ export default function DisplayLayoutPlugin(options) {
                     getSelectionContext() {
                         return {
                             item: domainObject,
+                            supportsMultiSelect: true,
                             addElement: component && component.$refs.displayLayout.addElement,
                             removeItem: component && component.$refs.displayLayout.removeItem,
                             orderItem: component && component.$refs.displayLayout.orderItem

src/plugins/filters/filtersInspectorViewProvider.js

@@ -33,16 +33,16 @@ define([
             key: 'filters-inspector',
             name: 'Filters Inspector View',
             canView: function (selection) {
-                if (selection.length === 0) {
+                if (selection.length === 0 || selection[0].length === 0) {
                     return false;
                 }
-                let object = selection[0].context.item;
+                let object = selection[0][0].context.item;
 
                 return object && supportedObjectTypesArray.some(type => object.type === type);
             },
             view: function (selection) {
                 let component;
-                let providedObject = selection[0].context.item;
+                let providedObject = selection[0][0].context.item;
 
                 return {
                     show: function (element) {
@@ -59,10 +59,12 @@ define([
                         });
                     },
                     destroy: function () {
+                        if (component) {
                             component.$destroy();
                             component = undefined;
                         }
                     }
+                }
             },
             priority: function () {
                 return 1;

src/plugins/flexibleLayout/toolbarProvider.js

@@ -27,16 +27,17 @@ function ToolbarProvider(openmct) {
         key: "flex-layout",
         description: "A toolbar for objects inside a Flexible Layout.",
         forSelection: function (selection) {
-            let context = selection[0].context;
+            let context = selection[0][0].context;
 
             return (context && context.type &&
                 (context.type === 'flexible-layout' || context.type === 'container' || context.type === 'frame'));
         },
         toolbar: function (selection) {
 
-            let primary = selection[0],
+            let selectionPath = selection[0],
-                secondary = selection[1],
+                primary = selectionPath[0],
-                tertiary = selection[2],
+                secondary = selectionPath[1],
+                tertiary = selectionPath[2],
                 deleteFrame,
                 toggleContainer,
                 deleteContainer,
@@ -46,7 +47,7 @@ function ToolbarProvider(openmct) {
 
             separator = {
                 control: "separator",
-                domainObject: selection[0].context.item,
+                domainObject: primary.context.item,
                 key: "separator"
             };
 

src/plugins/objectMigration/Migrations.js

@@ -71,7 +71,6 @@ define([
                         height: panel.dimensions[1],
                         x: panel.position[0],
                         y: panel.position[1],
-                        useGrid: true,
                         identifier: domainObject.identifier,
                         id: uuid(),
                         type: 'telemetry-view',
@@ -88,7 +87,6 @@ define([
                         height: panel.dimensions[1],
                         x: panel.position[0],
                         y: panel.position[1],
-                        useGrid: true,
                         identifier: domainObject.identifier,
                         id: uuid(),
                         type: 'subobject-view',
@@ -104,7 +102,7 @@ define([
             return migratedObject;
         }
 
-        function migrateFixedPositionConfiguration(elements, telemetryObjects) {
+        function migrateFixedPositionConfiguration(elements, telemetryObjects, gridSize) {
             const DEFAULT_STROKE = "transparent";
             const DEFAULT_SIZE = "13px";
             const DEFAULT_COLOR = "";
@@ -117,10 +115,16 @@ define([
                     y: element.y,
                     width: element.width,
                     height: element.height,
-                    useGrid: element.useGrid,
                     id: uuid()
                 };
 
+                if (!element.useGrid) {
+                    item.x = Math.round(item.x / gridSize[0]);
+                    item.y = Math.round(item.y / gridSize[1]);
+                    item.width = Math.round(item.width / gridSize[0]);
+                    item.height = Math.round(item.height / gridSize[1]);
+                }
+
                 if (element.type === "fixed.telemetry") {
                     item.type = "telemetry-view";
                     item.stroke = element.stroke || DEFAULT_STROKE;
@@ -192,10 +196,11 @@ define([
                         name: domainObject.name,
                         type: "layout"
                     };
+                    let gridSize = domainObject.layoutGrid || DEFAULT_GRID_SIZE;
                     let layoutType = openmct.types.get('layout');
                     layoutType.definition.initialize(newLayoutObject);
                     newLayoutObject.composition = domainObject.composition;
-                    newLayoutObject.configuration.layoutGrid = domainObject.layoutGrid || DEFAULT_GRID_SIZE;
+                    newLayoutObject.configuration.layoutGrid = gridSize;
 
                     let elements = domainObject.configuration['fixed-display'].elements;
                     let telemetryObjects = {};
@@ -211,7 +216,7 @@ define([
                     return Promise.all(promises)
                         .then(function () {
                             newLayoutObject.configuration.items =
-                                migrateFixedPositionConfiguration(elements, telemetryObjects);
+                                migrateFixedPositionConfiguration(elements, telemetryObjects, gridSize);
                             return newLayoutObject;
                         });
                 }

src/plugins/telemetryTable/TableConfigurationViewProvider.js

@@ -37,15 +37,15 @@ define([
             key: 'table-configuration',
             name: 'Telemetry Table Configuration',
             canView: function (selection) {
-                if (selection.length === 0) {
+                if (selection.length === 0 || selection[0].length === 0) {
                     return false;
                 }
-                let object = selection[0].context.item;
+                let object = selection[0][0].context.item;
                 return object && object.type === 'table';
             },
             view: function (selection) {
                 let component;
-                let domainObject = selection[0].context.item;
+                let domainObject = selection[0][0].context.item;
                 let tableConfiguration = new TelemetryTableConfiguration(domainObject, openmct);
                 return {
                     show: function (element) {
@@ -62,8 +62,11 @@ define([
                         });
                     },
                     destroy: function () {
+                        if (component) {
                             component.$destroy();
                             component = undefined;
+                        }
+
                         tableConfiguration = undefined;
                     }
                 }

src/selection/Selection.js

@@ -20,7 +20,15 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
-define(['EventEmitter'], function (EventEmitter) {
+define(
+    [
+        'EventEmitter',
+        'lodash'
+    ],
+    function (
+        EventEmitter,
+        _
+) {
 
     /**
      * Manages selection state for Open MCT
@@ -47,21 +55,87 @@ define(['EventEmitter'], function (EventEmitter) {
      * Selects the selectable object and emits the 'change' event.
      *
      * @param {object} selectable an object with element and context properties
+     * @param {Boolean} isMultiSelectEvent flag indication shift key is pressed or not
      * @private
      */
-    Selection.prototype.select = function (selectable) {
+    Selection.prototype.select = function (selectable, isMultiSelectEvent) {
         if (!Array.isArray(selectable)) {
             selectable = [selectable];
         }
 
-        if (this.selected[0] && this.selected[0].element) {
+        let multiSelect = isMultiSelectEvent &&
-            this.selected[0].element.removeAttribute('s-selected');
+            this.parentSupportsMultiSelect(selectable) &&
+            this.isPeer(selectable) &&
+            !this.selectionContainsParent(selectable);
+
+        if (multiSelect) {
+            this.handleMultiSelect(selectable);
+        } else {
+            this.setSelectionStyles(selectable);
+            this.selected = [selectable];
         }
 
-        if (this.selected[1] && this.selected[1].element) {
+        this.emit('change', this.selected);
-            this.selected[1].element.removeAttribute('s-selected-parent');
+    };
+
+    /**
+     * @private
+     */
+    Selection.prototype.handleMultiSelect = function (selectable) {
+        if (this.elementSelected(selectable)) {
+            this.remove(selectable);
+        } else {
+            this.addSelectionAttributes(selectable);
+            this.selected.push(selectable);
+        }
+    };
+
+    /**
+     * @private
+     */
+    Selection.prototype.elementSelected = function (selectable) {
+        return this.selected.some(selectionPath => _.isEqual(selectionPath, selectable));
+    };
+
+    /**
+     * @private
+     */
+    Selection.prototype.remove = function (selectable) {
+        this.selected = this.selected.filter(selectionPath => !_.isEqual(selectionPath, selectable));
+
+        if (this.selected.length === 0) {
+            this.removeSelectionAttributes(selectable);
+            selectable[1].element.click(); // Select the parent if there is no selection.
+        } else {
+            this.removeSelectionAttributes(selectable, true);
+        }
+    };
+
+    /**
+     * @private
+     */
+     Selection.prototype.setSelectionStyles = function (selectable) {
+        this.selected.map(selectionPath => {
+            this.removeSelectionAttributes(selectionPath);
+        });
+        this.addSelectionAttributes(selectable);
+     };
+
+    Selection.prototype.removeSelectionAttributes = function (selectionPath, keepParentStyle) {
+        if (selectionPath[0] && selectionPath[0].element) {
+            selectionPath[0].element.removeAttribute('s-selected');
         }
 
+        if (selectionPath[1] && selectionPath[1].element && !keepParentStyle) {
+            selectionPath[1].element.removeAttribute('s-selected-parent');
+        }
+    };
+
+    /*
+     * Adds selection attributes to the selected element and its parent.
+     * @private
+     */
+    Selection.prototype.addSelectionAttributes = function (selectable) {
         if (selectable[0] && selectable[0].element) {
             selectable[0].element.setAttribute('s-selected', "");
         }
@@ -69,16 +143,36 @@ define(['EventEmitter'], function (EventEmitter) {
         if (selectable[1] && selectable[1].element) {
             selectable[1].element.setAttribute('s-selected-parent', "");
         }
+    };
 
-        this.selected = selectable;
+    /**
-        this.emit('change', this.selected);
+     * @private
+     */
+    Selection.prototype.parentSupportsMultiSelect = function (selectable) {
+        return selectable[1] && selectable[1].context.supportsMultiSelect;
+    };
+
+    /**
+     * @private
+     */
+    Selection.prototype.selectionContainsParent = function (selectable) {
+        return this.selected.some(selectionPath => _.isEqual(selectionPath[0], selectable[1]));
+    };
+
+    /**
+     * @private
+     */
+    Selection.prototype.isPeer = function (selectable) {
+        return this.selected.some(selectionPath => _.isEqual(selectionPath[1], selectable[1]));
     };
 
     /**
      * @private
      */
     Selection.prototype.capture = function (selectable) {
-        if (!this.capturing) {
+        let capturingContainsSelectable = this.capturing && this.capturing.includes(selectable);
+
+        if (!this.capturing || capturingContainsSelectable) {
             this.capturing = [];
         }
 
@@ -88,13 +182,14 @@ define(['EventEmitter'], function (EventEmitter) {
     /**
      * @private
      */
-    Selection.prototype.selectCapture = function (selectable) {
+    Selection.prototype.selectCapture = function (selectable, event) {
         if (!this.capturing) {
             return;
         }
 
-        this.select(this.capturing.reverse());
+        let reversedCapturing = this.capturing.reverse();
         delete this.capturing;
+        this.select(reversedCapturing, event.shiftKey);
     };
 
     /**
@@ -112,7 +207,7 @@ define(['EventEmitter'], function (EventEmitter) {
      * @public
      */
     Selection.prototype.selectable = function (element, context, select) {
-        var selectable = {
+        let selectable = {
             context: context,
             element: element
         };

src/styles-new/_constants-espresso.scss

@@ -159,8 +159,8 @@ $editFrameBorderHov: 1px solid $editFrameColorHov; // Hover on selectable frames
 $editFrameColorSelected: #ccc; // Border of selected frames
 $editFrameColorHandleBg: $colorBodyBg; // Resize handle 'offset' color to make handle standout
 $editFrameColorHandleFg: $editFrameColorSelected; // Resize handle main color
-$editFrameSelectedShdw: rgba(black, 0.5) 0 1px 10px 1px;
+$editFrameSelectedShdw: rgba(black, 0.4) 0 1px 5px 1px;
-$editFrameSelectedBorder: 1px dashed $editFrameColorSelected; // Selected frame element
+$editFrameSelectedBorder: 1px solid $editFrameColorHov; // Selected frame element
 $editFrameMovebarColorBg: $editFrameColor; // Movebar bg color
 $editFrameMovebarColorFg: pullForward($editFrameMovebarColorBg, 20%);  // Grippy lines, container size text
 $editFrameHovMovebarColorBg: pullForward($editFrameMovebarColorBg, 10%); // Hover style
@@ -168,6 +168,7 @@ $editFrameHovMovebarColorFg: pullForward($editFrameMovebarColorFg, 10%);
 $editFrameSelectedMovebarColorBg: pullForward($editFrameMovebarColorBg, 15%); // Selected style
 $editFrameSelectedMovebarColorFg: pullForward($editFrameMovebarColorFg, 15%);
 $editFrameMovebarH: 10px; // Height of move bar in layout frame
+$editMarqueeBorder: 1px dashed $editFrameColorSelected;
 
 // Icons
 $colorIconAlias: #4af6f3;
@@ -224,6 +225,8 @@ $menuItemPad: $interiorMargin, floor($interiorMargin * 1.25);
 $paletteItemBorderOuterColorSelected: black;
 $paletteItemBorderInnerColorSelected: white;
 $paletteItemBorderInnerColor: rgba($paletteItemBorderOuterColorSelected, 0.3);
+$mixedSettingBg: (transparent rgba($editUIBaseColorHov, 0.7)); // Used in .c-click-icon--mixed
+$mixedSettingBgSize: 5px;
 
 // Forms
 $colorCheck: $colorKey;
@@ -385,8 +388,10 @@ $colorLoadingFg: #776ba2;
 $colorLoadingBg: rgba($colorLoadingFg, 0.1);
 
 // Transitions
-$transIn: all 50ms ease-in-out;
+$transInTime: 50ms;
-$transOut: all 250ms ease-in-out;
+$transOutTime: 250ms;
+$transIn: all $transInTime ease-in-out;
+$transOut: all $transOutTime ease-in-out;
 $transInBounce: all 200ms cubic-bezier(.47,.01,.25,1.5);
 $transInBounceBig: all 300ms cubic-bezier(.2,1.6,.6,3);
 

src/styles-new/_constants-maelstrom.scss

@@ -163,8 +163,8 @@ $editFrameBorderHov: 1px solid $editFrameColorHov; // Hover on selectable frames
 $editFrameColorSelected: #ccc; // Border of selected frames
 $editFrameColorHandleBg: $colorBodyBg; // Resize handle 'offset' color to make handle standout
 $editFrameColorHandleFg: $editFrameColorSelected; // Resize handle main color
-$editFrameSelectedShdw: rgba(black, 0.5) 0 1px 10px 1px;
+$editFrameSelectedShdw: rgba(black, 0.4) 0 1px 5px 1px;
-$editFrameSelectedBorder: 1px dashed $editFrameColorSelected; // Selected frame element
+$editFrameSelectedBorder: 1px solid $editFrameColorHov; // Selected frame element
 $editFrameMovebarColorBg: $editFrameColor; // Movebar bg color
 $editFrameMovebarColorFg: pullForward($editFrameMovebarColorBg, 20%);  // Grippy lines, container size text
 $editFrameHovMovebarColorBg: pullForward($editFrameMovebarColorBg, 10%); // Hover style
@@ -172,6 +172,7 @@ $editFrameHovMovebarColorFg: pullForward($editFrameMovebarColorFg, 10%);
 $editFrameSelectedMovebarColorBg: pullForward($editFrameMovebarColorBg, 15%); // Selected style
 $editFrameSelectedMovebarColorFg: pullForward($editFrameMovebarColorFg, 15%);
 $editFrameMovebarH: 10px; // Height of move bar in layout frame
+$editMarqueeBorder: 1px dashed $editFrameColorSelected;
 
 // Icons
 $colorIconAlias: #4af6f3;
@@ -228,6 +229,8 @@ $menuItemPad: $interiorMargin, floor($interiorMargin * 1.25);
 $paletteItemBorderOuterColorSelected: black;
 $paletteItemBorderInnerColorSelected: white;
 $paletteItemBorderInnerColor: rgba($paletteItemBorderOuterColorSelected, 0.3);
+$mixedSettingBg: (transparent rgba($editUIBaseColorHov, 0.7)); // Used in .c-click-icon--mixed
+$mixedSettingBgSize: 5px;
 
 // Forms
 $colorCheck: $colorKey;
@@ -389,8 +392,10 @@ $colorLoadingFg: #776ba2;
 $colorLoadingBg: rgba($colorLoadingFg, 0.1);
 
 // Transitions
-$transIn: all 50ms ease-in-out;
+$transInTime: 50ms;
-$transOut: all 250ms ease-in-out;
+$transOutTime: 250ms;
+$transIn: all $transInTime ease-in-out;
+$transOut: all $transOutTime ease-in-out;
 $transInBounce: all 200ms cubic-bezier(.47,.01,.25,1.5);
 $transInBounceBig: all 300ms cubic-bezier(.2,1.6,.6,3);
 

src/styles-new/_constants-snow.scss

@@ -159,8 +159,8 @@ $editFrameBorderHov: 1px solid $editFrameColorHov; // Hover on selectable frames
 $editFrameColorSelected: #333; // Border of selected frames
 $editFrameColorHandleBg: $colorBodyBg; // Resize handle 'offset' color to make handle standout
 $editFrameColorHandleFg: $editFrameColorSelected; // Resize handle main color
-$editFrameSelectedShdw: rgba(black, 0.5) 0 1px 10px 1px;
+$editFrameSelectedShdw: rgba(black, 0.4) 0 1px 5px 1px;
-$editFrameSelectedBorder: 1px dashed $editFrameColorSelected; // Selected frame element
+$editFrameSelectedBorder: 1px solid $editFrameColorHov; // Selected frame element
 $editFrameMovebarColorBg: $editFrameColor; // Movebar bg color
 $editFrameMovebarColorFg: pullForward($editFrameMovebarColorBg, 20%);  // Grippy lines, container size text
 $editFrameHovMovebarColorBg: pullForward($editFrameMovebarColorBg, 10%); // Hover style
@@ -168,6 +168,7 @@ $editFrameHovMovebarColorFg: pullForward($editFrameMovebarColorFg, 10%);
 $editFrameSelectedMovebarColorBg: pullForward($editFrameMovebarColorBg, 15%); // Selected style
 $editFrameSelectedMovebarColorFg: pullForward($editFrameMovebarColorFg, 15%);
 $editFrameMovebarH: 10px; // Height of move bar in layout frame
+$editMarqueeBorder: 1px dashed $editFrameColorSelected;
 
 // Icons
 $colorIconAlias: #4af6f3;
@@ -224,6 +225,8 @@ $menuItemPad: $interiorMargin, floor($interiorMargin * 1.25);
 $paletteItemBorderOuterColorSelected: black;
 $paletteItemBorderInnerColorSelected: white;
 $paletteItemBorderInnerColor: rgba($paletteItemBorderOuterColorSelected, 0.3);
+$mixedSettingBg: (transparent rgba($editUIBaseColorHov, 0.9)); // Used in .c-click-icon--mixed
+$mixedSettingBgSize: 10px;
 
 // Forms
 $colorCheck: $colorKey;
@@ -385,8 +388,10 @@ $colorLoadingFg: #776ba2;
 $colorLoadingBg: rgba($colorLoadingFg, 0.1);
 
 // Transitions
-$transIn: all 50ms ease-in-out;
+$transInTime: 50ms;
-$transOut: all 250ms ease-in-out;
+$transOutTime: 250ms;
+$transIn: all $transInTime ease-in-out;
+$transOut: all $transOutTime ease-in-out;
 $transInBounce: all 200ms cubic-bezier(.47,.01,.25,1.5);
 $transInBounceBig: all 300ms cubic-bezier(.2,1.6,.6,3);
 

src/styles-new/_controls.scss

@@ -85,6 +85,15 @@ button {
         margin-left: $interiorMargin;
     }
 
+    $c1: nth($mixedSettingBg, 1);
+    $c2: nth($mixedSettingBg, 2);
+    $mixedBgD: $mixedSettingBgSize $mixedSettingBgSize;
+
+    &--mixed {
+        // E.g. click-icons in toolbar that apply to multiple selected items with different settings
+        @include bgStripes2Color($c1, $c2, $bgSize: $mixedBgD);
+    }
+
     &--swatched {
         // Color control, show swatch element
         display: flex;
@@ -93,9 +102,9 @@ button {
         justify-content: center;
 
         > [class*='swatch'] {
-            box-shadow: inset rgba(black, 0.2) 0 0 1px;
+            box-shadow: inset rgba($editUIBaseColorFg, 0.2) 0 0 0 1px;
             flex: 0 0 auto;
-            height: 4px;
+            height: 5px;
             width: 100%;
             margin-top: 1px;
         }
@@ -105,6 +114,13 @@ button {
             flex: 1 1 auto;
             font-size: 1.1em;
         }
+
+        &--mixed {
+            // Styling for swatched buttons when settings are mixed
+            > [class*='swatch'] {
+                @include bgStripes2Color($c1, $c2, $bgSize: $mixedBgD);
+            }
+        }
     }
 }
 
@@ -569,6 +585,10 @@ select {
         margin-left: 2px;
     }
 
+    &__button {
+
+    }
+
     &__separator {
         @include cToolbarSeparator();
     }

src/styles-new/_mixins.scss

@@ -108,7 +108,7 @@
 }
 
 @mixin bgStripes($c: yellow, $a: 0.1, $bgsize: 5px, $angle: 90deg) {
-    background-image: linear-gradient($angle,
+    background: linear-gradient($angle,
         rgba($c, $a) 25%, transparent 25%,
         transparent 50%, rgba($c, $a) 50%,
         rgba($c, $a) 75%, transparent 75%,
@@ -117,6 +117,16 @@
     background-size: $bgsize $bgsize;
 }
 
+@mixin bgStripes2Color($c1, $c2, $bgSize, $angle: -45deg) {
+    background: linear-gradient(-45deg,
+            $c1 0%, $c1 25%,
+            $c2 25%, $c2 50%,
+            $c1 50%, $c1 75%,
+            $c2 75%, $c2 100%
+    ) repeat;
+    background-size: $bgSize;
+}
+
 @mixin disabled() {
     opacity: $controlDisabledOpacity;
     pointer-events: none !important;
@@ -564,7 +574,6 @@
 @mixin test($c: deeppink, $a: 0.3) {
     background: rgba($c, $a) !important;
     background-color: rgba($c, $a) !important;
-    box-shadow: deeppink 0 0 10px 1px !important;
 }
 
 

src/ui/components/ObjectFrame.vue

@@ -103,7 +103,7 @@
 
         &__local-controls {
             position: absolute;
-            top: 0; right: 0;
+            top: $interiorMargin; right: $interiorMargin;
             z-index: 2;
         }
 
@@ -112,7 +112,7 @@
         }
 
         &.has-complex-content {
-            .c-so-view__view-large { display: block; }
+            > .c-so-view__view-large { display: block; }
         }
 
         /*************************** OBJECT VIEW */

src/ui/inspector/Elements.vue

@@ -102,7 +102,8 @@ export default {
             this.elements = [];
             this.elementsCache = {};
             this.listeners = [];
-            this.parentObject = selection[0].context.item;
+            this.parentObject = selection && selection[0] && selection[0][0].context.item;
+
             if (this.mutationUnobserver) {
                 this.mutationUnobserver();
             }

src/ui/inspector/Inspector.vue

@@ -199,8 +199,8 @@
         },
         methods: {
             refreshComposition(selection) {
-                if (selection[0]) {
+                if (selection.length > 0 && selection[0].length > 0) {
-                    let parentObject = selection[0].context.item;
+                    let parentObject = selection[0][0].context.item;
 
                     this.hasComposition = !!(parentObject && this.openmct.composition.get(parentObject));
                 }

src/ui/inspector/InspectorViews.vue

@@ -13,7 +13,7 @@ import _ from 'lodash';
         inject: ['openmct'],
         mounted() {
             this.openmct.selection.on('change', this.updateSelection);
-            this.updateSelection();
+            this.updateSelection(this.openmct.selection.get());
         },
         destroyed() {
             this.openmct.selection.off('change', this.updateSelection);
@@ -24,12 +24,11 @@ import _ from 'lodash';
             }
         },
         methods: {
-            updateSelection() {
+            updateSelection(selection) {
-                let selection = this.openmct.selection.get();
+                if (_.isEqual(this.selection, selection)) {
-                
-                if (_.isEqual(this.selection[0], selection[0])) {
                     return;
                 }
+
                 this.selection = selection;
 
                 if (this.selectedViews) {
@@ -38,12 +37,14 @@ import _ from 'lodash';
                     });
                     this.$el.innerHTML = '';
                 }
-                this.viewContainers = [];
+
+                if (selection.length > 1) {
+                    return;
+                }
+
                 this.selectedViews = this.openmct.inspectorViews.get(selection);
                 this.selectedViews.forEach(selectedView => {
                     let viewContainer = document.createElement('div');
-                    this.viewContainers.push(viewContainer);
-
                     this.$el.append(viewContainer)
                     selectedView.show(viewContainer);
                 });

src/ui/inspector/Location.vue

@@ -1,7 +1,7 @@
 <template>
 <div class="c-properties c-properties--location">
     <div class="c-properties__header" title="The location of this linked object.">Original Location</div>
-    <ul class="c-properties__section">
+    <ul class="c-properties__section" v-if="!multiSelect">
         <li class="c-properties__row" v-if="originalPath.length">
             <ul class="c-properties__value c-location">
                 <li v-for="pathObject in orderedOriginalPath"
@@ -15,6 +15,7 @@
             </ul>
         </li>
     </ul>
+    <div class="c-properties__row--span-all" v-if="multiSelect">No location to display for multiple items</div>
 </div>
 </template>
 
@@ -72,6 +73,7 @@ export default {
     data() {
         return {
             domainObject: {},
+            multiSelect: false,
             originalPath: [],
             keyString: ''
         }
@@ -106,15 +108,26 @@ export default {
             this.keyString = '';
         },
         updateSelection(selection) {
-            if (!selection.length) {
+            if (!selection.length || !selection[0].length) {
                 this.clearData();
                 return;
-            } else if (!selection[0].context.item && selection[1] && selection[1].context.item) {
-                this.setOriginalPath([selection[1].context.item], true);
-                return;
             }  
 
-            this.domainObject = selection[0].context.item;
+            if (selection.length > 1) {
+                this.multiSelect = true;
+                return;
+            } else {
+                this.multiSelect = false;
+            }
+            
+            this.domainObject = selection[0][0].context.item;
+            let parentObject = selection[0][1];
+
+            if (!this.domainObject && parentObject && parentObject.context.item) {
+                this.setOriginalPath([parentObject.context.item], true);
+                this.keyString = '';
+                return;
+            }
 
             let keyString = this.openmct.objects.makeKeyString(this.domainObject.identifier);
 

src/ui/inspector/Properties.vue

@@ -1,7 +1,7 @@
 <template>
 <div class="c-properties c-properties--properties">
     <div class="c-properties__header">Properties</div>
-    <ul class="c-properties__section">
+    <ul class="c-properties__section" v-if="!multiSelect">
         <li class="c-properties__row">
             <div class="c-properties__label">Title</div>
             <div class="c-properties__value">{{ item.name }}</div>
@@ -25,6 +25,7 @@
             <div class="c-properties__value">{{ prop.value }}</div>
         </li>
     </ul>
+    <div class="c-properties__row--span-all" v-if="multiSelect">No properties to display for multiple items</div>
 </div>
 </template>
 
@@ -35,7 +36,8 @@ export default {
     inject: ['openmct'],
     data() {
         return {
-            domainObject: {}
+            domainObject: {},
+            multiSelect: false
         }
     },
     computed: {
@@ -90,11 +92,19 @@ export default {
     },
     methods: {
         updateSelection(selection) {
-            if (selection.length === 0) {
+            if (selection.length === 0 || selection[0].length === 0) {
                 this.domainObject = {};
                 return;
             }
-            this.domainObject = selection[0].context.item;
+
+            if (selection.length > 1) {
+                this.multiSelect = true;
+                this.domainObject = {};
+                return;
+            } else {
+                this.multiSelect = false;
+                this.domainObject = selection[0][0].context.item;
+            }            
         },
         formatTime(unixTime) {
             return Moment.utc(unixTime).format('YYYY-MM-DD[\n]HH:mm:ss') + ' UTC';

src/ui/layout/Layout.vue

@@ -348,7 +348,7 @@
             toggleHasToolbar(selection) {
                 let structure = undefined;
 
-                if (!selection[0]) {
+                if (!selection || !selection[0]) {
                     structure = [];
                 } else {
                     structure = this.openmct.toolbars.get(selection);

src/ui/toolbar/Toolbar.vue

@@ -42,14 +42,13 @@
                 this.removeListeners();
                 this.domainObjectsById = {};
 
-                if (!selection[0]) {
+                if (selection.length === 0 || !selection[0][0]) {
                     this.structure = [];
                     return;
                 }
 
                 let structure = this.openmct.toolbars.get(selection) || [];
-                this.structure = structure.map(item => {
+                this.structure = structure.map(toolbarItem => {
-                    let toolbarItem = {...item};
                     let domainObject = toolbarItem.domainObject;
                     let formKeys = [];
                     toolbarItem.control = "toolbar-" + toolbarItem.control;
@@ -64,12 +63,7 @@
                     }
 
                     if (domainObject) {
-                        if (formKeys.length > 0) {
+                        toolbarItem.value = this.getValue(domainObject, toolbarItem);
-                            toolbarItem.value = this.getFormValue(domainObject, toolbarItem);
-                        } else {
-                            toolbarItem.value = _.get(domainObject, this.getItemProperty(item));
-                        }
-
                         this.registerListener(domainObject);
                     }
 
@@ -89,21 +83,12 @@
             observeObject(domainObject, id) {
                 let unobserveObject = this.openmct.objects.observe(domainObject, '*', function(newObject) {
                     this.domainObjectsById[id].newObject = JSON.parse(JSON.stringify(newObject));
-                    this.scheduleToolbarUpdate();
+                    this.updateToolbarAfterMutation();
                 }.bind(this));
                 this.unObserveObjects.push(unobserveObject);
             },
-            scheduleToolbarUpdate() {
-                if (this.toolbarUpdateScheduled) {
-                    return;
-                }
-
-                this.toolbarUpdateScheduled = true;
-                setTimeout(this.updateToolbarAfterMutation.bind(this));
-            },
             updateToolbarAfterMutation() {
-                this.structure = this.structure.map(item => {
+                this.structure = this.structure.map(toolbarItem => {
-                    let toolbarItem = {...item};
                     let domainObject = toolbarItem.domainObject;
 
                     if (domainObject) {
@@ -112,12 +97,7 @@
 
                         if (newObject) {
                             toolbarItem.domainObject = newObject;
-
+                            toolbarItem.value = this.getValue(newObject, toolbarItem);
-                            if (toolbarItem.formKeys) {
-                                toolbarItem.value = this.getFormValue(newObject, toolbarItem);
-                            } else {
-                                toolbarItem.value = _.get(newObject, this.getItemProperty(item));
-                            }
                         }
                     }
 
@@ -130,17 +110,58 @@
                         delete tracker.newObject;
                     }
                 });
-                this.toolbarUpdateScheduled = false;
+            },
+            getValue(domainObject, toolbarItem) {
+                let value = undefined;
+                let applicableSelectedItems = toolbarItem.applicableSelectedItems;
+
+                if (!applicableSelectedItems) {
+                    return value;
+                }
+
+                if (toolbarItem.formKeys) {
+                    value = this.getFormValue(domainObject, toolbarItem);
+                } else {
+                    let values = [];
+                    applicableSelectedItems.forEach(selectionPath => {
+                        values.push(_.get(domainObject, this.getItemProperty(toolbarItem, selectionPath)));
+                    });
+
+                    // If all values are the same, use it, otherwise mark the item as non-specific.
+                    if (values.every(value => value === values[0])) {
+                        value = values[0];
+                        toolbarItem.nonSpecific = false;
+                    } else {
+                        toolbarItem.nonSpecific = true;
+                    }
+                }
+
+                return value;
             },
             getFormValue(domainObject, toolbarItem) {
                 let value = {};
+                let values = {};
                 toolbarItem.formKeys.map(key => {
-                    value[key] = _.get(domainObject, this.getItemProperty(toolbarItem) + "." + key);
+                    values[key] = [];
+                    toolbarItem.applicableSelectedItems.forEach(selectionPath => {
+                        values[key].push(_.get(domainObject, this.getItemProperty(toolbarItem, selectionPath) + "." + key));
                     });
+                });
+
+                for (const key in values) {
+                    if (values[key].every(value => value === values[key][0])) {
+                        value[key] = values[key][0];
+                        toolbarItem.nonSpecific = false;
+                    } else {
+                        toolbarItem.nonSpecific = true;
+                        return {};
+                    }
+                }
+
                 return value;
             },
-            getItemProperty(item) {
+            getItemProperty(item, selectionPath) {
-                return (typeof item.property === "function") ? item.property() : item.property;
+                return (typeof item.property === "function") ? item.property(selectionPath) : item.property;
             },
             removeListeners() {
                 if (this.unObserveObjects) {
@@ -152,14 +173,12 @@
             },
             updateObjectValue(value, item) {
                 let changedItemId = this.openmct.objects.makeKeyString(item.domainObject.identifier);
-                this.structure = this.structure.map((s) => {
-                    let toolbarItem = {...s};
-                    let domainObject = toolbarItem.domainObject;
 
-                    if (domainObject) {
+                this.structure = this.structure.map(toolbarItem => {
-                        let id = this.openmct.objects.makeKeyString(domainObject.identifier);
+                    if (toolbarItem.domainObject) {
+                        let id = this.openmct.objects.makeKeyString(toolbarItem.domainObject.identifier);
 
-                        if (changedItemId === id && this.getItemProperty(item) === this.getItemProperty(s)) {
+                        if (changedItemId === id && _.isEqual(toolbarItem, item)) {
                             toolbarItem.value = value;
                         }
                     }
@@ -173,12 +192,17 @@
                     this.structure.map(s => {
                         if (s.formKeys) {
                             s.formKeys.forEach(key => {
-                                this.openmct.objects.mutate(item.domainObject, this.getItemProperty(item) + "." + key, value[key]);
+                                item.applicableSelectedItems.forEach(selectionPath => {
+                                    this.openmct.objects.mutate(item.domainObject,
+                                        this.getItemProperty(item, selectionPath) + "." + key, value[key]);
+                                });
                             });
                         }
                     });
                 } else {
-                    this.openmct.objects.mutate(item.domainObject, this.getItemProperty(item), value);
+                    item.applicableSelectedItems.forEach(selectionPath => {
+                        this.openmct.objects.mutate(item.domainObject, this.getItemProperty(item, selectionPath), value);    
+                    });
                 }
             },
             triggerMethod(item, event) {

src/ui/toolbar/components/toolbar-button.vue

@@ -4,14 +4,14 @@
             :title="options.title"
             :class="{
                 [options.icon]: true,
-                'c-icon-button--caution': options.modifier === 'caution'
+                'c-icon-button--caution': options.modifier === 'caution',
+                'c-icon-button--mixed': nonSpecific
             }"
             @click="onClick">
             <div class="c-icon-button__label"
                  v-if="options.label">
                 {{ options.label }}
             </div>
-
         </div>
     </div>
 </template>
@@ -22,6 +22,11 @@ export default {
     props: {
         options: Object
     },
+    computed: {
+        nonSpecific() {
+            return this.options.nonSpecific === true;
+        }
+    },
     methods: {
         onClick(event) {
             if (this.options.dialog) {

src/ui/toolbar/components/toolbar-color-picker.vue

@@ -1,7 +1,7 @@
 <template>
     <div class="c-ctrl-wrapper">
         <div class="c-icon-button c-icon-button--swatched"
-             :class="options.icon"
+             :class="[options.icon, {'c-icon-button--mixed': nonSpecific}]"
              :title="options.title"
              @click="toggle">
             <div class="c-swatch" :style="{
@@ -36,6 +36,11 @@ export default {
     props: {
         options: Object
     },
+    computed: {
+        nonSpecific() {
+            return this.options.nonSpecific === true;
+        }
+    },
     methods: {
         select(color) {
             if (color.value !== this.options.value) {

src/ui/toolbar/components/toolbar-select-menu.vue

@@ -1,7 +1,7 @@
 <template>
     <div class="c-ctrl-wrapper">
         <div class="c-icon-button c-icon-button--menu"
-             :class="options.icon"
+             :class="[options.icon, {'c-click-icon--mixed': nonSpecific}]"
              :title="options.title"
              @click="toggle">
             <div class="c-button__label">{{ selectedName }}</div>
@@ -47,7 +47,11 @@ export default {
             if (selectedOption) {
                 return selectedOption.name || selectedOption.value
             }
-            return '';
+            // If no selected option, then options are non-specific
+            return '??px';
+        },
+        nonSpecific() {
+            return this.options.nonSpecific === true;
         }
     }
 }

src/ui/toolbar/components/toolbar-toggle-button.vue

@@ -2,7 +2,7 @@
     <div class="c-ctrl-wrapper">
         <div class="c-icon-button"
              :title="nextValue.title"
-             :class="nextValue.icon"
+             :class="[nextValue.icon, {'c-click-icon--mixed': nonSpecific}]"
              @click="cycle">
         </div>
     </div>
@@ -23,6 +23,9 @@ export default {
                 nextIndex = 0;
             }
             return this.options.options[nextIndex];
+        },
+        nonSpecific() {
+            return this.options.nonSpecific === true;
         }
     },
     methods: {