From f67f03af47ac4d2e22e8cca7ccb39a0dff14ea96 Mon Sep 17 00:00:00 2001
From: Pete Richards <peter.l.richards@nasa.gov>
Date: Wed, 15 Aug 2018 12:43:32 -0700
Subject: [PATCH] new multipane

---
 src/ui/components/controls/multipane.vue | 88 ++++++++++++++++++++++++
 src/ui/components/controls/pane.vue      | 71 +++++++++++++++++++
 2 files changed, 159 insertions(+)
 create mode 100644 src/ui/components/controls/multipane.vue
 create mode 100644 src/ui/components/controls/pane.vue

diff --git a/src/ui/components/controls/multipane.vue b/src/ui/components/controls/multipane.vue
new file mode 100644
index 0000000000..24f4c0e22a
--- /dev/null
+++ b/src/ui/components/controls/multipane.vue
@@ -0,0 +1,88 @@
+<template>
+    <div class="multipane"
+         :class="{
+             'multipane--vertical': type === 'vertical',
+             'multipane--horizontal': type === 'horizontal'
+         }">
+        <slot></slot>
+    </div>
+</template>
+
+<style lang="scss">
+.multipane {
+    $backgroundColor: #06f;
+    $size: 10px;
+
+    & > .multipane__pane > .multipane__splitter {
+        z-index: 1;
+        display: block;
+        background: #ccc;
+        position: absolute;
+
+        &:before {
+            content: '';
+        }
+
+        &:hover {
+            background: rgba($backgroundColor, 0.3);
+            &:before {
+                background: $backgroundColor;
+            }
+        }
+    }
+
+    &--horizontal > .multipane__pane > .multipane__splitter {
+        cursor: col-resize;
+        width: $size;
+        top: 0px;
+        bottom: 0px;
+        &--before {
+            left: (- $size / 2);
+        }
+        &--after {
+            right: (- $size / 2);
+        }
+        &:before {
+            // Divider line
+            width: 1px;
+            height: 100%;
+            left: 50%;
+            transform: translateX(-50%);
+        }
+    }
+
+    &--vertical > .multipane__pane > .multipane__splitter {
+        cursor: row-resize;
+        height: $size;
+        left: 0px;
+        right: 0px;
+        &--before {
+            top: (- $size / 2);
+        }
+        &--after {
+            left: (- $size / 2);
+        }
+
+        &:before {
+            // Divider line
+            width: 100%;
+            height: 1px;
+            top: 50%;
+            transform: translateY(-50%);
+        }
+    }
+}
+</style>
+
+<script>
+export default {
+    props: {
+        type: {
+            type: String,
+            validator: function (value) {
+                return ['vertical', 'horizontal'].indexOf(value) !== -1;
+            }
+        }
+    }
+}
+</script>
diff --git a/src/ui/components/controls/pane.vue b/src/ui/components/controls/pane.vue
new file mode 100644
index 0000000000..5e4f0d6689
--- /dev/null
+++ b/src/ui/components/controls/pane.vue
@@ -0,0 +1,71 @@
+<template>
+    <div class="multipane__pane">
+         <div v-if="splitter"
+              class="multipane__splitter"
+              :class="{
+                  'multipane__splitter--before': splitter === 'before',
+                  'multipane__splitter--after': splitter === 'after',
+              }"
+              @mousedown="start"
+              ></div>
+         <slot></slot>
+    </div>
+</template>
+
+<script>
+export default {
+    props: {
+        splitter: {
+            type: String,
+            validator: function (value) {
+                return ['before', 'after'].indexOf(value) !== -1;
+            }
+        }
+    },
+    mounted() {
+        this.type = this.$parent.type;
+        this.trackSize();
+    },
+    methods: {
+        trackSize: function() {
+            if (this.type === 'vertical') {
+                this.initial = this.$el.offsetHeight;
+            } else if (this.type === 'horizontal') {
+                this.initial = this.$el.offsetWidth;
+            }
+        },
+        getPosition: function (event) {
+            return this.type === 'horizontal' ?
+                event.pageX :
+                event.pageY;
+        },
+        getNewSize: function (event) {
+            let delta = this.startPosition - this.getPosition(event);
+            if (this.splitter === "before") {
+                return `${this.initial + delta}px`;
+            }
+            if (this.splitter === "after") {
+                return `${this.initial - delta}px`;
+            }
+        },
+        updatePosition: function (event) {
+            let size = this.getNewSize(event);
+            if (this.type === 'horizontal') {
+                this.$el.style.width = size;
+            } else {
+                this.$el.style.height = size;
+            }
+        },
+        start: function (event) {
+            this.startPosition = this.getPosition(event);
+            document.body.addEventListener('mousemove', this.updatePosition);
+            document.body.addEventListener('mouseup', this.end);
+        },
+        end: function (event) {
+            document.body.removeEventListener('mousemove', this.updatePosition);
+            document.body.removeEventListener('mouseup', this.end);
+            this.trackSize();
+        }
+    }
+}
+</script>