ExternalVendorCode/openmct
1
0
Fork 0
mirror of https://github.com/nasa/openmct.git synced 2025-05-29 21:54:20 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[Scrolling] Bring in scrolling list view

Browse Source 
Bring in scrolling list view from the sandbox branch
in preparation for clean up, testing, and integration
to complete transition of scrolling list views,
WTD-534.
This commit is contained in:
Victor Woeltjen 2014-12-02 14:51:48 -08:00
parent 622f1f8be7
commit d304cc4343
6 changed files with 313 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
platform/features/scrolling/bundle.json Normal file
View File

@ -0,0 +1,24 @@
{
"name": "Scrolling Lists",
"description": "Time-ordered list of latest data.",
"extensions": {
"views": [
{
"key": "scrolling",
"name": "Scrolling",
"description": "Scrolling list of data values.",
"templateUrl": "templates/scrolling.html",
"needs": [ "telemetry" ],
"delegation": true
}
],
"controllers": [
{
"key": "ScrollingListController",
"implementation": "ScrollingListController.js",
"depends": [ "$scope" ]
}
]
}
}

25
platform/features/scrolling/res/templates/scrolling.html Normal file
View File

@ -0,0 +1,25 @@
<div class="w1" ng-controller="TelemetryController as telemetry">
<!-- Dynamically set height based on number of rows desired. In current CSS, each row occupies 18px -->
<div class="w2"
ng-style="{ height: rows.length * 18 + 'px' }"
ng-controller="ScrollingListController">
<div class="tabular">
<div class="tr header">
<!-- Enable sorting by binding click handlers to the <em> element in each <th>. Note that CSS classes must be added dynamically to the current <th> that is sorting. For example, if sorting by ID: <div class="th sort asc"> or <div class="th sort desc">. -->
<div class="th" ng-repeat="header in headers">
<em>{{header}}</em>{{header}}
</div>
</div>
<div class="tr" ng-repeat="row in rows">
<div class="td" ng-repeat="cell in row">
{{cell}}
</div>
</div>
</div>
</div>
</div>

31
platform/features/scrolling/src/DomainColumn.js Normal file
View File

@ -0,0 +1,31 @@
/*global define,Promise*/
/**
* Module defining DomainColumn. Created by vwoeltje on 11/18/14.
*/
define(
[],
function () {
"use strict";
/**
*
* @constructor
*/
function DomainColumn(domainMetadata) {
return {
getTitle: function () {
return domainMetadata.name;
},
getValue: function (domainObject, data, index) {
return data.getDomainValue(
index,
domainMetadata.key
);
}
};
}
return DomainColumn;
}
);

28
platform/features/scrolling/src/NameColumn.js Normal file
View File

@ -0,0 +1,28 @@
/*global define,Promise*/
/**
* Module defining NameColumn. Created by vwoeltje on 11/18/14.
*/
define(
[],
function () {
"use strict";
/**
*
* @constructor
*/
function NameColumn() {
return {
getTitle: function () {
return "Name";
},
getValue: function (domainObject) {
return domainObject.getModel().name;
}
};
}
return NameColumn;
}
);

31
platform/features/scrolling/src/RangeColumn.js Normal file
View File

@ -0,0 +1,31 @@
/*global define,Promise*/
/**
* Module defining DomainColumn. Created by vwoeltje on 11/18/14.
*/
define(
[],
function () {
"use strict";
/**
*
* @constructor
*/
function RangeColumn(rangeMetadata) {
return {
getTitle: function () {
return rangeMetadata.name;
},
getValue: function (domainObject, data, index) {
return data.getRangeValue(
index,
rangeMetadata.key
);
}
};
}
return RangeColumn;
}
);

174
platform/features/scrolling/src/ScrollingListController.js Normal file
View File

@ -0,0 +1,174 @@
/*global define,Promise*/
/**
* Module defining ListController. Created by vwoeltje on 11/18/14.
*/
define(
["./NameColumn", "./DomainColumn", "./RangeColumn"],
function (NameColumn, DomainColumn, RangeColumn) {
"use strict";
var ROW_COUNT = 18;
/**
*
* @constructor
*/
function ScrollingListController($scope) {
var columns = []; // Domain used
/**
* Look up the most recent values from a set of data objects.
* Returns an array of objects in the order in which data
* should be displayed; each element is an object with
* two properties:
*
* * objectIndex: The index of the domain object associated
* with the data point to be displayed in that
* row.
* * pointIndex: The index of the data point itself, within
* its data set.
*
* @param {Array<Telemetry>} datas an array of the most recent
* data objects; expected to be in the same order
* as the domain objects provided at constructor
* @param {Array<ScrollingColumn}
*/
function getLatestDataValues(datas) {
var latest = [],
candidate,
candidateTime,
used = datas.map(function () { return 0; });
// This algorithm is O(nk) for n rows and k telemetry elements;
// one O(k) linear search for a max is made for each of n rows.
// This could be done in O(n lg k + k lg k), using a priority
// queue (where priority is max-finding) containing k initial
// values. For n rows, pop the max from the queue and replenish
// the queue with a value from the data at the same
// objectIndex, if available.
// But k is small, so this might not give an observable
// improvement in performance.
// Find the most recent unused data point (this will be used
// in a loop to find and the N most recent data points)
function findCandidate(data, i) {
var nextTime,
pointCount = data.getPointCount(),
pointIndex = pointCount - used[i] - 1;
if (data && pointIndex >= 0) {
nextTime = data.getDomainValue(pointIndex);
if (nextTime > candidateTime) {
candidateTime = nextTime;
candidate = {
objectIndex: i,
pointIndex: pointIndex
};
}
}
}
// Assemble a list of the most recent data points
while (latest.length < ROW_COUNT) {
// Reset variables pre-search
candidateTime = Number.NEGATIVE_INFINITY;
candidate = undefined;
// Linear search for most recent
datas.forEach(findCandidate);
if (candidate) {
// Record this data point - it is the most recent
latest.push(candidate);
// Track the data points used so we can look farther back
// in the data set on the next iteration
used[candidate.objectIndex] = used[candidate.objectIndex] + 1;
} else {
break; // Ran out of candidates; not enough data points available
}
}
return latest;
}
function getRows(telemetry) {
var datas = telemetry.getResponse(),
objects = telemetry.getTelemetryObjects(),
values = getLatestDataValues(datas);
return values.map(function (value) {
return columns.map(function (column) {
return column.getValue(
objects[value.objectIndex],
datas[value.objectIndex],
value.pointIndex
);
});
});
}
function updateRows() {
var telemetry = $scope.telemetry;
$scope.rows = telemetry ? getRows(telemetry) : [];
}
function setupColumns() {
var telemetry = $scope.telemetry,
domainKeys = {},
rangeKeys = {},
metadata;
function addDomain(domain) {
var key = domain.key;
if (key && !domainKeys[key]) {
columns.push(new DomainColumn(domain));
}
}
function addRange(range) {
var key = range.key;
if (key && !rangeKeys[key]) {
columns.push(new RangeColumn(range));
}
}
if (!telemetry) {
columns = [];
$scope.rows = [];
$scope.headers = [];
return;
}
columns = [ new NameColumn() ];
// Add domain, range columns
metadata = telemetry.getMetadata();
(metadata || []).forEach(function (metadata) {
(metadata.domains || []).forEach(addDomain);
(metadata.ranges || []).forEach(addRange);
});
// Add default domain, range columns if none
// were described in metadata.
if (Object.keys(domainKeys).length < 1) {
columns.push(new DomainColumn({ name: "Time" }));
}
if (Object.keys(rangeKeys).length < 1) {
columns.push(new RangeColumn({ name: "Value" }));
}
$scope.headers = columns.map(function (column) {
return column.getTitle();
});
updateRows();
}
$scope.$on("telemetryUpdate", updateRows);
$scope.$watch("telemetry", setupColumns);
}
return ScrollingListController;
}
);