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Viewer.js
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Viewer.js
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import BoundingSphere from "../../Core/BoundingSphere.js";
import Cartesian3 from "../../Core/Cartesian3.js";
import Cartographic from "../../Core/Cartographic.js";
import Clock from "../../Core/Clock.js";
import defaultValue from "../../Core/defaultValue.js";
import defined from "../../Core/defined.js";
import destroyObject from "../../Core/destroyObject.js";
import DeveloperError from "../../Core/DeveloperError.js";
import Event from "../../Core/Event.js";
import EventHelper from "../../Core/EventHelper.js";
import HeadingPitchRange from "../../Core/HeadingPitchRange.js";
import Matrix4 from "../../Core/Matrix4.js";
import ScreenSpaceEventType from "../../Core/ScreenSpaceEventType.js";
import BoundingSphereState from "../../DataSources/BoundingSphereState.js";
import ConstantPositionProperty from "../../DataSources/ConstantPositionProperty.js";
import DataSourceCollection from "../../DataSources/DataSourceCollection.js";
import DataSourceDisplay from "../../DataSources/DataSourceDisplay.js";
import Entity from "../../DataSources/Entity.js";
import EntityView from "../../DataSources/EntityView.js";
import Property from "../../DataSources/Property.js";
import Cesium3DTileset from "../../Scene/Cesium3DTileset.js";
import computeFlyToLocationForRectangle from "../../Scene/computeFlyToLocationForRectangle.js";
import ImageryLayer from "../../Scene/ImageryLayer.js";
import SceneMode from "../../Scene/SceneMode.js";
import TimeDynamicPointCloud from "../../Scene/TimeDynamicPointCloud.js";
import knockout from "../../ThirdParty/knockout.js";
import when from "../../ThirdParty/when.js";
import Animation from "../Animation/Animation.js";
import AnimationViewModel from "../Animation/AnimationViewModel.js";
import BaseLayerPicker from "../BaseLayerPicker/BaseLayerPicker.js";
import createDefaultImageryProviderViewModels from "../BaseLayerPicker/createDefaultImageryProviderViewModels.js";
import createDefaultTerrainProviderViewModels from "../BaseLayerPicker/createDefaultTerrainProviderViewModels.js";
import CesiumWidget from "../CesiumWidget/CesiumWidget.js";
import ClockViewModel from "../ClockViewModel.js";
import FullscreenButton from "../FullscreenButton/FullscreenButton.js";
import Geocoder from "../Geocoder/Geocoder.js";
import getElement from "../getElement.js";
import HomeButton from "../HomeButton/HomeButton.js";
import InfoBox from "../InfoBox/InfoBox.js";
import NavigationHelpButton from "../NavigationHelpButton/NavigationHelpButton.js";
import ProjectionPicker from "../ProjectionPicker/ProjectionPicker.js";
import SceneModePicker from "../SceneModePicker/SceneModePicker.js";
import SelectionIndicator from "../SelectionIndicator/SelectionIndicator.js";
import subscribeAndEvaluate from "../subscribeAndEvaluate.js";
import Timeline from "../Timeline/Timeline.js";
import VRButton from "../VRButton/VRButton.js";
import Cesium3DTileFeature from "../../Scene/Cesium3DTileFeature.js";
var boundingSphereScratch = new BoundingSphere();
function onTimelineScrubfunction(e) {
var clock = e.clock;
clock.currentTime = e.timeJulian;
clock.shouldAnimate = false;
}
function getCesium3DTileFeatureDescription(feature) {
var propertyNames = feature.getPropertyNames();
var html = "";
propertyNames.forEach(function (propertyName) {
var value = feature.getProperty(propertyName);
if (defined(value)) {
html += "<tr><th>" + propertyName + "</th><td>" + value + "</td></tr>";
}
});
if (html.length > 0) {
html =
'<table class="cesium-infoBox-defaultTable"><tbody>' +
html +
"</tbody></table>";
}
return html;
}
function getCesium3DTileFeatureName(feature) {
// We need to iterate all property names to find potential
// candidates, but since we prefer some property names
// over others, we store them in an indexed array
// and then use the first defined element in the array
// as the preferred choice.
var i;
var possibleNames = [];
var propertyNames = feature.getPropertyNames();
for (i = 0; i < propertyNames.length; i++) {
var propertyName = propertyNames[i];
if (/^name$/i.test(propertyName)) {
possibleNames[0] = feature.getProperty(propertyName);
} else if (/name/i.test(propertyName)) {
possibleNames[1] = feature.getProperty(propertyName);
} else if (/^title$/i.test(propertyName)) {
possibleNames[2] = feature.getProperty(propertyName);
} else if (/^(id|identifier)$/i.test(propertyName)) {
possibleNames[3] = feature.getProperty(propertyName);
} else if (/element/i.test(propertyName)) {
possibleNames[4] = feature.getProperty(propertyName);
} else if (/(id|identifier)$/i.test(propertyName)) {
possibleNames[5] = feature.getProperty(propertyName);
}
}
var length = possibleNames.length;
for (i = 0; i < length; i++) {
var item = possibleNames[i];
if (defined(item) && item !== "") {
return item;
}
}
return "Unnamed Feature";
}
function pickEntity(viewer, e) {
var picked = viewer.scene.pick(e.position);
if (defined(picked)) {
var id = defaultValue(picked.id, picked.primitive.id);
if (id instanceof Entity) {
return id;
}
if (picked instanceof Cesium3DTileFeature) {
return new Entity({
name: getCesium3DTileFeatureName(picked),
description: getCesium3DTileFeatureDescription(picked),
feature: picked,
});
}
}
// No regular entity picked. Try picking features from imagery layers.
if (defined(viewer.scene.globe)) {
return pickImageryLayerFeature(viewer, e.position);
}
}
function trackDataSourceClock(timeline, clock, dataSource) {
if (defined(dataSource)) {
var dataSourceClock = dataSource.clock;
if (defined(dataSourceClock)) {
dataSourceClock.getValue(clock);
if (defined(timeline)) {
timeline.updateFromClock();
timeline.zoomTo(dataSourceClock.startTime, dataSourceClock.stopTime);
}
}
}
}
var cartesian3Scratch = new Cartesian3();
function pickImageryLayerFeature(viewer, windowPosition) {
var scene = viewer.scene;
var pickRay = scene.camera.getPickRay(windowPosition);
var imageryLayerFeaturePromise = scene.imageryLayers.pickImageryLayerFeatures(
pickRay,
scene
);
if (!defined(imageryLayerFeaturePromise)) {
return;
}
// Imagery layer feature picking is asynchronous, so put up a message while loading.
var loadingMessage = new Entity({
id: "Loading...",
description: "Loading feature information...",
});
when(
imageryLayerFeaturePromise,
function (features) {
// Has this async pick been superseded by a later one?
if (viewer.selectedEntity !== loadingMessage) {
return;
}
if (!defined(features) || features.length === 0) {
viewer.selectedEntity = createNoFeaturesEntity();
return;
}
// Select the first feature.
var feature = features[0];
var entity = new Entity({
id: feature.name,
description: feature.description,
});
if (defined(feature.position)) {
var ecfPosition = viewer.scene.globe.ellipsoid.cartographicToCartesian(
feature.position,
cartesian3Scratch
);
entity.position = new ConstantPositionProperty(ecfPosition);
}
viewer.selectedEntity = entity;
},
function () {
// Has this async pick been superseded by a later one?
if (viewer.selectedEntity !== loadingMessage) {
return;
}
viewer.selectedEntity = createNoFeaturesEntity();
}
);
return loadingMessage;
}
function createNoFeaturesEntity() {
return new Entity({
id: "None",
description: "No features found.",
});
}
function enableVRUI(viewer, enabled) {
var geocoder = viewer._geocoder;
var homeButton = viewer._homeButton;
var sceneModePicker = viewer._sceneModePicker;
var projectionPicker = viewer._projectionPicker;
var baseLayerPicker = viewer._baseLayerPicker;
var animation = viewer._animation;
var timeline = viewer._timeline;
var fullscreenButton = viewer._fullscreenButton;
var infoBox = viewer._infoBox;
var selectionIndicator = viewer._selectionIndicator;
var visibility = enabled ? "hidden" : "visible";
if (defined(geocoder)) {
geocoder.container.style.visibility = visibility;
}
if (defined(homeButton)) {
homeButton.container.style.visibility = visibility;
}
if (defined(sceneModePicker)) {
sceneModePicker.container.style.visibility = visibility;
}
if (defined(projectionPicker)) {
projectionPicker.container.style.visibility = visibility;
}
if (defined(baseLayerPicker)) {
baseLayerPicker.container.style.visibility = visibility;
}
if (defined(animation)) {
animation.container.style.visibility = visibility;
}
if (defined(timeline)) {
timeline.container.style.visibility = visibility;
}
if (
defined(fullscreenButton) &&
fullscreenButton.viewModel.isFullscreenEnabled
) {
fullscreenButton.container.style.visibility = visibility;
}
if (defined(infoBox)) {
infoBox.container.style.visibility = visibility;
}
if (defined(selectionIndicator)) {
selectionIndicator.container.style.visibility = visibility;
}
if (viewer._container) {
var right =
enabled || !defined(fullscreenButton)
? 0
: fullscreenButton.container.clientWidth;
viewer._vrButton.container.style.right = right + "px";
viewer.forceResize();
}
}
/**
* @typedef {Object} Viewer.ConstructorOptions
*
* Initialization options for the Viewer constructor
*
* @property {Boolean} [animation=true] If set to false, the Animation widget will not be created.
* @property {Boolean} [baseLayerPicker=true] If set to false, the BaseLayerPicker widget will not be created.
* @property {Boolean} [fullscreenButton=true] If set to false, the FullscreenButton widget will not be created.
* @property {Boolean} [vrButton=false] If set to true, the VRButton widget will be created.
* @property {Boolean|GeocoderService[]} [geocoder=true] If set to false, the Geocoder widget will not be created.
* @property {Boolean} [homeButton=true] If set to false, the HomeButton widget will not be created.
* @property {Boolean} [infoBox=true] If set to false, the InfoBox widget will not be created.
* @property {Boolean} [sceneModePicker=true] If set to false, the SceneModePicker widget will not be created.
* @property {Boolean} [selectionIndicator=true] If set to false, the SelectionIndicator widget will not be created.
* @property {Boolean} [timeline=true] If set to false, the Timeline widget will not be created.
* @property {Boolean} [navigationHelpButton=true] If set to false, the navigation help button will not be created.
* @property {Boolean} [navigationInstructionsInitiallyVisible=true] True if the navigation instructions should initially be visible, or false if the should not be shown until the user explicitly clicks the button.
* @property {Boolean} [scene3DOnly=false] When <code>true</code>, each geometry instance will only be rendered in 3D to save GPU memory.
* @property {Boolean} [shouldAnimate=false] <code>true</code> if the clock should attempt to advance simulation time by default, <code>false</code> otherwise. This option takes precedence over setting {@link Viewer#clockViewModel}.
* @property {ClockViewModel} [clockViewModel=new ClockViewModel(clock)] The clock view model to use to control current time.
* @property {ProviderViewModel} [selectedImageryProviderViewModel] The view model for the current base imagery layer, if not supplied the first available base layer is used. This value is only valid if `baseLayerPicker` is set to true.
* @property {ProviderViewModel[]} [imageryProviderViewModels=createDefaultImageryProviderViewModels()] The array of ProviderViewModels to be selectable from the BaseLayerPicker. This value is only valid if `baseLayerPicker` is set to true.
* @property {ProviderViewModel} [selectedTerrainProviderViewModel] The view model for the current base terrain layer, if not supplied the first available base layer is used. This value is only valid if `baseLayerPicker` is set to true.
* @property {ProviderViewModel[]} [terrainProviderViewModels=createDefaultTerrainProviderViewModels()] The array of ProviderViewModels to be selectable from the BaseLayerPicker. This value is only valid if `baseLayerPicker` is set to true.
* @property {ImageryProvider} [imageryProvider=createWorldImagery()] The imagery provider to use. This value is only valid if `baseLayerPicker` is set to false.
* @property {TerrainProvider} [terrainProvider=new EllipsoidTerrainProvider()] The terrain provider to use
* @property {SkyBox|false} [skyBox] The skybox used to render the stars. When <code>undefined</code>, the default stars are used. If set to <code>false</code>, no skyBox, Sun, or Moon will be added.
* @property {SkyAtmosphere|false} [skyAtmosphere] Blue sky, and the glow around the Earth's limb. Set to <code>false</code> to turn it off.
* @property {Element|String} [fullscreenElement=document.body] The element or id to be placed into fullscreen mode when the full screen button is pressed.
* @property {Boolean} [useDefaultRenderLoop=true] True if this widget should control the render loop, false otherwise.
* @property {Number} [targetFrameRate] The target frame rate when using the default render loop.
* @property {Boolean} [showRenderLoopErrors=true] If true, this widget will automatically display an HTML panel to the user containing the error, if a render loop error occurs.
* @property {Boolean} [useBrowserRecommendedResolution=true] If true, render at the browser's recommended resolution and ignore <code>window.devicePixelRatio</code>.
* @property {Boolean} [automaticallyTrackDataSourceClocks=true] If true, this widget will automatically track the clock settings of newly added DataSources, updating if the DataSource's clock changes. Set this to false if you want to configure the clock independently.
* @property {Object} [contextOptions] Context and WebGL creation properties corresponding to <code>options</code> passed to {@link Scene}.
* @property {SceneMode} [sceneMode=SceneMode.SCENE3D] The initial scene mode.
* @property {MapProjection} [mapProjection=new GeographicProjection()] The map projection to use in 2D and Columbus View modes.
* @property {Globe|false} [globe=new Globe(mapProjection.ellipsoid)] The globe to use in the scene. If set to <code>false</code>, no globe will be added.
* @property {Boolean} [orderIndependentTranslucency=true] If true and the configuration supports it, use order independent translucency.
* @property {Element|String} [creditContainer] The DOM element or ID that will contain the {@link CreditDisplay}. If not specified, the credits are added to the bottom of the widget itself.
* @property {Element|String} [creditViewport] The DOM element or ID that will contain the credit pop up created by the {@link CreditDisplay}. If not specified, it will appear over the widget itself.
* @property {DataSourceCollection} [dataSources=new DataSourceCollection()] The collection of data sources visualized by the widget. If this parameter is provided,
* the instance is assumed to be owned by the caller and will not be destroyed when the viewer is destroyed.
* @property {Number} [terrainExaggeration=1.0] A scalar used to exaggerate the terrain. Note that terrain exaggeration will not modify any other primitive as they are positioned relative to the ellipsoid.
* @property {Boolean} [shadows=false] Determines if shadows are cast by light sources.
* @property {ShadowMode} [terrainShadows=ShadowMode.RECEIVE_ONLY] Determines if the terrain casts or receives shadows from light sources.
* @property {MapMode2D} [mapMode2D=MapMode2D.INFINITE_SCROLL] Determines if the 2D map is rotatable or can be scrolled infinitely in the horizontal direction.
* @property {Boolean} [projectionPicker=false] If set to true, the ProjectionPicker widget will be created.
* @property {Boolean} [requestRenderMode=false] If true, rendering a frame will only occur when needed as determined by changes within the scene. Enabling reduces the CPU/GPU usage of your application and uses less battery on mobile, but requires using {@link Scene#requestRender} to render a new frame explicitly in this mode. This will be necessary in many cases after making changes to the scene in other parts of the API. See {@link https://cesium.com/blog/2018/01/24/cesium-scene-rendering-performance/|Improving Performance with Explicit Rendering}.
* @property {Number} [maximumRenderTimeChange=0.0] If requestRenderMode is true, this value defines the maximum change in simulation time allowed before a render is requested. See {@link https://cesium.com/blog/2018/01/24/cesium-scene-rendering-performance/|Improving Performance with Explicit Rendering}.
*/
/**
* A base widget for building applications. It composites all of the standard Cesium widgets into one reusable package.
* The widget can always be extended by using mixins, which add functionality useful for a variety of applications.
*
* @alias Viewer
* @constructor
*
* @param {Element|String} container The DOM element or ID that will contain the widget.
* @param {Viewer.ConstructorOptions} [options] Object describing initialization options
*
* @exception {DeveloperError} Element with id "container" does not exist in the document.
* @exception {DeveloperError} options.selectedImageryProviderViewModel is not available when not using the BaseLayerPicker widget, specify options.imageryProvider instead.
* @exception {DeveloperError} options.selectedTerrainProviderViewModel is not available when not using the BaseLayerPicker widget, specify options.terrainProvider instead.
*
* @see Animation
* @see BaseLayerPicker
* @see CesiumWidget
* @see FullscreenButton
* @see HomeButton
* @see SceneModePicker
* @see Timeline
* @see viewerDragDropMixin
*
* @demo {@link https://sandcastle.cesium.com/index.html?src=Hello%20World.html|Cesium Sandcastle Hello World Demo}
*
* @example
* //Initialize the viewer widget with several custom options and mixins.
* var viewer = new Cesium.Viewer('cesiumContainer', {
* //Start in Columbus Viewer
* sceneMode : Cesium.SceneMode.COLUMBUS_VIEW,
* //Use Cesium World Terrain
* terrainProvider : Cesium.createWorldTerrain(),
* //Hide the base layer picker
* baseLayerPicker : false,
* //Use OpenStreetMaps
* imageryProvider : new Cesium.OpenStreetMapImageryProvider({
* url : 'https://a.tile.openstreetmap.org/'
* }),
* skyBox : new Cesium.SkyBox({
* sources : {
* positiveX : 'stars/TychoSkymapII.t3_08192x04096_80_px.jpg',
* negativeX : 'stars/TychoSkymapII.t3_08192x04096_80_mx.jpg',
* positiveY : 'stars/TychoSkymapII.t3_08192x04096_80_py.jpg',
* negativeY : 'stars/TychoSkymapII.t3_08192x04096_80_my.jpg',
* positiveZ : 'stars/TychoSkymapII.t3_08192x04096_80_pz.jpg',
* negativeZ : 'stars/TychoSkymapII.t3_08192x04096_80_mz.jpg'
* }
* }),
* // Show Columbus View map with Web Mercator projection
* mapProjection : new Cesium.WebMercatorProjection()
* });
*
* //Add basic drag and drop functionality
* viewer.extend(Cesium.viewerDragDropMixin);
*
* //Show a pop-up alert if we encounter an error when processing a dropped file
* viewer.dropError.addEventListener(function(dropHandler, name, error) {
* console.log(error);
* window.alert(error);
* });
*/
function Viewer(container, options) {
//>>includeStart('debug', pragmas.debug);
if (!defined(container)) {
throw new DeveloperError("container is required.");
}
//>>includeEnd('debug');
container = getElement(container);
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
var createBaseLayerPicker =
(!defined(options.globe) || options.globe !== false) &&
(!defined(options.baseLayerPicker) || options.baseLayerPicker !== false);
//>>includeStart('debug', pragmas.debug);
// If not using BaseLayerPicker, selectedImageryProviderViewModel is an invalid option
if (
!createBaseLayerPicker &&
defined(options.selectedImageryProviderViewModel)
) {
throw new DeveloperError(
"options.selectedImageryProviderViewModel is not available when not using the BaseLayerPicker widget. \
Either specify options.imageryProvider instead or set options.baseLayerPicker to true."
);
}
// If not using BaseLayerPicker, selectedTerrainProviderViewModel is an invalid option
if (
!createBaseLayerPicker &&
defined(options.selectedTerrainProviderViewModel)
) {
throw new DeveloperError(
"options.selectedTerrainProviderViewModel is not available when not using the BaseLayerPicker widget. \
Either specify options.terrainProvider instead or set options.baseLayerPicker to true."
);
}
//>>includeEnd('debug')
var that = this;
var viewerContainer = document.createElement("div");
viewerContainer.className = "cesium-viewer";
container.appendChild(viewerContainer);
// Cesium widget container
var cesiumWidgetContainer = document.createElement("div");
cesiumWidgetContainer.className = "cesium-viewer-cesiumWidgetContainer";
viewerContainer.appendChild(cesiumWidgetContainer);
// Bottom container
var bottomContainer = document.createElement("div");
bottomContainer.className = "cesium-viewer-bottom";
viewerContainer.appendChild(bottomContainer);
var scene3DOnly = defaultValue(options.scene3DOnly, false);
var clock;
var clockViewModel;
var destroyClockViewModel = false;
if (defined(options.clockViewModel)) {
clockViewModel = options.clockViewModel;
clock = clockViewModel.clock;
} else {
clock = new Clock();
clockViewModel = new ClockViewModel(clock);
destroyClockViewModel = true;
}
if (defined(options.shouldAnimate)) {
clock.shouldAnimate = options.shouldAnimate;
}
// Cesium widget
var cesiumWidget = new CesiumWidget(cesiumWidgetContainer, {
imageryProvider:
createBaseLayerPicker || defined(options.imageryProvider)
? false
: undefined,
clock: clock,
skyBox: options.skyBox,
skyAtmosphere: options.skyAtmosphere,
sceneMode: options.sceneMode,
mapProjection: options.mapProjection,
globe: options.globe,
orderIndependentTranslucency: options.orderIndependentTranslucency,
contextOptions: options.contextOptions,
useDefaultRenderLoop: options.useDefaultRenderLoop,
targetFrameRate: options.targetFrameRate,
showRenderLoopErrors: options.showRenderLoopErrors,
useBrowserRecommendedResolution: options.useBrowserRecommendedResolution,
creditContainer: defined(options.creditContainer)
? options.creditContainer
: bottomContainer,
creditViewport: options.creditViewport,
scene3DOnly: scene3DOnly,
terrainExaggeration: options.terrainExaggeration,
shadows: options.shadows,
terrainShadows: options.terrainShadows,
mapMode2D: options.mapMode2D,
requestRenderMode: options.requestRenderMode,
maximumRenderTimeChange: options.maximumRenderTimeChange,
});
var dataSourceCollection = options.dataSources;
var destroyDataSourceCollection = false;
if (!defined(dataSourceCollection)) {
dataSourceCollection = new DataSourceCollection();
destroyDataSourceCollection = true;
}
var scene = cesiumWidget.scene;
var dataSourceDisplay = new DataSourceDisplay({
scene: scene,
dataSourceCollection: dataSourceCollection,
});
var eventHelper = new EventHelper();
eventHelper.add(clock.onTick, Viewer.prototype._onTick, this);
eventHelper.add(scene.morphStart, Viewer.prototype._clearTrackedObject, this);
// Selection Indicator
var selectionIndicator;
if (
!defined(options.selectionIndicator) ||
options.selectionIndicator !== false
) {
var selectionIndicatorContainer = document.createElement("div");
selectionIndicatorContainer.className =
"cesium-viewer-selectionIndicatorContainer";
viewerContainer.appendChild(selectionIndicatorContainer);
selectionIndicator = new SelectionIndicator(
selectionIndicatorContainer,
scene
);
}
// Info Box
var infoBox;
if (!defined(options.infoBox) || options.infoBox !== false) {
var infoBoxContainer = document.createElement("div");
infoBoxContainer.className = "cesium-viewer-infoBoxContainer";
viewerContainer.appendChild(infoBoxContainer);
infoBox = new InfoBox(infoBoxContainer);
var infoBoxViewModel = infoBox.viewModel;
eventHelper.add(
infoBoxViewModel.cameraClicked,
Viewer.prototype._onInfoBoxCameraClicked,
this
);
eventHelper.add(
infoBoxViewModel.closeClicked,
Viewer.prototype._onInfoBoxClockClicked,
this
);
}
// Main Toolbar
var toolbar = document.createElement("div");
toolbar.className = "cesium-viewer-toolbar";
viewerContainer.appendChild(toolbar);
// Geocoder
var geocoder;
if (!defined(options.geocoder) || options.geocoder !== false) {
var geocoderContainer = document.createElement("div");
geocoderContainer.className = "cesium-viewer-geocoderContainer";
toolbar.appendChild(geocoderContainer);
var geocoderService;
if (defined(options.geocoder) && typeof options.geocoder !== "boolean") {
geocoderService = Array.isArray(options.geocoder)
? options.geocoder
: [options.geocoder];
}
geocoder = new Geocoder({
container: geocoderContainer,
geocoderServices: geocoderService,
scene: scene,
});
// Subscribe to search so that we can clear the trackedEntity when it is clicked.
eventHelper.add(
geocoder.viewModel.search.beforeExecute,
Viewer.prototype._clearObjects,
this
);
}
// HomeButton
var homeButton;
if (!defined(options.homeButton) || options.homeButton !== false) {
homeButton = new HomeButton(toolbar, scene);
if (defined(geocoder)) {
eventHelper.add(homeButton.viewModel.command.afterExecute, function () {
var viewModel = geocoder.viewModel;
viewModel.searchText = "";
if (viewModel.isSearchInProgress) {
viewModel.search();
}
});
}
// Subscribe to the home button beforeExecute event so that we can clear the trackedEntity.
eventHelper.add(
homeButton.viewModel.command.beforeExecute,
Viewer.prototype._clearTrackedObject,
this
);
}
// SceneModePicker
// By default, we silently disable the scene mode picker if scene3DOnly is true,
// but if sceneModePicker is explicitly set to true, throw an error.
//>>includeStart('debug', pragmas.debug);
if (options.sceneModePicker === true && scene3DOnly) {
throw new DeveloperError(
"options.sceneModePicker is not available when options.scene3DOnly is set to true."
);
}
//>>includeEnd('debug');
var sceneModePicker;
if (
!scene3DOnly &&
(!defined(options.sceneModePicker) || options.sceneModePicker !== false)
) {
sceneModePicker = new SceneModePicker(toolbar, scene);
}
var projectionPicker;
if (options.projectionPicker) {
projectionPicker = new ProjectionPicker(toolbar, scene);
}
// BaseLayerPicker
var baseLayerPicker;
var baseLayerPickerDropDown;
if (createBaseLayerPicker) {
var imageryProviderViewModels = defaultValue(
options.imageryProviderViewModels,
createDefaultImageryProviderViewModels()
);
var terrainProviderViewModels = defaultValue(
options.terrainProviderViewModels,
createDefaultTerrainProviderViewModels()
);
baseLayerPicker = new BaseLayerPicker(toolbar, {
globe: scene.globe,
imageryProviderViewModels: imageryProviderViewModels,
selectedImageryProviderViewModel:
options.selectedImageryProviderViewModel,
terrainProviderViewModels: terrainProviderViewModels,
selectedTerrainProviderViewModel:
options.selectedTerrainProviderViewModel,
});
//Grab the dropdown for resize code.
var elements = toolbar.getElementsByClassName(
"cesium-baseLayerPicker-dropDown"
);
baseLayerPickerDropDown = elements[0];
}
// These need to be set after the BaseLayerPicker is created in order to take effect
if (defined(options.imageryProvider) && options.imageryProvider !== false) {
if (createBaseLayerPicker) {
baseLayerPicker.viewModel.selectedImagery = undefined;
}
scene.imageryLayers.removeAll();
scene.imageryLayers.addImageryProvider(options.imageryProvider);
}
if (defined(options.terrainProvider)) {
if (createBaseLayerPicker) {
baseLayerPicker.viewModel.selectedTerrain = undefined;
}
scene.terrainProvider = options.terrainProvider;
}
// Navigation Help Button
var navigationHelpButton;
if (
!defined(options.navigationHelpButton) ||
options.navigationHelpButton !== false
) {
var showNavHelp = true;
try {
//window.localStorage is null if disabled in Firefox or undefined in browsers with implementation
if (defined(window.localStorage)) {
var hasSeenNavHelp = window.localStorage.getItem(
"cesium-hasSeenNavHelp"
);
if (defined(hasSeenNavHelp) && Boolean(hasSeenNavHelp)) {
showNavHelp = false;
} else {
window.localStorage.setItem("cesium-hasSeenNavHelp", "true");
}
}
} catch (e) {
//Accessing window.localStorage throws if disabled in Chrome
//window.localStorage.setItem throws if in Safari private browsing mode or in any browser if we are over quota.
}
navigationHelpButton = new NavigationHelpButton({
container: toolbar,
instructionsInitiallyVisible: defaultValue(
options.navigationInstructionsInitiallyVisible,
showNavHelp
),
});
}
// Animation
var animation;
if (!defined(options.animation) || options.animation !== false) {
var animationContainer = document.createElement("div");
animationContainer.className = "cesium-viewer-animationContainer";
viewerContainer.appendChild(animationContainer);
animation = new Animation(
animationContainer,
new AnimationViewModel(clockViewModel)
);
}
// Timeline
var timeline;
if (!defined(options.timeline) || options.timeline !== false) {
var timelineContainer = document.createElement("div");
timelineContainer.className = "cesium-viewer-timelineContainer";
viewerContainer.appendChild(timelineContainer);
timeline = new Timeline(timelineContainer, clock);
timeline.addEventListener("settime", onTimelineScrubfunction, false);
timeline.zoomTo(clock.startTime, clock.stopTime);
}
// Fullscreen
var fullscreenButton;
var fullscreenSubscription;
var fullscreenContainer;
if (
!defined(options.fullscreenButton) ||
options.fullscreenButton !== false
) {
fullscreenContainer = document.createElement("div");
fullscreenContainer.className = "cesium-viewer-fullscreenContainer";
viewerContainer.appendChild(fullscreenContainer);
fullscreenButton = new FullscreenButton(
fullscreenContainer,
options.fullscreenElement
);
//Subscribe to fullscreenButton.viewModel.isFullscreenEnabled so
//that we can hide/show the button as well as size the timeline.
fullscreenSubscription = subscribeAndEvaluate(
fullscreenButton.viewModel,
"isFullscreenEnabled",
function (isFullscreenEnabled) {
fullscreenContainer.style.display = isFullscreenEnabled
? "block"
: "none";
if (defined(timeline)) {
timeline.container.style.right =
fullscreenContainer.clientWidth + "px";
timeline.resize();
}
}
);
}
// VR
var vrButton;
var vrSubscription;
var vrModeSubscription;
if (options.vrButton) {
var vrContainer = document.createElement("div");
vrContainer.className = "cesium-viewer-vrContainer";
viewerContainer.appendChild(vrContainer);
vrButton = new VRButton(vrContainer, scene, options.fullScreenElement);
vrSubscription = subscribeAndEvaluate(
vrButton.viewModel,
"isVREnabled",
function (isVREnabled) {
vrContainer.style.display = isVREnabled ? "block" : "none";
if (defined(fullscreenButton)) {
vrContainer.style.right = fullscreenContainer.clientWidth + "px";
}
if (defined(timeline)) {
timeline.container.style.right = vrContainer.clientWidth + "px";
timeline.resize();
}
}
);
vrModeSubscription = subscribeAndEvaluate(
vrButton.viewModel,
"isVRMode",
function (isVRMode) {
enableVRUI(that, isVRMode);
}
);
}
//Assign all properties to this instance. No "this" assignments should
//take place above this line.
this._baseLayerPickerDropDown = baseLayerPickerDropDown;
this._fullscreenSubscription = fullscreenSubscription;
this._vrSubscription = vrSubscription;
this._vrModeSubscription = vrModeSubscription;
this._dataSourceChangedListeners = {};
this._automaticallyTrackDataSourceClocks = defaultValue(
options.automaticallyTrackDataSourceClocks,
true
);
this._container = container;
this._bottomContainer = bottomContainer;
this._element = viewerContainer;
this._cesiumWidget = cesiumWidget;
this._selectionIndicator = selectionIndicator;
this._infoBox = infoBox;
this._dataSourceCollection = dataSourceCollection;
this._destroyDataSourceCollection = destroyDataSourceCollection;
this._dataSourceDisplay = dataSourceDisplay;
this._clockViewModel = clockViewModel;
this._destroyClockViewModel = destroyClockViewModel;
this._toolbar = toolbar;
this._homeButton = homeButton;
this._sceneModePicker = sceneModePicker;
this._projectionPicker = projectionPicker;
this._baseLayerPicker = baseLayerPicker;
this._navigationHelpButton = navigationHelpButton;
this._animation = animation;
this._timeline = timeline;
this._fullscreenButton = fullscreenButton;
this._vrButton = vrButton;
this._geocoder = geocoder;
this._eventHelper = eventHelper;
this._lastWidth = 0;
this._lastHeight = 0;
this._allowDataSourcesToSuspendAnimation = true;
this._entityView = undefined;
this._enableInfoOrSelection = defined(infoBox) || defined(selectionIndicator);
this._clockTrackedDataSource = undefined;
this._trackedEntity = undefined;
this._needTrackedEntityUpdate = false;
this._selectedEntity = undefined;
this._clockTrackedDataSource = undefined;
this._zoomIsFlight = false;
this._zoomTarget = undefined;
this._zoomPromise = undefined;
this._zoomOptions = undefined;
this._selectedEntityChanged = new Event();
this._trackedEntityChanged = new Event();
knockout.track(this, [
"_trackedEntity",
"_selectedEntity",
"_clockTrackedDataSource",
]);
//Listen to data source events in order to track clock changes.
eventHelper.add(
dataSourceCollection.dataSourceAdded,
Viewer.prototype._onDataSourceAdded,
this
);
eventHelper.add(
dataSourceCollection.dataSourceRemoved,
Viewer.prototype._onDataSourceRemoved,
this
);
// Prior to each render, check if anything needs to be resized.
eventHelper.add(scene.postUpdate, Viewer.prototype.resize, this);
eventHelper.add(scene.postRender, Viewer.prototype._postRender, this);
// We need to subscribe to the data sources and collections so that we can clear the
// tracked object when it is removed from the scene.
// Subscribe to current data sources
var dataSourceLength = dataSourceCollection.length;
for (var i = 0; i < dataSourceLength; i++) {
this._dataSourceAdded(dataSourceCollection, dataSourceCollection.get(i));
}
this._dataSourceAdded(undefined, dataSourceDisplay.defaultDataSource);
// Hook up events so that we can subscribe to future sources.
eventHelper.add(
dataSourceCollection.dataSourceAdded,
Viewer.prototype._dataSourceAdded,
this
);
eventHelper.add(
dataSourceCollection.dataSourceRemoved,
Viewer.prototype._dataSourceRemoved,
this
);
// Subscribe to left clicks and zoom to the picked object.
function pickAndTrackObject(e) {
var entity = pickEntity(that, e);
if (defined(entity)) {
//Only track the entity if it has a valid position at the current time.
if (
Property.getValueOrUndefined(entity.position, that.clock.currentTime)
) {
that.trackedEntity = entity;
} else {
that.zoomTo(entity);
}
} else if (defined(that.trackedEntity)) {
that.trackedEntity = undefined;
}
}
function pickAndSelectObject(e) {
that.selectedEntity = pickEntity(that, e);
}
cesiumWidget.screenSpaceEventHandler.setInputAction(
pickAndSelectObject,
ScreenSpaceEventType.LEFT_CLICK
);
cesiumWidget.screenSpaceEventHandler.setInputAction(
pickAndTrackObject,
ScreenSpaceEventType.LEFT_DOUBLE_CLICK
);
}
Object.defineProperties(Viewer.prototype, {
/**
* Gets the parent container.
* @memberof Viewer.prototype
* @type {Element}
* @readonly
*/
container: {
get: function () {
return this._container;
},
},
/**
* Gets the DOM element for the area at the bottom of the window containing the
* {@link CreditDisplay} and potentially other things.
* @memberof Viewer.prototype
* @type {Element}
* @readonly
*/
bottomContainer: {
get: function () {
return this._bottomContainer;
},
},
/**
* Gets the CesiumWidget.
* @memberof Viewer.prototype
* @type {CesiumWidget}
* @readonly
*/
cesiumWidget: {
get: function () {
return this._cesiumWidget;
},
},
/**
* Gets the selection indicator.
* @memberof Viewer.prototype
* @type {SelectionIndicator}
* @readonly
*/
selectionIndicator: {
get: function () {
return this._selectionIndicator;
},
},
/**
* Gets the info box.
* @memberof Viewer.prototype
* @type {InfoBox}
* @readonly
*/
infoBox: {
get: function () {
return this._infoBox;
},
},
/**
* Gets the Geocoder.
* @memberof Viewer.prototype
* @type {Geocoder}
* @readonly
*/
geocoder: {
get: function () {
return this._geocoder;
},
},
/**
* Gets the HomeButton.
* @memberof Viewer.prototype
* @type {HomeButton}
* @readonly
*/
homeButton: {