/
BaseLayerPicker.js
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/
BaseLayerPicker.js
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/*global define*/
define([
'../../Core/defined',
'../../Core/defineProperties',
'../../Core/destroyObject',
'../../Core/DeveloperError',
'../../Core/FeatureDetection',
'../../ThirdParty/knockout',
'../getElement',
'./BaseLayerPickerViewModel'
], function(
defined,
defineProperties,
destroyObject,
DeveloperError,
FeatureDetection,
knockout,
getElement,
BaseLayerPickerViewModel) {
'use strict';
/**
* <span style="display: block; text-align: center;">
* <img src="images/BaseLayerPicker.png" width="264" height="287" alt="" />
* <br />BaseLayerPicker with its drop-panel open.
* </span>
* <br /><br />
* The BaseLayerPicker is a single button widget that displays a panel of available imagery and
* terrain providers. When imagery is selected, the corresponding imagery layer is created and inserted
* as the base layer of the imagery collection; removing the existing base. When terrain is selected,
* it replaces the current terrain provider. Each item in the available providers list contains a name,
* a representative icon, and a tooltip to display more information when hovered. The list is initially
* empty, and must be configured before use, as illustrated in the below example.
*
* @alias BaseLayerPicker
* @constructor
*
* @param {Element|String} container The parent HTML container node or ID for this widget.
* @param {Object} options Object with the following properties:
* @param {Globe} options.globe The Globe to use.
* @param {ProviderViewModel[]} [options.imageryProviderViewModels=[]] The array of ProviderViewModel instances to use for imagery.
* @param {ProviderViewModel} [options.selectedImageryProviderViewModel] The view model for the current base imagery layer, if not supplied the first available imagery layer is used.
* @param {ProviderViewModel[]} [options.terrainProviderViewModels=[]] The array of ProviderViewModel instances to use for terrain.
* @param {ProviderViewModel} [options.selectedTerrainProviderViewModel] The view model for the current base terrain layer, if not supplied the first available terrain layer is used.
*
* @exception {DeveloperError} Element with id "container" does not exist in the document.
*
*
* @example
* // In HTML head, include a link to the BaseLayerPicker.css stylesheet,
* // and in the body, include: <div id="baseLayerPickerContainer"
* // style="position:absolute;top:24px;right:24px;width:38px;height:38px;"></div>
*
* //Create the list of available providers we would like the user to select from.
* //This example uses 3, OpenStreetMap, The Black Marble, and a single, non-streaming world image.
* var imageryViewModels = [];
* imageryViewModels.push(new Cesium.ProviderViewModel({
* name : 'Open\u00adStreet\u00adMap',
* iconUrl : Cesium.buildModuleUrl('Widgets/Images/ImageryProviders/openStreetMap.png'),
* tooltip : 'OpenStreetMap (OSM) is a collaborative project to create a free editable \
* map of the world.\nhttp://www.openstreetmap.org',
* creationFunction : function() {
* return Cesium.createOpenStreetMapImageryProvider({
* url : 'https://a.tile.openstreetmap.org/'
* });
* }
* }));
*
* imageryViewModels.push(new Cesium.ProviderViewModel({
* name : 'Black Marble',
* iconUrl : Cesium.buildModuleUrl('Widgets/Images/ImageryProviders/blackMarble.png'),
* tooltip : 'The lights of cities and villages trace the outlines of civilization \
* in this global view of the Earth at night as seen by NASA/NOAA\'s Suomi NPP satellite.',
* creationFunction : function() {
* return Cesium.createTileMapServiceImageryProvider({
* url : 'https://cesiumjs.org/blackmarble',
* credit : 'Black Marble imagery courtesy NASA Earth Observatory',
* flipXY : true
* });
* }
* }));
*
* imageryViewModels.push(new Cesium.ProviderViewModel({
* name : 'Natural Earth\u00a0II',
* iconUrl : Cesium.buildModuleUrl('Widgets/Images/ImageryProviders/naturalEarthII.png'),
* tooltip : 'Natural Earth II, darkened for contrast.\nhttp://www.naturalearthdata.com/',
* creationFunction : function() {
* return Cesium.createTileMapServiceImageryProvider({
* url : Cesium.buildModuleUrl('Assets/Textures/NaturalEarthII')
* });
* }
* }));
*
* //Create a CesiumWidget without imagery, if you haven't already done so.
* var cesiumWidget = new Cesium.CesiumWidget('cesiumContainer', { imageryProvider: false });
*
* //Finally, create the baseLayerPicker widget using our view models.
* var layers = cesiumWidget.imageryLayers;
* var baseLayerPicker = new Cesium.BaseLayerPicker('baseLayerPickerContainer', {
* globe : cesiumWidget.scene.globe,
* imageryProviderViewModels : imageryViewModels
* });
*
* @see TerrainProvider
* @see ImageryProvider
* @see ImageryLayerCollection
*/
function BaseLayerPicker(container, options) {
//>>includeStart('debug', pragmas.debug);
if (!defined(container)) {
throw new DeveloperError('container is required.');
}
//>>includeEnd('debug');
container = getElement(container);
var viewModel = new BaseLayerPickerViewModel(options);
var element = document.createElement('button');
element.type = 'button';
element.className = 'cesium-button cesium-toolbar-button';
element.setAttribute('data-bind', '\
attr: { title: buttonTooltip },\
click: toggleDropDown');
container.appendChild(element);
var imgElement = document.createElement('img');
imgElement.setAttribute('draggable', 'false');
imgElement.className = 'cesium-baseLayerPicker-selected';
imgElement.setAttribute('data-bind', '\
attr: { src: buttonImageUrl }');
element.appendChild(imgElement);
var dropPanel = document.createElement('div');
dropPanel.className = 'cesium-baseLayerPicker-dropDown';
dropPanel.setAttribute('data-bind', '\
css: { "cesium-baseLayerPicker-dropDown-visible" : dropDownVisible }');
container.appendChild(dropPanel);
var imageryTitle = document.createElement('div');
imageryTitle.className = 'cesium-baseLayerPicker-sectionTitle';
imageryTitle.setAttribute('data-bind', 'visible: imageryProviderViewModels.length > 0');
imageryTitle.innerHTML = 'Imagery';
dropPanel.appendChild(imageryTitle);
var imageryChoices = document.createElement('div');
imageryChoices.className = 'cesium-baseLayerPicker-choices';
imageryChoices.setAttribute('data-bind', 'foreach: imageryProviderViewModels');
dropPanel.appendChild(imageryChoices);
var imageryProvider = document.createElement('div');
imageryProvider.className = 'cesium-baseLayerPicker-item';
imageryProvider.setAttribute('data-bind', '\
css: { "cesium-baseLayerPicker-selectedItem" : $data === $parent.selectedImagery },\
attr: { title: tooltip },\
visible: creationCommand.canExecute,\
click: function($data) { $parent.selectedImagery = $data; }');
imageryChoices.appendChild(imageryProvider);
var providerIcon = document.createElement('img');
providerIcon.className = 'cesium-baseLayerPicker-itemIcon';
providerIcon.setAttribute('data-bind', 'attr: { src: iconUrl }');
providerIcon.setAttribute('draggable', 'false');
imageryProvider.appendChild(providerIcon);
var providerLabel = document.createElement('div');
providerLabel.className = 'cesium-baseLayerPicker-itemLabel';
providerLabel.setAttribute('data-bind', 'text: name');
imageryProvider.appendChild(providerLabel);
var terrainTitle = document.createElement('div');
terrainTitle.className = 'cesium-baseLayerPicker-sectionTitle';
terrainTitle.setAttribute('data-bind', 'visible: terrainProviderViewModels.length > 0');
terrainTitle.innerHTML = 'Terrain';
dropPanel.appendChild(terrainTitle);
var terrainChoices = document.createElement('div');
terrainChoices.className = 'cesium-baseLayerPicker-choices';
terrainChoices.setAttribute('data-bind', 'foreach: terrainProviderViewModels');
dropPanel.appendChild(terrainChoices);
var terrainProvider = document.createElement('div');
terrainProvider.className = 'cesium-baseLayerPicker-item';
terrainProvider.setAttribute('data-bind', '\
css: { "cesium-baseLayerPicker-selectedItem" : $data === $parent.selectedTerrain },\
attr: { title: tooltip },\
visible: creationCommand.canExecute,\
click: function($data) { $parent.selectedTerrain = $data; }');
terrainChoices.appendChild(terrainProvider);
var terrainProviderIcon = document.createElement('img');
terrainProviderIcon.className = 'cesium-baseLayerPicker-itemIcon';
terrainProviderIcon.setAttribute('data-bind', 'attr: { src: iconUrl }');
terrainProviderIcon.setAttribute('draggable', 'false');
terrainProvider.appendChild(terrainProviderIcon);
var terrainProviderLabel = document.createElement('div');
terrainProviderLabel.className = 'cesium-baseLayerPicker-itemLabel';
terrainProviderLabel.setAttribute('data-bind', 'text: name');
terrainProvider.appendChild(terrainProviderLabel);
knockout.applyBindings(viewModel, element);
knockout.applyBindings(viewModel, dropPanel);
this._viewModel = viewModel;
this._container = container;
this._element = element;
this._dropPanel = dropPanel;
this._closeDropDown = function(e) {
if (!(element.contains(e.target) || dropPanel.contains(e.target))) {
viewModel.dropDownVisible = false;
}
};
if (FeatureDetection.supportsPointerEvents()) {
document.addEventListener('pointerdown', this._closeDropDown, true);
} else {
document.addEventListener('mousedown', this._closeDropDown, true);
document.addEventListener('touchstart', this._closeDropDown, true);
}
}
defineProperties(BaseLayerPicker.prototype, {
/**
* Gets the parent container.
* @memberof BaseLayerPicker.prototype
*
* @type {Element}
*/
container : {
get : function() {
return this._container;
}
},
/**
* Gets the view model.
* @memberof BaseLayerPicker.prototype
*
* @type {BaseLayerPickerViewModel}
*/
viewModel : {
get : function() {
return this._viewModel;
}
}
});
/**
* @returns {Boolean} true if the object has been destroyed, false otherwise.
*/
BaseLayerPicker.prototype.isDestroyed = function() {
return false;
};
/**
* Destroys the widget. Should be called if permanently
* removing the widget from layout.
*/
BaseLayerPicker.prototype.destroy = function() {
if (FeatureDetection.supportsPointerEvents()) {
document.removeEventListener('pointerdown', this._closeDropDown, true);
} else {
document.removeEventListener('mousedown', this._closeDropDown, true);
document.removeEventListener('touchstart', this._closeDropDown, true);
}
knockout.cleanNode(this._element);
knockout.cleanNode(this._dropPanel);
this._container.removeChild(this._element);
this._container.removeChild(this._dropPanel);
return destroyObject(this);
};
return BaseLayerPicker;
});