Add existing to tracked

node_modules/@cesium/widgets/Source/HomeButton/HomeButton.js

@@ -0,0 +1,97 @@
+import {
+  defined,
+  destroyObject,
+  DeveloperError,
+  getElement,
+} from "@cesium/engine";
+import knockout from "../ThirdParty/knockout.js";
+import HomeButtonViewModel from "./HomeButtonViewModel.js";
+
+/**
+ * A single button widget for returning to the default camera view of the current scene.
+ *
+ * @alias HomeButton
+ * @constructor
+ *
+ * @param {Element|string} container The DOM element or ID that will contain the widget.
+ * @param {Scene} scene The Scene instance to use.
+ * @param {number} [duration] The time, in seconds, it takes to complete the camera flight home.
+ */
+function HomeButton(container, scene, duration) {
+  //>>includeStart('debug', pragmas.debug);
+  if (!defined(container)) {
+    throw new DeveloperError("container is required.");
+  }
+  //>>includeEnd('debug');
+
+  container = getElement(container);
+
+  const viewModel = new HomeButtonViewModel(scene, duration);
+
+  viewModel._svgPath =
+    "M14,4l-10,8.75h20l-4.25-3.7188v-4.6562h-2.812v2.1875l-2.938-2.5625zm-7.0938,9.906v10.094h14.094v-10.094h-14.094zm2.1876,2.313h3.3122v4.25h-3.3122v-4.25zm5.8442,1.281h3.406v6.438h-3.406v-6.438z";
+
+  const element = document.createElement("button");
+  element.type = "button";
+  element.className = "cesium-button cesium-toolbar-button cesium-home-button";
+  element.setAttribute(
+    "data-bind",
+    "\
+attr: { title: tooltip },\
+click: command,\
+cesiumSvgPath: { path: _svgPath, width: 28, height: 28 }",
+  );
+
+  container.appendChild(element);
+
+  knockout.applyBindings(viewModel, element);
+
+  this._container = container;
+  this._viewModel = viewModel;
+  this._element = element;
+}
+
+Object.defineProperties(HomeButton.prototype, {
+  /**
+   * Gets the parent container.
+   * @memberof HomeButton.prototype
+   *
+   * @type {Element}
+   */
+  container: {
+    get: function () {
+      return this._container;
+    },
+  },
+
+  /**
+   * Gets the view model.
+   * @memberof HomeButton.prototype
+   *
+   * @type {HomeButtonViewModel}
+   */
+  viewModel: {
+    get: function () {
+      return this._viewModel;
+    },
+  },
+});
+
+/**
+ * @returns {boolean} true if the object has been destroyed, false otherwise.
+ */
+HomeButton.prototype.isDestroyed = function () {
+  return false;
+};
+
+/**
+ * Destroys the widget.  Should be called if permanently
+ * removing the widget from layout.
+ */
+HomeButton.prototype.destroy = function () {
+  knockout.cleanNode(this._element);
+  this._container.removeChild(this._element);
+
+  return destroyObject(this);
+};
+export default HomeButton;

node_modules/@cesium/widgets/Source/HomeButton/HomeButtonViewModel.js

@@ -0,0 +1,86 @@
+import { defined, DeveloperError } from "@cesium/engine";
+import knockout from "../ThirdParty/knockout.js";
+import createCommand from "../createCommand.js";
+
+/**
+ * The view model for {@link HomeButton}.
+ * @alias HomeButtonViewModel
+ * @constructor
+ *
+ * @param {Scene} scene The scene instance to use.
+ * @param {number} [duration] The duration of the camera flight in seconds.
+ */
+function HomeButtonViewModel(scene, duration) {
+  //>>includeStart('debug', pragmas.debug);
+  if (!defined(scene)) {
+    throw new DeveloperError("scene is required.");
+  }
+  //>>includeEnd('debug');
+
+  this._scene = scene;
+  this._duration = duration;
+
+  const that = this;
+  this._command = createCommand(function () {
+    that._scene.camera.flyHome(that._duration);
+  });
+
+  /**
+   * Gets or sets the tooltip.  This property is observable.
+   *
+   * @type {string}
+   */
+  this.tooltip = "View Home";
+
+  knockout.track(this, ["tooltip"]);
+}
+
+Object.defineProperties(HomeButtonViewModel.prototype, {
+  /**
+   * Gets the scene to control.
+   * @memberof HomeButtonViewModel.prototype
+   *
+   * @type {Scene}
+   */
+  scene: {
+    get: function () {
+      return this._scene;
+    },
+  },
+
+  /**
+   * Gets the Command that is executed when the button is clicked.
+   * @memberof HomeButtonViewModel.prototype
+   *
+   * @type {Command}
+   */
+  command: {
+    get: function () {
+      return this._command;
+    },
+  },
+
+  /**
+   * Gets or sets the the duration of the camera flight in seconds.
+   * A value of zero causes the camera to instantly switch to home view.
+   * The duration will be computed based on the distance when undefined.
+   * @memberof HomeButtonViewModel.prototype
+   *
+   * @type {number|undefined}
+   */
+  duration: {
+    get: function () {
+      return this._duration;
+    },
+    set: function (value) {
+      //>>includeStart('debug', pragmas.debug);
+      if (defined(value) && value < 0) {
+        throw new DeveloperError("value must be positive.");
+      }
+      //>>includeEnd('debug');
+
+      this._duration = value;
+    },
+  },
+});
+export default HomeButtonViewModel;