Add existing to tracked

2026-08-11 09:53:42 -04:00
parent afe07f3055
commit ffd6e3d73c
8531 changed files with 4396230 additions and 0 deletions
@@ -0,0 +1,201 @@
+import {
+  defined,
+  destroyObject,
+  DeveloperError,
+  EventHelper,
+  OrthographicFrustum,
+  SceneMode,
+} from "@cesium/engine";
+import knockout from "../ThirdParty/knockout.js";
+import createCommand from "../createCommand.js";
+
+/**
+ * The view model for {@link ProjectionPicker}.
+ * @alias ProjectionPickerViewModel
+ * @constructor
+ *
+ * @param {Scene} scene The Scene to switch projections.
+ */
+function ProjectionPickerViewModel(scene) {
+  //>>includeStart('debug', pragmas.debug);
+  if (!defined(scene)) {
+    throw new DeveloperError("scene is required.");
+  }
+  //>>includeEnd('debug');
+
+  this._scene = scene;
+  this._orthographic = scene.camera.frustum instanceof OrthographicFrustum;
+  this._flightInProgress = false;
+
+  /**
+   * Gets or sets whether the button drop-down is currently visible.  This property is observable.
+   * @type {boolean}
+   * @default false
+   */
+  this.dropDownVisible = false;
+
+  /**
+   * Gets or sets the perspective projection tooltip.  This property is observable.
+   * @type {string}
+   * @default 'Perspective Projection'
+   */
+  this.tooltipPerspective = "Perspective Projection";
+
+  /**
+   * Gets or sets the orthographic projection tooltip.  This property is observable.
+   * @type {string}
+   * @default 'Orthographic Projection'
+   */
+  this.tooltipOrthographic = "Orthographic Projection";
+
+  /**
+   * Gets the currently active tooltip.  This property is observable.
+   * @type {string}
+   */
+  this.selectedTooltip = undefined;
+
+  /**
+   * Gets or sets the current SceneMode.  This property is observable.
+   * @type {SceneMode}
+   */
+  this.sceneMode = scene.mode;
+
+  knockout.track(this, [
+    "_orthographic",
+    "_flightInProgress",
+    "sceneMode",
+    "dropDownVisible",
+    "tooltipPerspective",
+    "tooltipOrthographic",
+  ]);
+
+  const that = this;
+  knockout.defineProperty(this, "selectedTooltip", function () {
+    if (that._orthographic) {
+      return that.tooltipOrthographic;
+    }
+    return that.tooltipPerspective;
+  });
+
+  this._toggleDropDown = createCommand(function () {
+    if (that.sceneMode === SceneMode.SCENE2D || that._flightInProgress) {
+      return;
+    }
+
+    that.dropDownVisible = !that.dropDownVisible;
+  });
+
+  this._eventHelper = new EventHelper();
+  this._eventHelper.add(
+    scene.morphComplete,
+    function (transitioner, oldMode, newMode, isMorphing) {
+      that.sceneMode = newMode;
+      that._orthographic =
+        newMode === SceneMode.SCENE2D ||
+        that._scene.camera.frustum instanceof OrthographicFrustum;
+    },
+  );
+  this._eventHelper.add(scene.preRender, function () {
+    that._flightInProgress = defined(scene.camera._currentFlight);
+  });
+
+  this._switchToPerspective = createCommand(function () {
+    if (that.sceneMode === SceneMode.SCENE2D) {
+      return;
+    }
+
+    that._scene.camera.switchToPerspectiveFrustum();
+    that._orthographic = false;
+    that.dropDownVisible = false;
+  });
+
+  this._switchToOrthographic = createCommand(function () {
+    if (that.sceneMode === SceneMode.SCENE2D) {
+      return;
+    }
+
+    that._scene.camera.switchToOrthographicFrustum();
+    that._orthographic = true;
+    that.dropDownVisible = false;
+  });
+
+  //Used by knockout
+  this._sceneMode = SceneMode;
+}
+
+Object.defineProperties(ProjectionPickerViewModel.prototype, {
+  /**
+   * Gets the scene
+   * @memberof ProjectionPickerViewModel.prototype
+   * @type {Scene}
+   */
+  scene: {
+    get: function () {
+      return this._scene;
+    },
+  },
+
+  /**
+   * Gets the command to toggle the drop down box.
+   * @memberof ProjectionPickerViewModel.prototype
+   *
+   * @type {Command}
+   */
+  toggleDropDown: {
+    get: function () {
+      return this._toggleDropDown;
+    },
+  },
+
+  /**
+   * Gets the command to switch to a perspective projection.
+   * @memberof ProjectionPickerViewModel.prototype
+   *
+   * @type {Command}
+   */
+  switchToPerspective: {
+    get: function () {
+      return this._switchToPerspective;
+    },
+  },
+
+  /**
+   * Gets the command to switch to orthographic projection.
+   * @memberof ProjectionPickerViewModel.prototype
+   *
+   * @type {Command}
+   */
+  switchToOrthographic: {
+    get: function () {
+      return this._switchToOrthographic;
+    },
+  },
+
+  /**
+   * Gets whether the scene is currently using an orthographic projection.
+   * @memberof ProjectionPickerViewModel.prototype
+   *
+   * @type {Command}
+   */
+  isOrthographicProjection: {
+    get: function () {
+      return this._orthographic;
+    },
+  },
+});
+
+/**
+ * @returns {boolean} true if the object has been destroyed, false otherwise.
+ */
+ProjectionPickerViewModel.prototype.isDestroyed = function () {
+  return false;
+};
+
+/**
+ * Destroys the view model.
+ */
+ProjectionPickerViewModel.prototype.destroy = function () {
+  this._eventHelper.removeAll();
+  destroyObject(this);
+};
+export default ProjectionPickerViewModel;