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node_modules/three/src/extras/Controls.js

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+import { EventDispatcher } from '../core/EventDispatcher.js';
+import { warn } from '../utils.js';
+
+/**
+ * Abstract base class for controls.
+ *
+ * @abstract
+ * @augments EventDispatcher
+ */
+class Controls extends EventDispatcher {
+
+	/**
+	 * Constructs a new controls instance.
+	 *
+	 * @param {Object3D} object - The object that is managed by the controls.
+	 * @param {?HTMLElement} domElement - The HTML element used for event listeners.
+	 */
+	constructor( object, domElement = null ) {
+
+		super();
+
+		/**
+		 * The object that is managed by the controls.
+		 *
+		 * @type {Object3D}
+		 */
+		this.object = object;
+
+		/**
+		 * The HTML element used for event listeners.
+		 *
+		 * @type {?HTMLElement}
+		 * @default null
+		 */
+		this.domElement = domElement;
+
+		/**
+		 * Whether the controls responds to user input or not.
+		 *
+		 * @type {boolean}
+		 * @default true
+		 */
+		this.enabled = true;
+
+		/**
+		 * The internal state of the controls.
+		 *
+		 * @type {number}
+		 * @default -1
+		 */
+		this.state = - 1;
+
+		/**
+		 * This object defines the keyboard input of the controls.
+		 *
+		 * @type {Object}
+		 */
+		this.keys = {};
+
+		/**
+		 * This object defines what type of actions are assigned to the available mouse buttons.
+		 * It depends on the control implementation what kind of mouse buttons and actions are supported.
+		 *
+		 * @type {{LEFT: ?number, MIDDLE: ?number, RIGHT: ?number}}
+		 */
+		this.mouseButtons = { LEFT: null, MIDDLE: null, RIGHT: null };
+
+		/**
+		 * This object defines what type of actions are assigned to what kind of touch interaction.
+		 * It depends on the control implementation what kind of touch interaction and actions are supported.
+		 *
+		 * @type {{ONE: ?number, TWO: ?number}}
+		 */
+		this.touches = { ONE: null, TWO: null };
+
+	}
+
+	/**
+	 * Connects the controls to the DOM. This method has so called "side effects" since
+	 * it adds the module's event listeners to the DOM.
+	 *
+	 * @param {HTMLElement} element - The DOM element to connect to.
+	 */
+	connect( element ) {
+
+		if ( element === undefined ) {
+
+			warn( 'Controls: connect() now requires an element.' ); // @deprecated, the warning can be removed with r185
+			return;
+
+		}
+
+		if ( this.domElement !== null ) this.disconnect();
+
+		this.domElement = element;
+
+	}
+
+	/**
+	 * Disconnects the controls from the DOM.
+	 */
+	disconnect() {}
+
+	/**
+	 * Call this method if you no longer want use to the controls. It frees all internal
+	 * resources and removes all event listeners.
+	 */
+	dispose() {}
+
+	/**
+	 * Controls should implement this method if they have to update their internal state
+	 * per simulation step.
+	 *
+	 * @param {number} [delta] - The time delta in seconds.
+	 */
+	update( /* delta */ ) {}
+
+}
+
+export { Controls };