Source: core/drawing/engine/canvas/canvasContainer.js

  1. /**
  2.  * @fileoverview Abstract Canvas class representing a container.
  3.  * @private
  4.  */
  6. goog.provide('xrx.canvas.Container');
  10. goog.require('xrx.canvas.Element');
  14. /**
  15.  * Abstract Canvas class representing a container.
  16.  * @param {xrx.canvas.Canvas} canvas The parent canvas object.
  17.  * @constructor
  18.  * @private
  19.  */
  20. xrx.canvas.Container = function(canvas) {
  22.   goog.base(this, canvas);
  24.   /**
  25.    * The child elements of this container.
  26.    * @type {Array<xrx.canvas.Element>}
  27.    */
  28.   this.childs_ = [];
  29. };
  30. goog.inherits(xrx.canvas.Container, xrx.canvas.Element);
  34. /**
  35.  * Adds a child element to this container.
  36.  * @param {xrx.canvas.Element} element The child element.
  37.  */
  38. xrx.canvas.Container.prototype.addChild = function(element) {
  39.   this.childs_.push(element);
  40. };
  44. /**
  45.  * Returns the child elements of this container.
  46.  * @return {Array<xrx.canvas.Element>} The child elements.
  47.  */
  48. xrx.canvas.Container.prototype.getChildren = function() {
  49.   return this.childs_;
  50. };
  54. /**
  55.  * Removes all child elements from this container.
  56.  */
  57. xrx.canvas.Container.prototype.removeChildren = function() {
  58.   this.childs_ = [];
  59. };
  63. /**
  64.  * Removes a child element at an index.
  65.  * @param {number} index The index.
  66.  */
  67. xrx.canvas.Container.prototype.removeChildAt = function(index) {
  68.   this.childs_.splice(index, 1);
  69. };
  73. xrx.canvas.Container.prototype.disposeInternal = function() {
  74.   var child;
  75.   while(child = this.childs_.pop()) {
  76.     child.dispose();
  77.   }
  78.   this.childs_ = null;
  79.   goog.base(this, 'disposeInternal');
  80. };