flymis/WebRoot/dojojs/src/widget/AnimatedPng.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.widget.AnimatedPng");

dojo.require("dojo.widget.*");
dojo.require("dojo.widget.HtmlWidget");

// summary
//	PNGs have great tranparency, but lack animation.
//	This widget lets you point an img tag at an animated gif for graceful degrading,
//	while letting you specify a png containing a grid of cells to animate between.
//
// usage
//	<img dojoType="AnimatedPng"
//		src="images/animatedpng_static.gif"		(for degradation; in case javascript is disabled)
//		aniSrc="images/animatedpng_frames.gif"
//		width="20"
//		height="20"
//		interval="50"
//	/>
//
//	var params = {src: "images/animatedpng_static.gif", aniSrc: "images/animatedpng_frames.gif", width: 20, height: 20, interval: 50};
//	var widget = dojo.widget.createWidget("AnimatedPng", params, document.getElementById("pngContainer"));
//
dojo.widget.defineWidget(
	"dojo.widget.AnimatedPng",
	dojo.widget.HtmlWidget,
	{
		isContainer: false,

		// Integer
		//	width (of each frame) in pixels
		width: 0,
		
		// Integer
		//	height (of each frame) in pixels
		height: 0,
		
		// String
		//	pathname to png file containing frames to be animated (ie, displayed sequentially)
		aniSrc: '',
		
		// Integer
		//	time to display each frame
		interval: 100,

		_blankSrc: dojo.uri.dojoUri("src/widget/templates/images/blank.gif"),

		templateString: '<img class="dojoAnimatedPng" />',

		postCreate: function(){
			this.cellWidth = this.width;