dojo_app/js/library/dojox/drawing/ui/dom/Zoom.js

define(["dojo", "../../util/oo", "../../plugins/_Plugin"], 
function(dojo, oo, Plugin){

var Zoom = oo.declare(
	// NOTE:
	//		dojox.drawing.ui.dom.Zoom is DEPRECATED.
	//		This was a temporary DOM solution. Use the non-dom
	//		tools for Toolbar and Plugins.

	// summary:
	//		A plugin that allows for zooming the canvas in and out. An
	//		action-tool is added to the toolbar with plus, minus and 100%
	//		buttons.
	// example:
	//		|	<div dojoType="dojox.drawing.Toolbar" drawingId="drawingNode" class="drawingToolbar vertical">
	//		|		<div tool="dojox.drawing.tools.Line" selected="true">Line</div>
	//		|		<div plugin="dojox.drawing.ui.dom.Zoom" options="{zoomInc:.1,minZoom:.5,maxZoom:2}">Zoom</div>
	//		|	</div>

	Plugin,
	function(options){
		var cls = options.node.className;
		var txt = options.node.innerHTML;
		this.domNode = dojo.create("div", {id:"btnZoom", "class":"toolCombo"}, options.node, "replace");
		
		this.makeButton("ZoomIn", this.topClass);
		this.makeButton("Zoom100", this.midClass);
		this.makeButton("ZoomOut", this.botClass);
		
	},
	{
		type:"dojox.drawing.ui.dom.Zoom",

		// zoomInc: Float
		//		The amount of zoom that will occur upon each click.
		zoomInc:.1,

		// maxZoom: Number
		//		The maximum the canvas can be zoomed in. 10 = 1000%
		maxZoom:10,

		// minZoom: Float
		//		The most the canvas can be zoomed out. .1 = 10%
		minZoom:.1,

		// zoomFactor: [readonly] Float
		//		The current zoom amount
		zoomFactor:1,

		// baseClass: String
		//		The CSS class added to the Toolbar buttons
		baseClass:"drawingButton",

		// topClass: String
		//		The CSS class added to the top (or left) Toolbar button
		topClass:"toolComboTop",

		// midClass: String
		//		The CSS class added to the middle Toolbar button
		midClass:"toolComboMid",

		// botClass: String
		//		The CSS class added to the bottom (or right) Toolbar button
		botClass:"toolComboBot",

		makeButton: function(name, cls){
			// summary:
			//		Internal. Creates one of the buttons in the zoom-button set.

			var node = dojo.create("div", {id:"btn"+name, "class":this.baseClass+" "+cls,
				innerHTML:'<div title="Zoom In" class="icon icon'+name+'"></div>'}, this.domNode);
			
			dojo.connect(document, "mouseup", function(evt){
				dojo.stopEvent(evt);
				dojo.removeClass(node, "active");
			});
			dojo.connect(node, "mouseup", this, function(evt){
				dojo.stopEvent(evt);
				dojo.removeClass(node, "active");
				this["on"+name](); // this is what calls the methods below
			});
			dojo.connect(node, "mouseover", function(evt){
				dojo.stopEvent(evt);
				dojo.addClass(node, "hover");
			});
			dojo.connect(node, "mousedown", this, function(evt){
				dojo.stopEvent(evt);
				dojo.addClass(node, "active");
			});
			
			dojo.connect(node, "mouseout", this, function(evt){
				dojo.stopEvent(evt);
				dojo.removeClass(node, "hover");
			});
		
		},
		
		onZoomIn: function(/*Mouse Event*/evt){
			// summary:
			//		Handles zoom in.

			this.zoomFactor += this.zoomInc;
			this.zoomFactor = Math.min(this.zoomFactor, this.maxZoom);
			this.canvas.setZoom(this.zoomFactor);
			this.mouse.setZoom(this.zoomFactor);
		},
		onZoom100: function(/*Mouse Event*/evt){
			// summary:
			//		Zooms to 100%

			this.zoomFactor = 1;
			this.canvas.setZoom(this.zoomFactor);
			this.mouse.setZoom(this.zoomFactor);
		},
		onZoomOut: function(/*Mouse Event*/evt){
			// summary:
			//		Handles zoom out.

			this.zoomFactor -= this.zoomInc;
			this.zoomFactor = Math.max(this.zoomFactor, this.minZoom);
			this.canvas.setZoom(this.zoomFactor);
			this.mouse.setZoom(this.zoomFactor);
		}
	}
);

dojo.setObject("dojox.drawing.ui.dom.Zoom", Zoom);
//dojox.drawing.register(dojox.drawing.plugins.tools.Pan, "plugin");

return Zoom;
});