button.js

dojo与json创建无限级树的时候,当在父结点下添加了一个新结点,我怎么让父亲结点重新调用json加载一下子结点内容.

/*
	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.Button");
dojo.provide("dojo.widget.html.Button");

dojo.require("dojo.lang.extras");
dojo.require("dojo.html");
dojo.require("dojo.style");
dojo.require("dojo.widget.*");
dojo.require("dojo.widget.HtmlWidget");

dojo.widget.defineWidget(
	"dojo.widget.html.Button",
	dojo.widget.HtmlWidget,
	{
		widgetType: "Button",
		isContainer: true,
	
		// Constructor arguments
		caption: "",
		disabled: false,
	
		templatePath: dojo.uri.dojoUri("src/widget/templates/HtmlButtonTemplate.html"),
		templateCssPath: dojo.uri.dojoUri("src/widget/templates/HtmlButtonTemplate.css"),
		
		// button images
		inactiveImg: "src/widget/templates/images/soriaButton-",
		activeImg: "src/widget/templates/images/soriaActive-",
		pressedImg: "src/widget/templates/images/soriaPressed-",
		disabledImg: "src/widget/templates/images/soriaDisabled-",
		width2height: 1.0/3.0,
	
		// attach points
		containerNode: null,
		leftImage: null,
		centerImage: null,
		rightImage: null,
	
		fillInTemplate: function(args, frag){
			if(this.caption != ""){
				this.containerNode.appendChild(document.createTextNode(this.caption));
			}
			dojo.html.disableSelection(this.containerNode);
		},

		postCreate: function(args, frag){
			this.sizeMyself();
		},
	
		sizeMyself: function(){
			// we cannot size correctly if any of our ancestors are hidden (display:none),
			// so temporarily attach to document.body
			if(this.domNode.parentNode){
				var placeHolder = document.createElement("span");
				dojo.dom.insertBefore(placeHolder, this.domNode);
			}
			dojo.html.body().appendChild(this.domNode);
			
			this.sizeMyselfHelper();
			
			// Put this.domNode back where it was originally
			if(placeHolder){
				dojo.dom.insertBefore(this.domNode, placeHolder);
				dojo.dom.removeNode(placeHolder);
			}
		},

		sizeMyselfHelper: function(){
			this.height = dojo.style.getOuterHeight(this.containerNode);
			this.containerWidth = dojo.style.getOuterWidth(this.containerNode);
			var endWidth= this.height * this.width2height;
	
			this.containerNode.style.left=endWidth+"px";
	
			this.leftImage.height = this.rightImage.height = this.centerImage.height = this.height;
			this.leftImage.width = this.rightImage.width = endWidth+1;
			this.centerImage.width = this.containerWidth;
			this.centerImage.style.left=endWidth+"px";
			this._setImage(this.disabled ? this.disabledImg : this.inactiveImg);

			if ( this.disabled ) {
				dojo.html.prependClass(this.domNode, "dojoButtonDisabled");
			} else {
				dojo.html.removeClass(this.domNode, "dojoButtonDisabled");
			}
				
			this.domNode.style.height=this.height + "px";
			this.domNode.style.width= (this.containerWidth+2*endWidth) + "px";
		},
	
		onMouseOver: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.domNode, "dojoButtonHover");
			this._setImage(this.activeImg);
		},
	
		onMouseDown: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.domNode, "dojoButtonDepressed");
			dojo.html.removeClass(this.domNode, "dojoButtonHover");
			this._setImage(this.pressedImg);
		},
		onMouseUp: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.domNode, "dojoButtonHover");
			dojo.html.removeClass(this.domNode, "dojoButtonDepressed");
			this._setImage(this.activeImg);
		},
	
		onMouseOut: function(e){
			if( this.disabled ){ return; }
			dojo.html.removeClass(this.domNode, "dojoButtonHover");
			this._setImage(this.inactiveImg);
		},
	
		buttonClick: function(e){
			if( !this.disabled ) { this.onClick(e); }
		},

		onClick: function(e) { },

		_setImage: function(prefix){
			this.leftImage.src=dojo.uri.dojoUri(prefix + "l.gif");
			this.centerImage.src=dojo.uri.dojoUri(prefix + "c.gif");
			this.rightImage.src=dojo.uri.dojoUri(prefix + "r.gif");
		},
		
		_toggleMenu: function(menuId){
			var menu = dojo.widget.getWidgetById(menuId);
			if ( !menu ) { return; }
	
			if ( menu.open && !menu.isShowingNow) {
				var pos = dojo.style.getAbsolutePosition(this.domNode, false);
				menu.open(pos.x, pos.y+this.height, this);
			} else if ( menu.close && menu.isShowingNow ){
				menu.close();
			} else {
				menu.toggle();
			}
		},
		
		setCaption: function(content){
			this.caption=content;
			this.containerNode.innerHTML=content;
			this.sizeMyself();
		},
		
		setDisabled: function(disabled){
			this.disabled=disabled;
			this.sizeMyself();
		}
	});

/**** DropDownButton - push the button and a menu shows up *****/
dojo.widget.defineWidget(
	"dojo.widget.html.DropDownButton",
	dojo.widget.html.Button,
	{
		widgetType: "DropDownButton",
	
		menuId: "",

		arrow: null,
	
		downArrow: "src/widget/templates/images/whiteDownArrow.gif",
		disabledDownArrow: "src/widget/templates/images/whiteDownArrow.gif",
	
		fillInTemplate: function(args, frag){
			dojo.widget.html.DropDownButton.superclass.fillInTemplate.call(this, args, frag);
	
			this.arrow = document.createElement("img");
			dojo.html.setClass(this.arrow, "downArrow");
		},

		sizeMyselfHelper: function(){
			// draw the arrow (todo: why is the arror in containerNode rather than outside it?)
			this.arrow.src = dojo.uri.dojoUri(this.disabled ? this.disabledDownArrow : this.downArrow);
			this.containerNode.appendChild(this.arrow);

			dojo.widget.html.DropDownButton.superclass.sizeMyselfHelper.call(this);
		},

		onClick: function (e){
			this._toggleMenu(this.menuId);
		}
	});

/**** ComboButton - left side is normal button, right side shows menu *****/
dojo.widget.defineWidget(
	"dojo.widget.html.ComboButton",
	dojo.widget.html.Button,
	{
		widgetType: "ComboButton",
	
		menuId: "",
	
		templatePath: dojo.uri.dojoUri("src/widget/templates/HtmlComboButtonTemplate.html"),
	
		// attach points
		leftPart: null,
		rightPart: null,
		arrowBackgroundImage: null,
	
		// constants
		splitWidth: 2,		// pixels between left&right part of button
		arrowWidth: 5,		// width of segment holding down arrow
	
		sizeMyselfHelper: function(e){
			this.height = dojo.style.getOuterHeight(this.containerNode);
			this.containerWidth = dojo.style.getOuterWidth(this.containerNode);
			var endWidth= this.height/3;
	
			// left part
			this.leftImage.height = this.rightImage.height = this.centerImage.height = 
				this.arrowBackgroundImage.height = this.height;
			this.leftImage.width = endWidth+1;
			this.centerImage.width = this.containerWidth;
			this.leftPart.style.height = this.height + "px";
			this.leftPart.style.width = endWidth + this.containerWidth + "px";
			this._setImageL(this.disabled ? this.disabledImg : this.inactiveImg);
	
			// right part
			this.arrowBackgroundImage.width=this.arrowWidth;
			this.rightImage.width = endWidth+1;
			this.rightPart.style.height = this.height + "px";
			this.rightPart.style.width = this.arrowWidth + endWidth + "px";
			this._setImageR(this.disabled ? this.disabledImg : this.inactiveImg);
	
			// outer container
			this.domNode.style.height=this.height + "px";
			var totalWidth = this.containerWidth+this.splitWidth+this.arrowWidth+2*endWidth;
			this.domNode.style.width= totalWidth + "px";
		},
	
		/** functions on left part of button**/
		leftOver: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.leftPart, "dojoButtonHover");
			this._setImageL(this.activeImg);
		},
	
		leftDown: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.leftPart, "dojoButtonDepressed");
			dojo.html.removeClass(this.leftPart, "dojoButtonHover");
			this._setImageL(this.pressedImg);
		},
		leftUp: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.leftPart, "dojoButtonHover");
			dojo.html.removeClass(this.leftPart, "dojoButtonDepressed");
			this._setImageL(this.activeImg);
		},
	
		leftOut: function(e){
			if( this.disabled ){ return; }
			dojo.html.removeClass(this.leftPart, "dojoButtonHover");
			this._setImageL(this.inactiveImg);
		},
	
		leftClick: function(e){
			if ( !this.disabled ) {
				this.onClick(e);
			}
		},
	
		_setImageL: function(prefix){
			this.leftImage.src=dojo.uri.dojoUri(prefix + "l.gif");
			this.centerImage.src=dojo.uri.dojoUri(prefix + "c.gif");
		},
	
		/*** functions on right part of button ***/
		rightOver: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.rightPart, "dojoButtonHover");
			this._setImageR(this.activeImg);
		},
	
		rightDown: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.rightPart, "dojoButtonDepressed");
			dojo.html.removeClass(this.rightPart, "dojoButtonHover");
			this._setImageR(this.pressedImg);
		},
		rightUp: function(e){
			if( this.disabled ){ return; }
			dojo.html.prependClass(this.rightPart, "dojoButtonHover");
			dojo.html.removeClass(this.rightPart, "dojoButtonDepressed");
			this._setImageR(this.activeImg);
		},
	
		rightOut: function(e){
			if( this.disabled ){ return; }
			dojo.html.removeClass(this.rightPart, "dojoButtonHover");
			this._setImageR(this.inactiveImg);
		},
	
		rightClick: function(e){
			if( this.disabled ){ return; }
			this._toggleMenu(this.menuId);
		},
	
		_setImageR: function(prefix){
			this.arrowBackgroundImage.src=dojo.uri.dojoUri(prefix + "c.gif");
			this.rightImage.src=dojo.uri.dojoUri(prefix + "r.gif");
		}
	});