fisheyelist.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.

		//
		// set the sizes
		//

		for(var i=0; i<this.itemCount; i++){

			var weight = this.weightAt(cen, i);

			if (weight < 0){weight = 0;}

			this.setitemsize(i, weight * off_weight);
		}

		//
		// set the positions
		//

		var main_p = Math.round(cen);
		var offset = 0;

		if (cen < 0){
			main_p = 0;

		}else if (cen > this.itemCount - 1){

			main_p = this.itemCount -1;

		}else{

			offset = (cen - main_p) * ((this.isHorizontal ? this.itemWidth : this.itemHeight) - this.children[main_p].sizeMain);
		}

		this.positionElementsFrom(main_p, offset);
	},

	weightAt: function(cen, i){

		var dist = Math.abs(cen - i);

		var limit = ((cen - i) > 0) ? this.children[i].effectRangeRght : this.children[i].effectRangeLeft;

		return (dist > limit) ? 0 : (1 - dist / limit);
	},

	positionFromNode: function(p, w){

		//
		// we need to grow all the nodes growing out from node 'i'
		//

		this.setitemsize(p, w);

		var wx = w;
		for(var i=p; i<this.itemCount; i++){
			wx = 0.8 * wx;
			this.setitemsize(i, wx);
		}

		var wx = w;
		for(var i=p; i>=0; i--){
			wx = 0.8 * wx;
			this.setitemsize(i, wx);
		}
	},

	setitemsize: function(p, scale){
		scale *= this.timerScale;
		var w = Math.round(this.itemWidth  + ((this.itemMaxWidth  - this.itemWidth ) * scale));
		var h = Math.round(this.itemHeight + ((this.itemMaxHeight - this.itemHeight) * scale));

		if (this.isHorizontal){

			this.children[p].sizeW = w;
			this.children[p].sizeH = h;

			this.children[p].sizeMain = w;
			this.children[p].sizeOff  = h;

			var y = 0;

			if (this.anchorEdge == this.EDGE.TOP){

				y = (this.children[p].cenY - (this.itemHeight / 2));

			}else if (this.anchorEdge == this.EDGE.BOTTOM){

				y = (this.children[p].cenY - (h - (this.itemHeight / 2)));

			}else{

				y = (this.children[p].cenY - (h / 2));
			}

			this.children[p].usualX = Math.round(this.children[p].cenX - (w / 2));
			
			this.children[p].domNode.style.top  = y + 'px';

			this.children[p].domNode.style.left  = this.children[p].usualX + 'px';

		}else{

			this.children[p].sizeW = w;
			this.children[p].sizeH = h;

			this.children[p].sizeOff  = w;
			this.children[p].sizeMain = h;

			var x = 0;

			if (this.anchorEdge == this.EDGE.LEFT){

				x = this.children[p].cenX - (this.itemWidth / 2);

			}else if (this.anchorEdge == this.EDGE.RIGHT){

				x = this.children[p].cenX - (w - (this.itemWidth / 2));
			}else{

				x = this.children[p].cenX - (w / 2);
			}

			this.children[p].domNode.style.left = x + 'px';
			this.children[p].usualY = Math.round(this.children[p].cenY - (h / 2));

			this.children[p].domNode.style.top  = this.children[p].usualY + 'px';
		}

		this.children[p].domNode.style.width  = w + 'px';
		this.children[p].domNode.style.height = h + 'px';

		if (this.children[p].svgNode){
			this.children[p].svgNode.setSize(w, h);
		}
	},

	positionElementsFrom: function(p, offset){

		var pos = 0;

		if (this.isHorizontal){
			pos = Math.round(this.children[p].usualX + offset);
			this.children[p].domNode.style.left = pos + 'px';
		}else{
			pos = Math.round(this.children[p].usualY + offset);
			this.children[p].domNode.style.top = pos + 'px';
		}
		this.positionLabel(this.children[p]);


		//
		// position before
		//

		var bpos = pos;

		for(var i=p-1; i>=0; i--){

			bpos -= this.children[i].sizeMain;

			if (this.isHorizontal){
				this.children[i].domNode.style.left = bpos + 'px';
			}else{
				this.children[i].domNode.style.top = bpos + 'px';
			}
			this.positionLabel(this.children[i]);
		}

		//
		// position after
		//

		var apos = pos;

		for(var i=p+1; i<this.itemCount; i++){

			apos += this.children[i-1].sizeMain;

			if (this.isHorizontal){
				this.children[i].domNode.style.left = apos + 'px';
			}else{
				this.children[i].domNode.style.top = apos + 'px';
			}
			this.positionLabel(this.children[i]);
		}

	},

	positionLabel: function(itm){

		var x = 0;
		var y = 0;
		
		var labelW = dojo.style.getOuterWidth(itm.lblNode);
		var labelH = dojo.style.getOuterHeight(itm.lblNode);

		if (this.labelEdge == this.EDGE.TOP){
			x = Math.round((itm.sizeW / 2) - (labelW / 2));
			y = -labelH;
		}

		if (this.labelEdge == this.EDGE.BOTTOM){
			x = Math.round((itm.sizeW / 2) - (labelW / 2));
			y = itm.sizeH;
		}

		if (this.labelEdge == this.EDGE.LEFT){
			x = -labelW;
			y = Math.round((itm.sizeH / 2) - (labelH / 2));
		}

		if (this.labelEdge == this.EDGE.RIGHT){
			x = itm.sizeW;
			y = Math.round((itm.sizeH / 2) - (labelH / 2));
		}

		itm.lblNode.style.left = x + 'px';
		itm.lblNode.style.top  = y + 'px';
	},

	calcHitGrid: function(){

		var pos = dojo.style.getAbsolutePosition(this.domNode, true);

		this.hitX1 = pos.x - this.proximityLeft;
		this.hitY1 = pos.y - this.proximityTop;
		this.hitX2 = this.hitX1 + this.totalWidth;
		this.hitY2 = this.hitY1 + this.totalHeight;

		//dojo.debug(this.hitX1+','+this.hitY1+' // '+this.hitX2+','+this.hitY2);
	},

	toEdge: function(inp, def){
		return this.EDGE[inp.toUpperCase()] || def;
	},
	
	// slowly expand the image to user specified max size
	expandSlowly: function(){
		if( !this.isOver ){ return; }
		this.timerScale += 0.2;
		this.paint();
		if ( this.timerScale<1.0 ) {
			dojo.lang.setTimeout(this, "expandSlowly", 10);
		}
	},

	destroy: function(){
		// need to disconnect when we destroy
		dojo.event.disconnect(document.documentElement, "onmouseout", this, "onBodyOut");
		dojo.event.disconnect(document.documentElement, "onmousemove", this, "mouseHandler");
		dojo.widget.html.FisheyeList.superclass.destroy.call(this);
	}
});

dojo.widget.html.FisheyeListItem = function(){
	dojo.widget.HtmlWidget.call(this);
}
dojo.inherits(dojo.widget.html.FisheyeListItem, dojo.widget.HtmlWidget);

dojo.lang.extend(dojo.widget.html.FisheyeListItem, {
	widgetType: "FisheyeListItem",
	
	// Constructor arguments
	iconSrc: "",
	svgSrc: "",
	caption: "",

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

	templateString:
		'<div class="dojoHtmlFisheyeListItem">' +
		'  <img class="dojoHtmlFisheyeListItemImage" dojoAttachPoint="imgNode" dojoAttachEvent="onMouseOver;onMouseOut;onClick">' +
		'  <div class="dojoHtmlFisheyeListItemLabel" dojoAttachPoint="lblNode"></div>' +
		'</div>',
	
	imgNode: null,

	fillInTemplate: function() {
		//
		// set image
		// TODO: turn on/off SVG support based on browser version.
		// this.parent.enableCrappySvgSupport is not available to this function
		//
		if (this.svgSrc != ""){
			this.svgNode = this.createSvgNode(this.svgSrc);
			this.domNode.appendChild(this.svgNode);
			this.imgNode.style.display = 'none';
		} else if((this.iconSrc.toLowerCase().substring(this.iconSrc.length-4)==".png")&&(dojo.render.html.ie)){
			this.imgNode.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+this.iconSrc+"', sizingMethod='scale')";
			this.imgNode.src = this.blankImgPath.toString();
		} else {
			this.imgNode.src = this.iconSrc;
		}

		//
		// Label
		//
		if ( this.lblNode ) {
			this.lblNode.appendChild(document.createTextNode(this.caption));
		}
		dojo.html.disableSelection(this.domNode);
	},
	
	createSvgNode: function(src){

		var elm = document.createElement('embed');
		elm.src = src;
		elm.type = 'image/svg+xml';
		//elm.style.border = '1px solid black';
		elm.style.width = '1px';
		elm.style.height = '1px';
		elm.loaded = 0;
		elm.setSizeOnLoad = false;

		elm.onload = function(){
			this.svgRoot = this.getSVGDocument().rootElement;
			this.svgDoc = this.getSVGDocument().documentElement;
			this.zeroWidth = this.svgRoot.width.baseVal.value;
			this.zeroHeight = this.svgRoot.height.baseVal.value;
			this.loaded = true;

			if (this.setSizeOnLoad){
				this.setSize(this.setWidth, this.setHeight);
			}
		}

		elm.setSize = function(w, h){
			if (!this.loaded){
				this.setWidth = w;
				this.setHeight = h;
				this.setSizeOnLoad = true;
				return;
			}

			this.style.width = w+'px';
			this.style.height = h+'px';
			this.svgRoot.width.baseVal.value = w;
			this.svgRoot.height.baseVal.value = h;

			var scale_x = w / this.zeroWidth;
			var scale_y = h / this.zeroHeight;

			for(var i=0; i<this.svgDoc.childNodes.length; i++){
				if (this.svgDoc.childNodes[i].setAttribute){
					this.svgDoc.childNodes[i].setAttribute( "transform", "scale("+scale_x+","+scale_y+")" );
				}
			}
		}

		return elm;
	},

	onMouseOver: function(e) {
		// in conservative mode, don't activate the menu until user mouses over an icon
		if( !this.parent.isOver ){
			this.parent.setActive(e);
		}
		if ( this.caption != "" ) {
			dojo.html.addClass(this.lblNode, "selected");
			this.parent.positionLabel(this);
		}
	},
	
	onMouseOut: function() {
		dojo.html.removeClass(this.lblNode, "selected");
	},

	onClick: function() {
	}
});