js画图开发库-mxgraph-contexticons-悬停图标.html _HTML/CSS

js画图开发库--mxgraph--contexticons-悬停图标.html
?js画图开发库--mxgraph--contexticons-悬停图标.html
<!Doctype html>
<html xmlns=http://www.w3.org/1999/xhtml>
	<head>
	<meta http-equiv=Content-Type content="text/html;charset=utf-8">
	<title>悬停图标示例 for mxGraph</title>

	<!-- 如果本文件的包与src不是在同一个目录,就要将basepath设置到src目录下 -->
	<script type="text/javascript">
		mxBasePath = '../src';
	</script>

	<!-- 引入支持库文件 -->
	<script type="text/javascript" src="../src/js/mxClient.js"></script>
	<!-- 示例代码 -->
	<script type="text/javascript">
		// Defines a subclass for mxVertexHandler that adds a set of clickable icons to every selected vertex.
		//定义节点处理程序，每个节点在被点击时会显示节点图标。图表是以节点的子类形式存在的。
		function mxVertexToolHandler(state) {
			mxVertexHandler.apply(this, arguments);
		};

		mxVertexToolHandler.prototype = new mxVertexHandler();
		mxVertexToolHandler.prototype.constructor = mxVertexToolHandler;
		
		mxVertexToolHandler.prototype.domNode = null;
		//初始化
		mxVertexToolHandler.prototype.init = function()
		{
			mxVertexHandler.prototype.init.apply(this, arguments);

			//示例中使用div容器显示元素，这样做的目的就是解决IE浏览器中透明度的问题。
			this.domNode = document.createElement('div');
			this.domNode.style.position = 'absolute';
			this.domNode.style.whiteSpace = 'nowrap';
			var md = (mxClient.IS_TOUCH) ? 'touchstart' : 'mousedown';

			// 删除按钮
			var img = mxUtils.createImage('images/delete2.png');
			img.style.cursor = 'pointer';
			img.style.width = '16px';
			img.style.height = '16px';
			mxEvent.addListener(img, md,
				mxUtils.bind(this, function(evt)
				{
					// Disables dragging the image
					mxEvent.consume(evt);
				})
			);
			mxEvent.addListener(img, 'click',
				mxUtils.bind(this, function(evt)
				{
					this.graph.removeCells([this.state.cell]);
					mxEvent.consume(evt);
				})
			);
			this.domNode.appendChild(img);

			// 大小按钮
			var img = mxUtils.createImage('images/fit_to_size.png');
			img.style.cursor = 'se-resize';
			img.style.width = '16px';
			img.style.height = '16px';
			mxEvent.addListener(img, md,
				mxUtils.bind(this, function(evt)
				{
					this.start(mxEvent.getClientX(evt), mxEvent.getClientY(evt), 7);
					this.graph.isMouseDown = true;
					mxEvent.consume(evt);
				})
			);
			this.domNode.appendChild(img);

			// 移动按钮
			var img = mxUtils.createImage('images/connector.gif');
			img.style.cursor = 'move';
			img.style.width = '16px';
			img.style.height = '16px';
			mxEvent.addListener(img, md,
				mxUtils.bind(this, function(evt)
				{
					this.graph.graphHandler.start(this.state.cell,
						mxEvent.getClientX(evt), mxEvent.getClientY(evt));
					this.graph.graphHandler.cellWasClicked = true;
					this.graph.isMouseDown = true;
					mxEvent.consume(evt);
				})
			);
			this.domNode.appendChild(img);

			// 链接按钮
			var img = mxUtils.createImage('images/check.png');
			img.style.cursor = 'pointer';
			img.style.width = '16px';
			img.style.height = '16px';
			mxEvent.addListener(img, md,
				mxUtils.bind(this, function(evt)
				{
					var pt = mxUtils.convertPoint(this.graph.container,
							mxEvent.getClientX(evt), mxEvent.getClientY(evt));
					this.graph.connectionHandler.start(this.state, pt.x, pt.y);
					this.graph.isMouseDown = true;
					mxEvent.consume(evt);
				})
			);
			this.domNode.appendChild(img);
			//将节点添加到容器
			this.graph.container.appendChild(this.domNode);
			this.redrawTools();
		};
		//重绘
		mxVertexToolHandler.prototype.redraw = function()
		{
			mxVertexHandler.prototype.redraw.apply(this);
			this.redrawTools();
		};
		//重绘工具
		mxVertexToolHandler.prototype.redrawTools = function()
		{
			if (this.state != null && this.domNode != null)
			{
				var dy = (mxClient.IS_VML && document.compatMode == 'CSS1Compat') ? 20 : 4;
				this.domNode.style.left = (this.state.x + this.state.width - 56) + 'px';
				this.domNode.style.top = (this.state.y + this.state.height + dy) + 'px';
			}
		};
		//删除元素
		mxVertexToolHandler.prototype.destroy = function(sender, me)
		{
			mxVertexHandler.prototype.destroy.apply(this, arguments);

			if (this.domNode != null)
			{
				this.domNode.parentNode.removeChild(this.domNode);
				this.domNode = null;
			}
		};
		
		// 程序在此方法中启动
		function main(container) {
			// 检查浏览器支持
			if (!mxClient.isBrowserSupported()) {
				mxUtils.error('Browser is not supported!', 200, false);
			} else {
				// 在容器中创建图形
				var graph = new mxGraph(container);
				graph.setConnectable(true);
				graph.connectionHandler.createTarget = true;

				graph.createHandler = function(state) {
					if (state != null && 
							this.model.isVertex(state.cell)) {
						return new mxVertexToolHandler(state);
					}

					return mxGraph.prototype.createHandler.apply(this, arguments);
				};

				//还可以将图形设置成自适应大小
				//graph.setResizeContainer(true);
				
				//允许弹性选项
				//new mxRubberband(graph);
				
				// 在图形中创建默认组件 
				var parent = graph.getDefaultParent();
								
				
				//开启模型的事务
				graph.getModel().beginUpdate();
				try {
					//在图形中插入组件
					var v1 = graph.insertVertex(parent, null, 'Hello,', 20, 20, 80, 30);
					var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
					var e1 = graph.insertEdge(parent, null, '', v1, v2);
				}
				finally
				{
					//事务结束 
					graph.getModel().endUpdate();
				}
			}
		};
	</script>
</head>

<!-- 页面载入时启动程序 -->
<body onload="main(document.getElementById('graphContainer'))">

	<!-- 创建带网格壁纸和曲线的一个容器 -->
	<div id="graphContainer"
		style="overflow:hidden;width:321px;height:241px;background:url('editors/images/grid.gif');cursor:default;">
	</div>
</body>
</html>