js画图开发库--mxgraph--[groups-组.html] -优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_17920/article/details/82481989
js画图开发库--mxgraph--[groups-组.html]
子元素会继承父元素的隐藏、显示：
<!Doctype html>
<html xmlns=http://www.w3.org/1999/xhtml>
	<head>
	<meta http-equiv=Content-Type content="text/html;charset=utf-8">
	<title>组</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">
		//覆写检查是否根节点
		mxGraph.prototype.isValidRoot = function()
		{
			return false;
		};
		
		// 如果选择多个单元格， 不清除选择
		var graphHandlerMouseDown = mxGraphHandler.prototype.mouseDown;
		mxGraphHandler.prototype.mouseDown = function(sender, me)
		{
			graphHandlerMouseDown.apply(this, arguments);
	
			if (this.graph.isCellSelected(me.getCell()) && this.graph.getSelectionCount() > 1)
			{
				this.delayedSelection = false;
			}
		};
		
		// 覆写元素初始化事件
		var graphHandlerGetInitialCellForEvent = mxGraphHandler.prototype.getInitialCellForEvent;
		mxGraphHandler.prototype.getInitialCellForEvent = function(me)
		{
			var model = this.graph.getModel();
			var psel = model.getParent(this.graph.getSelectionCell());
			var cell = graphHandlerGetInitialCellForEvent.apply(this, arguments);
			var parent = model.getParent(cell);
			
			if (psel == null || (psel != cell && psel != parent))
			{
				while (!this.graph.isCellSelected(cell) && !this.graph.isCellSelected(parent) &&
						model.isVertex(parent) && !this.graph.isValidRoot(parent))
				{
					cell = parent;
					parent = this.graph.getModel().getParent(cell);
				}
			}
			
			return cell;
		};
		
		// 鼠标延迟选择子元素
		var graphHandlerIsDelayedSelection = mxGraphHandler.prototype.isDelayedSelection;
		mxGraphHandler.prototype.isDelayedSelection = function(cell)
		{
			var result = graphHandlerIsDelayedSelection.apply(this, arguments);
			var model = this.graph.getModel();
			var psel = model.getParent(this.graph.getSelectionCell());
			var parent = model.getParent(cell);
			
			if (psel == null || (psel != cell && psel != parent))
			{
				if (!this.graph.isCellSelected(cell) && model.isVertex(parent) && !this.graph.isValidRoot(parent))
				{
					result = true;
				}
			}
			
			return result;
		};
		
		// 元素组延迟选择
		mxGraphHandler.prototype.selectDelayed = function(me)
		{
			var cell = me.getCell();
			
			if (cell == null)
			{
				cell = this.cell;
			}
			
			var model = this.graph.getModel();
			var parent = model.getParent(cell);
			
			while (this.graph.isCellSelected(cell) && model.isVertex(parent) && !this.graph.isValidRoot(parent))
			{
				cell = parent;
				parent = model.getParent(cell);
			}
			
			this.graph.selectCellForEvent(cell, me.getEvent());
		};
	
		// 返回最后选定的父节点
		mxPanningHandler.prototype.getCellForPopupEvent = function(me)
		{
			var cell = me.getCell();
			var model = this.graph.getModel();
			var parent = model.getParent(cell);
			
			while (model.isVertex(parent) && !this.graph.isValidRoot(parent))
			{
				if (this.graph.isCellSelected(parent))
				{
					cell = parent;
				}
				
				parent = model.getParent(parent);
			}
			
			return cell;
		};
	
		// 程序在此启动
		function main(container)
		{
			// 浏览器兼容性检测
			if (!mxClient.isBrowserSupported())
			{
				mxUtils.error('Browser is not supported!', 200, false);
			}
			else
			{
				// 去锯齿效果
				mxRectangleShape.prototype.crisp = true;
				
				// 在容器中创建图形
				var graph = new mxGraph(container);
				graph.constrainChildren = false;
				graph.extendParents = false;
				graph.extendParentsOnAdd = false;

				// 可选择画布自适应
				//graph.setResizeContainer(true);
				
				// 启用浏览器默认右键下拉列表
				new mxRubberband(graph);
				
				// 创建默认窗体
				var parent = graph.getDefaultParent();
								
				// 开启更新事务
				graph.getModel().beginUpdate();
				try
				{
					var v1 = graph.insertVertex(parent, null, 'Hello,', 20, 20, 120, 60);
					var v2 = graph.insertVertex(v1, null, 'World!', 90, 20, 60, 20);
				}
				finally
				{
					// 结束更新事务
					graph.getModel().endUpdate();
				}
			}
		};
	</script>
</head>

<!-- 页面载入时启动程序 -->
<body οnlοad="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>