2012-05-21 20:32:26 +00:00
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2013-10-28 08:56:36 +00:00
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Copyright (c) 2006-2013, JGraph Ltd
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2012-05-21 20:32:26 +00:00
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Dynamic Style example for mxGraph. This example demonstrates changing
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the style of a cell dynamically by overriding mxGraphModel.getStyle.
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-->
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<html>
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<head>
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<title>Dynamic Style example for mxGraph</title>
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<!-- Sets the basepath for the library if not in same directory -->
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<script type="text/javascript">
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mxBasePath = '../src';
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</script>
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<!-- Loads and initializes the library -->
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<script type="text/javascript" src="../src/js/mxClient.js"></script>
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<!-- Example code -->
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<script type="text/javascript">
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// Program starts here. Creates a sample graph in the
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// DOM node with the specified ID. This function is invoked
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// from the onLoad event handler of the document (see below).
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function main(container)
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{
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// Checks if the browser is supported
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if (!mxClient.isBrowserSupported())
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{
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// Displays an error message if the browser is not supported.
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mxUtils.error('Browser is not supported!', 200, false);
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}
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else
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{
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// Creates the graph inside the given container
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var graph = new mxGraph(container);
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// Disables moving of edge labels in this examples
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graph.edgeLabelsMovable = false;
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// Enables rubberband selection
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new mxRubberband(graph);
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// Needs to set a flag to check for dynamic style changes,
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// that is, changes to styles on cells where the style was
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// not explicitely changed using mxStyleChange
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graph.getView().updateStyle = true;
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// Overrides mxGraphModel.getStyle to return a specific style
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// for edges that reflects their target terminal (in this case
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// the strokeColor will be equal to the target's fillColor).
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var previous = graph.model.getStyle;
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graph.model.getStyle = function(cell)
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{
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if (cell != null)
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{
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var style = previous.apply(this, arguments);
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if (this.isEdge(cell))
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{
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var target = this.getTerminal(cell, false);
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if (target != null)
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{
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var state = graph.getView().getState(target);
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var targetStyle = (state != null) ? state.style : graph.getCellStyle(target);
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var fill = mxUtils.getValue(targetStyle, mxConstants.STYLE_FILLCOLOR);
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if (fill != null)
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{
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style += ';strokeColor='+fill;
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}
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}
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}
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else if (this.isVertex(cell))
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{
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var geometry = this.getGeometry(cell);
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if (geometry != null &&
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geometry.width > 80)
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{
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style += ';fillColor=green';
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}
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}
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return style;
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}
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return null;
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};
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// Gets the default parent for inserting new cells. This
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// is normally the first child of the root (ie. layer 0).
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var parent = graph.getDefaultParent();
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// Adds cells to the model in a single step
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graph.getModel().beginUpdate();
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try
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{
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var v1 = graph.insertVertex(parent, null, 'Hello,', 20, 20, 80, 30, 'fillColor=green');
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var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30, 'fillColor=blue');
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var v3 = graph.insertVertex(parent, null, 'World!', 20, 150, 80, 30, 'fillColor=red');
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var e1 = graph.insertEdge(parent, null, 'Connect', v1, v2, 'perimeterSpacing=4;strokeWidth=4;labelBackgroundColor=white;fontStyle=1');
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}
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finally
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{
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// Updates the display
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graph.getModel().endUpdate();
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}
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}
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};
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</script>
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</head>
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2012-07-20 10:35:30 +00:00
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<!-- Page passes the container for the graph to the program -->
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2012-05-21 20:32:26 +00:00
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<body onload="main(document.getElementById('graphContainer'))">
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<!-- Creates a container for the graph with a grid wallpaper -->
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<div id="graphContainer"
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style="overflow:hidden;width:321px;height:241px;background:url('editors/images/grid.gif')">
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</div>
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</body>
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</html>
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