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