2012-08-31 11:06:48 +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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2012-08-31 11:06:48 +00:00
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Groups example for mxGraph. This example demonstrates using
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cells as parts of other cells.
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-->
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<html>
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<head>
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<title>Hello, World! 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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// Overrides check for valid roots
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mxGraph.prototype.isValidRoot = function()
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{
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return false;
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};
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// Don't clear selection if multiple cells selected
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var graphHandlerMouseDown = mxGraphHandler.prototype.mouseDown;
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mxGraphHandler.prototype.mouseDown = function(sender, me)
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{
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graphHandlerMouseDown.apply(this, arguments);
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if (this.graph.isCellSelected(me.getCell()) && this.graph.getSelectionCount() > 1)
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{
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this.delayedSelection = false;
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}
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};
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// Selects descendants before children selection mode
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var graphHandlerGetInitialCellForEvent = mxGraphHandler.prototype.getInitialCellForEvent;
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mxGraphHandler.prototype.getInitialCellForEvent = function(me)
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{
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var model = this.graph.getModel();
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var psel = model.getParent(this.graph.getSelectionCell());
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var cell = graphHandlerGetInitialCellForEvent.apply(this, arguments);
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var parent = model.getParent(cell);
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if (psel == null || (psel != cell && psel != parent))
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{
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while (!this.graph.isCellSelected(cell) && !this.graph.isCellSelected(parent) &&
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model.isVertex(parent) && !this.graph.isValidRoot(parent))
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{
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cell = parent;
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parent = this.graph.getModel().getParent(cell);
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}
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}
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return cell;
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};
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// Selection is delayed to mouseup if child selected
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var graphHandlerIsDelayedSelection = mxGraphHandler.prototype.isDelayedSelection;
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mxGraphHandler.prototype.isDelayedSelection = function(cell)
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{
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var result = graphHandlerIsDelayedSelection.apply(this, arguments);
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var model = this.graph.getModel();
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var psel = model.getParent(this.graph.getSelectionCell());
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var parent = model.getParent(cell);
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if (psel == null || (psel != cell && psel != parent))
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{
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if (!this.graph.isCellSelected(cell) && model.isVertex(parent) && !this.graph.isValidRoot(parent))
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{
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result = true;
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}
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}
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return result;
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};
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// Delayed selection of parent group
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mxGraphHandler.prototype.selectDelayed = function(me)
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{
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var cell = me.getCell();
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if (cell == null)
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{
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cell = this.cell;
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}
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var model = this.graph.getModel();
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var parent = model.getParent(cell);
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while (this.graph.isCellSelected(cell) && model.isVertex(parent) && !this.graph.isValidRoot(parent))
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{
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cell = parent;
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parent = model.getParent(cell);
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}
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this.graph.selectCellForEvent(cell, me.getEvent());
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};
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// Returns last selected ancestor
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2013-06-28 19:07:06 +00:00
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mxPopupMenuHandler.prototype.getCellForPopupEvent = function(me)
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2012-08-31 11:06:48 +00:00
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{
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var cell = me.getCell();
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var model = this.graph.getModel();
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var parent = model.getParent(cell);
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while (model.isVertex(parent) && !this.graph.isValidRoot(parent))
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{
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if (this.graph.isCellSelected(parent))
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{
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cell = parent;
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}
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parent = model.getParent(parent);
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}
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return cell;
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};
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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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graph.constrainChildren = false;
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graph.extendParents = false;
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graph.extendParentsOnAdd = false;
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// Uncomment the following if you want the container
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// to fit the size of the graph
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//graph.setResizeContainer(true);
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// Enables rubberband selection
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new mxRubberband(graph);
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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, 120, 60);
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var v2 = graph.insertVertex(v1, null, 'World!', 90, 20, 60, 20);
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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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<!-- Page passes the container for the graph to the program -->
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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');cursor:default;">
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</div>
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</body>
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</html>
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