182 lines
5.4 KiB
HTML
182 lines
5.4 KiB
HTML
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$Id: control.html,v 1.2 2011-09-06 12:45:05 gaudenz Exp $
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Copyright (c) 2006-2010, JGraph Ltd
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Control example for mxGraph. This example demonstrates adding
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controls to specific cells in a graph.
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-->
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<html>
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<head>
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<title>Control 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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// Enables crisp rendering of rectangles in SVG
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mxRectangleShape.prototype.crisp = true;
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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.setPanning(true);
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// Specifies the URL and size of the new control
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var deleteImage = new mxImage('editors/images/overlays/forbidden.png', 16, 16);
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// Overridden to add an additional control to the state at creation time
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mxCellRendererCreateControl = mxCellRenderer.prototype.createControl;
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mxCellRenderer.prototype.createControl = function(state)
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{
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mxCellRendererCreateControl.apply(this, arguments);
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var graph = state.view.graph;
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if (graph.getModel().isVertex(state.cell))
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{
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if (state.deleteControl == null)
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{
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var b = new mxRectangle(0, 0, deleteImage.width, deleteImage.height);
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state.deleteControl = new mxImageShape(b, deleteImage.src);
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state.deleteControl.dialect = graph.dialect;
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state.deleteControl.preserveImageAspect = false;
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this.initControl(state, state.deleteControl, false, function (evt)
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{
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if (graph.isEnabled())
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{
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graph.removeCells([state.cell]);
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mxEvent.consume(evt);
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}
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});
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}
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}
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else if (state.deleteControl != null)
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{
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state.deleteControl.destroy();
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state.deleteControl = null;
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}
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};
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// Helper function to compute the bounds of the control
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var getDeleteControlBounds = function(state)
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{
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if (state.deleteControl != null)
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{
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var oldScale = state.deleteControl.scale;
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var w = state.deleteControl.bounds.width / oldScale;
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var h = state.deleteControl.bounds.height / oldScale;
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var s = state.view.scale;
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return (state.view.graph.getModel().isEdge(state.cell)) ?
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new mxRectangle(state.x + state.width / 2 - w / 2 * s,
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state.y + state.height / 2 - h / 2 * s, w * s, h * s)
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: new mxRectangle(state.x + state.width - w * s,
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state.y, w * s, h * s);
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}
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return null;
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};
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// Overridden to update the scale and bounds of the control
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mxCellRendererRedrawControl = mxCellRenderer.prototype.redrawControl;
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mxCellRenderer.prototype.redrawControl = function(state)
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{
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mxCellRendererRedrawControl.apply(this, arguments);
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if (state.deleteControl != null)
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{
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var bounds = getDeleteControlBounds(state);
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var s = state.view.scale;
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if (state.deleteControl.scale != s || !state.deleteControl.bounds.equals(bounds))
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{
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state.deleteControl.bounds = bounds;
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state.deleteControl.scale = s;
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state.deleteControl.redraw();
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}
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}
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};
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// Overridden to remove the control if the state is destroyed
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mxCellRendererDestroy = mxCellRenderer.prototype.destroy;
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mxCellRenderer.prototype.destroy = function(state)
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{
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mxCellRendererDestroy.apply(this, arguments);
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if (state.deleteControl != null)
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{
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state.deleteControl.destroy();
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state.deleteControl = null;
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}
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};
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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, 80, 30);
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var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
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var e1 = graph.insertEdge(parent, null, '', v1, v2);
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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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graph.centerZoom = false;
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document.body.appendChild(mxUtils.button('Zoom In', function()
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{
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graph.zoomIn();
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}));
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document.body.appendChild(mxUtils.button('Zoom Out', function()
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{
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graph.zoomOut();
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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 grogram -->
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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:621px;height:441px;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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