191 lines
6.0 KiB
HTML
191 lines
6.0 KiB
HTML
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$Id: secondlabel.html,v 1.8 2012-01-08 10:28:37 gaudenz Exp $
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Copyright (c) 2006-2010, JGraph Ltd
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Second label example for mxGraph. This example demonstrates how to
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add another string label to vertices.
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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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// 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 the folding icon
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graph.isCellFoldable = function(cell)
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{
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return false;
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}
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var secondLabelVisible = true;
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// Hook for returning shape number for a given cell
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graph.getSecondLabel = function(cell)
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{
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if (!this.model.isEdge(cell))
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{
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// Possible to return any string here
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return "ID="+cell.id;
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}
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return null;
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};
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var relativeChildVerticesVisible = true;
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// Overrides method to hide relative child vertices
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graph.isCellVisible = function(cell)
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{
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return !this.model.isVertex(cell) || cell.geometry == null ||
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!cell.geometry.relative ||
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cell.geometry.relative == relativeChildVerticesVisible;
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};
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// Creates the shape for the shape number and puts it into the draw pane
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var createShape = graph.cellRenderer.createShape;
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graph.cellRenderer.createShape = function(state)
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{
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createShape.apply(this, arguments);
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if (secondLabelVisible &&
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!state.cell.geometry.relative)
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{
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var secondLabel = graph.getSecondLabel(state.cell);
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if (secondLabel != null &&
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state.shape != null &&
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state.secondLabel == null)
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{
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state.secondLabel = new mxText(secondLabel, new mxRectangle(),
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mxConstants.ALIGN_LEFT, mxConstants.ALIGN_BOTTOM);
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// Styles the label
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state.secondLabel.color = 'black';
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state.secondLabel.family = 'Verdana';
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state.secondLabel.size = 8;
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state.secondLabel.fontStyle = mxConstants.FONT_ITALIC;
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state.secondLabel.background = 'yellow';
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state.secondLabel.border = 'black';
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state.secondLabel.dialect = state.shape.dialect;
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state.secondLabel.init(state.view.getDrawPane());
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}
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}
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};
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// Redraws the shape number after the cell has been moved/resized
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var redraw = graph.cellRenderer.redraw;
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graph.cellRenderer.redraw = function(state)
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{
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redraw.apply(this, arguments);
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if (state.shape != null &&
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state.secondLabel != null)
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{
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var scale = graph.getView().getScale();
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var bounds = new mxRectangle(state.x + state.width - 8 * scale, state.y + 8 * scale, 0, 0);
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state.secondLabel.value = graph.getSecondLabel(state.cell);
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state.secondLabel.scale = scale;
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state.secondLabel.bounds = bounds;
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state.secondLabel.redraw();
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}
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};
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// Destroys the shape number
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var destroy = graph.cellRenderer.destroy;
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graph.cellRenderer.destroy = function(state)
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{
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destroy.apply(this, arguments);
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if (state.secondLabel != null)
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{
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state.secondLabel.destroy();
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state.secondLabel = null;
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}
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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,', 30, 20, 80, 30);
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// Alternative solution of creating a second label by creating a realtive child vertex
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// with size (0, 0). This will not be selectable and only the label colors can be used
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// for coloring as the actual shape will have zero size.
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var v11 = graph.insertVertex(v1, null, 'World', 1, 1, 0, 0, 'align=left;verticalAlign=top;labelBackgroundColor=red;labelBorderColor=black', true);
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v11.geometry.offset = new mxPoint(-8, -8);
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var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
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// Another alternative solution of creating a second label as a relative child vertex
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// but this time with an automatic size so that the cell is actually selectable and
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// the background is painted as a shape.
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var v21 = graph.insertVertex(v2, null, 'World', 1, 1, 0, 0, 'align=left;verticalAlign=top;fillColor=red;rounded=1;spacingLeft=4;spacingRight=4', true);
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v21.geometry.offset = new mxPoint(-8, -8);
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graph.updateCellSize(v21);
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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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// Adds a button to execute the layout
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document.body.insertBefore(mxUtils.button('Toggle Child Vertices',
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function(evt)
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{
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relativeChildVerticesVisible = !relativeChildVerticesVisible;
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graph.refresh();
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}
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), document.body.firstChild);
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// Adds a button to execute the layout
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document.body.insertBefore(mxUtils.button('Toggle IDs',
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function(evt)
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{
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secondLabelVisible = !secondLabelVisible;
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graph.refresh();
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}
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), document.body.firstChild);
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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: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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