143 lines
4.6 KiB
HTML
143 lines
4.6 KiB
HTML
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Copyright (c) 2006-2013, JGraph Ltd
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Labels example for mxGraph. This example demonstrates the use of wrapping
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and clipping for HTML labels of vertices, truncating labels to fit the
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size of a vertex, and manually placing vertex labels and relative children
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that act as "sublabels".
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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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graph.setTooltips(true);
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graph.htmlLabels = true;
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graph.vertexLabelsMovable = true;
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new mxRubberband(graph);
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new mxKeyHandler(graph);
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// Do not allow removing labels from parents
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graph.graphHandler.removeCellsFromParent = false;
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// Autosize labels on insert where autosize=1
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graph.autoSizeCellsOnAdd = true;
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// Allows moving of relative cells
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graph.isCellLocked = function(cell)
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{
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return this.isCellsLocked();
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};
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graph.isCellResizable = function(cell)
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{
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var geo = this.model.getGeometry(cell);
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return geo == null || !geo.relative;
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};
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// Truncates the label to the size of the vertex
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graph.getLabel = function(cell)
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{
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var label = (this.labelsVisible) ? this.convertValueToString(cell) : '';
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var geometry = this.model.getGeometry(cell);
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if (!this.model.isCollapsed(cell) && geometry != null && (geometry.offset == null ||
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(geometry.offset.x == 0 && geometry.offset.y == 0)) && this.model.isVertex(cell) &&
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geometry.width >= 2)
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{
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var style = this.getCellStyle(cell);
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var fontSize = style[mxConstants.STYLE_FONTSIZE] || mxConstants.DEFAULT_FONTSIZE;
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var max = geometry.width / (fontSize * 0.625);
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if (max < label.length)
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{
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return label.substring(0, max) + '...';
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}
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}
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return label;
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};
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// Enables wrapping for vertex labels
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graph.isWrapping = function(cell)
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{
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return this.model.isCollapsed(cell);
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};
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// Enables clipping of vertex labels if no offset is defined
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graph.isLabelClipped = function(cell)
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{
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var geometry = this.model.getGeometry(cell);
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return geometry != null && !geometry.relative && (geometry.offset == null ||
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(geometry.offset.x == 0 && geometry.offset.y == 0));
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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, 'vertexLabelsMovable', 20, 20, 80, 30);
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// Places sublabels inside the vertex
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var label11 = graph.insertVertex(v1, null, 'Label1', 0.5, 1, 0, 0, null, true);
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var label12 = graph.insertVertex(v1, null, 'Label2', 0.5, 0, 0, 0, null, true);
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var v2 = graph.insertVertex(parent, null, 'Wrapping and clipping is enabled only if the cell is collapsed, otherwise the label is truncated if there is no manual offset.', 200, 150, 80, 30);
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v2.geometry.alternateBounds = new mxRectangle(0, 0, 80, 30);
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var e1 = graph.insertEdge(parent, null, 'edgeLabelsMovable', v1, v2);
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// Places sublabels inside the vertex
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var label21 = graph.insertVertex(v2, null, 'Label1', 0.5, 1, 0, 0, null, true);
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var label22 = graph.insertVertex(v2, null, 'Label2', 0.5, 0, 0, 0, null, true);
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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="position:absolute;top:0px;left:0px;overflow:hidden;width:100%;height:100%;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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