2013-10-16 13:41:20 +00:00
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<!--
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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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2013-10-16 13:41:20 +00:00
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Boundary example for mxGraph. This example demonstrates
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implementing boundary events in BPMN diagrams.
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-->
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<html>
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<head>
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<title>Boundary 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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// Disables the built-in context menu
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mxEvent.disableContextMenu(container);
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// Creates the graph inside the given container
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var graph = new mxGraph(container);
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// Sets the base style for all vertices
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var style = graph.getStylesheet().getDefaultVertexStyle();
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style[mxConstants.STYLE_ROUNDED] = true;
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style[mxConstants.STYLE_FILLCOLOR] = '#ffffff';
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style[mxConstants.STYLE_STROKECOLOR] = '#000000';
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style[mxConstants.STYLE_STROKEWIDTH] = '2';
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style[mxConstants.STYLE_FONTCOLOR] = '#000000';
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style[mxConstants.STYLE_FONTSIZE] = '12';
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style[mxConstants.STYLE_FONTSTYLE] = 1;
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graph.getStylesheet().putDefaultVertexStyle(style);
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// Removes folding icon for relative children
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graph.isCellFoldable = function(cell, collapse)
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{
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var childCount = this.model.getChildCount(cell);
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for (var i = 0; i < childCount; i++)
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{
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var child = this.model.getChildAt(cell, i);
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var geo = this.getCellGeometry(child);
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if (geo != null && geo.relative)
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{
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return false;
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}
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}
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return childCount > 0;
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};
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// Returns the relative position of the given child
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function getRelativePosition(state, dx, dy)
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{
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if (state != null)
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{
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var model = graph.getModel();
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var geo = model.getGeometry(state.cell);
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if (geo != null && geo.relative && !model.isEdge(state.cell))
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{
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var parent = model.getParent(state.cell);
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if (model.isVertex(parent))
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{
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var pstate = graph.view.getState(parent);
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if (pstate != null)
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{
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var scale = graph.view.scale;
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var x = state.x + dx;
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var y = state.y + dy;
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if (geo.offset != null)
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{
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x -= geo.offset.x * scale;
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y -= geo.offset.y * scale;
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}
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x = (x - pstate.x) / pstate.width;
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y = (y - pstate.y) / pstate.height;
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if (Math.abs(y - 0.5) <= Math.abs((x - 0.5) / 2))
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{
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x = (x > 0.5) ? 1 : 0;
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y = Math.min(1, Math.max(0, y));
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}
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else
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{
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x = Math.min(1, Math.max(0, x));
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y = (y > 0.5) ? 1 : 0;
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}
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return new mxPoint(x, y);
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}
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}
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}
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}
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return null;
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};
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// Replaces translation for relative children
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graph.translateCell = function(cell, dx, dy)
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{
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var rel = getRelativePosition(this.view.getState(cell), dx * graph.view.scale, dy * graph.view.scale);
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if (rel != null)
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{
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var geo = this.model.getGeometry(cell);
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if (geo != null && geo.relative)
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{
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geo = geo.clone();
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geo.x = rel.x;
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geo.y = rel.y;
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this.model.setGeometry(cell, geo);
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}
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}
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else
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{
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mxGraph.prototype.translateCell.apply(this, arguments);
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}
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};
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// Replaces move preview for relative children
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graph.graphHandler.getDelta = function(me)
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{
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var point = mxUtils.convertPoint(this.graph.container, me.getX(), me.getY());
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var delta = new mxPoint(point.x - this.first.x, point.y - this.first.y);
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if (this.cells != null && this.cells.length > 0 && this.cells[0] != null)
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{
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var state = this.graph.view.getState(this.cells[0]);
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var rel = getRelativePosition(state, delta.x, delta.y);
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if (rel != null)
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{
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var pstate = this.graph.view.getState(this.graph.model.getParent(state.cell));
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if (pstate != null)
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{
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delta = new mxPoint(pstate.x + pstate.width * rel.x - state.getCenterX(),
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pstate.y + pstate.height * rel.y - state.getCenterY());
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}
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}
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}
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return delta;
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};
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// Relative children cannot be removed from parent
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graph.graphHandler.shouldRemoveCellsFromParent = function(parent, cells, evt)
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{
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return cells.length == 0 && !cells[0].geometry.relative && mxGraphHandler.prototype.shouldRemoveCellsFromParent.apply(this, arguments);
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};
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// Enables moving of relative children
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graph.isCellLocked = function(cell)
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{
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return false;
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};
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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, 'Process', 60, 60, 90, 40);
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var v2 = graph.insertVertex(v1, null, 'in', 0, 0.5, 20, 20, 'fontSize=9;shape=ellipse;resizable=0;');
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v2.geometry.offset = new mxPoint(-10, -10);
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v2.geometry.relative = true;
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var v3 = graph.insertVertex(v1, null, 'out', 1, 0.5, 20, 20, 'fontSize=9;shape=ellipse;resizable=0;');
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v3.geometry.offset = new mxPoint(-10, -10);
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v3.geometry.relative = 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:relative;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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