166 lines
4.8 KiB
HTML
166 lines
4.8 KiB
HTML
<!--
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Copyright (c) 2006-2013, JGraph Ltd
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Hoverstyle example for mxGraph. This example shows hot to change
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the style of a vertex on mouseover.
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-->
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<html>
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<head>
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<title>Hoverstyle 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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function updateStyle(state, hover)
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{
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if (hover)
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{
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state.style[mxConstants.STYLE_FILLCOLOR] = '#ff0000';
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}
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// Sets rounded style for both cases since the rounded style
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// is not set in the default style and is therefore inherited
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// once it is set, whereas the above overrides the default value
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state.style[mxConstants.STYLE_ROUNDED] = (hover) ? '1' : '0';
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state.style[mxConstants.STYLE_STROKEWIDTH] = (hover) ? '4' : '1';
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state.style[mxConstants.STYLE_FONTSTYLE] = (hover) ? mxConstants.FONT_BOLD : '0';
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};
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// Changes fill color to red on mouseover
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graph.addMouseListener(
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{
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currentState: null,
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previousStyle: null,
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mouseDown: function(sender, me)
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{
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if (this.currentState != null)
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{
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this.dragLeave(me.getEvent(), this.currentState);
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this.currentState = null;
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}
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},
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mouseMove: function(sender, me)
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{
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if (this.currentState != null && me.getState() == this.currentState)
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{
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return;
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}
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var tmp = graph.view.getState(me.getCell());
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// Ignores everything but vertices
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if (graph.isMouseDown || (tmp != null && !
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graph.getModel().isVertex(tmp.cell)))
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{
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tmp = null;
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}
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if (tmp != this.currentState)
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{
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if (this.currentState != null)
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{
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this.dragLeave(me.getEvent(), this.currentState);
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}
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this.currentState = tmp;
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if (this.currentState != null)
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{
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this.dragEnter(me.getEvent(), this.currentState);
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}
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}
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},
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mouseUp: function(sender, me) { },
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dragEnter: function(evt, state)
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{
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if (state != null)
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{
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this.previousStyle = state.style;
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state.style = mxUtils.clone(state.style);
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updateStyle(state, true);
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state.shape.apply(state);
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state.shape.redraw();
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if (state.text != null)
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{
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state.text.apply(state);
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state.text.redraw();
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}
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}
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},
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dragLeave: function(evt, state)
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{
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if (state != null)
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{
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state.style = this.previousStyle;
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updateStyle(state, false);
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state.shape.apply(state);
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state.shape.redraw();
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if (state.text != null)
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{
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state.text.apply(state);
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state.text.redraw();
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}
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}
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}
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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, '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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}
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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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