165 lines
4.8 KiB
HTML
165 lines
4.8 KiB
HTML
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<!--
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Copyright (c) 2006-2013, JGraph Ltd
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Editing example for mxGraph. This example demonstrates using the in-place
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editor trigger to specify the editing value and write the new value into
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a specific field of the user object. Wrapping and DOM nodes as labels are
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also demonstrated here.
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-->
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<html>
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<head>
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<title>Editing 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.setHtmlLabels(true);
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// Adds handling of return and escape keystrokes for editing
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var keyHandler = new mxKeyHandler(graph);
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// Helper method that returns the fieldname to be used for
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// a mouse event
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var getFieldnameForEvent = function(cell, evt)
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{
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if (evt != null)
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{
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// Finds the relative coordinates inside the cell
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var point = mxUtils.convertPoint(graph.container,
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mxEvent.getClientX(evt), mxEvent.getClientY(evt));
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var state = graph.getView().getState(cell);
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if (state != null)
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{
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point.x -= state.x;
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point.y -= state.y;
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// Returns second if mouse in second half of cell
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if (point.y > state.height / 2)
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{
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return 'second';
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}
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}
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}
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return 'first';
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};
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// Returns a HTML representation of the cell where the
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// upper half is the first value, lower half is second
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// value
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graph.getLabel = function(cell)
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{
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var table = document.createElement('table');
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table.style.height = '100%';
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table.style.width = '100%';
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var body = document.createElement('tbody');
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var tr1 = document.createElement('tr');
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var td1 = document.createElement('td');
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td1.style.textAlign = 'center';
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td1.style.fontSize = '12px';
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td1.style.color = '#774400';
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mxUtils.write(td1, cell.value.first);
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var tr2 = document.createElement('tr');
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var td2 = document.createElement('td');
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td2.style.textAlign = 'center';
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td2.style.fontSize = '12px';
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td2.style.color = '#774400';
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mxUtils.write(td2, cell.value.second);
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tr1.appendChild(td1);
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tr2.appendChild(td2);
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body.appendChild(tr1);
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body.appendChild(tr2);
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table.appendChild(body);
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return table;
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};
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// Returns the editing value for the given cell and event
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graph.getEditingValue = function(cell, evt)
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{
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evt.fieldname = getFieldnameForEvent(cell, evt);
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return cell.value[evt.fieldname] || '';
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};
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// Sets the new value for the given cell and trigger
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graph.labelChanged = function(cell, newValue, trigger)
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{
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var name = (trigger != null) ? trigger.fieldname : null;
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if (name != null)
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{
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// Clones the user object for correct undo and puts
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// the new value in the correct field.
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var value = mxUtils.clone(cell.value);
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value[name] = newValue;
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newValue = value;
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mxGraph.prototype.labelChanged.apply(this, arguments);
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}
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};
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// Sample user objects with 2 fields
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var value = new Object();
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value.first = 'First value';
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value.second = 'Second value';
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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, value, 100, 60, 120, 80, 'overflow=fill;');
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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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<p>
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Double-click the upper/lower half of the cell to edit different fields of the user object.
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</p>
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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;position:relative;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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