155 lines
6.1 KiB
HTML
155 lines
6.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>GoJS Visual Tree</title>
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<meta name="description" content="Show the visual elements of a simple diagram as a tree diagram -- each Node is data bound to an element of the other Diagram." />
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<!-- Copyright 1998-2017 by Northwoods Software Corporation. -->
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<meta charset="UTF-8">
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<script src="../release/go.js"></script>
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<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
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<script id="code">
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function init() {
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if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
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var $ = go.GraphObject.make; // for conciseness in defining templates
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myDiagram =
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$(go.Diagram, "myDiagramDiv",
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{ // start everything in the middle of the viewport
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initialContentAlignment: go.Spot.Center,
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"undoManager.isEnabled": true
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});
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// define the "sample" Node template
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myDiagram.nodeTemplate =
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$(go.Node, "Auto",
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new go.Binding("location"),
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$(go.Shape, "RoundedRectangle", // define the node's outer shape
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{ fill: "white", strokeWidth: 0 },
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new go.Binding("fill", "color")),
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$(go.TextBlock, // define the node's text
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{ margin: 5 },
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new go.Binding("text", "key"))
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);
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myDiagram.linkTemplate =
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$(go.Link, go.Link.Bezier,
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$(go.Shape, { strokeWidth: 1.5 }),
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$(go.Shape, { toArrow: "Standard" })
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);
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myDiagram.model = new go.GraphLinksModel([
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{ key: "Alpha", color: "lightblue", location: new go.Point(0, 0) },
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{ key: "Beta", color: "pink", location: new go.Point(60, 80) }
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],[
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{ from: "Alpha", to: "Beta" },
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{ from: "Beta", to: "Alpha"}
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]);
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// Now we can initialize a Diagram that looks at the visual tree that constitutes the Diagram above.
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myVisualTree =
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$(go.Diagram, "myVisualTree",
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{
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initialContentAlignment: go.Spot.Left,
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initialAutoScale: go.Diagram.Uniform,
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isReadOnly: true, // do not allow users to modify or select in this view
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allowSelect: false,
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layout: $(go.TreeLayout, { nodeSpacing: 5 }) // automatically laid out as a tree
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});
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myVisualTree.nodeTemplate =
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$(go.Node, "Auto",
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$(go.Shape, { fill: "darkkhaki", stroke: null }), // assume a dark background
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$(go.TextBlock,
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{
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font: "bold 13px Helvetica, bold Arial, sans-serif",
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stroke: "black",
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margin: 3
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},
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// bind the text to the Diagram/Layer/Part/GraphObject converted to a string
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new go.Binding("text", "", function (x) {
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// if the node represents a link, be sure to include the "to/from" data for that link
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if (x instanceof go.Link) {
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var s = "Link#" + x.data.__gohashid;
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s += "(" + x.data.from + " to " + x.data.to + ")";
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return s;
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}
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else return x.toString();
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}))
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);
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myVisualTree.linkTemplate =
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$(go.Link,
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$(go.Shape, { stroke: "darkkhaki", strokeWidth: 2 })
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);
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drawVisualTree();
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}
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function drawVisualTree() {
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var visualNodeDataArray = [];
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// recursively walk the visual tree, collecting objects as we go
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function traverseVisualTree(obj, parent) {
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obj.vtkey = visualNodeDataArray.length;
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visualNodeDataArray.push(obj);
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if (parent) {
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obj.parentKey = parent.vtkey;
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}
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if (obj instanceof go.Diagram) {
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var lit = obj.layers;
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while (lit.next()) traverseVisualTree(lit.value, obj);
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} else if (obj instanceof go.Layer) {
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var pit = obj.parts;
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while (pit.next()) traverseVisualTree(pit.value, obj);
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} else if (obj instanceof go.Panel) {
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var eit = obj.elements;
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while (eit.next()) traverseVisualTree(eit.value, obj);
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}
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}
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traverseVisualTree(myDiagram, null);
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myVisualTree.model =
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go.GraphObject.make(go.TreeModel,
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{
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nodeKeyProperty: "vtkey",
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nodeParentKeyProperty: "parentKey",
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nodeDataArray: visualNodeDataArray
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});
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}
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</script>
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</head>
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<body onload="init()">
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<div id="sample">
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<b>myDiagram</b>, the diagram being inspected:<br />
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<div id="myDiagramDiv" style="border: 1px solid black; width: 300px; height: 200px"></div>
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<br />
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<input type="button" onclick="drawVisualTree()" value="Draw Visual Tree" />
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<br />
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<br />
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<b>myVisualTree</b>, showing the Layers, Nodes and Links that are in <b>myDiagram</b> above:<br />
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<div id="myVisualTree" style="border: 1px solid black; background:#1F4963; width: 100%; height: 300px"></div>
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<p>
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This sample shows the actual visual tree of a running Diagram.
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The Diagram that we inspect is named "myDiagramDiv" and initially contains two simple Nodes and two Links.
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The Diagram below it is named "myVisualTree" and shows the visual tree of "myDiagramDiv".
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</p>
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<p>
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You can also try selecting, copying, and deleting parts in <b>myDiagram</b>
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and then click on "Draw Visual Tree" again to see how the visual tree in <b>myDiagram</b> changes.
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</p>
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<p>
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The <b>traverseVisualTree</b> function is what walks the visual tree of "myDiagramDiv"
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and constructs the corresponding Nodes and Links used in "myVisualTree".
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The text for each Node in "myVisualTree" is data-bound to the actual Diagram/Layer/Part/GraphObject object.
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That object is converted to a text string by using the <b>toString</b> method.
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</p>
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<p>See also the <a href="visualTreeGrouping.html">Visual Tree Using Groups</a> sample,
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to show the same visual tree using nested groups. For more uses of the <a>TreeLayout</a>,
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see the <a href="DOMTree.html">DOM Tree</a> and <a href="classHierarchy.html">Class Hierarchy Tree</a> samples.</p>
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</div>
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</body>
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</html>
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