195 lines
7.4 KiB
HTML
195 lines
7.4 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 Tree View</title>
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<meta name="description" content="A traditional tree view using TreeLayout with tri-state checkboxes showing partially checked subtrees." />
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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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// This button assumes data binding to the "checked" property.
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go.GraphObject.defineBuilder("TriStateCheckBoxButton", function (args) {
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var button = /** @type {Panel} */ (
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go.GraphObject.make("Button",
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{
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"ButtonBorder.fill": "white",
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"ButtonBorder.stroke": "gray",
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width: 14,
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height: 14
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},
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go.GraphObject.make(go.Shape,
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{
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name: "ButtonIcon",
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geometryString: "M0 4 L3 9 9 0", // a "check" mark
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strokeWidth: 2,
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stretch: go.GraphObject.Fill, // this Shape expands to fill the Button
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geometryStretch: go.GraphObject.Uniform, // the check mark fills the Shape without distortion
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background: null,
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visible: false // visible set to false: not checked, unless data.checked is true
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},
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new go.Binding("visible", "checked", function (p) { return p === true || p === null; }),
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new go.Binding("stroke", "checked", function (p) { return p === null ? null : "black"; }),
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new go.Binding("background", "checked", function (p) { return p === null ? "gray" : null; })
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)
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)
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);
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function updateCheckBoxesDown(node, val) {
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node.diagram.model.setDataProperty(node.data, "checked", val);
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node.findTreeChildrenNodes().each(function (child) { updateCheckBoxesDown(child, val); })
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}
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function updateCheckBoxesUp(node) {
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var parent = node.findTreeParentNode();
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if (parent !== null) {
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var anychecked = parent.findTreeChildrenNodes().any(function (n) { return n.data.checked !== false && n.data.checked !== undefined; });
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var allchecked = parent.findTreeChildrenNodes().all(function (n) { return n.data.checked === true; });
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node.diagram.model.setDataProperty(parent.data, "checked", (allchecked ? true : (anychecked ? null : false)));
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updateCheckBoxesUp(parent);
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}
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}
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button.click = function (e, button) {
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if (!button.isEnabledObject()) return;
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var diagram = e.diagram;
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if (diagram === null || diagram.isReadOnly) return;
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if (diagram.model.isReadOnly) return;
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e.handled = true;
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var shape = button.findObject("ButtonIcon");
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diagram.startTransaction("checkbox");
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// Assume the name of the data property is "checked".
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var node = button.part;
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var oldval = node.data.checked;
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var newval = (oldval !== true); // newval will always be either true or false, never null
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// Set this data.checked property and those of all its children to the same value
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updateCheckBoxesDown(node, newval);
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// Walk up the tree and update all of their checkboxes
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updateCheckBoxesUp(node);
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// support extra side-effects without clobbering the click event handler:
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if (typeof button["_doClick"] === "function") button["_doClick"](e, button);
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diagram.commitTransaction("checkbox");
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};
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return button;
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});
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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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$(go.Diagram, "myDiagramDiv",
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{
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allowMove: false,
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allowCopy: false,
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allowDelete: false,
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allowHorizontalScroll: false,
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layout:
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$(go.TreeLayout,
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{
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alignment: go.TreeLayout.AlignmentStart,
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angle: 0,
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compaction: go.TreeLayout.CompactionNone,
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layerSpacing: 16,
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layerSpacingParentOverlap: 1,
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nodeIndent: 2,
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nodeIndentPastParent: 0.88,
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nodeSpacing: 0,
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setsPortSpot: false,
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setsChildPortSpot: false
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})
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});
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myDiagram.nodeTemplate =
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$(go.Node,
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{ // no Adornment: instead change panel background color by binding to Node.isSelected
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selectionAdorned: false,
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// a custom function to allow expanding/collapsing on double-click
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// this uses similar logic to a TreeExpanderButton
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doubleClick: function(e, node) {
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var cmd = myDiagram.commandHandler;
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if (node.isTreeExpanded) {
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if (!cmd.canCollapseTree(node)) return;
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} else {
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if (!cmd.canExpandTree(node)) return;
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}
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e.handled = true;
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if (node.isTreeExpanded) {
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cmd.collapseTree(node);
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} else {
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cmd.expandTree(node);
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}
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}
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},
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$("TreeExpanderButton",
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{
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width: 14,
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"ButtonBorder.fill": "whitesmoke",
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"ButtonBorder.stroke": "lightgray",
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"_buttonFillOver": "rgba(0,128,255,0.25)",
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"_buttonStrokeOver": null
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}),
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$(go.Panel, "Horizontal",
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{ position: new go.Point(16, 0), margin: new go.Margin(0, 2, 0, 0), defaultAlignment: go.Spot.Center },
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new go.Binding("background", "isSelected", function(s) { return (s ? "lightblue" : "white"); }).ofObject(),
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$("TriStateCheckBoxButton"),
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$(go.TextBlock,
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{ font: '9pt Verdana, sans-serif', margin: new go.Margin(0, 0, 0, 2) },
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new go.Binding("text", "key", function(s) { return "item " + s; }))
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) // end Horizontal Panel
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); // end Node
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// without lines
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//myDiagram.linkTemplate = $(go.Link);
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// with lines
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myDiagram.linkTemplate =
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$(go.Link,
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{ selectable: false,
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routing: go.Link.Orthogonal,
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fromEndSegmentLength: 4,
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toEndSegmentLength: 4,
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fromSpot: new go.Spot(0.001, 1, 7, 0),
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toSpot: go.Spot.Left },
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$(go.Shape,
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{ stroke: 'gray', strokeDashArray: [1,2] }));
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// create a random tree
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var nodeDataArray = [{ key: 0 }];
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var max = 25;
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var count = 0;
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while (count < max) {
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count = makeTree(3, count, max, nodeDataArray, nodeDataArray[0]);
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}
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myDiagram.model = new go.TreeModel(nodeDataArray);
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}
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function makeTree(level, count, max, nodeDataArray, parentdata) {
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var numchildren = Math.floor(Math.random() * 10);
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for (var i = 0; i < numchildren; i++) {
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if (count >= max) return count;
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count++;
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var childdata = { key: count, parent: parentdata.key };
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nodeDataArray.push(childdata);
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if (level > 0 && Math.random() > 0.5) {
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count = makeTree(level - 1, count, max, nodeDataArray, childdata);
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}
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}
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return count;
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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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<div id="myDiagramDiv" style="border: 1px solid black; width: 300px; height: 400px"></div>
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<p>
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This sample is derived from the <a href="treeView.html" target="_blank">Tree View</a> sample.
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It adds the definition of the "TriStateCheckBoxButton" which is defined only to be used in a tree.
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</p>
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</div>
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</body>
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</html>
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