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147 lines
6.0 KiB
HTML
Executable File
147 lines
6.0 KiB
HTML
Executable File
<!DOCTYPE html>
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<html>
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<head>
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<title>Overview Resizing</title>
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<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
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<meta name="description" content="TypeScript: The OverviewResizingTool extension allows the user to change the viewport of the observed Diagram by resizing the box representing the viewport in an Overview." />
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
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</head>
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<body>
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<div id="sample">
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<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
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<div id="myOverviewDiv" style="border: solid 1px black; width: 250px; height: 200px"></div>
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<p><button id="zoomToFit">Zoom to Fit</button><button id="expandAtRandom">Expand random Node</button></p>
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<p>
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This sample demonstrates a custom <a>ResizingTool</a> which allows the user to resize the overview box.
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It is defined in its own file, as <a href="OverviewResizingTool.ts">OverviewResizingTool.ts</a>.
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</p>
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</div>
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<script type="module" id="code">
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import * as go from "../release/go-module.js";
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import { OverviewResizingTool } from './OverviewResizingTool.js';
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if (window.goSamples) window.goSamples(); // init for these samples -- you don't need to call this
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const $ = go.GraphObject.make; // for conciseness in defining templates
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const myDiagram = $(go.Diagram, 'myDiagramDiv', // create a Diagram for the DIV HTML element
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{
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layout: $(go.ForceDirectedLayout),
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'undoManager.isEnabled': true // enable undo & redo
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});
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// Define the Node template.
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// This uses a Spot Panel to position a button relative
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// to the ellipse surrounding the text.
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myDiagram.nodeTemplate =
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$(go.Node, 'Spot', {
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selectionObjectName: 'PANEL',
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isTreeExpanded: false,
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isTreeLeaf: false
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},
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// the node's outer shape, which will surround the text
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$(go.Panel, 'Auto', { name: 'PANEL' }, $(go.Shape, 'Circle', { fill: '#03A9F4', stroke: 'black' }), $(go.TextBlock, { font: '12pt sans-serif', margin: 5 }, new go.Binding('text', 'key'))),
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// the expand/collapse button, at the top-right corner
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$('TreeExpanderButton', {
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name: 'TREEBUTTON',
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width: 20, height: 20,
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alignment: go.Spot.TopRight,
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alignmentFocus: go.Spot.Center,
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// customize the expander behavior to
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// create children if the node has never been expanded
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click: function (e, obj) {
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const node = obj.part; // get the Node containing this Button
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if (node === null)
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return;
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e.handled = true;
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expandNode(node);
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}
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}) // end TreeExpanderButton
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); // end Node
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// create the model with a root node data
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myDiagram.model = new go.TreeModel([
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{ key: 0, everExpanded: false }
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]);
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// Overview
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const myOverview = $(go.Overview, 'myOverviewDiv', // the HTML DIV element for the Overview
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{
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observed: myDiagram,
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contentAlignment: go.Spot.Center,
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'box.resizable': true,
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'resizingTool': new OverviewResizingTool()
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});
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document.getElementById('zoomToFit').addEventListener('click', function () {
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myDiagram.zoomToFit();
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});
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document.getElementById('expandAtRandom').addEventListener('click', function () {
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expandAtRandom();
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});
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function expandNode(node) {
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const diagram = node.diagram;
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if (diagram === null)
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return;
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diagram.startTransaction('CollapseExpandTree');
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// this behavior is specific to this incrementalTree sample:
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const data = node.data;
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if (!data.everExpanded) {
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// only create children once per node
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diagram.model.setDataProperty(data, 'everExpanded', true);
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const numchildren = createSubTree(data);
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if (numchildren === 0) { // now known no children: don't need Button!
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const btn = node.findObject('TREEBUTTON');
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if (btn !== null)
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btn.visible = false;
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}
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}
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// this behavior is generic for most expand/collapse tree buttons:
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if (node.isTreeExpanded) {
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diagram.commandHandler.collapseTree(node);
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}
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else {
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diagram.commandHandler.expandTree(node);
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}
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diagram.commitTransaction('CollapseExpandTree');
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}
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// This dynamically creates the immediate children for a node.
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// The sample assumes that we have no idea of whether there are any children
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// for a node until we look for them the first time, which happens
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// upon the first tree-expand of a node.
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function createSubTree(parentdata) {
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let numchildren = Math.floor(Math.random() * 10);
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if (myDiagram.nodes.count <= 1) {
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numchildren += 1; // make sure the root node has at least one child
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}
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// create several node data objects and add them to the model
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const model = myDiagram.model;
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const parent = myDiagram.findNodeForData(parentdata);
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if (parent === null)
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return;
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for (let i = 0; i < numchildren; i++) {
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const childdata = {
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key: model.nodeDataArray.length,
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parent: parentdata.key
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};
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// add to model.nodeDataArray and create a Node
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model.addNodeData(childdata);
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// position the new child node close to the parent
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const child = myDiagram.findNodeForData(childdata);
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if (child !== null)
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child.location = parent.location;
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}
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return numchildren;
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}
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function expandAtRandom() {
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const eligibleNodes = [];
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myDiagram.nodes.each(function (n) {
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if (!n.isTreeExpanded)
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eligibleNodes.push(n);
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});
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const node = eligibleNodes[Math.floor(Math.random() * (eligibleNodes.length))];
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expandNode(node);
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}
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window.myDiagram = myDiagram; // Attach to the window for console debugging
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</script>
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</body>
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</html> |