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241 lines
11 KiB
HTML
Executable File
241 lines
11 KiB
HTML
Executable File
<!DOCTYPE html>
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<html>
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<head>
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<title>Snap Link Reshaping</title>
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<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
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<meta name="description" content="TypeScript: When reshaping an orthogonal link, make sure the points are moved onto a grid." />
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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 style="width: 100%; display: flex; justify-content: space-between">
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<div id="myPaletteDiv" style="width: 105px; height: 620px; margin-right: 2px; background-color: whitesmoke; border: solid 1px black"></div>
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<div id="myDiagramDiv" style="flex-grow: 1; height: 620px; border: solid 1px black"></div>
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</div>
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<label><input type="checkbox" id="AvoidsNodesCheckBox" checked="checked"/>avoidsNodes</label>
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<p>
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This sample is a simplified version of the <a href="../samples/draggableLink.html">Draggable Link</a> sample.
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Links are not draggable, there are no custom <a>Adornment</a>s, nodes are not rotatable, and links
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do not have text labels.
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</p>
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<p>
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Its purpose is to demonstrate the <a href="SnapLinkReshapingTool.ts">SnapLinkReshapingTool</a>,
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an extension of <a>LinkReshapingTool</a> that snaps each dragged reshape handle of selected Links to
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the nearest grid point. If the <a>SnapLinkReshapingTool.avoidsNodes</a> option is true,
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as it is by default, then the reshaping is limited to points where the adjacent segments would not
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be crossing over any avoidable nodes.
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</p>
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<p>
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Note how the "LinkReshaped" DiagramEvent listener changes the <a>Link.routing</a> of the reshaped Link,
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so that it is no longer AvoidsNodes routing but simple Orthogonal routing.
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This combined with <a>Link.adjusting</a> being End permits the middle points of the link route to be
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retained even after the user moves or resizes nodes.
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Furthermore there is a TwoWay <a>Binding</a> on <a>Link.routing</a>, so that the model remembers
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whether the link route had ever been reshaped manually.
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</p>
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<button id="SaveButton">Save</button>
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<button id="LoadButton">Load</button>
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<textarea id="mySavedModel" style="width:100%;height:300px">
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{ "class": "go.GraphLinksModel",
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"linkFromPortIdProperty": "fromPort",
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"linkToPortIdProperty": "toPort",
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"modelData": {"position":"0 0"},
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"nodeDataArray": [
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-3, "loc":"184 176"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-2, "loc":"248 248"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-4, "loc":"424 192"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-5, "loc":"320 152"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-6, "loc":"424 320"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-7, "loc":"352 256"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-8, "loc":"176 296"},
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{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-9, "loc":"288 344"},
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{"text":"Step", "key":-10, "loc":"96 240"},
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{"text":"Step", "key":-11, "loc":"536 280"}
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],
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"linkDataArray": [
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{"from":-10, "to":-11, "fromPort":"R", "toPort":"L", "points":[121,240,131,240,132,240,132,240,216,240,216,176,264,176,264,104,392,104,392,240,480,240,480,280,501,280,511,280], "routing":"Orthogonal"}
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]}
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</textarea>
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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 './Figures.js';
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import { SnapLinkReshapingTool } from './SnapLinkReshapingTool.js';
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if (window.goSamples) goSamples(); // init for the 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 =
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$(go.Diagram, 'myDiagramDiv', // must name or refer to the DIV HTML element
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{
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// supply a simple narrow grid that manually reshaped link routes will follow
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grid: $(go.Panel, 'Grid', { gridCellSize: new go.Size(8, 8) }, $(go.Shape, 'LineH', { stroke: 'lightgray', strokeWidth: 0.5 }), $(go.Shape, 'LineV', { stroke: 'lightgray', strokeWidth: 0.5 })),
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'draggingTool.isGridSnapEnabled': true,
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linkReshapingTool: $(SnapLinkReshapingTool),
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// when the user reshapes a Link, change its Link.routing from AvoidsNodes to Orthogonal,
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// so that combined with Link.adjusting == End the link will retain its reshaped mid points
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// even after nodes are moved
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'LinkReshaped': (e) => { e.subject.routing = go.Link.Orthogonal; },
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'animationManager.isEnabled': false,
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'undoManager.isEnabled': true
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});
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// when the document is modified, add a "*" to the title and enable the "Save" button
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myDiagram.addDiagramListener('Modified', (e) => {
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const button = document.getElementById('SaveButton');
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if (button)
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button.disabled = !myDiagram.isModified;
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const idx = document.title.indexOf('*');
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if (myDiagram.isModified) {
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if (idx < 0)
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document.title += '*';
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}
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else {
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if (idx >= 0)
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document.title = document.title.substr(0, idx);
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}
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});
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// Define a function for creating a "port" that is normally transparent.
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// The "name" is used as the GraphObject.portId, the "spot" is used to control how links connect
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// and where the port is positioned on the node, and the boolean "output" and "input" arguments
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// control whether the user can draw links from or to the port.
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function makePort(name, spot, output, input) {
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// the port is basically just a small transparent square
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return $(go.Shape, 'Circle', {
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fill: null,
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stroke: null,
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desiredSize: new go.Size(7, 7),
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alignment: spot,
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alignmentFocus: spot,
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portId: name,
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fromSpot: spot, toSpot: spot,
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fromLinkable: output, toLinkable: input,
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cursor: 'pointer' // show a different cursor to indicate potential link point
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});
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}
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myDiagram.nodeTemplate =
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$(go.Node, 'Spot',
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{ locationSpot: go.Spot.Center },
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new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify),
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{ selectable: true },
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{ resizable: true, resizeObjectName: 'PANEL' },
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// the main object is a Panel that surrounds a TextBlock with a Shape
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$(go.Panel, 'Auto',
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{ name: 'PANEL' },
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new go.Binding('desiredSize', 'size', go.Size.parse).makeTwoWay(go.Size.stringify),
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$(go.Shape, 'Rectangle', // default figure
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{
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portId: '',
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fromLinkable: true, toLinkable: true, cursor: 'pointer',
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fill: 'white' // default color
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},
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new go.Binding('figure'),
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new go.Binding('fill')),
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$(go.TextBlock,
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{
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font: 'bold 11pt Helvetica, Arial, sans-serif',
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margin: 8,
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maxSize: new go.Size(160, NaN),
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wrap: go.TextBlock.WrapFit,
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editable: true
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},
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new go.Binding('text').makeTwoWay())
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),
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// four small named ports, one on each side:
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makePort('T', go.Spot.Top, false, true),
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makePort('L', go.Spot.Left, true, true),
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makePort('R', go.Spot.Right, true, true),
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makePort('B', go.Spot.Bottom, true, false),
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{
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mouseEnter: (e, node) => {
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if (node instanceof go.Node)
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showSmallPorts(node, true);
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},
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mouseLeave: (e, node) => {
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if (node instanceof go.Node)
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showSmallPorts(node, false);
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}
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});
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function showSmallPorts(node, show) {
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node.ports.each((port) => {
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if (port.portId !== '') { // don't change the default port, which is the big shape
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port.fill = show ? 'rgba(0,0,0,.3)' : null;
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}
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});
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}
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myDiagram.linkTemplate =
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$(go.Link, // the whole link panel
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{ relinkableFrom: true, relinkableTo: true, reshapable: true, resegmentable: true },
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{
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routing: go.Link.AvoidsNodes,
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adjusting: go.Link.End,
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curve: go.Link.JumpOver,
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corner: 5,
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toShortLength: 4
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},
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new go.Binding('points').makeTwoWay(),
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// remember the Link.routing too
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new go.Binding('routing', 'routing', go.Binding.parseEnum(go.Link, go.Link.AvoidsNodes))
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.makeTwoWay(go.Binding.toString),
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$(go.Shape, // the link path shape
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{ isPanelMain: true, strokeWidth: 2 }),
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$(go.Shape, // the arrowhead
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{ toArrow: 'Standard', stroke: null }));
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load(); // load an initial diagram from some JSON text
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const link = myDiagram.links.first();
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if (link) link.isSelected = true;
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// initialize the Palette that is on the left side of the page
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const myPalette =
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$(go.Palette, 'myPaletteDiv', // must name or refer to the DIV HTML element
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{
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maxSelectionCount: 1,
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nodeTemplateMap: myDiagram.nodeTemplateMap,
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model: new go.GraphLinksModel([
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{ text: 'Start', figure: 'Circle', fill: 'green' },
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{ text: 'Step' },
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{ text: 'DB', figure: 'Database', fill: 'lightgray' },
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{ text: '???', figure: 'Diamond', fill: 'lightskyblue' },
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{ text: 'End', figure: 'Circle', fill: 'red' },
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{ text: 'Comment', figure: 'RoundedRectangle', fill: 'lightyellow' }
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])
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});
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// Show the diagram's model in JSON format that the user may edit
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function save() {
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saveDiagramProperties(); // do this first, before writing to JSON
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document.getElementById('mySavedModel').value = myDiagram.model.toJson();
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myDiagram.isModified = false;
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}
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function load() {
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myDiagram.model = go.Model.fromJson(document.getElementById('mySavedModel').value);
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loadDiagramProperties();
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}
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function saveDiagramProperties() {
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myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);
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}
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// Called by "InitialLayoutCompleted" DiagramEvent listener, NOT directly by load()!
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function loadDiagramProperties() {
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// set Diagram.initialPosition, not Diagram.position, to handle initialization side-effects
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const pos = myDiagram.model.modelData.position;
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if (pos) myDiagram.initialPosition = go.Point.parse(pos);
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}
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document.getElementById("SaveButton").onclick = save;
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document.getElementById("LoadButton").onclick = load;
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document.getElementById("AvoidsNodesCheckBox").onclick = function(e) {
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myDiagram.toolManager.linkReshapingTool.avoidsNodes = e.target.checked;
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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> |