gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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HTML
<html>
<head>
<meta charset="UTF-8">
<title>Polyline Linking Tool</title>
<meta name="description" content="TypeScript: Let the user draw a new link by clicking consecutive points through which the link's route must pass." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
</head>
<body>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width: 100%; height: 600px"></div>
<div id="buttons">
<button id="SaveButton">Save</button>
<button id="LoadButton">Load</button>
</div>
<p>
This sample demonstrates the PolylineLinkingTool, which replaces the standard LinkingTool. The tool is defined in its own
file, as <a href="PolylineLinkingTool.ts">PolylineLinkingTool.ts</a>.
</p>
<p>
The user starts drawing a new link from a node in the normal manner, by dragging from a port, which for feedback purposes
has a "pointer" cursor. Normally the user would have to release the mouse near the target port/node. However with the
PolylineLinkingTool the user may click at various points to cause the new link to be routed along those points. Clicking
on the target port completes the new link. Press <b>Escape</b> to cancel, or <b>Z</b> to remove the last point.
</p>
<p>
Furthermore, because <a>Link.resegmentable</a> is true, the user can easily add or remove segments from the route of
a selected link. To insert a segment, the user can start dragging the small diamond resegmenting handle. To remove
a segment, the user needs to move a regular reshaping handle to cause the adjacent two segments to be in a straight
line.
</p>
<p>
The PolylineLinkingTool also works with orthogonally routed links. To demonstrate this, uncomment the two lines that initialize
<a>Link.routing</a> to be <a>Link.Orthogonal</a>.
</p>
<textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
"nodeDataArray": [
{ "key": 1, "text": "Node 1", "fill": "blueviolet", "loc": "100 100" },
{ "key": 2, "text": "Node 2", "fill": "orange", "loc": "400 100" }
],
"linkDataArray": [ ]
}
</textarea>
</div>
<script type="module" id="code">
import * as go from "../release/go-module.js";
import { PolylineLinkingTool } from './PolylineLinkingTool.js';
if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this
const $ = go.GraphObject.make;
const myDiagram =
$(go.Diagram, 'myDiagramDiv');
// install custom linking tool, defined in PolylineLinkingTool.js
const tool = new PolylineLinkingTool();
// tool.temporaryLink.routing = go.Link.Orthogonal; // optional, but need to keep link template in sync, below
myDiagram.toolManager.linkingTool = tool;
myDiagram.nodeTemplate =
$(go.Node, 'Spot', { locationSpot: go.Spot.Center }, new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify), $(go.Shape, {
width: 100, height: 100, fill: 'lightgray',
portId: '', cursor: 'pointer',
fromLinkable: true,
fromLinkableSelfNode: true, fromLinkableDuplicates: true,
toLinkable: true,
toLinkableSelfNode: true, toLinkableDuplicates: true // optional
}, new go.Binding('fill')), $(go.Shape, { width: 70, height: 70, fill: 'transparent', stroke: null }), $(go.TextBlock, new go.Binding('text')));
myDiagram.linkTemplate =
$(go.Link, { reshapable: true, resegmentable: true },
// { routing: go.Link.Orthogonal }, // optional, but need to keep LinkingTool.temporaryLink in sync, above
{ adjusting: go.Link.Stretch }, // optional
new go.Binding('points', 'points').makeTwoWay(), $(go.Shape, { strokeWidth: 1.5 }), $(go.Shape, { toArrow: 'OpenTriangle' }));
load(); // load a simple diagram from the textarea
// save a model to and load a model from Json text, displayed below the Diagram
export function save() {
const str = myDiagram.model.toJson();
document.getElementById('mySavedModel').value = str;
}
export function load() {
const str = document.getElementById('mySavedModel').value;
myDiagram.model = go.Model.fromJson(str);
myDiagram.model.undoManager.isEnabled = true;
}
document.getElementById("SaveButton").onclick = save;
document.getElementById("LoadButton").onclick = load;
window.myDiagram = myDiagram; // Attach to the window for console debugging
</script>
</body>
</html>