gojs
Version:
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>Using Dimensioning Links</title>
<meta name="description" content="TypeScript: Dimensioning Links show the distance from a spot on a node to another spot on a node." />
<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:400px"></div>
<p>
This sample makes use of the DimensioningLink class, which inherits from the <a>Link</a> class. That class is defined
at <a href="../extensions/DimensioningLink.ts">DimensioningLink.ts</a>.
</p>
</div>
<script type="module" id="code">
import * as go from "../release/go-module.js";
import { DimensioningLink } from './DimensioningLink.js';
if (window.goSamples) window.goSamples(); // init for these samples -- you don't need to call this
const $ = go.GraphObject.make;
const myDiagram = $(go.Diagram, 'myDiagramDiv', {
'undoManager.isEnabled': true
});
// A simple resizable node
myDiagram.nodeTemplate =
$(go.Node, 'Auto', { locationSpot: go.Spot.Center }, new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify), { resizable: true }, $(go.Shape, { strokeWidth: 0, fill: 'lightgray' }, new go.Binding('fill', 'color')), $(go.TextBlock, { margin: 10 }, new go.Binding('text', 'key')));
// A generalized example template using a DimensioningLink.
// Most usage might not have so many Bindings.
myDiagram.linkTemplateMap.add('Dimensioning', $(DimensioningLink, new go.Binding('fromSpot', 'fromSpot', go.Spot.parse), new go.Binding('toSpot', 'toSpot', go.Spot.parse), new go.Binding('direction'), new go.Binding('extension'), new go.Binding('inset'), $(go.Shape, { stroke: 'gray' }, new go.Binding('stroke', 'color')), $(go.Shape, { fromArrow: 'BackwardOpenTriangle', segmentIndex: 2, stroke: 'gray' }, new go.Binding('stroke', 'color')), $(go.Shape, { toArrow: 'OpenTriangle', segmentIndex: -3, stroke: 'gray' }, new go.Binding('stroke', 'color')), $(go.TextBlock, {
segmentIndex: 2,
segmentFraction: 0.5,
segmentOrientation: go.Link.OrientUpright,
alignmentFocus: go.Spot.Bottom,
stroke: 'gray',
font: '8pt sans-serif'
}, new go.Binding('text', '', showDistance).ofObject(), new go.Binding('stroke', 'color'))));
// Return a string representing the distance between the two points.
// This is the cartesian distance if this.direction is NaN;
// otherwise it is the orthogonal distance along that axis.
function showDistance(link) {
const numpts = link.pointsCount;
if (numpts < 2)
return '';
const p0 = link.getPoint(0);
const pn = link.getPoint(numpts - 1);
const ang = link.direction;
if (isNaN(ang))
return Math.floor(Math.sqrt(p0.distanceSquaredPoint(pn))) + '';
const rad = ang * Math.PI / 180;
return Math.floor(Math.abs(Math.cos(rad) * (p0.x - pn.x)) +
Math.abs(Math.sin(rad) * (p0.y - pn.y))) + '';
}
myDiagram.model = new go.GraphLinksModel([
{ key: 'Alpha', loc: '0 50' },
{ key: 'Beta', loc: '150 0' },
{ key: 'Gamma', loc: '100 150' }
], [
{
from: 'Alpha', to: 'Beta', category: 'Dimensioning',
fromSpot: 'TopRight', toSpot: 'TopLeft'
},
{
from: 'Alpha', to: 'Beta', category: 'Dimensioning',
fromSpot: 'TopLeft', toSpot: 'TopRight', extension: 50, color: 'blue'
},
{
from: 'Alpha', to: 'Beta', category: 'Dimensioning',
fromSpot: 'TopLeft', toSpot: 'TopLeft', direction: 270, color: 'green'
},
{
from: 'Alpha', to: 'Beta', category: 'Dimensioning',
fromSpot: 'BottomRight', toSpot: 'BottomRight', direction: 90, color: 'purple'
},
{
from: 'Alpha', to: 'Beta', category: 'Dimensioning',
fromSpot: 'Center', toSpot: 'Center', extension: 50, direction: NaN, color: 'red'
},
{
from: 'Gamma', to: 'Gamma', category: 'Dimensioning',
fromSpot: 'TopLeft', toSpot: 'TopRight', direction: 0
},
{
from: 'Gamma', to: 'Gamma', category: 'Dimensioning',
fromSpot: 'TopRight', toSpot: 'BottomRight', direction: 90
},
{
from: 'Gamma', to: 'Gamma', category: 'Dimensioning',
fromSpot: 'BottomRight', toSpot: 'BottomLeft', direction: 180
},
{
from: 'Gamma', to: 'Gamma', category: 'Dimensioning',
fromSpot: 'BottomLeft', toSpot: 'TopLeft', direction: 270
}
]);
window.myDiagram = myDiagram; // Attach to the window for console debugging
</script>
</body>
</html>