markgojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
115 lines (109 loc) • 5.04 kB
HTML
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Using Dimensioning Links</title>
<!-- Copyright 1998-2019 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="../release/go.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<script src="../extensions/DimensioningLink.js"></script>
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
var $ = go.GraphObject.make;
myDiagram =
$(go.Diagram, "myDiagramDiv",
{
initialContentAlignment: go.Spot.Center,
"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) {
var numpts = link.pointsCount;
if (numpts < 2) return "";
var p0 = link.getPoint(0);
var pn = link.getPoint(numpts - 1);
var ang = link.direction;
if (isNaN(ang)) return Math.floor(Math.sqrt(p0.distanceSquaredPoint(pn))) + "";
var 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 }
]);
}
</script>
</head>
<body onload="init()">
<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.js">DimensioningLink.js</a>.
</p>
</div>
</body>
</html>