115 lines
4.9 KiB
HTML
115 lines
4.9 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Using Dimensioning Links</title>
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<!-- Copyright 1998-2017 by Northwoods Software Corporation. -->
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<meta charset="UTF-8">
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<script src="../release/go.js"></script>
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<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
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<script src="../extensions/DimensioningLink.js"></script>
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<script id="code">
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function init() {
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if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
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var $ = go.GraphObject.make;
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myDiagram =
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$(go.Diagram, "myDiagramDiv",
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{
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initialContentAlignment: go.Spot.Center,
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"undoManager.isEnabled": true
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});
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// A simple resizable node
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myDiagram.nodeTemplate =
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$(go.Node, "Auto",
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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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{ resizable: true },
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$(go.Shape, { strokeWidth: 0, fill: "lightgray" },
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new go.Binding("fill", "color")),
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$(go.TextBlock, { margin: 10 },
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new go.Binding("text", "key"))
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);
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// A generalized example template using a DimensioningLink.
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// Most usage might not have so many Bindings.
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myDiagram.linkTemplateMap.add("Dimensioning",
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$(DimensioningLink,
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new go.Binding("fromSpot", "fromSpot", go.Spot.parse),
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new go.Binding("toSpot", "toSpot", go.Spot.parse),
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new go.Binding("direction"),
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new go.Binding("extension"),
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new go.Binding("inset"),
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$(go.Shape, { stroke: "gray" },
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new go.Binding("stroke", "color")),
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$(go.Shape, { fromArrow: "BackwardOpenTriangle", segmentIndex: 2, stroke: "gray" },
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new go.Binding("stroke", "color")),
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$(go.Shape, { toArrow: "OpenTriangle", segmentIndex: -3, stroke: "gray" },
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new go.Binding("stroke", "color")),
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$(go.TextBlock,
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{
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segmentIndex: 2,
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segmentFraction: 0.5,
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segmentOrientation: go.Link.OrientUpright,
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alignmentFocus: go.Spot.Bottom,
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stroke: "gray",
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font: "8pt sans-serif"
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},
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new go.Binding("text", "", showDistance).ofObject(),
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new go.Binding("stroke", "color"))
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));
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// Return a string representing the distance between the two points.
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// This is the cartesian distance if this.direction is NaN;
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// otherwise it is the orthogonal distance along that axis.
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function showDistance(link) {
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var numpts = link.pointsCount;
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if (numpts < 2) return "";
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var p0 = link.getPoint(0);
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var pn = link.getPoint(numpts - 1);
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var ang = link.direction;
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if (isNaN(ang)) return Math.floor(Math.sqrt(p0.distanceSquaredPoint(pn))) + "";
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var rad = ang * Math.PI / 180;
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return Math.floor(Math.abs(Math.cos(rad) * (p0.x - pn.x)) +
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Math.abs(Math.sin(rad) * (p0.y - pn.y))) + "";
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}
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myDiagram.model = new go.GraphLinksModel([
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{ key: "Alpha", loc: "0 50" },
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{ key: "Beta", loc: "150 0" },
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{ key: "Gamma", loc: "100 150"}
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], [
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{ from: "Alpha", to: "Beta", category: "Dimensioning",
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fromSpot: "TopRight", toSpot: "TopLeft" },
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{ from: "Alpha", to: "Beta", category: "Dimensioning",
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fromSpot: "TopLeft", toSpot: "TopRight", extension: 50, color: "blue" },
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{ from: "Alpha", to: "Beta", category: "Dimensioning",
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fromSpot: "TopLeft", toSpot: "TopLeft", direction: 270, color: "green" },
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{ from: "Alpha", to: "Beta", category: "Dimensioning",
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fromSpot: "BottomRight", toSpot: "BottomRight", direction: 90, color: "purple" },
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{ from: "Alpha", to: "Beta", category: "Dimensioning",
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fromSpot: "Center", toSpot: "Center", extension: 50, direction: NaN, color: "red" },
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{ from: "Gamma", to: "Gamma", category: "Dimensioning",
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fromSpot: "TopLeft", toSpot: "TopRight", direction: 0 },
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{ from: "Gamma", to: "Gamma", category: "Dimensioning",
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fromSpot: "TopRight", toSpot: "BottomRight", direction: 90 },
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{ from: "Gamma", to: "Gamma", category: "Dimensioning",
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fromSpot: "BottomRight", toSpot: "BottomLeft", direction: 180 },
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{ from: "Gamma", to: "Gamma", category: "Dimensioning",
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fromSpot: "BottomLeft", toSpot: "TopLeft", direction: 270 }
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]);
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}
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</script>
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</head>
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<body onload="init()">
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<div id="sample">
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<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:400px"></div>
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<p>
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This sample makes use of the DimensioningLink class, which inherits from the <a>Link</a> class.
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That class is defined at <a href="../extensions/DimensioningLink.js">DimensioningLink.js</a>.
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</p>
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</div>
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</body>
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</html> |