96 lines
4.0 KiB
HTML
96 lines
4.0 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>Tool for Reshaping a Sector of a Circle</title>
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<meta name="description" content="A demonstration of the SectorReshapingTool extension." />
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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="SectorReshapingTool.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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"animationManager.isEnabled": false,
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"undoManager.isEnabled": true
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});
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// install the SectorReshapingTool as a mouse-down tool
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myDiagram.toolManager.mouseDownTools.add(new SectorReshapingTool());
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function makeSector(data) { // Geometry converter for the node's "LAMP" Shape
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var radius = SectorReshapingTool.getRadius(data);
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var angle = SectorReshapingTool.getAngle(data);
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var sweep = SectorReshapingTool.getSweep(data);
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var start = new go.Point(radius, 0).rotate(angle);
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// this is much more efficient than calling go.GraphObject.make:
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var geo = new go.Geometry()
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.add(new go.PathFigure(radius + start.x, radius + start.y) // start point
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.add(new go.PathSegment(go.PathSegment.Arc,
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angle, sweep, // angles
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radius, radius, // center
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radius, radius)) // radius
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.add(new go.PathSegment(go.PathSegment.Line, radius, radius).close()))
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.add(new go.PathFigure(0, 0)) // make sure the Geometry always includes the whole circle
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.add(new go.PathFigure(2 * radius, 2 * radius)); // even if only a small sector is "lit"
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console.log(geo.toString());
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return geo;
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}
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myDiagram.nodeTemplate =
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$(go.Node, "Spot",
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{
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locationSpot: go.Spot.Center, locationObjectName: "LAMP",
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selectionObjectName: "LAMP", selectionAdorned: false
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},
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new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
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// selecting a Node brings it forward in the z-order
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new go.Binding("layerName", "isSelected", function(s) { return s ? "Foreground" : ""; }).ofObject(),
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$(go.Panel, "Spot",
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{ name: "LAMP" },
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$(go.Shape, // arc
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{ fill: "yellow", stroke: "lightgray", strokeWidth: 0.5 },
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new go.Binding("geometry", "", makeSector)),
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$(go.Shape, "Circle",
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{ name: "SHAPE", width: 6, height: 6 })
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),
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$(go.TextBlock,
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{
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alignment: new go.Spot(0.5, 0.5, 0, 3), alignmentFocus: go.Spot.Top,
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stroke: "blue", background: "rgba(255,255,255,0.3)"
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},
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new go.Binding("alignment", "spot", go.Spot.parse).makeTwoWay(go.Spot.stringify),
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new go.Binding("text", "name"))
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);
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myDiagram.model = new go.GraphLinksModel([
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{ name: "Alpha", radius: 70, sweep: 120 },
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{ name: "Beta", radius: 70, sweep: 80, angle: 200 }
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]);
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myDiagram.commandHandler.selectAll(); // to show the tool handles
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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:600px"></div>
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<p>
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Two of the handles permit changing the angles of the sector; one handle permits changing the radius of the sector.
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</p>
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<p>
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Note that the <a>Geometry</a> returned by <code>makeSector</code> always returns a Geometry that
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occupies the area that would be occupied by a full circle. That Geometry-creating function also
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depends on three data properties, <code>radius</code>, <code>angle</code>, and <code>sweep</code>.
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</p>
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</div>
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</body>
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</html> |