115 lines
5.1 KiB
HTML
115 lines
5.1 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>Kitten Monitor</title>
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<meta name="description" content="A variation of a monitoring diagram where the objects of interest maintain a constant size while the user zooms in and out on the map." />
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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 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; // for conciseness in defining templates
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myDiagram =
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$(go.Diagram, "myDiagramDiv",
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{
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initialContentAlignment: go.Spot.TopLeft,
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isReadOnly: true, // allow selection but not moving or copying or deleting
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"toolManager.hoverDelay": 100, // how quickly tooltips are shown
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"toolManager.mouseWheelBehavior": go.ToolManager.WheelZoom // mouse wheel zooms instead of scrolls
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});
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// the background image, a floor plan
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myDiagram.add(
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$(go.Part, // this Part is not bound to any model data
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{ layerName: "Background", position: new go.Point(0, 0),
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selectable: false, pickable: false },
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$(go.Picture, "https://upload.wikimedia.org/wikipedia/commons/9/9a/Sample_Floorplan.jpg")
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));
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// the template for each kitten, for now just a colored circle
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myDiagram.nodeTemplate =
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$(go.Node,
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new go.Binding("location", "loc"), // specified by data
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{ locationSpot: go.Spot.Center }, // at center of node
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$(go.Shape, "Circle",
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{ width: 12, height: 12, stroke: null },
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new go.Binding("fill", "color")), // also specified by data
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{ // this tooltip shows the name and picture of the kitten
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toolTip:
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$(go.Adornment, "Auto",
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$(go.Shape, { fill: "lightyellow" }),
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$(go.Panel, "Vertical",
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$(go.Picture,
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new go.Binding("source", "src", function(s) { return "images/" + s + ".png"; })),
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$(go.TextBlock, { margin: 3 },
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new go.Binding("text", "key"))
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)
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) // end Adornment
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}
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);
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// pretend there are four kittens
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myDiagram.model.nodeDataArray = [
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{ key: "Alonzo", src: "50x40", loc: new go.Point(220, 130), color: "blue" },
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{ key: "Coricopat", src: "55x55", loc: new go.Point(420, 250), color: "green" },
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{ key: "Garfield", src: "60x90", loc: new go.Point(640, 450), color: "red" },
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{ key: "Demeter", src: "80x50", loc: new go.Point(140, 350), color: "purple" }
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];
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// This code keeps all nodes at a constant size in the viewport,
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// by adjusting for any scaling done by zooming in or out.
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// This code ignores simple Parts;
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// Links will automatically be rerouted as Nodes change size.
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var origscale = NaN;
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myDiagram.addDiagramListener("InitialLayoutCompleted", function(e) { origscale = myDiagram.scale; });
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myDiagram.addDiagramListener("ViewportBoundsChanged", function(e) {
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if (isNaN(origscale)) return;
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var newscale = myDiagram.scale;
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if (e.subject.scale === newscale) return; // optimization: don't scale Nodes when just scrolling/panning
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myDiagram.skipsUndoManager = true;
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myDiagram.startTransaction("scale Nodes");
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myDiagram.nodes.each(function(node) {
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node.scale = origscale / newscale;
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});
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myDiagram.commitTransaction("scale Nodes");
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myDiagram.skipsUndoManager = false;
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});
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// simulate some real-time position monitoring, once every 2 seconds
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function randomMovement() {
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var model = myDiagram.model;
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model.startTransaction("update locations");
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var arr = model.nodeDataArray;
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var picture = myDiagram.parts.first();
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for (var i = 0; i < arr.length; i++) {
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var data = arr[i];
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var pt = data.loc;
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var x = pt.x + 20 * Math.random() - 10;
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var y = pt.y + 20 * Math.random() - 10;
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// make sure the kittens stay inside the house
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var b = picture.actualBounds;
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if (x < b.x || x > b.right) x = pt.x;
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if (y < b.y || y > b.bottom) y = pt.y;
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model.setDataProperty(data, "loc", new go.Point(x, y));
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}
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model.commitTransaction("update locations");
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}
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function loop() {
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setTimeout(function() { randomMovement(); loop(); }, 2000);
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}
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loop(); // start the simulation
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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>The tooltip for each kitten shows its name and photo.</p>
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<p>When you zoom in or out the effective size of each Node is kept constant by changing its <a>GraphObject.scale</a>.</p>
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</div>
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</body>
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</html> |