212 lines
8.7 KiB
HTML
212 lines
8.7 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>State Chart with Simple Curved Link Reshaping</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="CurvedLinkReshapingTool.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; // for conciseness in defining templates
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myDiagram =
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$(go.Diagram, "myDiagramDiv", // must name or refer to the DIV HTML element
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{
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// start everything in the middle of the viewport
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initialContentAlignment: go.Spot.Center,
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// have mouse wheel events zoom in and out instead of scroll up and down
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"toolManager.mouseWheelBehavior": go.ToolManager.WheelZoom,
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// support double-click in background creating a new node
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"clickCreatingTool.archetypeNodeData": { text: "new node" },
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"linkReshapingTool": new CurvedLinkReshapingTool(),
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// enable undo & redo
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"undoManager.isEnabled": true
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});
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// when the document is modified, add a "*" to the title and enable the "Save" button
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myDiagram.addDiagramListener("Modified", function(e) {
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var button = document.getElementById("SaveButton");
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if (button) button.disabled = !myDiagram.isModified;
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var idx = document.title.indexOf("*");
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if (myDiagram.isModified) {
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if (idx < 0) document.title += "*";
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} else {
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if (idx >= 0) document.title = document.title.substr(0, idx);
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}
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});
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// define the Node template
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myDiagram.nodeTemplate =
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$(go.Node, "Auto",
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new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
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// define the node's outer shape, which will surround the TextBlock
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$(go.Shape, "RoundedRectangle",
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{
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parameter1: 20, // the corner has a large radius
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fill: $(go.Brush, "Linear", { 0: "rgb(254, 201, 0)", 1: "rgb(254, 162, 0)" }),
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stroke: "black",
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portId: "",
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fromLinkable: true,
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fromLinkableSelfNode: true,
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fromLinkableDuplicates: true,
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toLinkable: true,
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toLinkableSelfNode: true,
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toLinkableDuplicates: true,
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cursor: "pointer"
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}),
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$(go.TextBlock,
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{
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font: "bold 11pt helvetica, bold arial, sans-serif",
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editable: true // editing the text automatically updates the model data
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},
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new go.Binding("text", "text").makeTwoWay())
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);
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// unlike the normal selection Adornment, this one includes a Button
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myDiagram.nodeTemplate.selectionAdornmentTemplate =
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$(go.Adornment, "Spot",
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$(go.Panel, "Auto",
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$(go.Shape, { fill: null, stroke: "blue", strokeWidth: 2 }),
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$(go.Placeholder) // this represents the selected Node
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),
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// the button to create a "next" node, at the top-right corner
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$("Button",
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{
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alignment: go.Spot.TopRight,
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click: addNodeAndLink // this function is defined below
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},
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$(go.Shape, "PlusLine", { desiredSize: new go.Size(6, 6) })
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) // end button
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); // end Adornment
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// clicking the button inserts a new node to the right of the selected node,
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// and adds a link to that new node
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function addNodeAndLink(e, obj) {
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var adorn = obj.part;
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e.handled = true;
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var diagram = adorn.diagram;
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diagram.startTransaction("Add State");
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// get the node data for which the user clicked the button
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var fromNode = adorn.adornedPart;
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var fromData = fromNode.data;
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// create a new "State" data object, positioned off to the right of the adorned Node
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var toData = { text: "new" };
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var p = fromNode.location.copy();
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p.x += 200;
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toData.loc = go.Point.stringify(p); // the "loc" property is a string, not a Point object
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// add the new node data to the model
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var model = diagram.model;
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model.addNodeData(toData);
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// create a link data from the old node data to the new node data
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var linkdata = {
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from: model.getKeyForNodeData(fromData), // or just: fromData.id
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to: model.getKeyForNodeData(toData),
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text: "transition"
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};
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// and add the link data to the model
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model.addLinkData(linkdata);
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// select the new Node
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var newnode = diagram.findNodeForData(toData);
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diagram.select(newnode);
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diagram.commitTransaction("Add State");
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// if the new node is off-screen, scroll the diagram to show the new node
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diagram.scrollToRect(newnode.actualBounds);
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}
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// replace the default Link template in the linkTemplateMap
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myDiagram.linkTemplate =
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$(go.Link, // the whole link panel
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{ curve: go.Link.Bezier, reshapable: true },
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// don't need to save Link.points, so don't need TwoWay Binding on "points"
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new go.Binding("curviness", "curviness").makeTwoWay(), // but save "curviness" automatically
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$(go.Shape, // the link shape
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{ strokeWidth: 1.5 }),
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$(go.Shape, // the arrowhead
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{ toArrow: "standard", stroke: null }),
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$(go.Panel, "Auto",
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$(go.Shape, // the label background, which becomes transparent around the edges
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{
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fill: $(go.Brush, "Radial",
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{ 0: "rgb(240, 240, 240)", 0.3: "rgb(240, 240, 240)", 1: "rgba(240, 240, 240, 0)" }),
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stroke: null
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}),
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$(go.TextBlock, "transition", // the label text
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{
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textAlign: "center",
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font: "10pt helvetica, arial, sans-serif",
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stroke: "black",
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margin: 4,
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editable: true // editing the text automatically updates the model data
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},
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new go.Binding("text", "text").makeTwoWay())
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)
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);
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// read in the JSON-format data from the "mySavedModel" element
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load();
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}
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// Show the diagram's model in JSON format
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function save() {
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document.getElementById("mySavedModel").value = myDiagram.model.toJson();
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myDiagram.isModified = false;
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}
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function load() {
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myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
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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="background-color: whitesmoke; border: solid 1px black; width: 100%; height: 400px"></div>
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<p>
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This sample is a modification of the <a href="../samples/stateChart.html">State Chart</a> sample
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that makes use of the CurvedLinkReshapingTool that is defined in its own file, as <a href="CurvedLinkReshapingTool.js">CurvedLinkReshapingTool.js</a>.
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</p>
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<p>
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Note that unlike the standard case of a Bezier-curved Link that is <a>Part.reshapable</a>, there is only one reshape handle
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When the user drags that handle, the value of <a>Link.curviness</a> is modified, causing the link to be curved differently.
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This sample also defines a TwoWay <a>Binding</a> on that property, thereby saving the curviness to the model data.
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Unlike the regular State Chart sample, there is no Binding on <a>Link.points</a>, which is no longer needed when the curviness is the only modified property.
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</p>
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<button id="SaveButton" onclick="save()">Save</button>
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<button onclick="load()">Load</button>
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Diagram Model saved in JSON format:
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<br />
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<textarea id="mySavedModel" style="width:100%;height:300px">
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{ "nodeKeyProperty": "id",
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"nodeDataArray": [
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{ "id": 0, "loc": "120 120", "text": "Initial" },
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{ "id": 1, "loc": "330 120", "text": "First down" },
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{ "id": 2, "loc": "226 376", "text": "First up" },
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{ "id": 3, "loc": "60 276", "text": "Second down" },
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{ "id": 4, "loc": "226 226", "text": "Wait" }
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],
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"linkDataArray": [
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{ "from": 0, "to": 0, "text": "up or timer", "curviness": -20 },
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{ "from": 0, "to": 1, "text": "down", "curviness": 20 },
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{ "from": 1, "to": 0, "text": "up (moved)\nPOST", "curviness": 20 },
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{ "from": 1, "to": 1, "text": "down", "curviness": -20 },
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{ "from": 1, "to": 2, "text": "up (no move)" },
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{ "from": 1, "to": 4, "text": "timer" },
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{ "from": 2, "to": 0, "text": "timer\nPOST" },
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{ "from": 2, "to": 3, "text": "down" },
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{ "from": 3, "to": 0, "text": "up\nPOST\n(dblclick\nif no move)" },
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{ "from": 3, "to": 3, "text": "down or timer", "curviness": 20 },
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{ "from": 4, "to": 0, "text": "up\nPOST" },
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{ "from": 4, "to": 4, "text": "down" }
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]
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}
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</textarea></div>
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</body>
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</html>
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