339 lines
15 KiB
HTML
339 lines
15 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>Draggable Link</title>
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<meta name="description" content="Drag a link to reconnect it. Nodes have custom Adornments for selection, resizing, and reshaping." />
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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", // must name or refer to the DIV HTML element
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{
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grid: $(go.Panel, "Grid",
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$(go.Shape, "LineH", { stroke: "lightgray", strokeWidth: 0.5 }),
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$(go.Shape, "LineH", { stroke: "gray", strokeWidth: 0.5, interval: 10 }),
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$(go.Shape, "LineV", { stroke: "lightgray", strokeWidth: 0.5 }),
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$(go.Shape, "LineV", { stroke: "gray", strokeWidth: 0.5, interval: 10 })
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),
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allowDrop: true, // must be true to accept drops from the Palette
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"draggingTool.dragsLink": true,
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"draggingTool.isGridSnapEnabled": true,
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"linkingTool.isUnconnectedLinkValid": true,
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"linkingTool.portGravity": 20,
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"relinkingTool.isUnconnectedLinkValid": true,
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"relinkingTool.portGravity": 20,
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"relinkingTool.fromHandleArchetype":
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$(go.Shape, "Diamond", { segmentIndex: 0, cursor: "pointer", desiredSize: new go.Size(8, 8), fill: "tomato", stroke: "darkred" }),
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"relinkingTool.toHandleArchetype":
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$(go.Shape, "Diamond", { segmentIndex: -1, cursor: "pointer", desiredSize: new go.Size(8, 8), fill: "darkred", stroke: "tomato" }),
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"linkReshapingTool.handleArchetype":
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$(go.Shape, "Diamond", { desiredSize: new go.Size(7, 7), fill: "lightblue", stroke: "deepskyblue" }),
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rotatingTool: $(TopRotatingTool), // defined below
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"rotatingTool.snapAngleMultiple": 15,
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"rotatingTool.snapAngleEpsilon": 15,
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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 a function for creating a "port" that is normally transparent.
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// The "name" is used as the GraphObject.portId, the "spot" is used to control how links connect
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// and where the port is positioned on the node, and the boolean "output" and "input" arguments
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// control whether the user can draw links from or to the port.
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function makePort(name, spot, output, input) {
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// the port is basically just a small transparent square
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return $(go.Shape, "Circle",
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{
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fill: null, // not seen, by default; set to a translucent gray by showSmallPorts, defined below
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stroke: null,
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desiredSize: new go.Size(7, 7),
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alignment: spot, // align the port on the main Shape
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alignmentFocus: spot, // just inside the Shape
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portId: name, // declare this object to be a "port"
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fromSpot: spot, toSpot: spot, // declare where links may connect at this port
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fromLinkable: output, toLinkable: input, // declare whether the user may draw links to/from here
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cursor: "pointer" // show a different cursor to indicate potential link point
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});
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}
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var nodeSelectionAdornmentTemplate =
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$(go.Adornment, "Auto",
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$(go.Shape, { fill: null, stroke: "deepskyblue", strokeWidth: 1.5, strokeDashArray: [4, 2] }),
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$(go.Placeholder)
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);
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var nodeResizeAdornmentTemplate =
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$(go.Adornment, "Spot",
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{ locationSpot: go.Spot.Right },
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$(go.Placeholder),
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$(go.Shape, { alignment: go.Spot.TopLeft, cursor: "nw-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.Top, cursor: "n-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.TopRight, cursor: "ne-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.Left, cursor: "w-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.Right, cursor: "e-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.BottomLeft, cursor: "se-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.Bottom, cursor: "s-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { alignment: go.Spot.BottomRight, cursor: "sw-resize", desiredSize: new go.Size(6, 6), fill: "lightblue", stroke: "deepskyblue" })
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);
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var nodeRotateAdornmentTemplate =
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$(go.Adornment,
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{ locationSpot: go.Spot.Center, locationObjectName: "CIRCLE" },
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$(go.Shape, "Circle", { name: "CIRCLE", cursor: "pointer", desiredSize: new go.Size(7, 7), fill: "lightblue", stroke: "deepskyblue" }),
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$(go.Shape, { geometryString: "M3.5 7 L3.5 30", isGeometryPositioned: true, stroke: "deepskyblue", strokeWidth: 1.5, strokeDashArray: [4, 2] })
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);
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myDiagram.nodeTemplate =
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$(go.Node, "Spot",
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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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{ selectable: true, selectionAdornmentTemplate: nodeSelectionAdornmentTemplate },
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{ resizable: true, resizeObjectName: "PANEL", resizeAdornmentTemplate: nodeResizeAdornmentTemplate },
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{ rotatable: true, rotateAdornmentTemplate: nodeRotateAdornmentTemplate },
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new go.Binding("angle").makeTwoWay(),
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// the main object is a Panel that surrounds a TextBlock with a Shape
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$(go.Panel, "Auto",
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{ name: "PANEL" },
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new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
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$(go.Shape, "Rectangle", // default figure
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{
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portId: "", // the default port: if no spot on link data, use closest side
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fromLinkable: true, toLinkable: true, cursor: "pointer",
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fill: "white", // default color
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strokeWidth: 2
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},
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new go.Binding("figure"),
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new go.Binding("fill")),
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$(go.TextBlock,
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{
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font: "bold 11pt Helvetica, Arial, sans-serif",
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margin: 8,
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maxSize: new go.Size(160, NaN),
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wrap: go.TextBlock.WrapFit,
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editable: true
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},
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new go.Binding("text").makeTwoWay())
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),
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// four small named ports, one on each side:
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makePort("T", go.Spot.Top, false, true),
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makePort("L", go.Spot.Left, true, true),
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makePort("R", go.Spot.Right, true, true),
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makePort("B", go.Spot.Bottom, true, false),
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{ // handle mouse enter/leave events to show/hide the ports
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mouseEnter: function(e, node) { showSmallPorts(node, true); },
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mouseLeave: function(e, node) { showSmallPorts(node, false); }
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}
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);
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function showSmallPorts(node, show) {
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node.ports.each(function(port) {
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if (port.portId !== "") { // don't change the default port, which is the big shape
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port.fill = show ? "rgba(0,0,0,.3)" : null;
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}
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});
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}
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var linkSelectionAdornmentTemplate =
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$(go.Adornment, "Link",
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$(go.Shape,
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// isPanelMain declares that this Shape shares the Link.geometry
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{ isPanelMain: true, fill: null, stroke: "deepskyblue", strokeWidth: 0 }) // use selection object's strokeWidth
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);
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myDiagram.linkTemplate =
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$(go.Link, // the whole link panel
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{ selectable: true, selectionAdornmentTemplate: linkSelectionAdornmentTemplate },
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{ relinkableFrom: true, relinkableTo: true, reshapable: true },
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{
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routing: go.Link.AvoidsNodes,
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curve: go.Link.JumpOver,
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corner: 5,
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toShortLength: 4
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},
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new go.Binding("points").makeTwoWay(),
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$(go.Shape, // the link path shape
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{ isPanelMain: true, strokeWidth: 2 }),
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$(go.Shape, // the arrowhead
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{ toArrow: "Standard", stroke: null }),
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$(go.Panel, "Auto",
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new go.Binding("visible", "isSelected").ofObject(),
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$(go.Shape, "RoundedRectangle", // the link shape
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{ fill: "#F8F8F8", stroke: null }),
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$(go.TextBlock,
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{
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textAlign: "center",
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font: "10pt helvetica, arial, sans-serif",
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stroke: "#919191",
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margin: 2,
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minSize: new go.Size(10, NaN),
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editable: true
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},
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new go.Binding("text").makeTwoWay())
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)
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);
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load(); // load an initial diagram from some JSON text
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// initialize the Palette that is on the left side of the page
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myPalette =
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$(go.Palette, "myPaletteDiv", // must name or refer to the DIV HTML element
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{
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maxSelectionCount: 1,
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nodeTemplateMap: myDiagram.nodeTemplateMap, // share the templates used by myDiagram
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linkTemplate: // simplify the link template, just in this Palette
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$(go.Link,
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{ // because the GridLayout.alignment is Location and the nodes have locationSpot == Spot.Center,
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// to line up the Link in the same manner we have to pretend the Link has the same location spot
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locationSpot: go.Spot.Center,
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selectionAdornmentTemplate:
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$(go.Adornment, "Link",
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{ locationSpot: go.Spot.Center },
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$(go.Shape,
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{ isPanelMain: true, fill: null, stroke: "deepskyblue", strokeWidth: 0 }),
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$(go.Shape, // the arrowhead
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{ toArrow: "Standard", stroke: null })
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)
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},
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{
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routing: go.Link.AvoidsNodes,
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curve: go.Link.JumpOver,
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corner: 5,
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toShortLength: 4
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},
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new go.Binding("points"),
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$(go.Shape, // the link path shape
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{ isPanelMain: true, strokeWidth: 2 }),
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$(go.Shape, // the arrowhead
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{ toArrow: "Standard", stroke: null })
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),
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model: new go.GraphLinksModel([ // specify the contents of the Palette
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{ text: "Start", figure: "Circle", fill: "#00AD5F" },
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{ text: "Step" },
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{ text: "DB", figure: "Database", fill: "lightgray" },
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{ text: "???", figure: "Diamond", fill: "lightskyblue" },
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{ text: "End", figure: "Circle", fill: "#CE0620" },
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{ text: "Comment", figure: "RoundedRectangle", fill: "lightyellow" }
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], [
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// the Palette also has a disconnected Link, which the user can drag-and-drop
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{ points: new go.List(go.Point).addAll([new go.Point(0, 0), new go.Point(30, 0), new go.Point(30, 40), new go.Point(60, 40)]) }
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])
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});
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}
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function TopRotatingTool() {
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go.RotatingTool.call(this);
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}
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go.Diagram.inherit(TopRotatingTool, go.RotatingTool);
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/** @override */
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TopRotatingTool.prototype.updateAdornments = function(part) {
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go.RotatingTool.prototype.updateAdornments.call(this, part);
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var adornment = part.findAdornment("Rotating");
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if (adornment !== null) {
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adornment.location = part.rotateObject.getDocumentPoint(new go.Spot(0.5, 0, 0, -30)); // above middle top
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}
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};
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/** @override */
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TopRotatingTool.prototype.rotate = function(newangle) {
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go.RotatingTool.prototype.rotate.call(this, newangle + 90);
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};
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// end of TopRotatingTool class
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// Show the diagram's model in JSON format that the user may edit
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function save() {
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saveDiagramProperties(); // do this first, before writing to JSON
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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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loadDiagramProperties(); // do this after the Model.modelData has been brought into memory
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}
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function saveDiagramProperties() {
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myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);
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}
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function loadDiagramProperties(e) {
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// set Diagram.initialPosition, not Diagram.position, to handle initialization side-effects
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var pos = myDiagram.model.modelData.position;
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if (pos) myDiagram.initialPosition = go.Point.parse(pos);
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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 style="width:100%; white-space:nowrap;">
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<span style="display: inline-block; vertical-align: top; width:105px">
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<div id="myPaletteDiv" style="border: solid 1px black; height: 620px"></div>
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</span>
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<span style="display: inline-block; vertical-align: top; width:80%">
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<div id="myDiagramDiv" style="border: solid 1px black; height: 620px"></div>
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</span>
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</div>
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<p>
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This sample demonstrates the ability for the user to drag around a Link as if it were a Node.
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When either end of the link passes over a valid port, the port is highlighted.
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</p>
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<p>
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The link-dragging functionality is enabled by setting some or all of the following properties:
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<a>DraggingTool.dragsLink</a>, <a>LinkingTool.isUnconnectedLinkValid</a>, and
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<a>RelinkingTool.isUnconnectedLinkValid</a>.
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</p>
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<p>
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Note that a Link is present in the <a>Palette</a> so that it too can be dragged out and onto
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the main Diagram. Because links are not automatically routed when either end is not connected
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with a Node, the route is provided explicitly when that Palette item is defined.
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</p>
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<p>
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This also demonstrates several custom Adornments:
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<a>Part.selectionAdornmentTemplate</a>, <a>Part.resizeAdornmentTemplate</a>, and
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<a>Part.rotateAdornmentTemplate</a>.
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</p>
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<p>
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Finally this sample demonstrates saving and restoring the <a>Diagram.position</a> as a property
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on the <a>Model.modelData</a> object that is automatically saved and restored when calling <a>Model.toJson</a>
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and <a>Model.fromJson</a>.
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</p>
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<div>
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<div>
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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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</div>
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<textarea id="mySavedModel" style="width:100%;height:300px">
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{ "class": "go.GraphLinksModel",
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"linkFromPortIdProperty": "fromPort",
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"linkToPortIdProperty": "toPort",
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"nodeDataArray": [
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],
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"linkDataArray": [
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]}
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</textarea>
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</div>
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</div>
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</body>
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</html>
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