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133 lines
5.3 KiB
HTML
Executable File
133 lines
5.3 KiB
HTML
Executable File
<!DOCTYPE html>
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<html>
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<head>
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<title>A Single Page Diagram</title>
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<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
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<meta name="description" content="A diagram that shows a sheet of paper; nodes cannot be dragged or resized beyond the edge of the sheet." />
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<meta name="viewport" content="width=device-width, initial-scale=1">
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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;
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var pageSize = new go.Size(612, 792);
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var pageMargin = new go.Margin(10);
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var usableMargin = new go.Margin(10);
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var pageBounds = new go.Rect(-usableMargin.left, -usableMargin.top, pageSize.width, pageSize.height);
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var usableArea = pageBounds.copy().subtractMargin(usableMargin);
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myDiagram =
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$(go.Diagram, "myDiagramDiv",
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{
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fixedBounds: pageBounds.copy().addMargin(pageMargin),
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initialAutoScale: go.Diagram.Uniform,
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"animationManager.isInitial": false,
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"undoManager.isEnabled": true,
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"resizingTool.doMouseMove": function() {
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var e = this.diagram.lastInput;
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e.documentPoint = limitPoint(e.documentPoint);
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e.viewPoint = this.diagram.transformDocToView(e.documentPoint);
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go.ResizingTool.prototype.doMouseMove.call(this);
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},
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"resizingTool.doMouseUp": function() {
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var e = this.diagram.lastInput;
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e.documentPoint = limitPoint(e.documentPoint);
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e.viewPoint = this.diagram.transformDocToView(e.documentPoint);
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go.ResizingTool.prototype.doMouseUp.call(this);
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},
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"TextEdited": function(e) {
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var node = e.subject.part;
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node.ensureBounds(); // has been resized, compute its new bounds
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var pt = limitPoint(node.location);
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node.location = stayInFixedArea(node, pt, pt);
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}
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});
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// the background Part showing the sheet of paper;
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// it has the fixed bounds of the diagram contents
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myDiagram.add(
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$(go.Part, "Grid",
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{
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layerName: "Grid",
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position: pageBounds.position,
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desiredSize: pageSize,
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isShadowed: true,
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background: "floralwhite"
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},
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$(go.Shape, "LineH", { stroke: "lightgray", strokeWidth: 0.5 }),
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$(go.Shape, "LineV", { stroke: "lightgray", strokeWidth: 0.5 })
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));
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// this function is the Node.dragComputation, to limit the movement of the parts
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// use GRIDPT instead of PT if DraggingTool.isGridSnapEnabled and movement should snap to grid
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function stayInFixedArea(part, pt, gridpt) {
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var diagram = part.diagram;
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if (diagram === null) return pt;
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// compute the document area without padding
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var v = usableArea;
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// get the bounds of the part being dragged
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var b = part.actualBounds;
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var loc = part.location;
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// now limit the location appropriately
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var x = Math.max(v.x, Math.min(pt.x, v.right - b.width)) + (loc.x - b.x);
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var y = Math.max(v.y, Math.min(pt.y, v.bottom - b.height)) + (loc.y - b.y);
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return new go.Point(x, y);
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}
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function limitPoint(p) {
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return new go.Point(Math.max(usableArea.left, Math.min(p.x, usableArea.right)),
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Math.max(usableArea.top, Math.min(p.y, usableArea.bottom)));
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}
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myDiagram.nodeTemplate =
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$(go.Node, "Auto",
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{
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resizable: true, // but limited by overrides of ResizingTool methods, above
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dragComputation: stayInFixedArea // this limits the DraggingTool
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},
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$(go.Shape,
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{ fill: "white", portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer" },
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new go.Binding("fill", "color")),
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$(go.TextBlock,
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{ margin: 8, editable: true },
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new go.Binding("text").makeTwoWay())
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);
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myDiagram.linkTemplate =
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$(go.Link,
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{ relinkableFrom: true, relinkableTo: true },
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$(go.Shape),
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$(go.Shape, { toArrow: "OpenTriangle" })
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);
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myDiagram.model = new go.GraphLinksModel(
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[
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{ key: 1, text: "Alpha", color: "lightblue" },
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{ key: 2, text: "Beta", color: "orange" },
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{ key: 3, text: "Gamma", color: "lightgreen" },
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{ key: 4, text: "Delta", color: "pink" }
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],
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[
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{ from: 1, to: 2 },
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{ from: 1, to: 3 },
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{ from: 2, to: 2 },
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{ from: 3, to: 4 },
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{ from: 4, to: 1 }
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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:600px"></div>
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This pretends to show a sheet of paper with the diagram on it.
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Both the <a>DraggingTool</a> and the <a>ResizingTool</a> are constrained to keep the nodes within
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the area of the sheet of paper, minus the margins.
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The user can zoom and scroll/pan normally.
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There are several variables, such as <code>pageSize</code>, that govern how the diagram is set up.
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</div>
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</body>
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</html> |