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197 lines
9.3 KiB
HTML
Executable File
197 lines
9.3 KiB
HTML
Executable File
<!DOCTYPE html>
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<html>
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<head>
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<title>State Chart with Draggable Node Labels</title>
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<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
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<meta name="description" content="TypeScript: Allow the user to shift the label of a node." />
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
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</head>
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<body>
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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 NodeLabelDraggingTool that is defined in its own file, as <a href="NodeLabelDraggingTool.ts">NodeLabelDraggingTool.ts</a>.
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</p>
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<p>
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Note that after dragging a node label you can move that node and the label maintains the same position relative to the node.
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That relative position is specified by the <a>GraphObject.alignment</a> property, used by the "Spot" <a>Panel</a>.
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This sample also saves any changes to that property by means of a TwoWay <a>Binding</a>.
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</p>
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<button id="SaveButton">Save</button>
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<button id="LoadButton">Load</button> 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>
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</div>
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<script type="module" id="code">
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import * as go from "../release/go-module.js";
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import { NodeLabelDraggingTool } from './NodeLabelDraggingTool.js';
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if (window.goSamples) window.goSamples(); // init for these samples -- you don't need to call this
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const $ = go.GraphObject.make; // for conciseness in defining templates
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const 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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// 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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// enable undo & redo
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'undoManager.isEnabled': true
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});
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// install the NodeLabelDraggingTool as a "mouse move" tool
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myDiagram.toolManager.mouseMoveTools.insertAt(0, new NodeLabelDraggingTool());
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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', (e) => {
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const button = document.getElementById('SaveButton');
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if (button)
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button.disabled = !myDiagram.isModified;
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const idx = document.title.indexOf('*');
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if (myDiagram.isModified) {
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if (idx < 0)
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document.title += '*';
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}
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else {
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if (idx >= 0)
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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, 'Spot', { locationObjectName: 'ICON', locationSpot: go.Spot.Center }, new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify), { selectionObjectName: 'ICON' },
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// define the node primary shape
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$(go.Shape, 'RoundedRectangle', {
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name: 'ICON',
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parameter1: 10,
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desiredSize: new go.Size(40, 40),
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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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}), $(go.Shape, // provide interior area where the user can grab the node
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{ fill: 'transparent', stroke: null, desiredSize: new go.Size(30, 30) }), $(go.TextBlock, {
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font: 'bold 11pt helvetica, bold arial, sans-serif',
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editable: true,
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_isNodeLabel: true,
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cursor: 'move' // visual hint that the user can do something with this node label
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}, new go.Binding('text', 'text').makeTwoWay(),
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// The GraphObject.alignment property is what the NodeLabelDraggingTool modifies.
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// This TwoWay binding saves any changes to the same named property on the node data.
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new go.Binding('alignment', 'alignment', go.Spot.parse).makeTwoWay(go.Spot.stringify)));
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// unlike the normal selection Adornment, this one includes a Button
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myDiagram.nodeTemplate.selectionAdornmentTemplate =
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$(go.Adornment, 'Spot', $(go.Panel, 'Auto', $(go.Shape, { fill: null, stroke: 'blue', strokeWidth: 2 }), $(go.Placeholder) // this represents the selected Node
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),
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// the button to create a "next" node, at the top-right corner
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$('Button', {
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alignment: go.Spot.TopRight,
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click: addNodeAndLink // this function is defined below
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}, $(go.Shape, 'PlusLine', { desiredSize: new go.Size(6, 6) })) // 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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const adorn = obj.part;
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const fromNode = adorn.adornedPart;
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if (fromNode === null)
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return;
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e.handled = true;
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const diagram = e.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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const 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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const toData = { text: 'new' };
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const 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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const 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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const linkdata = {
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from: model.getKeyForNodeData(fromData),
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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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const 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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if (newnode !== null)
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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, adjusting: go.Link.Stretch, reshapable: true }, new go.Binding('points').makeTwoWay(), new go.Binding('curviness', 'curviness'), $(go.Shape, // the link shape
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{ strokeWidth: 1.5 }), $(go.Shape, // the arrowhead
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{ toArrow: 'standard', stroke: null }), $(go.Panel, 'Auto', $(go.Shape, // the label background, which becomes transparent around the edges
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{
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fill: $(go.Brush, 'Radial', { 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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}), $(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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}, new go.Binding('text', 'text').makeTwoWay())));
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// read in the JSON-format data from the "mySavedModel" element
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load();
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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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document.getElementById("SaveButton").onclick = app.save;
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document.getElementById("LoadButton").onclick = app.load;
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window.myDiagram = myDiagram; // Attach to the window for console debugging
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</script>
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</body>
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</html> |