206 lines
9.1 KiB
HTML
206 lines
9.1 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>Dragging a Field from a Record onto an HTML Element</title>
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<meta name="description" content="Drag an item from a node out of the diagram and onto another HTML element." />
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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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// Custom DraggingTool for dragging fields instead of whole Parts.
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// FieldDraggingTool.fieldTemplate needs to be set to a template of the field that you want shown while dragging.
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function FieldDraggingTool() {
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go.DraggingTool.call(this);
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this.fieldTemplate = null; // THIS NEEDS TO BE SET before a drag starts
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this.temporaryPart = null;
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}
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go.Diagram.inherit(FieldDraggingTool, go.DraggingTool);
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// override this method
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/** @override */
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FieldDraggingTool.prototype.findDraggablePart = function() {
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var diagram = this.diagram;
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var obj = diagram.findObjectAt(diagram.lastInput.documentPoint);
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while (obj !== null && obj.type !== go.Panel.TableRow) obj = obj.panel;
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if (obj !== null && obj.type === go.Panel.TableRow &&
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this.fieldTemplate !== null && this.temporaryPart === null) {
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var tempPart =
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go.GraphObject.make(go.Node, "Table",
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{ layerName: "Tool", locationSpot: go.Spot.Center },
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this.fieldTemplate.copy()); // copy the template!
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this.temporaryPart = tempPart;
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// assume OBJ is now a Panel representing a field, bound to field data
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// update the temporary Part via data binding
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tempPart.location = diagram.lastInput.documentPoint; // need to set location explicitly
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diagram.add(tempPart); // add to Diagram before setting data
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tempPart.data = obj.data; // bind to the same field data as being dragged
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return tempPart;
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}
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return go.DraggingTool.prototype.findDraggablePart.call(this);
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};
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/** @override */
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FieldDraggingTool.prototype.doActivate = function() {
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if (this.temporaryPart === null) return go.DraggingTool.prototype.doActivate.call(this);
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var diagram = this.diagram;
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this.standardMouseSelect();
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this.isActive = true;
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// instead of the usual result of computeEffectiveCollection, just use the temporaryPart alone
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var map = new go.Map(go.Part, Object);
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map.add(this.temporaryPart, { point: diagram.lastInput.documentPoint.copy() });
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this.draggedParts = map;
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this.startTransaction("Drag Field");
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diagram.isMouseCaptured = true;
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};
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/** @override */
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FieldDraggingTool.prototype.doDeactivate = function() {
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if (this.temporaryPart === null) return go.DraggingTool.prototype.doDeactivate.call(this);
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var diagram = this.diagram;
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// make sure the temporary Part is no longer in the Diagram
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diagram.remove(this.temporaryPart);
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this.temporaryPart = null;
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// now do all the standard deactivation cleanup,
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// including setting isActive = false, clearing out draggedParts, calling stopTransaction(),
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// and setting diagram.isMouseCaptured = false
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go.DraggingTool.prototype.doDeactivate.call(this);
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};
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/** @override */
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FieldDraggingTool.prototype.doMouseMove = function() {
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if (!this.isActive) return;
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if (this.temporaryPart === null) return go.DraggingTool.prototype.doMouseMove.call(this);
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var diagram = this.diagram;
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// just move the temporaryPart (in draggedParts), without regard to moving or copying permissions of the Node
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var offset = diagram.lastInput.documentPoint.copy().subtract(diagram.firstInput.documentPoint);
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this.moveParts(this.draggedParts, offset, false);
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};
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/** @override */
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FieldDraggingTool.prototype.doMouseUp = function() {
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if (!this.isActive) return;
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if (this.temporaryPart === null) return go.DraggingTool.prototype.doMouseUp.call(this);
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var diagram = this.diagram;
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var data = this.temporaryPart.data;
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if (diagram.lastInput.event && diagram.lastInput.event.target.id === "myDroppedFields") {
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document.getElementById("myDroppedFields").textContent += data.name + " (" + data.info + ")\n";
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}
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this.transactionResult = "Dragged Field";
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this.stopTool();
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};
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// end of FieldDraggingTool
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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.Center,
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validCycle: go.Diagram.CycleNotDirected, // don't allow loops
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draggingTool: $(FieldDraggingTool), // use custom DraggingTool
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"undoManager.isEnabled": true
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});
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// This template is a Panel that is used to represent each item in a Panel.itemArray.
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// The Panel is data bound to the item object.
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var fieldTemplate =
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$(go.Panel, "TableRow", // this Panel is a row in the containing Table
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new go.Binding("portId", "name"), // this Panel is a "port"
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{ background: "transparent", // so this port's background can be picked by the mouse
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fromSpot: go.Spot.Right, // links only go from the right side to the left side
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toSpot: go.Spot.Left }, // allow drawing links from or to this port
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$(go.Shape,
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{ width: 12, height: 12, column: 0, strokeWidth: 2, margin: 4 },
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new go.Binding("figure", "figure"),
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new go.Binding("fill", "color")),
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$(go.TextBlock,
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{ margin: new go.Margin(0, 2), column: 1, font: "bold 13px sans-serif" },
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new go.Binding("text", "name")),
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$(go.TextBlock,
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{ margin: new go.Margin(0, 2), column: 2, font: "13px sans-serif" },
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new go.Binding("text", "info"))
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);
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// the FieldDraggingTool needs a template for what to show while dragging
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myDiagram.toolManager.draggingTool.fieldTemplate = fieldTemplate;
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// This template represents a whole "record".
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myDiagram.nodeTemplate =
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$(go.Node, "Auto",
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{ movable: false,
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copyable: false,
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deletable: false },
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new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
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// this rectangular shape surrounds the content of the node
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$(go.Shape,
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{ fill: "#EEEEEE" }),
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// the content consists of a header and a list of items
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$(go.Panel, "Vertical",
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// this is the header for the whole node
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$(go.Panel, "Auto",
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{ stretch: go.GraphObject.Horizontal }, // as wide as the whole node
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$(go.Shape,
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{ fill: "#1570A6", stroke: null }),
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$(go.TextBlock,
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{
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alignment: go.Spot.Center,
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margin: 3,
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stroke: "white",
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textAlign: "center",
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font: "bold 12pt sans-serif"
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},
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new go.Binding("text", "key"))),
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// this Panel holds a Panel for each item object in the itemArray;
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// each item Panel is defined by the itemTemplate to be a TableRow in this Table
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$(go.Panel, "Table",
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{
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name: "TABLE",
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padding: 2,
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minSize: new go.Size(100, 10),
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defaultStretch: go.GraphObject.Horizontal,
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itemTemplate: fieldTemplate
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},
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new go.Binding("itemArray", "fields")
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) // end Table Panel of items
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) // end Vertical Panel
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); // end Node
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myDiagram.model =
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$(go.GraphLinksModel,
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{ linkFromPortIdProperty: "fromPort",
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linkToPortIdProperty: "toPort",
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copiesArrays: true,
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copiesArrayObjects: true,
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nodeDataArray: [
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{ key: "Record1",
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fields: [
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{ name: "field1", info: "", color: "#F7B84B", figure: "Ellipse" },
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{ name: "field2", info: "the second one", color: "#F25022", figure: "Ellipse" },
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{ name: "fieldThree", info: "3rd", color: "#00BCF2" }
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],
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loc: "0 0" },
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{ key: "Record2",
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fields: [
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{ name: "fieldA", info: "", color: "#FFB900", figure: "Diamond" }
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],
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loc: "250 0" }
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]
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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:300px"></div>
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<p>Drag a field from one of the record nodes and drop onto the PRE element below.
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The "record" Nodes are not movable or copyable or deletable.</p>
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<p>Here you can drop a field from one of the records above:</p>
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<pre id="myDroppedFields" style="width:200px;height:300px;border:dashed"></pre>
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</div>
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</body>
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</html> |