91 lines
4.3 KiB
HTML
91 lines
4.3 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>Drag Creating Tool</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="DragCreatingTool.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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$(go.Diagram, "myDiagramDiv",
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{
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// Define the template for Nodes, just some text inside a colored rectangle
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nodeTemplate:
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$(go.Node, "Auto",
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{ minSize: new go.Size(60, 20), resizable: true },
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new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
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new go.Binding("position", "pos", go.Point.parse).makeTwoWay(go.Point.stringify),
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// temporarily put selected nodes in Foreground layer
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new go.Binding("layerName", "isSelected", function(s) { return s ? "Foreground" : ""; }).ofObject(),
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$(go.Shape, "Rectangle",
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new go.Binding("fill", "color")),
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$(go.TextBlock,
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{ margin: 2 },
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new go.Binding("text", "color"))),
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"undoManager.isEnabled": true
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});
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myDiagram.add(
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$(go.Part,
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{ layerName: "Grid", location: new go.Point(0, 0) },
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$(go.TextBlock, "Mouse-down and then drag in the background\nto add a Node there with the drawn size.",
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{ stroke: "brown" })
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));
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// Add an instance of the custom tool defined in DragCreatingTool.js.
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// This needs to be inserted before the standard DragSelectingTool,
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// which is normally the third Tool in the ToolManager.mouseMoveTools list.
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// Note that if you do not set the DragCreatingTool.delay, the default value will
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// require a wait after the mouse down event. Not waiting will allow the DragSelectingTool
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// and the PanningTool to be able to run instead of the DragCreatingTool, depending on the delay.
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myDiagram.toolManager.mouseMoveTools.insertAt(2,
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$(DragCreatingTool,
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{
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isEnabled: true, // disabled by the checkbox
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delay: 0, // always canStart(), so PanningTool never gets the chance to run
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box: $(go.Part,
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{ layerName: "Tool" },
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$(go.Shape,
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{ name: "SHAPE", fill: null, stroke: "cyan", strokeWidth: 2 })
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),
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archetypeNodeData: { color: "white" }, // initial properties shared by all nodes
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insertPart: function(bounds) { // override DragCreatingTool.insertPart
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// use a different color each time
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this.archetypeNodeData.color = go.Brush.randomColor();
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// call the base method to do normal behavior and return its result
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return DragCreatingTool.prototype.insertPart.call(this, bounds);
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}
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}));
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}
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function toolEnabled() {
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var enable = document.getElementById("ToolEnabled").checked;
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var tool = myDiagram.toolManager.findTool("DragCreating");
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if (tool !== null) tool.isEnabled = enable;
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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: white; border: solid 1px black; width: 100%;height: 800px"></div>
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<label><input id="ToolEnabled" type="checkbox" checked="checked" onclick="toolEnabled()" />DragCreatingTool enabled</label>
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<p>
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This sample demonstrates the DragCreatingTool, which replaces the standard DragSelectingTool. It is defined in its own file, as <a href="DragCreatingTool.js">DragCreatingTool.js</a>.
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</p>
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<p>
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Press in the background and then drag to show the area to be occupied by the new node.
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The mouse-up event will add a copy of the DragCreatingTool.archetypeNodeData object, causing a new node to be created.
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The tool will assign its <a>GraphObject.position</a> and <a>GraphObject.desiredSize</a>.
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</p>
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</div>
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</body>
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</html>
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