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76 lines
4.1 KiB
HTML
Executable File
76 lines
4.1 KiB
HTML
Executable File
<!DOCTYPE html>
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<html>
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<head>
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<title>Drag Creating Tool</title>
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<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
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<meta name="description" content="TypeScript: Create nodes by dragging, thereby specifying their initial size." />
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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: white; border: solid 1px black; width: 100%;height: 800px"></div>
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<label><input id="ToolEnabled" type="checkbox" checked="checked"/>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,
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as <a href="DragCreatingTool.ts">DragCreatingTool.ts</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. The mouse-up event will add a copy
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of the DragCreatingTool.archetypeNodeData object, causing a new node to be created. 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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<script type="module" id="code">
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import * as go from "../release/go-module.js";
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import { DragCreatingTool } from './DragCreatingTool.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', {
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// Define the template for Nodes, just some text inside a colored rectangle
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nodeTemplate: $(go.Node, 'Auto', { minSize: new go.Size(60, 20), resizable: true }, new go.Binding('desiredSize', 'size', go.Size.parse).makeTwoWay(go.Size.stringify), new go.Binding('position', 'pos', go.Point.parse).makeTwoWay(go.Point.stringify),
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// temporarily put selected nodes in ForegFround layer
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new go.Binding('layerName', 'isSelected', (s) => s ? 'Foreground' : '').ofObject(), $(go.Shape, 'Rectangle', new go.Binding('fill', 'color')), $(go.TextBlock, { margin: 2 }, new go.Binding('text', 'color'))),
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'undoManager.isEnabled': true
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});
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myDiagram.add($(go.Part, { layerName: 'Grid', location: new go.Point(0, 0) }, $(go.TextBlock, 'Mouse-down and then drag in the background\nto add a Node there with the drawn size.', { stroke: 'brown' })));
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class CustomDragCreatingTool extends DragCreatingTool {
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insertPart(bounds) {
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if (this.archetypeNodeData === null)
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return null;
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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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// 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, $(CustomDragCreatingTool, {
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isEnabled: true,
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delay: 0,
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box: $(go.Part, { layerName: 'Tool' }, $(go.Shape, { name: 'SHAPE', fill: null, stroke: 'cyan', strokeWidth: 2 })),
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archetypeNodeData: { color: 'white' } // initial properties shared by all nodes
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}));
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window.myDiagram = myDiagram; // Attach to the window for console debugging
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function toolEnabled() {
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const enable = document.getElementById('ToolEnabled').checked;
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const tool = myDiagram.toolManager.findTool('DragCreating');
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if (tool !== null)
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tool.isEnabled = enable;
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}
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</script>
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</body>
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</html> |