gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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HTML
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover"/>
<meta name="description" content="Create nodes by dragging, thereby specifying their initial size."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Drag Creating Tool</title>
</head>
<body>
<!-- This top nav is not part of the sample code -->
<nav id="navTop" class="w-full z-30 top-0 text-white bg-nwoods-primary">
<div class="w-full container max-w-screen-lg mx-auto flex flex-wrap sm:flex-nowrap items-center justify-between mt-0 py-2">
<div class="md:pl-4">
<a class="text-white hover:text-white no-underline hover:no-underline
font-bold text-2xl lg:text-4xl rounded-lg hover:bg-nwoods-secondary " href="../">
<h1 class="my-0 p-1 ">GoJS</h1>
</a>
</div>
<button id="topnavButton" class="rounded-lg sm:hidden focus:outline-none focus:ring" aria-label="Navigation">
<svg fill="currentColor" viewBox="0 0 20 20" class="w-6 h-6">
<path id="topnavOpen" fill-rule="evenodd" d="M3 5a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1zM3 10a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1zM9 15a1 1 0 011-1h6a1 1 0 110 2h-6a1 1 0 01-1-1z" clip-rule="evenodd"></path>
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</svg>
</button>
<div id="topnavList" class="hidden sm:block items-center w-auto mt-0 text-white p-0 z-20">
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<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/sales/index.html"
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</ul>
</div>
</div>
<hr class="border-b border-gray-600 opacity-50 my-0 py-0" />
</nav>
<div class="md:flex flex-col md:flex-row md:min-h-screen w-full max-w-screen-xl mx-auto">
<div id="navSide" class="flex flex-col w-full md:w-48 text-gray-700 bg-white flex-shrink-0"></div>
<!-- * * * * * * * * * * * * * -->
<!-- Start of GoJS sample code -->
<script src="../release/go.js"></script>
<div id="allSampleContent" class="p-4 w-full">
<script src="DragCreatingTool.js"></script>
<script id="code">
function init() {
var $ = go.GraphObject.make; // for conciseness in defining templates
myDiagram =
new go.Diagram("myDiagramDiv",
{
// Define the template for Nodes, just some text inside a colored rectangle
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),
// temporarily put selected nodes in Foreground layer
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"))),
"undoManager.isEnabled": true
});
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" })
));
// Add an instance of the custom tool defined in DragCreatingTool.js.
// This needs to be inserted before the standard DragSelectingTool,
// which is normally the third Tool in the ToolManager.mouseMoveTools list.
// Note that if you do not set the DragCreatingTool.delay, the default value will
// require a wait after the mouse down event. Not waiting will allow the DragSelectingTool
// and the PanningTool to be able to run instead of the DragCreatingTool, depending on the delay.
myDiagram.toolManager.mouseMoveTools.insertAt(2,
$(DragCreatingTool,
{
isEnabled: true, // disabled by the checkbox
delay: 0, // always canStart(), so PanningTool never gets the chance to run
box: $(go.Part,
{ layerName: "Tool" },
$(go.Shape,
{ name: "SHAPE", fill: null, stroke: "cyan", strokeWidth: 2 })
),
archetypeNodeData: { color: "white" }, // initial properties shared by all nodes
insertPart: function(bounds) { // method override of DragCreatingTool.insertPart
// use a different color each time
this.archetypeNodeData.color = go.Brush.randomColor();
// call the base method to do normal behavior and return its result
return DragCreatingTool.prototype.insertPart.call(this, bounds);
}
}));
}
function toolEnabled() {
var enable = document.getElementById("ToolEnabled").checked;
var tool = myDiagram.toolManager.findTool("DragCreating");
if (tool !== null) tool.isEnabled = enable;
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%;height: 800px"></div>
<label><input id="ToolEnabled" type="checkbox" checked="checked" onclick="toolEnabled()" />DragCreatingTool enabled</label>
<p>
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>.
</p>
<p>
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 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>.
</p>
</div>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</div>
</body>
<!-- This script is part of the gojs.net website, and is not needed to run the sample -->
<script src="../assets/js/goSamples.js"></script>
</html>