gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
93 lines (86 loc) • 4.54 kB
HTML
<html>
<head>
<meta charset="UTF-8">
<title>Drag Creating Tool</title>
<meta name="description" content="Create nodes by dragging, thereby specifying their initial size." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
<script src="../release/go.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<script src="DragCreatingTool.js"></script>
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
var $ = go.GraphObject.make; // for conciseness in defining templates
myDiagram =
$(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", function(s) { return 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) { // override 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;
}
</script>
</head>
<body onload="init()">
<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>
</body>
</html>