112 lines
4.2 KiB
HTML
112 lines
4.2 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
|
<title>Draggable Link Labels That Stay On Path</title>
|
|
<!-- Copyright 1998-2017 by Northwoods Software Corporation. -->
|
|
<meta charset="UTF-8">
|
|
<script src="../release/go.js"></script>
|
|
<script src="LinkLabelOnPathDraggingTool.js"></script>
|
|
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
|
|
<script id="code">
|
|
function init() {
|
|
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
|
|
var $ = go.GraphObject.make;
|
|
|
|
myDiagram =
|
|
$(go.Diagram, "myDiagramDiv", // the ID of the DIV HTML element
|
|
{
|
|
initialContentAlignment: go.Spot.Center,
|
|
layout: $(go.ForceDirectedLayout,
|
|
{ defaultSpringLength: 50, defaultElectricalCharge: 50 }),
|
|
"undoManager.isEnabled": true
|
|
});
|
|
|
|
// install the LinkLabelDraggingTool as a "mouse move" tool
|
|
myDiagram.toolManager.mouseMoveTools.insertAt(0, new LinkLabelOnPathDraggingTool());
|
|
|
|
myDiagram.nodeTemplate =
|
|
$(go.Node, go.Panel.Auto,
|
|
{ locationSpot: go.Spot.Center },
|
|
$(go.Shape,
|
|
{
|
|
fill: "orange", // default fill color
|
|
portId: "",
|
|
fromLinkable: true,
|
|
fromSpot: go.Spot.AllSides,
|
|
toLinkable: true,
|
|
toSpot: go.Spot.AllSides,
|
|
cursor: "pointer"
|
|
},
|
|
new go.Binding("fill", "color")),
|
|
$(go.TextBlock,
|
|
{ margin: 10, font: "bold 12pt sans-serif" },
|
|
new go.Binding("text"))
|
|
);
|
|
|
|
myDiagram.linkTemplate =
|
|
$(go.Link,
|
|
{
|
|
routing: go.Link.AvoidsNodes,
|
|
corner: 5,
|
|
relinkableFrom: true,
|
|
relinkableTo: true,
|
|
reshapable: true,
|
|
resegmentable: true
|
|
},
|
|
$(go.Shape),
|
|
$(go.Shape, { toArrow: "OpenTriangle" }),
|
|
$(go.Panel, "Auto",
|
|
{ _isLinkLabel: true }, // marks this Panel as being a draggable label
|
|
$(go.Shape, { fill: "white" }),
|
|
$(go.TextBlock, "?", { margin: 3 },
|
|
new go.Binding("text", "color")),
|
|
// remember any modified segment properties in the link data object
|
|
new go.Binding("segmentIndex").makeTwoWay(),
|
|
new go.Binding("segmentFraction").makeTwoWay()
|
|
)
|
|
);
|
|
|
|
// create a few nodes and links
|
|
myDiagram.model = new go.GraphLinksModel([
|
|
{ key: 1, text: "one", color: "lightyellow" },
|
|
{ key: 2, text: "two", color: "brown" },
|
|
{ key: 3, text: "three", color: "green" },
|
|
{ key: 4, text: "four", color: "slateblue" },
|
|
{ key: 5, text: "five", color: "aquamarine" },
|
|
{ key: 6, text: "six", color: "lightgreen" },
|
|
{ key: 7, text: "seven" }
|
|
], [
|
|
{ from: 5, to: 6, color: "orange" },
|
|
{ from: 1, to: 2, color: "red" },
|
|
{ from: 1, to: 3, color: "blue" },
|
|
{ from: 1, to: 4, color: "goldenrod" },
|
|
{ from: 2, to: 5, color: "fuchsia" },
|
|
{ from: 3, to: 5, color: "green" },
|
|
{ from: 4, to: 5, color: "black" },
|
|
{ from: 6, to: 7 }
|
|
]);
|
|
}
|
|
</script>
|
|
</head>
|
|
<body onload="init()">
|
|
<div id="sample">
|
|
<div id="myDiagramDiv" style="background-color: whitesmoke; border: solid 1px black; width: 100%; height: 600px"></div>
|
|
<p>
|
|
This sample demonstrates a custom Tool, LinkLabelOnPathDraggingTool, that allows the user to drag the label of a Link,
|
|
but that keeps the label exactly on the path of the link.
|
|
The tool is defined at <a href="LinkLabelOnPathDraggingTool.js">LinkLabelOnPathDraggingTool.js</a>.
|
|
</p>
|
|
<p>
|
|
The label on the link can be any arbitrarily complex object. It is positioned by the <a>GraphObject.segmentIndex</a>
|
|
and <a>GraphObject.segmentFraction</a> properties, which are set by the LinkLabelOnPathDraggingTool.
|
|
TwoWay Bindings on those two properties automatically remember any modified values on the link data object in the model.
|
|
</p>
|
|
<p>
|
|
The tool is derived from a similar tool, <a href="LinkLabelDraggingTool.js">LinkLabelDraggingTool.js</a>,
|
|
that allows the user to drag the label in any direction from the mid-point of the Link path.
|
|
</p>
|
|
</div>
|
|
</body>
|
|
</html>
|