此示例更改链接数据的“to”属性，使链接连接到不同的节点.复制如下内容保存到空白的.html文件中，用浏览器打开即可查看效果
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>GoJS实例</title>
<style>
#myDiagramDiv {
400px;
height: 500px;
background-color: #DAE4E4;
}
</style>
<script src="https://unpkg.com/gojs/release/go-debug.js"></script>
</head>
<body>
<div id="myDiagramDiv"></div>
<script>
//为了简洁
var $ = go.GraphObject.make;
var diagram = new go.Diagram("myDiagramDiv");
diagram.nodeTemplate =
$(go.Node, "Auto", {
locationSpot: go.Spot.Center
},
$(go.Shape, "RoundedRectangle", {
fill: "yellow",
stroke: "orange",
strokeWidth: 2
}),
$(go.TextBlock, {
margin: 5
},
new go.Binding("text", "key"))
);
var nodeDataArray = [{
key: "Alpha"
},
{
key: "Beta"
},
{
key: "Gamma"
}
];
var linkDataArray = [{
from: "Alpha",
to: "Beta"
}];
diagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
function switchTo() {
var model = diagram.model;
// 所有模型更改都应在事务中发生
model.startTransaction("reconnect link");
var data = model.linkDataArray[0]; // 获取第一个链接数据
if (model.getToKeyForLinkData(data) === "Beta") {
model.setToKeyForLinkData(data, "Gamma");
} else {
model.setToKeyForLinkData(data, "Beta");
}
model.commitTransaction("reconnect link");
}
function loop() {
setTimeout(function () {
switchTo();
loop();
}, 1000);
}
loop();
</script>
</body>
</html>
此示例点击不同的节点转换颜色.复制如下内容保存到空白的.html文件中，用浏览器打开即可查看效果
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>GoJS实例</title>
<style>
#myDiagramDiv {
400px;
height: 500px;
background-color: #DAE4E4;
}
</style>
<script src="https://unpkg.com/gojs/release/go-debug.js"></script>
</head>
<body>
<div id="myDiagramDiv"></div>
<script>
//为了简洁
var $ = go.GraphObject.make;
var diagram = new go.Diagram("myDiagramDiv");
diagram.nodeTemplate =
$(go.Node, "Auto", {
selectionAdorned: false
}, // no blue selection handle!
$(go.Shape, "RoundedRectangle", {
fill: "white"
},
// bind Shape.fill to Part.isSelected converted to a color
new go.Binding("fill", "isSelected", function (sel) {
return sel ? "dodgerblue" : "lightgreen";
}).ofObject()), // no name means bind to the whole Part
$(go.TextBlock, {
margin: 5
},
new go.Binding("text", "descr"))
);
diagram.model.nodeDataArray = [{
descr: "Select me!"
},
{
descr: "I turn blue when selected."
}
];
</script>
</body>
</html>
移动节点.复制如下内容保存到空白的.html文件中，用浏览器打开即可查看效果
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>GoJS实例</title>
<style>
#myDiagramDiv {
400px;
height: 500px;
background-color: #DAE4E4;
}
</style>
<script src="https://unpkg.com/gojs/release/go-debug.js"></script>
</head>
<body>
<div id="myDiagramDiv"></div>
<p id="bindTwoWayData" onclick='shiftNode()'></p>
<script>
//为了简洁
var $ = go.GraphObject.make;
var diagram = new go.Diagram("myDiagramDiv");
diagram.nodeTemplate =
$(go.Node, "Auto", {
locationSpot: go.Spot.Center
},
new go.Binding("location", "loc").makeTwoWay(), // 双向绑定
$(go.Shape, "RoundedRectangle", {
fill: "lightblue",
stroke: "blue",
strokeWidth: 2
}),
$(go.TextBlock, {
margin: 5
},
new go.Binding("text", "key"))
);
var nodeDataArray = [{
key: "Alpha",
loc: new go.Point(0, 0)
}];
diagram.model = new go.GraphLinksModel(nodeDataArray);
shiftNode = (function () { //定义一个名为"shiftNode"的回调函数，当点击时触发
// 所有的model中做出的改变都应该在事务中
diagram.startTransaction("shift node");
var data = diagram.model.nodeDataArray[0]; // get the first node data
var node = diagram.findNodeForData(data); // find the corresponding Node
var p = node.location.copy(); // make a copy of the location, a Point
p.x += 20;
if (p.x > 200) p.x = 0;
// changing the Node.location also changes the data.loc property due to TwoWay binding
node.location = p;
// show the updated location held by the "loc" property of the node data
document.getElementById("bindTwoWayData").textContent = data.loc.toString();
diagram.commitTransaction("shift node");
});
shiftNode(); // initialize everything
</script>
</body>
</html>