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 name="viewport" content="width=device-width, initial-scale=1">
<title>Draggable Link</title>
<meta name="description"
content="Drag a link to reconnect it. Nodes have custom Adornments for selection, resizing, and reshaping." />
<meta charset="UTF-8">
<script src="https://unpkg.com/gojs/release/go-debug.js"></script>
<script id="code">
function init() {
if (window.goSamples) goSamples(); // 这些样本的init - 你不需要调用它
var $ = go.GraphObject.make; // 为了简洁定义模板
myDiagram =
$(go.Diagram, "myDiagramDiv", // 必须命名或引用div HTML元素
{
grid: $(go.Panel, "Grid",
$(go.Shape, "LineH", {
stroke: "lightgray",
strokeWidth: 0.5
}),
$(go.Shape, "LineH", {
stroke: "gray",
strokeWidth: 0.5,
interval: 10
}),
$(go.Shape, "LineV", {
stroke: "lightgray",
strokeWidth: 0.5
}),
$(go.Shape, "LineV", {
stroke: "gray",
strokeWidth: 0.5,
interval: 10
})
),
allowDrop: true, // 必须是真的才能接受调色板中的液滴
"draggingTool.dragsLink": true,
"draggingTool.isGridSnapEnabled": true,
"linkingTool.isUnconnectedLinkValid": true,
"linkingTool.portGravity": 20,
"relinkingTool.isUnconnectedLinkValid": true,
"relinkingTool.portGravity": 20,
"relinkingTool.fromHandleArchetype": $(go.Shape, "Diamond", {
segmentIndex: 0,
cursor: "pointer",
desiredSize: new go.Size(8, 8),
fill: "tomato",
stroke: "darkred"
}),
"relinkingTool.toHandleArchetype": $(go.Shape, "Diamond", {
segmentIndex: -1,
cursor: "pointer",
desiredSize: new go.Size(8, 8),
fill: "darkred",
stroke: "tomato"
}),
"linkReshapingTool.handleArchetype": $(go.Shape, "Diamond", {
desiredSize: new go.Size(7, 7),
fill: "lightblue",
stroke: "deepskyblue"
}),
rotatingTool: $(TopRotatingTool), // 定义如下
"rotatingTool.snapAngleMultiple": 15,
"rotatingTool.snapAngleEpsilon": 15,
"undoManager.isEnabled": true
});
// 当文档被修改时，为标题添加一个“*”并启用“保存”按钮
myDiagram.addDiagramListener("Modified", function (e) {
var button = document.getElementById("SaveButton");
if (button) button.disabled = !myDiagram.isModified;
var idx = document.title.indexOf("*");
if (myDiagram.isModified) {
if (idx < 0) document.title += "*";
} else {
if (idx >= 0) document.title = document.title.substr(0, idx);
}
});
// 定义一个创建通常透明的“端口”的函数。
//“name”用作GraphObject.portId，“spot”用于控制链接的连接方式
// 以及端口在节点上的位置以及布尔型“输出”和“输入”参数
// 控制用户是否可以从端口或从端口获取链接。
function makePort(name, spot, output, input) {
// 港口基本上只是一个小透明的广场
return $(go.Shape, "Circle", {
fill: null, // 没有看到，默认情况下; 通过showSmallPorts设置为半透明灰色，如下定义
stroke: null,
desiredSize: new go.Size(7, 7),
alignment: spot, // 对齐主Shape中的端口
alignmentFocus: spot, // 只是在形状内
portId: name, // 声明这个对象是一个“端口”
fromSpot: spot,
toSpot: spot, // 声明链接可能在此端口连接的位置
fromLinkable: output,
toLinkable: input, // 声明用户是否可以在此处绘制链接
cursor: "pointer" // 显示不同的光标以指示潜在的链接点
});
}
var nodeSelectionAdornmentTemplate =
$(go.Adornment, "Auto",
$(go.Shape, {
fill: null,
stroke: "deepskyblue",
strokeWidth: 1.5,
strokeDashArray: [4, 2]
}),
$(go.Placeholder)
);
var nodeResizeAdornmentTemplate =
$(go.Adornment, "Spot", {
locationSpot: go.Spot.Right
},
$(go.Placeholder),
$(go.Shape, {
alignment: go.Spot.TopLeft,
cursor: "nw-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.Top,
cursor: "n-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.TopRight,
cursor: "ne-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.Left,
cursor: "w-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.Right,
cursor: "e-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.BottomLeft,
cursor: "se-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.Bottom,
cursor: "s-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
alignment: go.Spot.BottomRight,
cursor: "sw-resize",
desiredSize: new go.Size(6, 6),
fill: "lightblue",
stroke: "deepskyblue"
})
);
var nodeRotateAdornmentTemplate =
$(go.Adornment, {
locationSpot: go.Spot.Center,
locationObjectName: "CIRCLE"
},
$(go.Shape, "Circle", {
name: "CIRCLE",
cursor: "pointer",
desiredSize: new go.Size(7, 7),
fill: "lightblue",
stroke: "deepskyblue"
}),
$(go.Shape, {
geometryString: "M3.5 7 L3.5 30",
isGeometryPositioned: true,
stroke: "deepskyblue",
strokeWidth: 1.5,
strokeDashArray: [4, 2]
})
);
myDiagram.nodeTemplate =
$(go.Node, "Spot", {
locationSpot: go.Spot.Center
},
new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify), {
selectable: true,
selectionAdornmentTemplate: nodeSelectionAdornmentTemplate
}, {
resizable: true,
resizeObjectName: "PANEL",
resizeAdornmentTemplate: nodeResizeAdornmentTemplate
}, {
rotatable: true,
rotateAdornmentTemplate: nodeRotateAdornmentTemplate
},
new go.Binding("angle").makeTwoWay(),
//主要对象是围绕具有形状的TextBlock的面板
$(go.Panel, "Auto", {
name: "PANEL"
},
new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
$(go.Shape, "Rectangle", // 默认数字
{
portId: "", // 默认端口：如果链接数据没有位置，请使用最近端
fromLinkable: true,
toLinkable: true,
cursor: "pointer",
fill: "white", // default color
strokeWidth: 2
},
new go.Binding("figure"),
new go.Binding("fill")),
$(go.TextBlock, {
font: "bold 11pt Helvetica, Arial, sans-serif",
margin: 8,
maxSize: new go.Size(160, NaN),
wrap: go.TextBlock.WrapFit,
editable: true
},
new go.Binding("text").makeTwoWay())
),
// 四个小的有名港口，每边一个：
makePort("T", go.Spot.Top, false, true),
makePort("L", go.Spot.Left, true, true),
makePort("R", go.Spot.Right, true, true),
makePort("B", go.Spot.Bottom, true, false), { // 处理鼠标进入/离开事件以显示/隐藏端口
mouseEnter: function (e, node) {
showSmallPorts(node, true);
},
mouseLeave: function (e, node) {
showSmallPorts(node, false);
}
}
);
function showSmallPorts(node, show) {
node.ports.each(function (port) {
if (port.portId !== "") { // 不要更改默认端口，这是一个很大的形状
port.fill = show ? "rgba(0,0,0,.3)" : null;
}
});
}
var linkSelectionAdornmentTemplate =
$(go.Adornment, "Link",
$(go.Shape,
// isPanelMain声明这个Shape共享Link.geometry
{
isPanelMain: true,
fill: null,
stroke: "deepskyblue",
strokeWidth: 0
}) // 使用选择对象的strokeWidth
);
myDiagram.linkTemplate =
$(go.Link, // 整个链接面板
{
selectable: true,
selectionAdornmentTemplate: linkSelectionAdornmentTemplate
}, {
relinkableFrom: true,
relinkableTo: true,
reshapable: true
}, {
routing: go.Link.AvoidsNodes,
curve: go.Link.JumpOver,
corner: 5,
toShortLength: 4
},
new go.Binding("points").makeTwoWay(),
$(go.Shape, // the link path shape
{
isPanelMain: true,
strokeWidth: 2
}),
$(go.Shape, // the arrowhead
{
toArrow: "Standard",
stroke: null
}),
$(go.Panel, "Auto",
new go.Binding("visible", "isSelected").ofObject(),
$(go.Shape, "RoundedRectangle", // 链接形状
{
fill: "#F8F8F8",
stroke: null
}),
$(go.TextBlock, {
textAlign: "center",
font: "10pt helvetica, arial, sans-serif",
stroke: "#919191",
margin: 2,
minSize: new go.Size(10, NaN),
editable: true
},
new go.Binding("text").makeTwoWay())
)
);
load(); // 从一些JSON文本加载初始图
// 初始化页面左侧的Palette
myPalette =
$(go.Palette, "myPaletteDiv", // 必须命名或引用DIV HTML元素
{
maxSelectionCount: 1,
nodeTemplateMap: myDiagram.nodeTemplateMap, // 共享myDiagram使用的模板
linkTemplate: // 简化链接模板，就在这个调色板中
$(go.Link, { // 因为GridLayout.alignment是Location，并且节点具有locationSpot == Spot.Center，
// 以相同的方式排列链接，我们必须假装链接具有相同的位置点
locationSpot: go.Spot.Center,
selectionAdornmentTemplate: $(go.Adornment, "Link", {
locationSpot: go.Spot.Center
},
$(go.Shape, {
isPanelMain: true,
fill: null,
stroke: "deepskyblue",
strokeWidth: 0
}),
$(go.Shape, // the arrowhead
{
toArrow: "Standard",
stroke: null
})
)
}, {
routing: go.Link.AvoidsNodes,
curve: go.Link.JumpOver,
corner: 5,
toShortLength: 4
},
new go.Binding("points"),
$(go.Shape, // 链接路径形状
{
isPanelMain: true,
strokeWidth: 2
}),
$(go.Shape, // 箭头
{
toArrow: "Standard",
stroke: null
})
),
model: new go.GraphLinksModel([ // 指定调色板的内容
//{text: "模块内容", figure: "形状", fill: "颜色"},值可以接受变量
{
text: "接听",
figure: "RoundedRectangle"
},
{
text: "确认身份"
},
{
text: "还款提醒"
},
{
text: "应答",
figure: "Diamond"
},
{
text: "处理"
},
{
text: "挂机2",
figure: "RoundedRectangle"
}
], [
// 调色板也有一个断开的链接，用户可以拖放
{
points: new go.List(go.Point).addAll([new go.Point(0, 0), new go.Point(30, 0),
new go.Point(30, 40), new go.Point(60, 40)
])
}
])
});
}
function TopRotatingTool() {
go.RotatingTool.call(this);
}
go.Diagram.inherit(TopRotatingTool, go.RotatingTool);
/** @override */
TopRotatingTool.prototype.updateAdornments = function (part) {
go.RotatingTool.prototype.updateAdornments.call(this, part);
var adornment = part.findAdornment("Rotating");
if (adornment !== null) {
adornment.location = part.rotateObject.getDocumentPoint(new go.Spot(0.5, 0, 0, -30)); // 在中间顶部以上
}
};
/** @override */
TopRotatingTool.prototype.rotate = function (newangle) {
go.RotatingTool.prototype.rotate.call(this, newangle + 90);
};
// TopRotatingTool类的结尾
// 以JSON格式显示用户可编辑的图表模型
function save() {
saveDiagramProperties(); // 在写入JSON之前先执行此操作
document.getElementById("mySavedModel").value = myDiagram.model.toJson();
myDiagram.isModified = false;
}
function load() {
myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
loadDiagramProperties(); // 在Model.modelData被带入内存后执行此操作
}
function saveDiagramProperties() {
myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);
}
function loadDiagramProperties(e) {
// 设置Diagram.initialPosition而不是Diagram.position，以处理初始化副作用
var pos = myDiagram.model.modelData.position;
if (pos) myDiagram.initialPosition = go.Point.parse(pos);
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div style=" 100%; display: flex; justify-content: center">
<div id="myPaletteDiv" style=" 105px; margin-right: 2px; whitesmoke; border: solid 1px black"></div>
<div id="myDiagramDiv" style="flex-grow: 1; height: 620px; border: solid 1px black"></div>
</div>
<p>
此示例演示了用户像链接节点一样拖动链接的功能。当链接的任一端经过有效端口时，端口将突出显示。。
</p>
<p>
此示例演示了用户像链接节点一样拖动链接的功能。当链接的任一端经过有效端口时，端口将突出显示。。
</p>
<p>
通过设置部分或全部以下属性可启用链接拖动功能：
<a>DraggingTool.dragsLink</a>, <a>LinkingTool.isUnconnectedLinkValid</a>,and
<a>RelinkingTool.isUnconnectedLinkValid</a>.
</p>
<p>
请注意，Link中存在<a>Palette</a>这样它也可以拖出来并放到主图上。
因为当任何一端没有与节点连接时链路不会自动路由，所以在定义该组件选项时显式提供路由。
</p>
<p>
这也演示了几个习惯修饰：
<a>Part.selectionAdornmentTemplate</a>, <a>Part.resizeAdornmentTemplate</a>, and
<a>Part.rotateAdornmentTemplate</a>.
</p>
<p>
最后这个例子演示了保存和恢复<a>Diagram.position</a>作为财产<a>Model.modelData</a>调用时会自动保存并恢复的对象<a>Model.toJson</a>
和<a>Model.fromJson</a>.
</p>
<div>
<div>
<button id="SaveButton" onclick="save()">Save</button>
<button onclick="load()">Load</button>
以JSON格式保存的图表模型：
</div>
<textarea id="mySavedModel" style="100%;height:300px">
{ "class": "go.GraphLinksModel",
"linkFromPortIdProperty": "fromPort",
"linkToPortIdProperty": "toPort",
"nodeDataArray": [
],
"linkDataArray": [
]}
</textarea>
</div>
</div>
</body>
</html>