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轻量级流程图控件GoJS示例连载（一）：最小化

发布时间：2025/6/15 javascript 50 豆豆
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GoJS是一款功能强大，快速且轻量级的流程图控件，可帮助你在JavaScript 和 HTML5 Canvas程序中创建流程图，且极大地简化你的JavaScript / Canvas 程序。

小编为大家准备了一套完整的GoJS的示例，将以连载的形式展开，供大家学习和交流讨论。

这不是GoJS的真正最小化演示，因为我们确实指定了自定义Node模板，但它非常简单。如果单击链接，示例的完整来源如下所示。

此示例使用Node模板设置Diagram.nodeTemplate，该模板数据绑定文本字符串和形状的填充颜色。有关构建自己的模板和模型数据的概述，请参阅“入门教程”。

该Diagram.initialContentAlignment设置导致图表内容出现在图的视口的中心。

使用鼠标和常用键盘命令，你可以平移，选择，移动，复制，删除和撤消/重做。在触摸设备上，使用手指作为鼠标，并保持手指静止以显示上下文菜单。默认上下文菜单支持当时为所选对象启用的大多数标准命令。

有关更精细和更有说服力的样本，请参阅基本示例。有关从服务器加载JSON数据的示例，请参阅最小化JSON示例。有关从服务器加载XML数据的示例，请参阅最小化XML示例。

以下为在页面中查看此示例页面的源代码：

function init() {if (window.goSamples) goSamples(); // init for these samples -- you don't need to call thisvar $ = go.GraphObject.make; // for conciseness in defining templatesmyDiagram = $(go.Diagram, "myDiagramDiv", // create a Diagram for the DIV HTML element{initialContentAlignment: go.Spot.Center, // center the content"undoManager.isEnabled": true // enable undo & redo});// define a simple Node templatemyDiagram.nodeTemplate =$(go.Node, "Auto", // the Shape will go around the TextBlock$(go.Shape, "RoundedRectangle", { strokeWidth: 0, fill: "white" },// Shape.fill is bound to Node.data.colornew go.Binding("fill", "color")),$(go.TextBlock,{ margin: 8 }, // some room around the text// TextBlock.text is bound to Node.data.keynew go.Binding("text", "key")));// but use the default Link template, by not setting Diagram.linkTemplate// create the model data that will be represented by Nodes and LinksmyDiagram.model = new go.GraphLinksModel([{ key: "Alpha", color: "lightblue" },{ key: "Beta", color: "orange" },{ key: "Gamma", color: "lightgreen" },{ key: "Delta", color: "pink" }],[{ from: "Alpha", to: "Beta" },{ from: "Alpha", to: "Gamma" },{ from: "Beta", to: "Beta" },{ from: "Gamma", to: "Delta" },{ from: "Delta", to: "Alpha" }]);} <div id="sample" deep="0"><!-- The DIV for the Diagram needs an explicit size or else we won't see anything.This also adds a border to help see the edges of the viewport. --><div id="myDiagramDiv" style="border: solid 1px black; width:400px; height:400px"></div><p>This isn't a truly <i>minimal</i> demonstration of <b>GoJS</b>,because we do specify a custom Node template, but it's pretty simple.The whole source for the sample is shown below if you click on the link.</p><p>This sample sets the <a>Diagram.nodeTemplate</a>, with a <a>Node</a> template that data binds both the text string and the shape's fill color.For an overview of building your own templates and model data, see the <a href="../learn/index.html">Getting Started tutorial.</a></p><p>The <a>Diagram.initialContentAlignment</a> setting causes the diagram's contentsto appear in the center of the diagram's viewport.</p><p>Using the mouse and common keyboard commands, you can pan, select, move, copy, delete, and undo/redo.On touch devices, use your finger to act as the mouse, and hold your finger stationary to bring up a context menu.The default context menu supports most of the standard commands thatare enabled at that time for the selected object.</p><p>For a more elaborate and capable sample, see the <a href="basic.html">Basic</a> sample.For a sample that loads JSON data from the server,see the <a href="minimalJSON.html">Minimal JSON</a> sample.For a sample that loads XML data from the server,see the <a href="minimalXML.html">Minimal XML</a> sample.</p> </div>

以下为在GitHub上查看此示例页面的源代码：

<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Minimal GoJS Sample</title> <meta name="description" content="An almost minimal diagram using a very simple node template and the default link template." /> <!-- Copyright 1998-2018 by Northwoods Software Corporation. --> <meta charset="UTF-8"> <script src="../release/go.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 thisvar $ = go.GraphObject.make; // for conciseness in defining templatesmyDiagram = $(go.Diagram, "myDiagramDiv", // create a Diagram for the DIV HTML element{initialContentAlignment: go.Spot.Center, // center the content"undoManager.isEnabled": true // enable undo & redo});// define a simple Node templatemyDiagram.nodeTemplate =$(go.Node, "Auto", // the Shape will go around the TextBlock$(go.Shape, "RoundedRectangle", { strokeWidth: 0, fill: "white" },// Shape.fill is bound to Node.data.colornew go.Binding("fill", "color")),$(go.TextBlock,{ margin: 8 }, // some room around the text// TextBlock.text is bound to Node.data.keynew go.Binding("text", "key")));// but use the default Link template, by not setting Diagram.linkTemplate// create the model data that will be represented by Nodes and LinksmyDiagram.model = new go.GraphLinksModel([{ key: "Alpha", color: "lightblue" },{ key: "Beta", color: "orange" },{ key: "Gamma", color: "lightgreen" },{ key: "Delta", color: "pink" }],[{ from: "Alpha", to: "Beta" },{ from: "Alpha", to: "Gamma" },{ from: "Beta", to: "Beta" },{ from: "Gamma", to: "Delta" },{ from: "Delta", to: "Alpha" }]);} </script> </head> <body οnlοad="init()"> <div id="sample"><!-- The DIV for the Diagram needs an explicit size or else we won't see anything.This also adds a border to help see the edges of the viewport. --><div id="myDiagramDiv" style="border: solid 1px black; width:400px; height:400px"></div><p>This isn't a truly <i>minimal</i> demonstration of <b>GoJS</b>,because we do specify a custom Node template, but it's pretty simple.The whole source for the sample is shown below if you click on the link.</p><p>This sample sets the <a>Diagram.nodeTemplate</a>, with a <a>Node</a> template that data binds both the text string and the shape's fill color.For an overview of building your own templates and model data, see the <a href="../learn/index.html">Getting Started tutorial.</a></p><p>The <a>Diagram.initialContentAlignment</a> setting causes the diagram's contentsto appear in the center of the diagram's viewport.</p><p>Using the mouse and common keyboard commands, you can pan, select, move, copy, delete, and undo/redo.On touch devices, use your finger to act as the mouse, and hold your finger stationary to bring up a context menu.The default context menu supports most of the standard commands thatare enabled at that time for the selected object.</p><p>For a more elaborate and capable sample, see the <a href="basic.html">Basic</a> sample.For a sample that loads JSON data from the server,see the <a href="minimalJSON.html">Minimal JSON</a> sample.For a sample that loads XML data from the server,see the <a href="minimalXML.html">Minimal XML</a> sample.</p> </div> </body> </html>

想要查看在线操作示例，可以点击此处>>>>>

转载于:https://juejin.im/post/5bebb2576fb9a049ea388104

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