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輕量級流程圖控件GoJS示例連載（一）：最小化

翻譯|使用教程|編輯：黃竹雯|2018-11-14 13:15:01.000|閱讀 463 次

概述：小編為大家準備了一套完整的GoJS的示例，將以連載的形式展開，供大家學習和交流討論。

# 界面/圖表報表/文檔/IDE等千款熱門軟控件火熱銷售中 >>

相關鏈接：

GoJS是一款功能強大，快速且輕量級的流程圖控件，可幫助你在JavaScript 和 HTML5 Canvas程序中創建流程圖，且極大地簡化你的JavaScript / Canvas 程序。

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小編為大家準備了一套完整的GoJS的示例，將以連載的形式展開，供大家學習和交流討論。

GoJS示例連載1

這不是GoJS的真正最小化演示，因為我們確實指定了自定義Node模板，但它非常簡單。如果單擊鏈接，示例的完整來源如下所示。

此示例使用Node模板設置Diagram.nodeTemplate，該模板數據綁定文本字符串和形狀的填充顏色。有關構建自己的模板和模型數據的概述，請參閱“入門教程”。

該Diagram.initialContentAlignment設置導致圖表內容出現在圖的視口的中心。

使用鼠標和常用鍵盤命令，你可以平移，選擇，移動，復制，刪除和撤消/重做。在觸摸設備上，使用手指作為鼠標，并保持手指靜止以顯示上下文菜單。默認上下文菜單支持當時為所選對象啟用的大多數標準命令。

有關更精細和更有說服力的樣本，請參閱基本示例。有關從服務器加載JSON數據的示例，請參閱最小化JSON示例。有關從服務器加載XML數據的示例，請參閱最小化XML示例。

以下為在頁面中查看此示例頁面的源代碼：


  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",  // 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 template
    myDiagram.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.color
          new go.Binding("fill", "color")),
        $(go.TextBlock,
          { margin: 8 },  // some room around the text
          // TextBlock.text is bound to Node.data.key
          new 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 Links
    myDiagram.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 contents
    to 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 that
    are 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>

以下為在GitHub上查看此示例頁面的源代碼：

<!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 this
    var $ = go.GraphObject.make;  // for conciseness in defining templates
    myDiagram = $(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 template
    myDiagram.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.color
          new go.Binding("fill", "color")),
        $(go.TextBlock,
          { margin: 8 },  // some room around the text
          // TextBlock.text is bound to Node.data.key
          new 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 Links
    myDiagram.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 onload="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 contents
    to 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 that
    are 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>

想要查看在線操作示例，可以點擊此處

標簽：流程圖

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