一、使用官方样式

样式（shapes）地址：http://gojs.net/latest/samples/shapes.html

使用方法：

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         myDiagram.nodeTemplateMap.add("End",
              $(go.Node, "Spot", nodeStyle(),
                $(go.Panel, "Auto",
                  $(go.Shape, "Circle", // 在此处设置样式
                    { minSize: new go.Size(40, 40), fill: "#DC3C00", stroke: null }),
                  $(go.TextBlock, "End",
                    { font: "bold 11pt Courier New,Microsoft Yahei", stroke: lightText },
                    new go.Binding("text"))
                ),
                makePort("T", go.Spot.Top, false, true),
                makePort("L", go.Spot.Left, false, true),
                makePort("R", go.Spot.Right, false, true)
              ));

二、自定义样式

通过Shape你可以构建一个几何图形，并且可以控制它的形状和轮廓颜色以及填充色等。

图形

你可以通过Shape.figure属性设置它的形状。让你使用GraphObject.make方法构建时，你可以将形状参数以字符串形式作为第二个参数。你可能还需要通过GraphObject.desiredSize、GraphObject.width、GraphObject.height属性设置Shape的尺寸大小。

下面的例子中列出了一些常用的Shape形状，并且你可以看到它们的名字：

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diagram.add(
$(go.Part, "Horizontal",
  $(go.Shape, "Rectangle",
              { width: 40, height: 60, margin: 4, fill: null }),
  $(go.Shape, "RoundedRectangle",
              { width: 40, height: 60, margin: 4, fill: null }),
  $(go.Shape, "Ellipse",
              { width: 40, height: 60, margin: 4, fill: null }),
  $(go.Shape, "Triangle",
              { width: 40, height: 60, margin: 4, fill: null }),
  $(go.Shape, "Diamond",
              { width: 40, height: 60, margin: 4, fill: null })
));

结果：

shape

填充色与轮廓

可以通过Shape.stroke属性设置Shape的轮廓线条颜色。通过Shape.strokeWidth设置轮廓线条的粗细度。通过Shape.fill属性设置填充颜色。

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diagram.add(
$(go.Part, "Horizontal",
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4
                }),  // default fill and stroke are "black"
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4,
                fill: "green" }),
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4,
                fill: "green", stroke: null }),
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4,
                fill: null, stroke: "green" }),
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4,
                fill: null, stroke: "green", strokeWidth: 3 }),
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4,
                fill: null, stroke: "green", strokeWidth: 6 }),
  $(go.Shape, { figure: "Club", width: 40, height: 40, margin: 4,
                fill: "green", background: "orange" })
));

结果：

shape

Shape.stroke和Shape.fill属性的值一般使用CSS设置，它们的默认颜色都是黑色。但是我们最常用的还是将它们设置为null或transparent，前者意思是空，后者是透明，在表象上，这两者是没有差距的，但是在点击行为上有区别。如果设置为null，那么只能点击图形的轮廓才能选中，点击图形里面是无法选中的。而如设置为transparent，点击图形的任何地方都可以选中该图形。

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diagram.add(
$(go.Part, "Table",
  $(go.Shape, { row: 0, column: 0, figure: "Club", width: 40, height: 40, margin: 4,
                fill: "green" }),
  $(go.TextBlock, "green", { row: 1, column: 0 }),
  $(go.Shape, { row: 0, column: 1, figure: "Club", width: 40, height: 40, margin: 4,
                fill: "white" }),
  $(go.TextBlock, "white", { row: 1, column: 1 }),
  $(go.Shape, { row: 0, column: 2, figure: "Club", width: 40, height: 40, margin: 4,
                fill: "transparent" }),
  $(go.TextBlock, "transparent", { row: 1, column: 2 }),
  $(go.Shape, { row: 0, column: 3, figure: "Club", width: 40, height: 40, margin: 4,
                fill: null }),
  $(go.TextBlock, "null", { row: 1, column: 3 })
));

结果：

shape

几何形状

形状其实就是若干个不同坐标的点，然后被线连起来形成的。上述的例子中，我们使用的都是gojs定义好的一些形成，然而gojs也支持用户自定义形状，可以使用Shape.geometry属性。可以通过Geometry.parse来创建一个几何图形，不过Geometry的表达式交为复杂，我们将在后期对其进行详细的介绍。

下面的例子中，我们展示了通过Geometry.parse方法创建自定义“W”几何图形的过程：

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var W_geometry = go.Geometry.parse("M 0,0 L 10,50 20,10 30,50 40,0", false);
diagram.add(
$(go.Part, "Horizontal",
  $(go.Shape, { geometry: W_geometry, strokeWidth: 2 }),
  $(go.Shape, { geometry: W_geometry, stroke: "blue", strokeWidth: 10,
                strokeJoin: "miter", strokeCap: "butt" }),
  $(go.Shape, { geometry: W_geometry, stroke: "blue", strokeWidth: 10,
                strokeJoin: "miter", strokeCap: "round" }),
  $(go.Shape, { geometry: W_geometry, stroke: "blue", strokeWidth: 10,
                strokeJoin: "miter", strokeCap: "square" }),
  $(go.Shape, { geometry: W_geometry, stroke: "green", strokeWidth: 10,
                strokeJoin: "bevel", strokeCap: "butt" }),
  $(go.Shape, { geometry: W_geometry, stroke: "green", strokeWidth: 10,
                strokeJoin: "bevel", strokeCap: "round" }),
  $(go.Shape, { geometry: W_geometry, stroke: "green", strokeWidth: 10,
                strokeJoin: "bevel", strokeCap: "square" }),
  $(go.Shape, { geometry: W_geometry, stroke: "red", strokeWidth: 10,
                strokeJoin: "round", strokeCap: "butt" }),
  $(go.Shape, { geometry: W_geometry, stroke: "red", strokeWidth: 10,
                strokeJoin: "round", strokeCap: "round" }),
  $(go.Shape, { geometry: W_geometry, stroke: "red", strokeWidth: 10,
                strokeJoin: "round", strokeCap: "square" }),
  $(go.Shape, { geometry: W_geometry, stroke: "purple", strokeWidth: 2,
                strokeDashArray: [4, 2] }),
  $(go.Shape, { geometry: W_geometry, stroke: "purple", strokeWidth: 2,
                strokeDashArray: [6, 6, 2, 2] })
));

结果：

shape

角度和比例

除了通过GraphObject.desiredSize，GraphObject.width，GraphObject.height这几个属性设置Shape的尺寸大小外，还可以使用GraphObject.angle和GraphObject.scale属性设置Shape的角度和比例。

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diagram.add(
$(go.Part, "Table",
  $(go.Shape, { row: 0, column: 1,
                figure: "Club", fill: "green", width: 40, height: 40,
                }),  // default angle is zero; default scale is one
  $(go.Shape, { row: 0, column: 2,
                figure: "Club", fill: "green", width: 40, height: 40,
                angle: 30 }),
  $(go.Shape, { row: 0, column: 3,
                figure: "Club", fill: "green", width: 40, height: 40,
                scale: 1.5 }),
  $(go.Shape, { row: 0, column: 4,
                figure: "Club", fill: "green", width: 40, height: 40,
                angle: 30, scale: 1.5 })
));

结果：

shape

下面的例子中，将Shape.fill的属性设置为Brush画笔对象，并使用了线性渐变画笔给Shape填充颜色。

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diagram.add(
$(go.Part, "Table",
  $(go.Shape, { row: 0, column: 0,
                figure: "Club", width: 40, height: 40, angle: 0, scale: 1.5,
                fill: $(go.Brush, go.Brush.Linear, { 0.0: "blue", 1.0: "red" }),
                background: $(go.Brush, go.Brush.Linear, { 0.0: "yellow", 1.0: "green" }),
                areaBackground: $(go.Brush, go.Brush.Linear, { 0.0: "gray", 1.0: "lightgray" }) }),
  $(go.Shape, { row: 0, column: 1, width: 10, fill: null, stroke: null }),
  $(go.Shape, { row: 0, column: 2,
                figure: "Club", width: 40, height: 40, angle: 45, scale: 1.5,
                fill: $(go.Brush, go.Brush.Linear, { 0.0: "blue", 1.0: "red" }),
                background: $(go.Brush, go.Brush.Linear, { 0.0: "yellow", 1.0: "green" }),
                areaBackground: $(go.Brush, go.Brush.Linear, { 0.0: "black", 1.0: "lightgray" }) })
));

结果：

shape