PathGradientBrush.SetBlendTriangularShape 方法

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

public:
 void SetBlendTriangularShape(float focus);

public void SetBlendTriangularShape (float focus);

member this.SetBlendTriangularShape : single -> unit

Public Sub SetBlendTriangularShape (focus As Single)

参数

示例

有关示例，请参阅 SetBlendTriangularShape.

注解

如果 SurroundColors 数组中有多个颜色，则数组中的第一种颜色用于结束颜色。 此数组中指定的颜色用于画笔边界路径上的离散点。

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

Source:

PathGradientBrush.cs

public:
 void SetBlendTriangularShape(float focus, float scale);

public void SetBlendTriangularShape (float focus, float scale);

member this.SetBlendTriangularShape : single * single -> unit

Public Sub SetBlendTriangularShape (focus As Single, scale As Single)

参数

示例

下面的代码示例旨在与 Windows 窗体一起使用，它需要 PaintEventArgseOnPaint 事件对象。 该代码执行以下操作：

• 创建图形路径并为其添加一个矩形。

• 从路径点创建 PathGradientBrush（在此示例中，这些点构成矩形，但它可以是大多数形状）。

• 将中心颜色设置为红色，将周围颜色设置为蓝色。

• 在应用混合转换之前，将 PathGradientBrush 绘制到屏幕。

• 使用其 SetBlendTriangularShape 方法将混合转换应用于画笔。

• 调用 TranslateTransform 方法移动画笔矩形，使其不会覆盖前面绘制到屏幕的画笔矩形。

• 绘制已转换的画笔矩形将绘制到屏幕。

请注意，最大中心颜色（红色）位于路径中心到路径边界的一半处。

public:
   void SetBlendTriangularShapeExample( PaintEventArgs^ e )
   {
      // Create a graphics path and add a rectangle.
      GraphicsPath^ myPath = gcnew GraphicsPath;
      Rectangle rect = Rectangle(100,20,100,50);
      myPath->AddRectangle( rect );

      // Get the path's array of points.
      array<PointF>^myPathPointArray = myPath->PathPoints;

      // Create a path gradient brush.
      PathGradientBrush^ myPGBrush = gcnew PathGradientBrush( myPathPointArray );

      // Set the color span.
      myPGBrush->CenterColor = Color::Red;
      array<Color>^ mySurroundColor = {Color::Blue};
      myPGBrush->SurroundColors = mySurroundColor;

      // Draw the brush to the screen prior to the blend.
      e->Graphics->FillRectangle( myPGBrush, 10, 10, 200, 200 );

      // Set the Blend factors.
      myPGBrush->SetBlendTriangularShape( 0.5f, 1.0f );

      // Move the brush down by 100 by Applying the translate
      // transform to the brush.
      myPGBrush->TranslateTransform( 0, 100, MatrixOrder::Append );

      // Draw the brush to the screen again after applying the
      // transforms.
      e->Graphics->FillRectangle( myPGBrush, 10, 10, 300, 300 );
   }

public void SetBlendTriangularShapeExample(PaintEventArgs e)
{
             
    // Create a graphics path and add a rectangle.
    GraphicsPath myPath = new GraphicsPath();
    Rectangle rect = new Rectangle(100, 20, 100, 50);
    myPath.AddRectangle(rect);
             
    // Get the path's array of points.
    PointF[] myPathPointArray = myPath.PathPoints;
             
    // Create a path gradient brush.
    PathGradientBrush myPGBrush = new
        PathGradientBrush(myPathPointArray);
             
    // Set the color span.
    myPGBrush.CenterColor = Color.Red;
    Color[] mySurroundColor = {Color.Blue};
    myPGBrush.SurroundColors = mySurroundColor;
             
    // Draw the brush to the screen prior to the blend.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 200);
             
    // Set the Blend factors.
    myPGBrush.SetBlendTriangularShape(0.5f, 1.0f);
             
    // Move the brush down by 100 by Applying the translate
    // transform to the brush.
    myPGBrush.TranslateTransform(0, 100, MatrixOrder.Append);
             
    // Draw the brush to the screen again after applying the
    // transforms.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 300, 300);
}

Public Sub SetBlendTriangularShapeExample(ByVal e As PaintEventArgs)

    ' Create a graphics path and add a rectangle.
    Dim myPath As New GraphicsPath
    Dim rect As New Rectangle(100, 20, 100, 50)
    myPath.AddRectangle(rect)

    ' Get the path's array of points.
    Dim myPathPointArray As PointF() = myPath.PathPoints

    ' Create a path gradient brush.
    Dim myPGBrush As New PathGradientBrush(myPathPointArray)

    ' Set the color span.
    myPGBrush.CenterColor = Color.Red
    Dim mySurroundColor As Color() = {Color.Blue}
    myPGBrush.SurroundColors = mySurroundColor

    ' Draw the brush to the screen prior to blend.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 200)

    ' Set the Blend factors.
    myPGBrush.SetBlendTriangularShape(0.5F, 1.0F)

    ' Move the brush down by 100 by Applying the translate
    ' transform to the brush.
    myPGBrush.TranslateTransform(0, 100, MatrixOrder.Append)

    ' Draw the brush to the screen again after applying the
    ' transforms.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 300, 300)
End Sub

注解

如果 SurroundColors 数组中有多个颜色，则数组中的第一种颜色用于结束颜色。 此数组中指定的颜色是用于画笔边界路径上离散点的颜色。

默认情况下，当从路径渐变的边界移动到中心点时，颜色会逐渐从边界颜色更改为中心颜色。 可以通过调用此方法来自定义边界和中心颜色的定位和混合。