PathGradientBrush.ScaleTransform 方法

定义

命名空间:

System.Drawing.Drawing2D

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

将局部几何转换缩放指定的量。 此方法预先计算转换的缩放矩阵。

重载

ScaleTransform(Single, Single)	将局部几何转换缩放指定的量。 此方法预先计算转换的缩放矩阵。
ScaleTransform(Single, Single, MatrixOrder)	将局部几何转换以指定顺序缩放指定的量。

ScaleTransform(Single, Single)

Source:

PathGradientBrush.cs

将局部几何转换缩放指定的量。 此方法预先计算转换的缩放矩阵。

public:
 void ScaleTransform(float sx, float sy);

public void ScaleTransform (float sx, float sy);

member this.ScaleTransform : single * single -> unit

Public Sub ScaleTransform (sx As Single, sy As Single)

参数

sx

Single

X 轴方向上的变换比例因子。

sy

Single

Y 轴方向上的变换比例因子。

示例

有关示例，请参见 ScaleTransform。

ScaleTransform(Single, Single, MatrixOrder)

Source:

PathGradientBrush.cs

将局部几何转换以指定顺序缩放指定的量。

public:
 void ScaleTransform(float sx, float sy, System::Drawing::Drawing2D::MatrixOrder order);

public void ScaleTransform (float sx, float sy, System.Drawing.Drawing2D.MatrixOrder order);

member this.ScaleTransform : single * single * System.Drawing.Drawing2D.MatrixOrder -> unit

Public Sub ScaleTransform (sx As Single, sy As Single, order As MatrixOrder)

参数

sx

Single

X 轴方向上的变换比例因子。

sy

Single

Y 轴方向上的变换比例因子。

order

MatrixOrder

一个 MatrixOrder，指定是在后面追加缩放矩阵还是在前面添加缩放矩阵。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse事件OnPaint对象。 代码

• 创建图形路径并向其中添加一个矩形。

• PathGradientBrush在此示例中，从路径点 (创建 ，这些点构成一个矩形，但它可以是大多数) 的任何形状。

• 将中心颜色设置为红色，将周围颜色设置为蓝色。

• PathGradientBrush在应用缩放转换之前，将 绘制到屏幕。

• 使用 ScaleTransform 画笔的 方法将缩放转换应用到画笔。

• TranslateTransform调用 方法来移动画笔矩形，使其不会覆盖之前绘制到屏幕的矩形。

• 在屏幕上绘制已转换的画笔矩形。

请注意，x 轴中底部矩形的长度是平移前绘制的矩形的两倍。

public:
   void ScaleTransformExample( 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 transformation.
      e->Graphics->FillRectangle( myPGBrush, 10, 10, 200, 200 );

      // Scale by a factor of 2 in the x-axis by applying the scale
      // transform to the brush.
      myPGBrush->ScaleTransform( 2, 1, MatrixOrder::Append );

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

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

public void ScaleTransformExample(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 transformation.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 200);
             
    // Scale by a factor of 2 in the x-axis by applying the scale
    // transform to the brush.
    myPGBrush.ScaleTransform(2, 1, MatrixOrder.Append);
             
    // Move the brush down by 100 by Applying the translate
    // transform to the brush.
    myPGBrush.TranslateTransform(-100, 100, MatrixOrder.Append);
             
    // Draw the brush to the screen again after applying the
    // transforms.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 300, 300);
}

Public Sub ScaleTransformExample(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 transformation.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 200)

    ' Scale by a factor of 2 in the x-axis by applying the scale
    ' transform to the brush.
    myPGBrush.ScaleTransform(2, 1, MatrixOrder.Append)

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

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