LinearGradientBrush.RotateTransform 方法

定義

命名空間:

System.Drawing.Drawing2D

組件:

System.Drawing.Common.dll

套件:

System.Drawing.Common v8.0.0

根據指定的數量來旋轉局部幾何轉換。 這個方法會預先規劃轉換的旋轉。

多載

RotateTransform(Single)	根據指定的數量來旋轉局部幾何轉換。 這個方法會預先規劃轉換的旋轉。
RotateTransform(Single, MatrixOrder)	依照指定的順序，根據指定的數量來旋轉局部幾何轉換。

RotateTransform(Single)

來源:

LinearGradientBrush.cs

根據指定的數量來旋轉局部幾何轉換。 這個方法會預先規劃轉換的旋轉。

public:
 void RotateTransform(float angle);

public void RotateTransform (float angle);

member this.RotateTransform : single -> unit

Public Sub RotateTransform (angle As Single)

參數

angle

Single

旋轉的角度。

範例

如需範例，請參閱 RotateTransform。

RotateTransform(Single, MatrixOrder)

來源:

LinearGradientBrush.cs

依照指定的順序，根據指定的數量來旋轉局部幾何轉換。

public:
 void RotateTransform(float angle, System::Drawing::Drawing2D::MatrixOrder order);

public void RotateTransform (float angle, System.Drawing.Drawing2D.MatrixOrder order);

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

Public Sub RotateTransform (angle As Single, order As MatrixOrder)

參數

angle

Single

旋轉的角度。

order

MatrixOrder

MatrixOrder，指定要在之後或之前附加旋轉矩陣。

範例

下列程式代碼範例是設計來搭配 Windows Forms 使用，而且需要 PaintEventArgse事件OnPaint物件。 代碼

• 建立新的 LinearGradientBrush。

• 使用此筆刷將省略號繪製到螢幕。

• LinearGradientBrush藉由呼叫 RotateTransform 方法旋轉 45 度。

• 使用旋轉的筆刷，將橢圓形繪製到畫面正下方的第一個橢圓形。

請注意，下角橢圓形的漸層在頂端橢圓形的 X 軸的 45 度角度。 另請注意，方法的呼叫 TranslateTransform 是用來對齊漸層填滿左邊緣與下角橢圓形的左邊緣。

private:
   void RotateTransformExample( PaintEventArgs^ e )
   {
      // Create a LinearGradientBrush.
      Rectangle myRect = Rectangle(20,20,200,100);
      LinearGradientBrush^ myLGBrush = gcnew LinearGradientBrush( myRect,Color::Blue,Color::Red,0.0f,true );

      // Draw an ellipse to the screen using the LinearGradientBrush.
      e->Graphics->FillEllipse( myLGBrush, myRect );

      // Rotate the LinearGradientBrush.
      myLGBrush->RotateTransform( 45.0f, MatrixOrder::Prepend );

      // Rejustify the brush to start at the left edge of the ellipse.
      myLGBrush->TranslateTransform(  -100.0f, 0.0f );

      // Draw a second ellipse to the screen using
      // the transformed brush.
      e->Graphics->FillEllipse( myLGBrush, 20, 150, 200, 100 );
   }

 private void RotateTransformExample(PaintEventArgs e)
 {
              
     // Create a LinearGradientBrush.
     Rectangle myRect = new Rectangle(20, 20, 200, 100);
     LinearGradientBrush myLGBrush = new LinearGradientBrush(
         myRect, Color.Blue, Color.Red,  0.0f, true);
              
     // Draw an ellipse to the screen using the LinearGradientBrush.
     e.Graphics.FillEllipse(myLGBrush, myRect);
              
     // Rotate the LinearGradientBrush.
     myLGBrush.RotateTransform(45.0f, MatrixOrder.Prepend);

     // Rejustify the brush to start at the left edge of the ellipse.
     myLGBrush.TranslateTransform(-100.0f, 0.0f);
              
     // Draw a second ellipse to the screen using
     // the transformed brush.
     e.Graphics.FillEllipse(myLGBrush, 20, 150, 200, 100);
 }

Public Sub RotateTransformExample(ByVal e As PaintEventArgs)

    ' Create a LinearGradientBrush.
    Dim myRect As New Rectangle(20, 20, 200, 100)
    Dim myLGBrush As New LinearGradientBrush(myRect, Color.Blue, _
    Color.Red, 0.0F, True)

    ' Draw an ellipse to the screen using the LinearGradientBrush.
    e.Graphics.FillEllipse(myLGBrush, myRect)

    ' Rotate the LinearGradientBrush.
    myLGBrush.RotateTransform(45.0F, MatrixOrder.Prepend)

    ' Rejustify the brush to start at the left edge of the ellipse.
    myLGBrush.TranslateTransform(-100.0F, 0.0F)

    ' Draw a second ellipse to the screen using the transformed brush.
    e.Graphics.FillEllipse(myLGBrush, 20, 150, 200, 100)
End Sub