PathGradientBrush.MultiplyTransform 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

藉由在前面加上指定的 Matrix，將表示這個 PathGradientBrush 的局部幾何轉換的 Matrix 乘以指定的 Matrix。

多載

MultiplyTransform(Matrix)	使用筆刷轉換矩陣乘以其他矩陣的乘積來更新筆刷的轉換矩陣。
MultiplyTransform(Matrix, MatrixOrder)	使用筆刷轉換矩陣乘以其他矩陣的乘積來更新筆刷的轉換矩陣。

MultiplyTransform(Matrix)

來源:

PathGradientBrush.cs

使用筆刷轉換矩陣乘以其他矩陣的乘積來更新筆刷的轉換矩陣。

public:
 void MultiplyTransform(System::Drawing::Drawing2D::Matrix ^ matrix);

public void MultiplyTransform (System.Drawing.Drawing2D.Matrix matrix);

member this.MultiplyTransform : System.Drawing.Drawing2D.Matrix -> unit

Public Sub MultiplyTransform (matrix As Matrix)

參數

matrix

Matrix

Matrix，將乘以筆刷的目前轉換矩陣。

範例

如需範例，請參閱 MultiplyTransform。

MultiplyTransform(Matrix, MatrixOrder)

來源:

PathGradientBrush.cs

使用筆刷轉換矩陣乘以其他矩陣的乘積來更新筆刷的轉換矩陣。

public:
 void MultiplyTransform(System::Drawing::Drawing2D::Matrix ^ matrix, System::Drawing::Drawing2D::MatrixOrder order);

public void MultiplyTransform (System.Drawing.Drawing2D.Matrix matrix, System.Drawing.Drawing2D.MatrixOrder order);

member this.MultiplyTransform : System.Drawing.Drawing2D.Matrix * System.Drawing.Drawing2D.MatrixOrder -> unit

Public Sub MultiplyTransform (matrix As Matrix, order As MatrixOrder)

參數

matrix

Matrix

Matrix，將乘以筆刷的目前轉換矩陣。

order

MatrixOrder

MatrixOrder，指定兩個矩陣相乘所依據的順序。

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。 此程式碼會執行下列動作：

• 建立圖形路徑，並將矩形加入其中。

• PathGradientBrush在此範例中，從路徑點 (建立 ，這些點會形成矩形，但可能是任何圖形) 。

• 將中央色彩設定為紅色，並將周圍色彩設定為藍色。

• 在 PathGradientBrush 套用乘積轉換之前，先將 繪製到畫面。

• 建立矩陣，以旋轉筆刷 90 度，並在兩個軸中以 100 轉譯。

• 使用 MultiplyTransform 方法將此矩陣套用至筆刷。

• 將筆刷繪製到畫面。

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

      // Create a new matrix that rotates by 90 degrees, and
      // translates by 100 in each direction.
      Matrix^ myMatrix = gcnew Matrix( 0,1,-1,0,100,100 );

      // Apply the transform to the brush.
      myPGBrush->MultiplyTransform( myMatrix, MatrixOrder::Append );

      // Draw the brush to the screen again after applying the
      // transform.
      e->Graphics->FillRectangle( myPGBrush, 10, 10, 200, 300 );
   }

public void MultiplyTransformExample(PaintEventArgs e)
{
             
    // Create a graphics path and add an rectangle.
    GraphicsPath myPath = new GraphicsPath();
    Rectangle rect = new Rectangle(20, 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);
             
    // Create a new matrix that rotates by 90 degrees, and
    // translates by 100 in each direction.
    Matrix myMatrix = new Matrix(0, 1, -1, 0, 100, 100);
             
    // Apply the transform to the brush.
    myPGBrush.MultiplyTransform(myMatrix, MatrixOrder.Append);
             
    // Draw the brush to the screen again after applying the
    // transform.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 300);
}

Public Sub MultiplyTransformExample(ByVal e As PaintEventArgs)

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

    ' Create a new matrix that rotates by 90 degrees, and
    ' translates by 100 in each direction.
    Dim myMatrix As New Matrix(0, 1, -1, 0, 100, 100)

    ' Apply the transform to the brush.
    myPGBrush.MultiplyTransform(myMatrix, MatrixOrder.Append)

    ' Draw the brush to the screen again after applying the
    ' transform.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 300)
End Sub