PathGradientBrush.MultiplyTransform Method

Definition

Namespace:

System.Drawing.Drawing2D

Assembly:

System.Drawing.Common.dll

Multiplies the Matrix that represents the local geometric transform of this PathGradientBrush by the specified Matrix by prepending the specified Matrix.

Overloads

MultiplyTransform(Matrix, MatrixOrder)	Updates the brush's transformation matrix with the product of the brush's transformation matrix multiplied by another matrix.
MultiplyTransform(Matrix)	Updates the brush's transformation matrix with the product of brush's transformation matrix multiplied by another matrix.

MultiplyTransform(Matrix, MatrixOrder)

Updates the brush's transformation matrix with the product of the brush's transformation matrix multiplied by another matrix.

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)

Parameters

matrix

Matrix

The Matrix that will be multiplied by the brush's current transformation matrix.

order

MatrixOrder

A MatrixOrder that specifies in which order to multiply the two matrices.

Examples

The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, an OnPaint event object. The code performs the following actions:

• Creates a graphics path and adds a rectangle to it.

• Creates a PathGradientBrush from the path points (in this example, the points form a rectangle, but it could be most any shape).

• Sets the center color to red and the surrounding color to blue.

• Draws the PathGradientBrush to the screen prior to applying the multiply transform.

• Creates s matrix that rotates the brush 90 degrees and translates it by 100 in both axes.

• Applies this matrix to the brush by using the MultiplyTransform method.

• Draws the brush to the screen.

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

MultiplyTransform(Matrix)

Updates the brush's transformation matrix with the product of brush's transformation matrix multiplied by another matrix.

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)

Parameters

matrix

Matrix

The Matrix that will be multiplied by the brush's current transformation matrix.

Examples

For an example, see MultiplyTransform.