LinearGradientBrush.ResetTransform Método

Definição

Namespace:

System.Drawing.Drawing2D

Assembly:

System.Drawing.Common.dll

Pacote:

System.Drawing.Common v9.0.0-preview.6.24327.6

Origem:

LinearGradientBrush.cs

Redefine a propriedade Transform para identidade.

public:
 void ResetTransform();

public void ResetTransform ();

member this.ResetTransform : unit -> unit

Public Sub ResetTransform ()

Exemplos

O exemplo de código a seguir foi projetado para uso com o Windows Forms e requer PaintEventArgse, um objeto de evento OnPaint. O código executa as seguintes ações:

• Cria um novo LinearGradientBrush.

• Desenha uma elipse na tela usando esse pincel.

• Chama o método MultiplyTransform para transformar o LinearGradientBrush.

• Desenha uma elipse para a tela diretamente abaixo da primeira elipse, usando o pincel transformado.

• Redefine a transformação.

• Desenha uma terceira elipse na tela abaixo das duas primeiras.

Observe que a elipse mais baixa é desenhada do mesmo tamanho que a primeira e que, devido à chamada ao método ResetTransform, o gradiente foi reduzido para corresponder.

private:
   void ResetTransformExample( 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 );

      // Transform the LinearGradientBrush.
      array<Point>^ transformArray = {Point(20,150),Point(400,150),Point(20,200)};
      Matrix^ myMatrix = gcnew Matrix( myRect,transformArray );
      myLGBrush->MultiplyTransform( myMatrix, MatrixOrder::Prepend );

      // Draw a second ellipse to the screen
      // using the transformed brush.
      e->Graphics->FillEllipse( myLGBrush, 20, 150, 380, 50 );

      // Reset the brush transform.
      myLGBrush->ResetTransform();

      // Draw a third ellipse to the screen using the reset brush.
      e->Graphics->FillEllipse( myLGBrush, 20, 250, 200, 100 );
   }

private void ResetTransformExample(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);
             
    // Transform the LinearGradientBrush.
    Point[] transformArray = { new Point(20, 150),
         new Point(400,150), new Point(20, 200) };
       
    Matrix myMatrix = new Matrix(myRect, transformArray);
    myLGBrush.MultiplyTransform( myMatrix, MatrixOrder.Prepend);
             
    // Draw a second ellipse to the screen
    // using the transformed brush.
    e.Graphics.FillEllipse(myLGBrush, 20, 150, 380, 50);
             
    // Reset the brush transform.
    myLGBrush.ResetTransform();
             
    // Draw a third ellipse to the screen using the reset brush.
    e.Graphics.FillEllipse(myLGBrush, 20, 250, 200, 100);
}

Public Sub ResetTransformExample(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)

    ' Transform the LinearGradientBrush.
    Dim transformArray As Point() = {New Point(20, 150), _
    New Point(400, 150), New Point(20, 200)}
    Dim myMatrix As New Matrix(myRect, transformArray)
    myLGBrush.MultiplyTransform(myMatrix, MatrixOrder.Prepend)

    ' Draw a second ellipse to the screen using the transformed brush.
    e.Graphics.FillEllipse(myLGBrush, 20, 150, 380, 50)

    ' Reset the brush transform.
    myLGBrush.ResetTransform()

    ' Draw a third ellipse to the screen using the reset brush.
    e.Graphics.FillEllipse(myLGBrush, 20, 250, 200, 100)
End Sub