ControlPaint.FillReversibleRectangle(Rectangle, Color) Método

Definição

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Desenha um retângulo preenchido e reversível na tela.

public:
 static void FillReversibleRectangle(System::Drawing::Rectangle rectangle, System::Drawing::Color backColor);

public static void FillReversibleRectangle (System.Drawing.Rectangle rectangle, System.Drawing.Color backColor);

static member FillReversibleRectangle : System.Drawing.Rectangle * System.Drawing.Color -> unit

Public Shared Sub FillReversibleRectangle (rectangle As Rectangle, backColor As Color)

Parâmetros

rectangle

Rectangle

O Rectangle que representa as dimensões do retângulo a serem preenchidas, nas coordenadas da tela.

backColor

Color

A Color da tela de fundo atrás do preenchimento.

Exemplos

O exemplo de código a seguir demonstra o uso do FillReversibleRectangle método . Para executar o exemplo, cole o código a seguir em um formulário. Adicione um botão chamado Button2 ao formulário e verifique se todos os eventos estão conectados aos manipuladores de eventos.

//When the mouse hovers over Button2, its ClientRectangle is filled.
void Button2_MouseHover( Object^ sender, System::EventArgs^ /*e*/ )
{
   Control^ senderControl = dynamic_cast<Control^>(sender);
   Rectangle screenRectangle = senderControl->RectangleToScreen( senderControl->ClientRectangle );
   ControlPaint::FillReversibleRectangle( screenRectangle, senderControl->BackColor );
}

// When the mouse leaves Button2, its ClientRectangle is cleared by
// calling the FillReversibleRectangle method again.
void Button2_MouseLeave( Object^ sender, System::EventArgs^ /*e*/ )
{
   Control^ senderControl = dynamic_cast<Control^>(sender);
   Rectangle screenRectangle = senderControl->RectangleToScreen( senderControl->ClientRectangle );
   ControlPaint::FillReversibleRectangle( screenRectangle, senderControl->BackColor );
}

//When the mouse hovers over Button2, its ClientRectangle is filled.
private void Button2_MouseHover(object sender, System.EventArgs e)
{
    Control senderControl = (Control) sender;
    Rectangle screenRectangle = senderControl.RectangleToScreen(
        senderControl.ClientRectangle);
    ControlPaint.FillReversibleRectangle(screenRectangle, 
        senderControl.BackColor);
}

// When the mouse leaves Button2, its ClientRectangle is cleared by
// calling the FillReversibleRectangle method again.
private void Button2_MouseLeave(object sender, System.EventArgs e)
{
    Control senderControl = (Control) sender;
    Rectangle screenRectangle = senderControl.RectangleToScreen(
        senderControl.ClientRectangle);
    ControlPaint.FillReversibleRectangle(screenRectangle, 
        senderControl.BackColor);
}

' When the mouse hovers over Button2, its ClientRectangle is filled.
Private Sub Button2_MouseHover(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles Button2.MouseHover

    Dim senderControl As Control = CType(sender, Control)
    Dim screenRectangle As Rectangle = _
        senderControl.RectangleToScreen(senderControl.ClientRectangle)
    ControlPaint.FillReversibleRectangle(screenRectangle, _
        senderControl.BackColor)
End Sub


' When the mouse leaves Button2, its ClientRectangle is cleared by
' calling the FillReversibleRectangle method again.
Private Sub Button2_MouseLeave(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles Button2.MouseLeave

    Dim senderControl As Control = CType(sender, Control)
    Dim screenRectangle As Rectangle = _
        senderControl.RectangleToScreen(senderControl.ClientRectangle)
    ControlPaint.FillReversibleRectangle(screenRectangle, _
        senderControl.BackColor)
End Sub

Comentários

O backColor parâmetro é usado para calcular a cor de preenchimento do retângulo para que ele fique sempre visível na tela de fundo.

Os resultados desse método podem ser revertidos desenhando o mesmo retângulo novamente. Desenhar um retângulo usando esse método é semelhante a inverter uma região da tela, exceto que ele fornece melhor desempenho para uma variedade maior de cores.

Confira também

• BackColor