Shape.PointToScreen (Método)

Artículo
11/02/2012

Calcula la ubicación del punto especificado de cliente en coordenadas de pantalla.

Espacio de nombres: Microsoft.VisualBasic.PowerPacks
Ensamblado: Microsoft.VisualBasic.PowerPacks.Vs (en Microsoft.VisualBasic.PowerPacks.Vs.dll)

Sintaxis

'Declaración
Public Function PointToScreen ( _
    position As Point _
) As Point

public Point PointToScreen(
    Point position
)

public:
Point PointToScreen(
    Point position
)

member PointToScreen : 
        position:Point -> Point

public function PointToScreen(
    position : Point
) : Point

Parámetros

position
Tipo: System.Drawing.Point

Valor devuelto

Tipo: System.Drawing.Point
Point que representa el Point convertido, p, en coordenadas de pantalla.

Ejemplos

El ejemplo siguiente se muestra cómo utilizar los métodos de PointToScreen y de RectangleToScreen para cambiar el color de RectangleShape cuando finaliza una operación de arrastre en el área cliente.Este ejemplo requiere tener un control de RectangleShape denominado RectangleShape1 en un formulario y que la propiedad de BackStyle está establecida en Opaque.

Public isDrag As Boolean = True
Public theRectangle As System.Drawing.Rectangle

Private Sub Form1_MouseMove(
    ByVal sender As Object, 
    ByVal e As System.Windows.Forms.MouseEventArgs
  ) Handles RectangleShape1.MouseMove

    ' If the mouse is being dragged, undraw and redraw the rectangle
    ' while the mouse moves.
    If (isDrag) Then

        ' Hide the previous rectangle by calling the
        ' DrawReversibleFrame method, using the same parameters.
        ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, 
          FrameStyle.Dashed)

        ' Calculate the endpoint and dimensions for the new rectangle, 
        ' again by using the PointToScreen method.
        Dim startPoint As Point = New Point(RectangleShape1.Width, 
         RectangleShape1.Height)
        Dim endPoint As Point = RectangleShape1.PointToScreen(New Point(e.X, e.Y))
        Dim width As Integer = endPoint.X - startPoint.X
        Dim height As Integer = endPoint.Y - startPoint.Y
        theRectangle = New Rectangle(startPoint.X, startPoint.Y, 
         width, height)

        ' Draw the new rectangle by calling DrawReversibleFrame again.  
        ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, 
          FrameStyle.Dashed)
    End If
End Sub

Private Sub Form1_MouseUp() Handles RectangleShape1.MouseUp

    ' If the MouseUp event occurs, the user is not dragging.
    isDrag = False
    ' Draw the rectangle to be evaluated. Set a dashed frame style 
    ' by using the FrameStyle enumeration.
    ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, 
      FrameStyle.Dashed)
    ' Find out which controls intersect the rectangle, and change
    ' their colors.
    ' The method uses the RectangleToScreen method to convert the 
    ' control's client coordinates to screen coordinates.
    Dim controlRectangle As Rectangle

    controlRectangle = RectangleShape1.RectangleToScreen(
       RectangleShape1.ClientRectangle)
    If controlRectangle.IntersectsWith(theRectangle) Then
        RectangleShape1.BackColor = Color.BurlyWood
    End If

    ' Reset the rectangle.
    theRectangle = New Rectangle(0, 0, 0, 0)
End Sub

public bool isDrag = true;
public System.Drawing.Rectangle theRectangle;

private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{

    // If the mouse is being dragged, undraw and redraw the rectangle
    // while the mouse moves.
    if (isDrag)

    // Hide the previous rectangle by calling the
    // DrawReversibleFrame method, using the same parameters.
    {
        ControlPaint.DrawReversibleFrame(theRectangle, this.BackColor, FrameStyle.Dashed);

        // Calculate the endpoint and dimensions for the new rectangle, 
        // again by using the PointToScreen method.
        Point startPoint = new Point(rectangleShape1.Width, rectangleShape1.Height);
        Point endPoint = rectangleShape1.PointToScreen(new Point(e.X, e.Y));
        int width = endPoint.X - startPoint.X;
        int height = endPoint.Y - startPoint.Y;
        theRectangle = new Rectangle(startPoint.X, startPoint.Y, width, height);

        // Draw the new rectangle by calling DrawReversibleFrame again.  
        ControlPaint.DrawReversibleFrame(theRectangle, this.BackColor, FrameStyle.Dashed);
    }
}

private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{

    // If the MouseUp event occurs, the user is not dragging.
    isDrag = false;
    // Draw the rectangle to be evaluated. Set a dashed frame style 
    // by using the FrameStyle enumeration.
    ControlPaint.DrawReversibleFrame(theRectangle, this.BackColor, FrameStyle.Dashed);
    // Find out which controls intersect the rectangle, and change
    // their colors.
    // The method uses the RectangleToScreen method to convert the 
    // control's client coordinates to screen coordinates.
    Rectangle controlRectangle;

    controlRectangle = rectangleShape1.RectangleToScreen(rectangleShape1.ClientRectangle);
    if (controlRectangle.IntersectsWith(theRectangle))
    {
        rectangleShape1.BackColor = Color.BurlyWood;
    }

    // Reset the rectangle.
    theRectangle = new Rectangle(0, 0, 0, 0);
}

Seguridad de .NET Framework

Plena confianza para el llamador inmediato. Un código de confianza parcial no puede utilizar este miembro. Para obtener más información, vea Utilizar bibliotecas de código que no es de plena confianza.