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Original

Método Control.RectangleToScreen

Calcula o tamanho e o local do retângulo especificado de cliente na tela coordena.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (em System.Windows.Forms.dll)

public Rectangle RectangleToScreen(
	Rectangle r
)

Parâmetros

r
Tipo: System.Drawing.Rectangle
A coordenada Rectangle de cliente a conversão.

Valor de retorno

Tipo: System.Drawing.Rectangle
Rectangle que representa Rectangleconvertido, p, na tela coordena.

O exemplo de código demonstra como usar BackColor, RectangleToScreen, PointToScreen, MouseButtons, o ControlPaint.DrawReversibleFrame, e membros de Rectangle.IntersectsWith . Para executar o exemplo, cole o seguinte código em um formulário denominado Form1 que contém vários controles. Esse exemplo requer que MouseDown, MouseMove, e eventos de MouseUp estão conectados aos manipuladores de eventos definidos no exemplo.


    // The following three methods will draw a rectangle and allow 
    // the user to use the mouse to resize the rectangle.  If the 
    // rectangle intersects a control's client rectangle, the 
    // control's color will change.

    bool isDrag = false;
    Rectangle theRectangle = new Rectangle
		(new Point(0, 0), new Size(0, 0));
    Point startPoint;

    private void Form1_MouseDown(object sender, 
		System.Windows.Forms.MouseEventArgs e)
    {

        // Set the isDrag variable to true and get the starting point 
        // by using the PointToScreen method to convert form 
		// coordinates to screen coordinates.
        if (e.Button==MouseButtons.Left)
        {
            isDrag = true;
        }

        Control control = (Control) sender;

        // Calculate the startPoint by using the PointToScreen 
        // method.
        startPoint = control.PointToScreen(new Point(e.X, e.Y));
    }

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

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

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

            // Calculate the endpoint and dimensions for the new 
	        // rectangle, again using the PointToScreen method.
            Point endPoint = ((Control) sender).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 
        // using the FrameStyle enumeration.
        ControlPaint.DrawReversibleFrame(theRectangle, 
			this.BackColor, FrameStyle.Dashed);

        // Find out which controls intersect the rectangle and 
        // change their color. The method uses the RectangleToScreen  
        // method to convert the Control's client coordinates 
		// to screen coordinates.
	    Rectangle controlRectangle;
        for(int i = 0; i < Controls.Count; i++)
        {
            controlRectangle = Controls[i].RectangleToScreen
				(Controls[i].ClientRectangle);
            if (controlRectangle.IntersectsWith(theRectangle))
            {
                Controls[i].BackColor = Color.BurlyWood;
            }
        }

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


.NET Framework

Com suporte em: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Com suporte em: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Função Server Core sem suporte), Windows Server 2008 R2 (Função Server Core com suporte com o SP1 ou posterior, Itanium sem suporte)

O .NET Framework não oferece suporte a todas as versões de cada plataforma. Para obter uma lista das versões com suporte, consulte Requisitos do sistema do .NET Framework.

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