Control.Region Control.Region Control.Region Control.Region Property

Определение

Возвращает или задает область окна, связанную с элементом управления.Gets or sets the window region associated with the control.

public:
 property System::Drawing::Region ^ Region { System::Drawing::Region ^ get(); void set(System::Drawing::Region ^ value); };
[System.ComponentModel.Browsable(false)]
public System.Drawing.Region Region { get; set; }
member this.Region : System.Drawing.Region with get, set
Public Property Region As Region

Значение свойства

Объект Region окна, сопоставленный с элементом управления.The window Region associated with the control.

Примеры

В следующем примере кода демонстрируется использование Region свойство путем создания круглая кнопка.The following code example demonstrates how to use the Region property by creating a round button. Чтобы запустить пример, вставьте следующий код в форму, содержащую кнопка с именем roundButton.To run the example, paste the following code in a form containing a button called roundButton. В этом примере требуется, Paint событие подключено к обработчику событий, определенный в примере.This example requires that the Paint event is connected to the event handler defined in the example.

private:
   // This method will change the square button to a circular button by 
   // creating a new circle-shaped GraphicsPath object and setting it 
   // to the RoundButton objects region.
   void roundButton_Paint( Object^ sender,
      System::Windows::Forms::PaintEventArgs^ e )
   {
      System::Drawing::Drawing2D::GraphicsPath^ buttonPath =
         gcnew System::Drawing::Drawing2D::GraphicsPath;
      
      // Set a new rectangle to the same size as the button's 
      // ClientRectangle property.
      System::Drawing::Rectangle newRectangle = roundButton->ClientRectangle;
      
      // Decrease the size of the rectangle.
      newRectangle.Inflate(  -10, -10 );
      
      // Draw the button's border.
      e->Graphics->DrawEllipse( System::Drawing::Pens::Black, newRectangle );
      
      // Increase the size of the rectangle to include the border.
      newRectangle.Inflate( 1, 1 );
      
      // Create a circle within the new rectangle.
      buttonPath->AddEllipse( newRectangle );
      
      // Set the button's Region property to the newly created 
      // circle region.
      roundButton->Region = gcnew System::Drawing::Region( buttonPath );
   }
// This method will change the square button to a circular button by 
// creating a new circle-shaped GraphicsPath object and setting it 
// to the RoundButton objects region.
private void roundButton_Paint(object sender, 
	System.Windows.Forms.PaintEventArgs e)
{

	System.Drawing.Drawing2D.GraphicsPath buttonPath = 
		new System.Drawing.Drawing2D.GraphicsPath();

	// Set a new rectangle to the same size as the button's 
	// ClientRectangle property.
	System.Drawing.Rectangle newRectangle = roundButton.ClientRectangle;

	// Decrease the size of the rectangle.
	newRectangle.Inflate(-10, -10);
	
	// Draw the button's border.
	e.Graphics.DrawEllipse(System.Drawing.Pens.Black, newRectangle);

	// Increase the size of the rectangle to include the border.
	newRectangle.Inflate( 1,  1);

	// Create a circle within the new rectangle.
	buttonPath.AddEllipse(newRectangle);
			
	// Set the button's Region property to the newly created 
	// circle region.
	roundButton.Region = new System.Drawing.Region(buttonPath);

}
' This method will change the square button to a circular button by 
' creating a new circle-shaped GraphicsPath object and setting it 
' to the RoundButton objects region.
Private Sub roundButton_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles roundButton.Paint

    Dim buttonPath As New System.Drawing.Drawing2D.GraphicsPath

    ' Set a new rectangle to the same size as the button's 
    ' ClientRectangle property.
    Dim newRectangle As Rectangle = roundButton.ClientRectangle

    ' Decrease the size of the rectangle.
    newRectangle.Inflate(-10, -10)

    ' Draw the button's border.
    'e.Graphics.DrawEllipse(System.Drawing.Pens.Black, newRectangle)

    'Increase the size of the rectangle to include the border.
    newRectangle.Inflate(1, 1)

    ' Create a circle within the new rectangle.
    buttonPath.AddEllipse(newRectangle)
    e.Graphics.DrawPath(Pens.Black, buttonPath)
    ' Set the button's Region property to the newly created 
    ' circle region.
    roundButton.Region = New System.Drawing.Region(buttonPath)

End Sub

Комментарии

Область окна — это коллекция точек внутри окна, где разрешено рисование в операционной системе.The window region is a collection of pixels within the window where the operating system permits drawing. Операционная система не отобразить любую часть окна, которое находится за пределами этой области.The operating system does not display any portion of a window that lies outside of the window region. Координаты области элемента управления, относительно верхнего левого угла элемента управления, а не клиентской области элемента управления.The coordinates of a control's region are relative to the upper-left corner of the control, not the client area of the control.

Примечание

Коллекция точек, содержащихся в области могут быть несмежными.The collection of pixels contained with the region can be noncontiguous.

Безопасность

UIPermission
для всех окон задать значение этого свойства.for all windows to set this property value. Связанное перечисление: AllWindowsAssociated enumeration: AllWindows

Применяется к

Дополнительно