TWinControl.ParentDoubleBuffered property

Declaration

property ParentDoubleBuffered: Boolean read FParentDoubleBuffered write SetParentDoubleBuffered default True;

Description

ParentDoubleBuffered is a Boolean property which indicates the value for the DoubleBuffered property in the Parent control. The default value for the property is True. Changing the value for the property causes a CM_PARENTDOUBLEBUFFEREDCHANGED message to be performed (for the control) when Parent has been assigned.

To disable double buffering for a single control, make sure both DoubleBuffered and ParentDoubleBuffered are set to False.

Double buffering is a technique used to reduce screen flicker when controls are redrawn. It uses an additional off-screen buffer to perform drawing operations, and transfers the content to the on-screen buffer when completed.

DoubleBuffered and ParentDoubleBuffered are implemented for the Win32 platform/widgetset. It is implemented for TWinControl (and descendants) and TApplication. In TApplication, the setting is applied to all forms and controls when assigned before the forms and controls are created.

See also

• DoubleBuffered
• Parent