Unit 'Controls' Package
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TWinControl.ParentDoubleBuffered

Value for the DoubleBuffered property in a Parent control.

Declaration

Source position: controls.pp line 2292

public property TWinControl.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

TWinControl.DoubleBuffered

  

Allows to reduce flicker in the painting of the control.

TControl.Parent

  

The control within which the control is shown.



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