TCustomControl.PaintWindow procedure
The Paint handler plug-in, intercepting paint requests.
Declaration
procedure PaintWindow(DC: HDC); overrideArguments
DC | The Device Context used to draw on the Canvas. |
Description
PaintWindow is an overridden method in TCustomControl. It ensures
that Canvas has an allocated Handle which matches the device context
specified in the DC argument. If the Canvas handle does not match DC, the
value in the argument is assigned to Canvas.
PaintWindow calls the Paint method to signal the OnPaint event handler (when assigned).
If Handle value in Canvas was changed in the method, it is reset to 0 (unassigned) prior to exit.
PaintWindow does not call the inherited method.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.