TCustomComboBox.DrawItem procedure
Draws a list item, using the OnDrawItem handler (when assigned).
Declaration
procedure DrawItem(Index: Integer; ARect: TRect; State: TOwnerDrawState)
; virtualArguments
Index | The position for the item drawn in the method. |
ARect | The area to paint on the Canvas. |
State | The drawing state for the item (selected...). |
Description
DrawItem is a procedure used to draw a list item defined in the
Items property. DrawItem is called when the
LM_DrawListItem message is handled for the control. Arguments
passed to the method include the position in Items for the value drawn, the
canvas rectangle where the drawing occurs, and the drawing state for the list
item.
DrawItem signals the OnDrawItem handler (when assigned) to perform the drawing operation. Otherwise, default painting is performed by filling the background for the Canvas rectangle (if needed) and calling the InternalDrawItem routine.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.