TCustomCheckListBox.DrawItem procedure
Adjusts the drawing area for the specified item, and renders it on the control.
Declaration
procedure DrawItem(AIndex: Integer; ARect: TRect;
State: TOwnerDrawState); overrideArguments
AIndex | Ordinal position in Items for the entry drawn in the method. |
ARect | TRectangle with the drawing area for the item. |
State | TOwnerDrawState for Items in the control. |
Description
DrawItem is an overridden procedure used to render the item
specified in
AIndex to the drawing area in
ARect.
DrawItem ensures that sufficient space is reserved for the check box drawn
for an item on the list box.
The Header property determines whether a check box is required for
the item, and GetCheckWidth is called to get the width for the
check box when needed. ARect is updated to increase or decrease
the horizontal boundary depending on the value in
UseRightToLeftAlignment; The right boundary is decremented for
RTL, and the left boundary is incremented for LTR.
DrawItem calls the inherited method to render the item on the list box for the control.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.