property OnBeforeImageDrawEx: TIEImageDrawEventEx;
Occurs immediately before the image of index, idx
, is painted.Left
are the top-left coordinates where the image will be drawn (i.e. destination bitmap coordinates).Dest
is the destination bitmap (containing the canvas where the image must be drawn).ThumbRect
specifies the destination rectangle for the image. You can change this parameter to control where the image is drawn.
Note: When this event is assigned, the selection is not shown.
See the Multi\CustomThumbs demo for more info.
are identical, except that OnBeforeImageDrawEx
includes a ThumbRect
parameter. Also if OnBeforeImageDrawEx
is used the selection is not shown.