TCustomImageList.Overlays property
Provides access to images used as overlays in the image list.
Declaration
property Overlays: TOverlayArray read FOverlays;Description
Overlays is a read-only
TOverlayArray property which
provides access to images used as overlays in the image list. An overlay image
is a mask drawn transparently over another image to represent its state or
enhanced drawing style. Each element in the array is an Integer value with the
ordinal position for an image in the list used as an overlay. Up to 15 of the
images in the list can be used as an overlay image.
Values in Overlays are stored when the Overlay method is called to designate a specified image index for use in the overlay position. The ClearOverlays method causes each of the elements in Overlays to be set to -1 to indicate that an image index has not been assigned for the overlay position. Use HasOverlays to determine whether any images in the list have been designated as an overlay image.
A value in Overlays is passed as an argument to the DrawOverlay method for the image list resolution. Controls which utilize the Overlays feature include TTreeView and TLvlGraphControl (but not TListView).
Added in LCL version 5.0.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.