Class: TEgDBGridEx
property OnTitleImageClick: TEgDBGridTitleImageClick;Fired when a click lands specifically on a column’s title image (see
TEgColumn.TitleImageIndex),
rather than elsewhere in the title cell. Mutually exclusive with OnTitleCellClick
for the same click - the same way a click on the sort-arrow glyph
already takes priority over a plain title click. Also available at
column level (see TEgColumn.OnTitleImageClick);
when both are assigned, the grid-level handler runs first. See TEgDBGridTitleImageClick.
Column.TitleImageIndex must actually be set for this
event to have anything to click - an image drawn only via OnBeforeDrawTitle
without also setting TitleImageIndex is not detected as a
title image for click purposes.