Class: TEgDBGridEx
property OnCellImageClick: TEgDBGridCellImageClick;Fired instead of the native OnCellClick
when a data-cell click lands on that column’s ImageIndex
icon (drawn by the same logic as OnBeforeDrawCell’s
own ImageIndex/ImageAlignment). See TEgDBGridCellImageClick.
This is a deliberate exception: every other title/cell click pair in
this unit (for example OnTitleImageClick)
always lets its native counterpart fire too, and only suppresses its own
custom companion event. OnCellImageClick instead replaces
OnCellClick outright for that one click - the native event
does not fire alongside it.
Also available at column level (see TEgColumn.OnCellImageClick);
when both are assigned, the grid-level handler runs first.
Never a checkbox column, which never shows this icon at all. For
every other column kind, this covers ImageIndex exactly as
it is actually drawn - including the graphic/BLOB overlay case:
Null, or content that failed to decode as a
recognized image format: the icon is the cell’s only content (the usual
fallback icon).ImageIndex for
its position in this case) - a click landing on it fires
OnCellImageClick here too, not just in the fallback
case.The icon’s ImageIndex/ImageAlignment are
resolved exactly as they would be drawn - including whatever OnBeforeDrawCell
changes them to - without actually painting anything. This means:
ImageOnSelectedOnly
is honored precisely: a click that only just now selects a previously
unselected row is treated as an ordinary OnCellClick, even
though the icon becomes visible there once that same click’s own
selection change completes - only a click on a cell/row that was
already current counts as landing on a visible icon.ShowImageOnEmpty
is honored the same way.A click on the icon never leaves the cell in edit mode, even where a second click on an already-current cell would normally open the in-place editor.