Class: TEgColumn
procedure Assign(Source: TPersistent); override;Copies this unit’s own additions - the nineteen overridable
properties (only those actually set on Source, per its AssignedValues),
ImageIndex,
TitleImageIndex,
ImageAlignment,
TitleImageAlignment,
SubTitle, SubTitleFont,
and all ten event properties - in addition to whatever the inherited
TColumn.Assign already copies (FieldName,
Width, Alignment, Color,
Font, Title, and so on). Without this
override, duplicating or reordering a column at design time (which goes
through Assign) would silently drop every per-column
override back to “follow the grid” on the copy.
Follows TColumn.Assign’s own pattern: calls RestoreDefaults
first (clearing everything to “follow the grid”), then copies each of
the nineteen overridable properties only if
Source.AssignedValues shows it was actually overridden
there - duplicating a column that never touched CheckKind,
for instance, does not manufacture an override on the copy.
ImageIndex/TitleImageIndex/ImageAlignment/TitleImageAlignment/
SubTitle/SubTitleFont and the ten event
properties always copy unconditionally, since none of them has an
AssignedValues-tracked “resolved default” concept.