A component I am working on uses a TCollection to hold links to other components. When the items are edited in the designer their labels look something like this:
0 - TComponentLink
1 - TComponentLink
2 - TComponentLink
3 - TComponentLink
How do I add meaningful labels (the name of the linked component perhaps)? e.g.
0 - UserList
1 - AnotherComponentName
2 - SomethingElse
3 - Whatever
As a bonus, can you tell me how to make the collection editor appear when the component is double clicked?
To display a meaningful name override GetDisplayName:
function TMyCollectionItem.GetDisplayName: string;
begin
Result := 'My collection item name';
end;
To display a collection editor when the non visual component is double clicked you need to override the TComponentEditor Edit procedure.
TMyPropertyEditor = class(TComponentEditor)
public
procedure Edit; override; // <-- Display the editor here
end;
... and register the editor:
RegisterComponentEditor(TMyCollectionComponent, TMyPropertyEditor);