Felipe Monteiro de Carvalho wrote:
Hello,
I was implementing TMenu for Qt, when I got a little confused by
component arrays.
On the file menu.inc I see this:
procedure TMenu.CreateHandle;
var i: integer;
begin
FItems.Handle := TWSMenuClass(WidgetSetClass).CreateHandle(Self);
// initiate creation of subitems
// Note: FItems is a TMenuItem. Using HandleNeeded will create all
subitems.
for i:=0 to Items.Count-1 do
if Items[i].Visible then
Items[i].HandleNeeded;
end;
And here is how Items is declared on this class:
FItems: TMenuItem;
..............
property Items: TMenuItem read FItems;
My doubts are:
1 ) Can I just take a property and use it as an array like that??
No, you cant. Not just any property.
Shouldn't that property be declared like this:
property Items[Index: Integer]: TMenuItem read FItems;
TMenuItem has a default Items[] property.
So the code actually looks like:
Items.Items[i]
Since the second Items is default you may leave that one out.
2) And if it was declared like above, shouldn't FItems be an array of
TMenuItem ?
Are TComponent descendents naturally arrayable or something like that?
No.
Marc
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