FMX.ListView.TListViewBase.OnDeleteItem
Delphi
property OnDeleteItem: TDeleteItemEvent read FOnDeleteItem write FOnDeleteItem;
C++
__property TDeleteItemEvent OnDeleteItem = {read=FOnDeleteItem, write=FOnDeleteItem};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| event | public | FMX.ListView.pas FMX.ListView.hpp |
FMX.ListView | TListViewBase |
Description
Occurs when a user requests the deletion of a list view item, after this deletion takes place. To catch the deletion before it takes place and be able to prevent it from actually happening, write an event handler for OnDeletingItem instead.
Event handlers for this event must expect the following parameters:
Sender, the list view.AIndex, the index of the list view item that has been deleted.- Note: You cannot access the data of the deleted item at this point, since a different item is now using that index in the list view. Write an event handler for OnDeletingItem instead if you need to access information about the deleted item.
The code snippet below updates the text in a status bar after an item is deleted to show the position of the deleted item, as well as the number of remaining items in the list:
Delphi:
procedure TMainForm.ListViewDeleteItem(Sender: TObject; AIndex: Integer);
begin
StatusBar.Text := 'Item ' + IntToStr(AIndex+1) + ' has been removed from the list. ' +
IntToStr((Sender as TListView).Items.Count) + ' items remaining.';
end;
C++:
void __fastcall TMainForm::ListViewDeleteItem(TObject *Sender, int AIndex)
{
TListView* list = reinterpret_cast<TListView*>(Sender);
MainForm->StatusBar->Text = "Item " + UnicodeString(AIndex+1) + " has been removed from the list. " +
UnicodeString(list->Items->Count) + " items remaining.";
}