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unit view_impl;
{$mode objfpc}{$H+}
interface
uses
Classes, gui_listbox, gui_combobox, basic_intf;
type
TListBoxView = class(TfpgListBox, IObserver)
private
procedure IObserver.Update = ObserverUpdate;
procedure ObserverUpdate(Subject: IInterface);
end;
TComboBoxView = class(TfpgComboBox, IObserver)
private
procedure IObserver.Update = ObserverUpdate;
procedure ObserverUpdate(Subject: IInterface);
end;
implementation
{ TListBoxView }
procedure TListBoxView.ObserverUpdate(Subject: IInterface);
var
Obj: IListModel;
i: integer;
begin
Subject.QueryInterface(IListModel, Obj);
if Obj <> nil then
begin
Items.BeginUpdate;
Items.Clear;
// for i := 0 to Obj.Count-1 do
// Items.Add(Obj.Item[i]);
Items.EndUpdate;
end;
end;
{ TComboBoxView }
procedure TComboBoxView.ObserverUpdate(Subject: IInterface);
var
Obj: IListModel;
i: integer;
begin
Subject.QueryInterface(IListModel, Obj);
if Obj <> nil then
begin
Items.BeginUpdate;
Items.Clear;
// for i := 0 to Obj.Count-1 do
// Items.Add(Obj.Item[i]);
FocusItem := 1;
Items.EndUpdate;
end;
end;
end.
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