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{
***************************************************************************
* *
* This source is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This code is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* A copy of the GNU General Public License is available on the World *
* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
* obtain it by writing to the Free Software Foundation, *
* Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA. *
* *
***************************************************************************
}
program ListBoxTest;
{$mode objfpc}{$H+}
uses
Interfaces, Classes, Forms, StdCtrls, SysUtils, Controls, LazLogger;
type
TListBoxTestForm = class(TForm)
public
Button1, Button2, Button3, Button4: TButton;
ListBox: TListBox;
constructor Create(AOwner: TComponent); override;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure FormResize(Sender: TObject);
end;
var
ListBoxTestForm: TListBoxTestForm;
{------------------------------------------------------------------------------}
{ TListBoxTestForm }
{------------------------------------------------------------------------------}
constructor TListBoxTestForm.Create(AOwner: TComponent);
begin
inherited CreateNew(AOwner, 1);
Width := 300;
Height := 200;
Left := 200;
Top := 200;
// create children
Button1 := TButton.Create(Self);
Button1.OnClick := @Button1Click;
Button1.Parent := Self;
Button1.left := 40;
Button1.top := 170;
Button1.width := 50;
Button1.height := 25;
Button1.caption := 'New';
Button1.Show;
Button2 := TButton.Create(Self);
Button2.OnClick := @Button2Click;
Button2.Parent := Self;
Button2.left := 95;
Button2.top := 170;
Button2.width := 50;
Button2.height := 25;
Button2.caption := 'Delete';
Button2.Show;
Button3 := TButton.Create(Self);
Button3.OnClick := @Button3Click;
Button3.Parent := Self;
Button3.left := 150;
Button3.top := 170;
Button3.width := 50;
Button3.height := 25;
Button3.caption := 'Clear';
Button3.Show;
Button4 := TButton.Create(Self);
Button4.OnClick := @button4click;
Button4.Parent := Self;
Button4.left := 205;
Button4.top := 170;
Button4.width := 50;
Button4.height := 25;
Button4.caption := 'Unused';
Button4.Show;
// ListBox := TCListBox.Create(Self);
ListBox := TListBox.Create(Self);
ListBox.Parent := Self;
ListBox.Left := 10;
ListBox.Top := 10;
ListBox.Width := 280;
ListBox.Height := 150;
ListBox.Anchors := [akLeft, akRight, akTop];
{ ListBox.ExtendedSelect := true;
ListBox.MultiSelect := true;
} ListBox.Show;
OnResize := @FormResize;
end;
procedure TListBoxTestForm.Button1Click(Sender: TObject);
var
Index: integer;
begin
Index := ListBox.ItemIndex;
if Index = -1 then
ListBox.Items.Add('Button 1 clicked')
else
ListBox.Items.Insert(Index, 'Button 1 clicked at '+IntToStr(Index));
for Index := 0 to ListBox.Items.Count - 1 do
ListBox.Items.Objects[Index] := TObject(PtrInt(Index));
end;
procedure TListBoxTestForm.Button2Click(Sender: TObject);
var
Index: integer;
begin
Index := ListBox.ItemIndex;
if Index <> -1
then ListBox.Items.Delete(Index);
end;
procedure TListBoxTestForm.Button3Click(Sender: TObject);
begin
ListBox.Items.Clear;
end;
procedure TListBoxTestForm.Button4Click(Sender: TObject);
var
X: PtrInt;
begin
if ListBox.ItemIndex < 0 then Exit;
X := PtrInt(ListBox.Items.Objects[ListBox.ItemIndex]);
DebugLn(['TListBoxTestForm.Button4Click ',X]);
end;
procedure TListBoxTestForm.FormResize(Sender: TObject);
begin
Caption := Format('%dx%d', [ListBox.Width, ListBox.Height]);
end;
begin
Application.Initialize;
Application.CreateForm(TListBoxTestForm, ListBoxTestForm);
Application.Run;
end.
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