/usr/lib/lazarus/0.9.30.4/examples/trackbar.pp is in lazarus-src-0.9.30.4 0.9.30.4-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/***************************************************************************
trackbar - example
------------------
Just a simple example to show & verify functionality
of the lazarus TTrackbar class.
Initial Revision : Sun Aug 05 1999
by Stefan Hille <stoppok@osibisa.ms.sub.org>
TODO: - button "orientation" will crash the program if pressed
- add a label which displays current trackbar value and is updated
by a procedure connected to "OnChange"
***************************************************************************/
***************************************************************************
* *
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
***************************************************************************
}
program Trackbar;
{$mode objfpc}{$H+}
uses
Interfaces, Classes, Forms, Buttons, StdCtrls, Menus, ComCtrls,
SysUtils, Controls;
type
TForm1 = class(TFORM)
public
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
Button8: TButton;
Track1 : TTRackBar;
Track2 : TTRackBar;
mnuMain: TMainMenu;
itmFile: TMenuItem;
itmFileQuit: TMenuItem;
constructor Create(AOwner: TComponent); override;
procedure LoadMainMenu;
procedure mnuQuitClicked(Sender : TObject);
protected
procedure Button1CLick(Sender : TObject);
procedure Button2CLick(Sender : TObject);
procedure Button3CLick(Sender : TObject);
procedure Button4CLick(Sender : TObject);
procedure Button5CLick(Sender : TObject);
procedure Button6CLick(Sender : TObject);
procedure Button7CLick(Sender : TObject);
procedure Button8CLick(Sender : TObject);
procedure Track1Change(Sender : TObject);
end;
var
Form1 : TForm1;
constructor TForm1.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
Caption := 'TrackBar Demo v0.1';
LoadMainMenu;
end;
procedure TForm1.Button1Click(Sender : TObject);
Begin
if assigned (Track1) then begin
Track1.Max := Track1.Max + 1;
end;
End;
procedure TForm1.Button2Click(Sender : TObject);
Begin
if assigned (track1) then begin
if Track1.orientation = trHorizontal
then Track1.orientation := trVertical
else Track1.orientation := trHorizontal;
end;
End;
procedure TForm1.Button3Click(Sender : TObject);
Begin
if assigned (Track1) then begin
writeln ('Setting new position');
Track1.Position := Track1.Position + 1;
end;
End;
procedure TForm1.Button4Click(Sender : TObject);
Begin
if assigned (Track1) then begin
writeln ('Setting new position for scale. Old:', ord (Track1.ScalePos));
case Track1.ScalePos of
trLeft : Track1.ScalePos := trRight;
trRight : Track1.ScalePos := trTop;
trTop : Track1.ScalePos := trBottom;
trBottom: Track1.ScalePos := trLeft;
end;
end;
End;
procedure TForm1.Button5Click(Sender : TObject);
Begin
if assigned (Track1) then begin
writeln ('Toggling showing tickmarks');
if Track1.TickStyle = tsNone
then Track1.TickStyle := tsAuto
else Track1.TickStyle := tsNone;
end;
End;
procedure TForm1.Button6Click(Sender : TObject);
Begin
if assigned (Track1) then begin
end;
End;
procedure TForm1.Button7Click(Sender : TObject);
Begin
if assigned (Track1) then begin
writeln ('Incrementing LineSize');
Track1.LineSize := Track1.LineSize + 1;
end;
End;
procedure TForm1.Button8Click(Sender : TObject);
Begin
if assigned (Track1) then begin
writeln ('Incrementing PageSize');
Track1.PageSize := Track1.PageSize + 1;
end;
End;
procedure TForm1.Track1Change(Sender : TObject);
begin
if assigned (Track1) then begin
writeln ('*** CALLBACK ONCHANGE!!!!! ***');
Track1.PageSize := Track1.PageSize + 1;
end;
end;
{------------------------------------------------------------------------------}
procedure TForm1.LoadMainMenu;
begin
{ set the height and width }
Height := 350;
Width := 700;
{ Setting up horizontal trackbar }
Track1 := TTrackBar.Create (Self);
Track1.Parent := Self;
Track1.Left := 50;
Track1.Top := 150;
Track1.Width := 140;
Track1.Height := 140;
Track1.Min := 0;
Track1.Max := 100;
Track1.OnChange := @Track1Change;
Track1.Show;
{ Setting up vertical trackbar }
Track2 := TTrackBar.Create (Self);
Track2.Parent := Self;
Track2.Orientation := trVertical;
Track2.Left := 500;
Track2.Top := 150;
Track2.Width := 20;
Track2.Height := 100;
Track2.Min := 0;
Track2.Max := 100;
Track2.Show;
{ create some buttons to change trackbar properties }
Button2 := TButton.Create(Self);
button2.Parent := Self;
Button2.Left := 200;
Button2.Top := 30;
Button2.Width := 100;
Button2.Height := 30;
Button2.Caption := 'Orientation';
Button2.OnClick := @Button2Click;
Button2.Show;
Button1 := TButton.Create(Self);
button1.Parent := Self;
Button1.Left := 200;
Button1.Top := 70;
Button1.Width := 100;
Button1.Height := 30;
Button1.Caption := 'Max++';
Button1.OnClick := @Button1Click;
Button1.Show;
Button3 := TButton.Create(Self);
button3.Parent := Self;
Button3.Left := 200;
Button3.Top := 110;
Button3.Width := 100;
Button3.Height := 30;
Button3.Show;
Button3.Caption := 'Position++';
Button3.OnClick := @Button3Click;
Button4 := TButton.Create(Self);
button4.Parent := Self;
Button4.Left := 350;
Button4.Top := 30;
Button4.Width := 130;
Button4.Height := 30;
Button4.Show;
Button4.Caption := 'GTK: TextPos';
Button4.OnClick := @Button4Click;
Button5 := TButton.Create(Self);
button5.Parent := Self;
Button5.Left := 350;
Button5.Top := 70;
Button5.Width := 130;
Button5.Height := 30;
Button5.Show;
Button5.Caption := 'GTK: Show Text';
Button5.OnClick := @Button5Click;
Button6 := TButton.Create(Self);
button6.Parent := Self;
Button6.Left := 350;
Button6.Top := 110;
Button6.Width := 130;
Button6.Height := 30;
Button6.Show;
Button6.Caption := '---';
Button6.Visible := false;
Button6.OnClick := @Button6Click;
Button7 := TButton.Create(Self);
button7.Parent := Self;
Button7.Left := 200;
Button7.Top := 150;
Button7.Width := 100;
Button7.Height := 30;
Button7.Show;
Button7.Caption := 'LineSize++';
Button7.OnClick := @Button7Click;
Button8 := TButton.Create(Self);
button8.Parent := Self;
Button8.Left := 350;
Button8.Top := 150;
Button8.Width := 130;
Button8.Height := 30;
Button8.Caption := 'PageSize++';
Button8.OnClick := @Button8Click;
Button8.Show;
{ create a menubar }
mnuMain := TMainMenu.Create(Self);
Menu := mnuMain;
itmFile := TMenuItem.Create(Self);
itmFile.Caption := 'File';
Menu.Items.Add(itmFile);
itmFileQuit := TMenuItem.Create(Self);
itmFileQuit.Caption := 'Quit';
itmFileQuit.OnClick := @mnuQuitClicked;
itmFile.Add(itmFileQuit);
end;
{------------------------------------------------------------------------------}
procedure TForm1.mnuQuitClicked(Sender : TObject);
begin
Close;
end;
{------------------------------------------------------------------------------}
begin
Application.Initialize; { calls InitProcedure which starts up GTK }
Application.CreateForm(TForm1, Form1);
Application.Run;
end.
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