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{
/***************************************************************************
Scrollbar - Example
------------------
Initial Revision : Thursday Feb 01 2001
by Shane Miller
Second Revision : Saturday Jul 12 2014
by Jack D Linke
***************************************************************************/
***************************************************************************
* *
* 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 Scrollbar;
{$mode objfpc}{$H+}
uses
Interfaces, Classes, StdCtrls, Forms, Buttons, Menus, ComCtrls,
SysUtils, ExtCtrls, Controls, LazLogger;
type
TForm1 = class(TFORM)
Scrollbar1 : TScrollbar;
Button1 : TButton;
Button2 : TButton;
Button3 : TButton;
Button4 : TButton;
Label1 : TLabel;
Label2 : TLabel;
Label3 : TLabel;
LabelMin : TLabel;
LabelMax : TLabel;
LabelPos : TLabel;
Procedure Button1Clicked(Sender : TObject);
Procedure Button2Clicked(Sender : TObject);
Procedure Button3Clicked(Sender : TObject);
Procedure Button4Clicked(Sender : TObject);
Procedure Scrollbar1Changed(Sender : TObject);
procedure Scrollbar1OnScroll(Sender: TObject; ScrollCode: TScrollCode; var ScrollPos: Integer);
public
constructor Create(AOwner: TComponent); override;
protected
end;
var
Form1 : TForm1;
constructor TForm1.Create(AOwner: TComponent);
begin
inherited CreateNew(AOwner, 1);
Caption := 'Scrollbar Demo v0.2';
Height := 350;
Width := 400;
ScrollBar1 := TSCrollBar.Create(self);
with Scrollbar1 do
Begin
Parent := Self;
Kind := sbVertical;
Left := 100;
Top := 50;
Width := 15;
Height := 300;
Visible := True;
OnChange := @scrollbar1Changed;
OnScroll := @ScrollBar1OnScroll;
end;
Button1 := TButton.create(self);
with Button1 do
begin
Parent := self;
Visible := True;
Caption := 'Swap Orientation';
Onclick := @button1clicked;
Width := 100;
end;
Button2 := TButton.create(self);
with Button2 do
begin
Parent := self;
Left := 100;
Visible := True;
Caption := 'Min + 20';
Onclick := @button2clicked;
Width := 100;
end;
Button3 := TButton.create(self);
with Button3 do
begin
Parent := self;
Left := 200;
Visible := True;
Caption := 'Max + 25';
Onclick := @button3clicked;
Width := 100;
end;
Button4 := TButton.create(self);
with Button4 do
begin
Parent := self;
Left := 300;
Visible := True;
Caption := 'Position + 5';
Onclick := @button4clicked;
Width := 100;
end;
Label1 := TLabel.create(self);
with Label1 do
begin
Parent := self;
Left := 125;
Top := 100;
Visible := True;
Caption := 'Scrollbar1.Min = ';
Width := 100;
end;
Label2 := TLabel.create(self);
with Label2 do
begin
Parent := self;
Left := 125;
Top := 130;
Visible := True;
Caption := 'Scrollbar1.Max = ';
Width := 100;
end;
Label3 := TLabel.create(self);
with Label3 do
begin
Parent := self;
Left := 125;
Top := 160;
Visible := True;
Caption := 'Scrollbar1.Position = ';
Width := 100;
end;
LabelMin := TLabel.create(self);
with LabelMin do
begin
Parent := self;
Left := 250;
Top := 100;
Visible := True;
Caption := IntToStr(Scrollbar1.Min);
Width := 100;
end;
LabelMax := TLabel.create(self);
with LabelMax do
begin
Parent := self;
Left := 250;
Top := 130;
Visible := True;
Caption := IntToStr(Scrollbar1.Max);
Width := 100;
end;
LabelPos := TLabel.create(self);
with LabelPos do
begin
Parent := self;
Left := 250;
Top := 160;
Visible := True;
Caption := IntToStr(Scrollbar1.Position);
Width := 100;
end;
end;
procedure TForm1.Button1Clicked(Sender : TObject);
begin
debugln('[Button1Clicked]');
if ScrollBar1.Kind = sbHorizontal then
Scrollbar1.Kind := sbVertical else
Scrollbar1.kind := sbHorizontal;
end;
procedure TForm1.Button2Clicked(Sender : TObject);
begin
ScrollBar1.Min := ScrollBar1.Min + 20;
LabelMin.Caption := IntToStr(ScrollBar1.Min);
end;
procedure TForm1.Button3Clicked(Sender : TObject);
begin
ScrollBar1.Max := ScrollBar1.Max + 25;
LabelMax.Caption := IntToStr(ScrollBar1.Max);
end;
procedure TForm1.Button4Clicked(Sender : TObject);
begin
Scrollbar1.Position := ScrollBar1.Position + 5;
LabelPos.Caption := IntToStr(ScrollBar1.Position);
end;
procedure TForm1.Scrollbar1Changed(Sender : TObject);
begin
LabelMin.Caption := IntToStr(Scrollbar1.Min);
LabelMax.Caption := IntToStr(Scrollbar1.Max);
LabelPos.Caption := IntToStr(Scrollbar1.Position);
end;
procedure TForm1.Scrollbar1OnScroll(Sender: TObject; ScrollCode: TScrollCode; var ScrollPos: Integer);
begin
DebugLn('.............Scrolled...............');
end;
begin
Application.Initialize; { calls InitProcedure which starts up GTK }
Application.CreateForm(TForm1, Form1);
Application.Run;
end.
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