mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-10-31 08:04:48 +01:00
393 lines
10 KiB
ObjectPascal
393 lines
10 KiB
ObjectPascal
{
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/***************************************************************************
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combobox.pp
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-------------
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Example/test program for combobox usage in lcl
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***************************************************************************/
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***************************************************************************
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* *
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* This source is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This code is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License for more details. *
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* *
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* A copy of the GNU General Public License is available on the World *
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* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
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* obtain it by writing to the Free Software Foundation, *
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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* *
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***************************************************************************
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}
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program ComboBox;
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{$mode objfpc}{$H+}
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uses
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Interfaces, Classes, StdCtrls, Forms, Buttons, Menus, ComCtrls,
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SysUtils, Extctrls, Controls;
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type
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TForm1 = class(TFORM)
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public
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Label1: TLabel;
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Label2: TLabel;
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Label3: TLabel;
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Button1: TButton;
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Button2: TButton;
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Button3: TButton;
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Button4: TButton;
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Button5: TButton;
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Button6: TButton;
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Button7: TButton;
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Edit1: TEdit;
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mnuMain: TMainMenu;
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itmFileQuit: TMenuItem;
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itmFile: TMenuItem;
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ComboBox1: TComboBox;
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ComboBox2: TComboBox;
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Memo1: TMemo;
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constructor Create(AOwner: TComponent); override;
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procedure LoadMainMenu;
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procedure FormKill(Sender: TObject);
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procedure mnuQuitClicked(Sender: TObject);
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protected
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procedure Button1CLick(Sender: TObject);
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procedure Button2CLick(Sender: TObject);
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procedure Button3CLick(Sender: TObject);
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procedure Button4CLick(Sender: TObject);
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procedure Button5CLick(Sender: TObject);
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procedure Button6CLick(Sender: TObject);
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procedure Button7CLick(Sender: TObject);
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procedure ComboOnChange(Sender: TObject);
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procedure ComboOnClick(Sender: TObject);
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end;
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var
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Form1 : TForm1;
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constructor TForm1.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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Caption := 'ComboBox Demo v 0.1';
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LoadMainMenu;
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end;
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procedure TForm1.Button1Click(Sender : TObject);
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Begin
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if assigned (ComboBox1) and assigned (edit1)
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then ComboBox1.Text := edit1.text;
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End;
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procedure TForm1.Button2Click(Sender : TObject);
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Begin
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{ if assigned (ComboBox1)
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then Combobox1.Items.Add ('item ' + IntToStr (comboBox1.Items.Count));
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if assigned (ComboBox2)
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then Combobox2.Items.Add ('item ' + IntToStr (comboBox2.Items.Count));}
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ComboBox1.Items.Add(Edit1.Text);
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ComboBox2.Items.Add(Edit1.Text);
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End;
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procedure TForm1.Button3Click(Sender : TObject);
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Begin
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if assigned (ComboBox1) and assigned (edit1)
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then edit1.Text := ComboBox1.Text;
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End;
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procedure TForm1.Button4Click(Sender : TObject);
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Begin
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if assigned (ComboBox1)
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then ComboBox1.Enabled := not ComboBox1.Enabled;
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End;
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procedure TForm1.Button5Click(Sender : TObject);
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var
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i : integer;
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Begin
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if assigned (ComboBox1) then
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begin
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i := 0;
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while i < ComboBox1.Items.Count do
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begin
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if assigned (Memo1)
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then Memo1.Lines.Add (ComboBox1.Items[i]);
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inc (i);
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end;
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end;
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End;
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procedure TForm1.Button6Click(Sender : TObject);
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var
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s : shortstring;
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Begin
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if assigned (ComboBox1) then
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begin
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s := Format ('%x', [ComboBox1.ItemIndex]);
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if assigned (Memo1)
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then Memo1.Lines.Add (s);
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end;
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End;
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procedure TForm1.Button7Click(Sender : TObject);
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begin
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Edit1.SelectAll;
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ComboBox1.SelectAll;
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end;
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procedure TForm1.ComboOnChange (Sender:TObject);
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var
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s : shortstring;
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begin
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if sender is TEdit
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then s := TCOntrol(Sender).name+':TEdit - '
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else if sender is TComboBox
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then s := TControl(Sender).name+':TComboBox - '
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else
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s := 'UNKNOWN';
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if assigned (Memo1)
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then Memo1.Lines.Add (s + 'ONChange');
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end;
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procedure TForm1.ComboOnClick (Sender:TObject);
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begin
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if assigned (Memo1)
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then Memo1.Lines.Add ('ONClick');
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end;
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{------------------------------------------------------------------------------}
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procedure TForm1.FormKill(Sender : TObject);
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Begin
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End;
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{------------------------------------------------------------------------------}
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procedure TForm1.LoadMainMenu;
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begin
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OnDestroy := @FormKill;
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{ set the height and width }
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Height := 350;
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Width := 700;
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{ Create 2 buttons inside the groupbox }
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Button2 := TButton.Create(Self);
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Button2.Parent := Self;
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Button2.Left := 50;
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Button2.Top := 40;
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Button2.Width := 120;
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Button2.Height := 30;
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Button2.Show;
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Button2.Caption := 'Add item';
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Button2.OnClick := @Button2Click;
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Button1 := TButton.Create(Self);
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Button1.Parent := Self;
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Button1.Left := 50;
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Button1.Top := 80;
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Button1.Width := 120;
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Button1.Height := 30;
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Button1.Show;
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Button1.Caption := 'Edit->Combo';
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Button1.OnClick := @Button1Click;
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{ Create 2 more buttons outside the groupbox }
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Button3 := TButton.Create(Self);
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Button3.Parent := Self;
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Button3.Left := 50;
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Button3.Top := 120;
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Button3.Width := 120;
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Button3.Height := 30;
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Button3.Show;
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Button3.Caption := 'Combo->Edit';
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Button3.OnClick := @Button3Click;
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Button4 := TButton.Create(Self);
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Button4.Parent := Self;
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Button4.Left := 50;
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Button4.Top := 160;
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Button4.Width := 120;
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Button4.Height := 30;
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Button4.Show;
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Button4.Caption := 'Enabled On/Off';
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Button4.OnClick := @Button4Click;
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Button5 := TButton.Create(Self);
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Button5.Parent := Self;
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Button5.Left := 50;
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Button5.Top := 200;
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Button5.Width := 120;
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Button5.Height := 30;
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Button5.Show;
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Button5.Caption := 'Dump';
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Button5.OnClick := @Button5Click;
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Button6 := TButton.Create(Self);
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Button6.Parent := Self;
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Button6.Left := 50;
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Button6.Top := 240;
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Button6.Width := 120;
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Button6.Height := 30;
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Button6.Show;
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Button6.Caption := 'Index ?';
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Button6.OnClick := @Button6Click;
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Button7 := TButton.Create(Self);
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Button7.Parent := Self;
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Button7.Left := 50;
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Button7.Top := 280;
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Button7.Width := 120;
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Button7.Height := 30;
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Button7.Show;
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Button7.Caption := 'Select All';
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Button7.OnClick := @Button7Click;
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{ Create a label for the edit field }
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label1 := TLabel.Create(Self);
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label1.Parent := self;
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label1.top := 50;
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label1.left := 320;
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label1.Height := 20;
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label1.Width := 130;
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label1.Show;
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label1.Caption := 'TEdit :';
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Edit1 := TEdit.Create (self);
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with Edit1 do
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begin
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Parent := self;
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Left := 500;
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Top := 50;
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Width := 70;
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Height := 20;
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OnChange := @ComboOnChange;
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OnClick := @ComboOnClick;
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Name := 'Edit1';
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Show;
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end;
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{ Create a label for the 1st combobox }
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label2 := TLabel.Create(Self);
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label2.Parent := self;
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label2.top := 100;
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label2.left := 320;
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label2.Height := 20;
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label2.Width := 130;
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label2.Enabled:= true;
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label2.Show;
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label2.Caption := 'Combo (unsorted)';
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label2.Enabled:= true;
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{ Create the menu now }
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{ WARNING: If you do it after creation of the combo, the menu will not
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appear. Reason is unknown by now!!!!!!}
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mnuMain := TMainMenu.Create(Self);
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Menu := mnuMain;
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itmFile := TMenuItem.Create(Self);
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itmFile.Caption := '&File';
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mnuMain.Items.Add(itmFile);
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itmFileQuit := TMenuItem.Create(Self);
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itmFileQuit.Caption := '&Quit';
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itmFileQuit.OnClick := @mnuQuitClicked;
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itmFile.Add(itmFileQuit);
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ComboBox1 := TComboBox.Create (self);
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with ComboBox1 do
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begin
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Parent := self;
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Left := 500;
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Top := 100;
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Width := 170;
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Height := 20;
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Style := csDropDown;
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Items.Add ('wohhh!');
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Items.Add ('22222!');
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ItemIndex := 1;
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Items.Add ('33333!');
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Items.Add ('abcde!');
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OnChange := @ComboOnChange;
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OnClick := @ComboOnClick;
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Name := 'ComboBox1';
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Show;
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end;
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{ Create a label for the 2nd combobox }
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label3 := TLabel.Create(Self);
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label3.Parent := self;
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label3.top := 150;
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label3.left := 320;
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label3.Height := 20;
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label3.Width := 130;
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label3.Show;
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label3.Caption := 'Combo (sorted)';
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ComboBox2 := TComboBox.Create (self);
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with ComboBox2 do
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begin
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Parent := self;
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Left := 500;
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Top := 150;
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Width := 170;
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Height := 20;
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Style := csDropDownList;
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Items.Add ('wohhh!');
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Items.Add ('22222!');
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ItemIndex := 1;
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Items.Add ('33333!');
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Items.Add ('abcde!');
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Name := 'ComboBox2';
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OnChange := @ComboOnChange;
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OnClick := @ComboOnClick;
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Sorted := true;
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Show;
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end;
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Memo1 := TMemo.Create(Self);
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with Memo1 do
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begin
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Parent := Self;
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Scrollbars := ssBoth;
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Left := 200;
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Top := 200;
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Width := 335;
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Height := 155;
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Show;
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end;
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end;
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{------------------------------------------------------------------------------}
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procedure TForm1.mnuQuitClicked(Sender : TObject);
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begin
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Close;
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end;
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{------------------------------------------------------------------------------}
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begin
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Application.Initialize; { calls InitProcedure which starts up GTK }
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Application.CreateForm(TForm1, Form1);
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Application.Run;
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end.
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