mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-04-06 11:58:24 +02:00
393 lines
10 KiB
ObjectPascal
393 lines
10 KiB
ObjectPascal
{
|
|
/***************************************************************************
|
|
combobox.pp
|
|
-------------
|
|
Example/test program for combobox usage in lcl
|
|
|
|
|
|
***************************************************************************/
|
|
|
|
***************************************************************************
|
|
* *
|
|
* 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 ComboBox;
|
|
|
|
{$mode objfpc}{$H+}
|
|
|
|
uses
|
|
Interfaces, Classes, StdCtrls, Forms, Buttons, Menus, ComCtrls,
|
|
SysUtils, Extctrls, Controls;
|
|
|
|
type
|
|
TForm1 = class(TFORM)
|
|
public
|
|
Label1: TLabel;
|
|
Label2: TLabel;
|
|
Label3: TLabel;
|
|
Button1: TButton;
|
|
Button2: TButton;
|
|
Button3: TButton;
|
|
Button4: TButton;
|
|
Button5: TButton;
|
|
Button6: TButton;
|
|
Button7: TButton;
|
|
Edit1: TEdit;
|
|
mnuMain: TMainMenu;
|
|
itmFileQuit: TMenuItem;
|
|
itmFile: TMenuItem;
|
|
ComboBox1: TComboBox;
|
|
ComboBox2: TComboBox;
|
|
Memo1: TMemo;
|
|
constructor Create(AOwner: TComponent); override;
|
|
procedure LoadMainMenu;
|
|
procedure FormKill(Sender: TObject);
|
|
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 ComboOnChange(Sender: TObject);
|
|
procedure ComboOnClick(Sender: TObject);
|
|
end;
|
|
|
|
var
|
|
Form1 : TForm1;
|
|
|
|
constructor TForm1.Create(AOwner: TComponent);
|
|
begin
|
|
inherited CreateNew(AOwner, 1);
|
|
Caption := 'ComboBox Demo v 0.1';
|
|
LoadMainMenu;
|
|
end;
|
|
|
|
procedure TForm1.Button1Click(Sender : TObject);
|
|
Begin
|
|
if assigned (ComboBox1) and assigned (edit1)
|
|
then ComboBox1.Text := edit1.text;
|
|
End;
|
|
|
|
procedure TForm1.Button2Click(Sender : TObject);
|
|
Begin
|
|
{ if assigned (ComboBox1)
|
|
then Combobox1.Items.Add ('item ' + IntToStr (comboBox1.Items.Count));
|
|
if assigned (ComboBox2)
|
|
then Combobox2.Items.Add ('item ' + IntToStr (comboBox2.Items.Count));}
|
|
ComboBox1.Items.Add(Edit1.Text);
|
|
ComboBox2.Items.Add(Edit1.Text);
|
|
End;
|
|
|
|
procedure TForm1.Button3Click(Sender : TObject);
|
|
Begin
|
|
if assigned (ComboBox1) and assigned (edit1)
|
|
then edit1.Text := ComboBox1.Text;
|
|
End;
|
|
|
|
procedure TForm1.Button4Click(Sender : TObject);
|
|
Begin
|
|
if assigned (ComboBox1)
|
|
then ComboBox1.Enabled := not ComboBox1.Enabled;
|
|
End;
|
|
|
|
procedure TForm1.Button5Click(Sender : TObject);
|
|
var
|
|
i : integer;
|
|
Begin
|
|
if assigned (ComboBox1) then
|
|
begin
|
|
i := 0;
|
|
while i < ComboBox1.Items.Count do
|
|
begin
|
|
if assigned (Memo1)
|
|
then Memo1.Lines.Add (ComboBox1.Items[i]);
|
|
inc (i);
|
|
end;
|
|
end;
|
|
End;
|
|
|
|
procedure TForm1.Button6Click(Sender : TObject);
|
|
var
|
|
s : shortstring;
|
|
Begin
|
|
if assigned (ComboBox1) then
|
|
begin
|
|
s := Format ('%x', [ComboBox1.ItemIndex]);
|
|
if assigned (Memo1)
|
|
then Memo1.Lines.Add (s);
|
|
end;
|
|
End;
|
|
|
|
procedure TForm1.Button7Click(Sender : TObject);
|
|
begin
|
|
Edit1.SelectAll;
|
|
ComboBox1.SelectAll;
|
|
end;
|
|
|
|
|
|
procedure TForm1.ComboOnChange (Sender:TObject);
|
|
var
|
|
s : shortstring;
|
|
begin
|
|
if sender is TEdit
|
|
then s := TCOntrol(Sender).name+':TEdit - '
|
|
else if sender is TComboBox
|
|
then s := TControl(Sender).name+':TComboBox - '
|
|
else
|
|
s := 'UNKNOWN';
|
|
if assigned (Memo1)
|
|
then Memo1.Lines.Add (s + 'ONChange');
|
|
end;
|
|
|
|
procedure TForm1.ComboOnClick (Sender:TObject);
|
|
begin
|
|
if assigned (Memo1)
|
|
then Memo1.Lines.Add ('ONClick');
|
|
end;
|
|
{------------------------------------------------------------------------------}
|
|
|
|
procedure TForm1.FormKill(Sender : TObject);
|
|
Begin
|
|
|
|
End;
|
|
|
|
{------------------------------------------------------------------------------}
|
|
procedure TForm1.LoadMainMenu;
|
|
|
|
begin
|
|
OnDestroy := @FormKill;
|
|
|
|
{ set the height and width }
|
|
Height := 350;
|
|
Width := 700;
|
|
|
|
{ Create 2 buttons inside the groupbox }
|
|
Button2 := TButton.Create(Self);
|
|
Button2.Parent := Self;
|
|
Button2.Left := 50;
|
|
Button2.Top := 40;
|
|
Button2.Width := 120;
|
|
Button2.Height := 30;
|
|
Button2.Show;
|
|
Button2.Caption := 'Add item';
|
|
Button2.OnClick := @Button2Click;
|
|
|
|
|
|
|
|
Button1 := TButton.Create(Self);
|
|
Button1.Parent := Self;
|
|
Button1.Left := 50;
|
|
Button1.Top := 80;
|
|
Button1.Width := 120;
|
|
Button1.Height := 30;
|
|
Button1.Show;
|
|
Button1.Caption := 'Edit->Combo';
|
|
Button1.OnClick := @Button1Click;
|
|
|
|
|
|
{ Create 2 more buttons outside the groupbox }
|
|
Button3 := TButton.Create(Self);
|
|
Button3.Parent := Self;
|
|
Button3.Left := 50;
|
|
Button3.Top := 120;
|
|
Button3.Width := 120;
|
|
Button3.Height := 30;
|
|
Button3.Show;
|
|
Button3.Caption := 'Combo->Edit';
|
|
Button3.OnClick := @Button3Click;
|
|
|
|
|
|
Button4 := TButton.Create(Self);
|
|
Button4.Parent := Self;
|
|
Button4.Left := 50;
|
|
Button4.Top := 160;
|
|
Button4.Width := 120;
|
|
Button4.Height := 30;
|
|
Button4.Show;
|
|
Button4.Caption := 'Enabled On/Off';
|
|
Button4.OnClick := @Button4Click;
|
|
|
|
Button5 := TButton.Create(Self);
|
|
Button5.Parent := Self;
|
|
Button5.Left := 50;
|
|
Button5.Top := 200;
|
|
Button5.Width := 120;
|
|
Button5.Height := 30;
|
|
Button5.Show;
|
|
Button5.Caption := 'Dump';
|
|
Button5.OnClick := @Button5Click;
|
|
|
|
Button6 := TButton.Create(Self);
|
|
Button6.Parent := Self;
|
|
Button6.Left := 50;
|
|
Button6.Top := 240;
|
|
Button6.Width := 120;
|
|
Button6.Height := 30;
|
|
Button6.Show;
|
|
Button6.Caption := 'Index ?';
|
|
Button6.OnClick := @Button6Click;
|
|
|
|
Button7 := TButton.Create(Self);
|
|
Button7.Parent := Self;
|
|
Button7.Left := 50;
|
|
Button7.Top := 280;
|
|
Button7.Width := 120;
|
|
Button7.Height := 30;
|
|
Button7.Show;
|
|
Button7.Caption := 'Select All';
|
|
Button7.OnClick := @Button7Click;
|
|
|
|
|
|
{ Create a label for the edit field }
|
|
label1 := TLabel.Create(Self);
|
|
label1.Parent := self;
|
|
label1.top := 50;
|
|
label1.left := 320;
|
|
label1.Height := 20;
|
|
label1.Width := 130;
|
|
label1.Show;
|
|
label1.Caption := 'TEdit :';
|
|
|
|
|
|
Edit1 := TEdit.Create (self);
|
|
with Edit1 do
|
|
begin
|
|
Parent := self;
|
|
Left := 500;
|
|
Top := 50;
|
|
Width := 70;
|
|
Height := 20;
|
|
OnChange := @ComboOnChange;
|
|
OnClick := @ComboOnClick;
|
|
Name := 'Edit1';
|
|
Show;
|
|
end;
|
|
|
|
|
|
{ Create a label for the 1st combobox }
|
|
label2 := TLabel.Create(Self);
|
|
label2.Parent := self;
|
|
label2.top := 100;
|
|
label2.left := 320;
|
|
label2.Height := 20;
|
|
label2.Width := 130;
|
|
label2.Enabled:= true;
|
|
label2.Show;
|
|
label2.Caption := 'Combo (unsorted)';
|
|
label2.Enabled:= true;
|
|
|
|
|
|
{ Create the menu now }
|
|
{ WARNING: If you do it after creation of the combo, the menu will not
|
|
appear. Reason is unknown by now!!!!!!}
|
|
mnuMain := TMainMenu.Create(Self);
|
|
Menu := mnuMain;
|
|
itmFile := TMenuItem.Create(Self);
|
|
itmFile.Caption := '&File';
|
|
mnuMain.Items.Add(itmFile);
|
|
itmFileQuit := TMenuItem.Create(Self);
|
|
itmFileQuit.Caption := '&Quit';
|
|
itmFileQuit.OnClick := @mnuQuitClicked;
|
|
itmFile.Add(itmFileQuit);
|
|
|
|
ComboBox1 := TComboBox.Create (self);
|
|
with ComboBox1 do
|
|
begin
|
|
Parent := self;
|
|
Left := 500;
|
|
Top := 100;
|
|
Width := 170;
|
|
Height := 20;
|
|
Style := csDropDown;
|
|
Items.Add ('wohhh!');
|
|
Items.Add ('22222!');
|
|
ItemIndex := 1;
|
|
Items.Add ('33333!');
|
|
Items.Add ('abcde!');
|
|
OnChange := @ComboOnChange;
|
|
OnClick := @ComboOnClick;
|
|
Name := 'ComboBox1';
|
|
Show;
|
|
end;
|
|
|
|
|
|
{ Create a label for the 2nd combobox }
|
|
label3 := TLabel.Create(Self);
|
|
label3.Parent := self;
|
|
label3.top := 150;
|
|
label3.left := 320;
|
|
label3.Height := 20;
|
|
label3.Width := 130;
|
|
label3.Show;
|
|
label3.Caption := 'Combo (sorted)';
|
|
|
|
|
|
ComboBox2 := TComboBox.Create (self);
|
|
with ComboBox2 do
|
|
begin
|
|
Parent := self;
|
|
Left := 500;
|
|
Top := 150;
|
|
Width := 170;
|
|
Height := 20;
|
|
Style := csDropDownList;
|
|
Items.Add ('wohhh!');
|
|
Items.Add ('22222!');
|
|
ItemIndex := 1;
|
|
Items.Add ('33333!');
|
|
Items.Add ('abcde!');
|
|
Name := 'ComboBox2';
|
|
OnChange := @ComboOnChange;
|
|
OnClick := @ComboOnClick;
|
|
Sorted := true;
|
|
Show;
|
|
end;
|
|
|
|
|
|
Memo1 := TMemo.Create(Self);
|
|
with Memo1 do
|
|
begin
|
|
Parent := Self;
|
|
Scrollbars := ssBoth;
|
|
Left := 200;
|
|
Top := 200;
|
|
Width := 335;
|
|
Height := 155;
|
|
Show;
|
|
end;
|
|
|
|
|
|
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.
|
|
|