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unit ComboBoxFrm;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls, Menus;
type
{ TForm1 }
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
ComboBox1: TComboBox;
ComboBox2: TComboBox;
Edit1: TEdit;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
itmFile: TMenuItem;
itmFileQuit: TMenuItem;
mnuMain: TMainMenu;
Memo1: TMemo;
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);
procedure itmFileQuitClick(Sender: TObject);
private
public
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
{ TForm1 }
procedure TForm1.Button1Click(Sender: TObject);
begin
if Assigned(ComboBox1) and Assigned(Edit1) then
ComboBox1.Text := Edit1.Text;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
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: string;
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: string;
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.itmFileQuitClick(Sender: TObject);
begin
Close;
end;
end.
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