Project Structure

• FrameTab.dpr
• TabForm.pas
• Frame2u.pas
• Frame3u.pas
• TabForm.dfm
• Frame2u.dfm
• Frame3u.dfm

program FrameTab;

uses
  Forms,
  TabForm in 'TabForm.pas' {Form1},
  Frame2u in 'Frame2u.pas' {Frame2: TFrame},
  Frame3u in 'Frame3u.pas' {Frame3: TFrame};

{$R *.RES}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.

unit TabForm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  Frame2u, Frame3u, StdCtrls, ComCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Tab: TTabControl;
    procedure TabChange(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    procedure ShowFrame (FrameName: string);
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

type
  TFrameClass = class of TFrame;

procedure TForm1.ShowFrame(FrameName: string);
var
  Frame: TFrame;
  FrameClass: TFrameClass;
begin
  Frame := FindComponent (FrameName + '1') as TFrame;
  if not Assigned (Frame) then
  begin
    FrameClass := TFrameClass (FindClass ('T' + FrameName));
    Frame := FrameClass.Create (Self);
    Frame.Parent := Tab;
    Frame.Visible := True;
    Frame.Name := FrameName + '1';
  end;
  Frame.BringToFront;
end;

procedure TForm1.TabChange(Sender: TObject);
begin
  ShowFrame (Tab.Tabs [Tab.TabIndex]);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  ShowFrame (Tab.Tabs [Tab.TabIndex]);
end;

end.

unit Frame2u;

interface

uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TFrame2 = class(TFrame)
    CheckBox1: TCheckBox;
    CheckBox2: TCheckBox;
    CheckBox3: TCheckBox;
    CheckBox4: TCheckBox;
    CheckBox5: TCheckBox;
    Button1: TButton;
    Button2: TButton;
  private
    { Private declarations }
  public
    { Public declarations }
  end;

implementation

{$R *.DFM}

initialization
  RegisterClass (TFrame2);

end.

unit Frame3u;

interface

uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TFrame3 = class(TFrame)
    ListBox1: TListBox;
    btnAdd: TButton;
    btnDelete: TButton;
    LabelFile: TLabel;
    Label1: TLabel;
    btnSave: TButton;
    procedure btnAddClick(Sender: TObject);
    procedure btnDeleteClick(Sender: TObject);
    procedure btnSaveClick(Sender: TObject);
  private
    { Private declarations }
  public
    procedure CreateWnd; override;
  end;

implementation

{$R *.DFM}

procedure TFrame3.btnAddClick(Sender: TObject);
var
  strNew: string;
begin
  if InputQuery ('Enter new item', 'Text', strNew) then
    ListBox1.Items.Add (strNew);
end;

procedure TFrame3.btnDeleteClick(Sender: TObject);
begin
  if ListBox1.ItemIndex >= 0 then
    ListBox1.Items.Delete (ListBox1.ItemIndex);
end;

procedure TFrame3.CreateWnd;
begin
  inherited;
  // load data
  ListBox1.Items.LoadFromFile (LabelFile.Caption);
end;

procedure TFrame3.btnSaveClick(Sender: TObject);
begin
  ListBox1.Items.SaveToFile (LabelFile.Caption);
end;

initialization
  RegisterClass (TFrame3);

end.

object Form1: TForm1
  Left = 213
  Top = 186
  Width = 380
  Height = 357
  Caption = 'Frame Pages'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 194
    Top = 297
    Width = 75
    Height = 25
    Anchors = [akRight, akBottom]
    Caption = 'Button1'
    TabOrder = 0
  end
  object Button2: TButton
    Left = 282
    Top = 297
    Width = 75
    Height = 25
    Anchors = [akRight, akBottom]
    Caption = 'Button2'
    TabOrder = 1
  end
  object Tab: TTabControl
    Left = 0
    Top = 0
    Width = 372
    Height = 283
    Anchors = [akLeft, akTop, akRight, akBottom]
    TabOrder = 2
    Tabs.Strings = (
      'Frame2'
      'Frame3')
    TabIndex = 0
    OnChange = TabChange
  end
end

object Frame2: TFrame2
  Left = 0
  Top = 0
  Width = 443
  Height = 277
  Align = alClient
  TabOrder = 0
  object CheckBox1: TCheckBox
    Left = 24
    Top = 24
    Width = 97
    Height = 17
    Caption = 'CheckBox1'
    TabOrder = 0
  end
  object CheckBox2: TCheckBox
    Left = 24
    Top = 56
    Width = 97
    Height = 17
    Caption = 'CheckBox2'
    TabOrder = 1
  end
  object CheckBox3: TCheckBox
    Left = 24
    Top = 88
    Width = 97
    Height = 17
    Caption = 'CheckBox3'
    TabOrder = 2
  end
  object CheckBox4: TCheckBox
    Left = 24
    Top = 120
    Width = 97
    Height = 17
    Caption = 'CheckBox4'
    TabOrder = 3
  end
  object CheckBox5: TCheckBox
    Left = 24
    Top = 152
    Width = 97
    Height = 17
    Caption = 'CheckBox5'
    TabOrder = 4
  end
  object Button1: TButton
    Left = 168
    Top = 32
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 5
  end
  object Button2: TButton
    Left = 168
    Top = 72
    Width = 75
    Height = 25
    Caption = 'Button2'
    TabOrder = 6
  end
end

object Frame3: TFrame3
  Left = 0
  Top = 0
  Width = 443
  Height = 277
  Align = alClient
  TabOrder = 0
  object LabelFile: TLabel
    Left = 40
    Top = 16
    Width = 39
    Height = 13
    Caption = 'List.txt'
    Font.Charset = DEFAULT_CHARSET
    Font.Color = clWindowText
    Font.Height = -11
    Font.Name = 'MS Sans Serif'
    Font.Style = [fsBold]
    ParentFont = False
  end
  object Label1: TLabel
    Left = 16
    Top = 16
    Width = 19
    Height = 13
    Caption = 'File:'
  end
  object ListBox1: TListBox
    Left = 16
    Top = 32
    Width = 169
    Height = 209
    ItemHeight = 13
    TabOrder = 0
  end
  object btnAdd: TButton
    Left = 200
    Top = 32
    Width = 75
    Height = 25
    Caption = '&Add'
    TabOrder = 1
    OnClick = btnAddClick
  end
  object btnDelete: TButton
    Left = 200
    Top = 64
    Width = 75
    Height = 25
    Caption = '&Delete'
    TabOrder = 2
    OnClick = btnDeleteClick
  end
  object btnSave: TButton
    Left = 200
    Top = 96
    Width = 75
    Height = 25
    Caption = '&Save'
    TabOrder = 3
    OnClick = btnSaveClick
  end
end