http://wiki.freepascal.org/TTDINotebook

=== Contents ===

    1 About
    2 Author
    3 License
    4 Key Features
    5 Download
    6 Dependencies / System Requirements
    7 Screenshot
    8 Installation
    9 How to Use
    10 Methods and Properties
    11 Changelog

=== 1 - About ===

  A Tabbed GUI Interface 

  Lazarus does not have full support for MDI interface yet, and commercial
applications need to open several windows at once without ShowModal.

  However, the MDI interface concept has several problems, which may confuse the
novice user. A more complete study on the advantages and disadvantages of the
MDI can be found at wikipedia:
http://en.wikipedia.org/wiki/Multiple_document_interface#Comparison_with_single_document_interface

  The intention of this component is to provide a simple way to create an TDI
interface, similar to that described in Wikipedia.
http://en.wikipedia.org/wiki/Tabbed_document_interface

  I used TExtendedNotebook as a base component, introducing new methods and
properties to provide support for TDI. Very few changes will be needed in your
code, and component TTDINotebook will handle the entire process of creation and
destruction of the tabs and menus automatically.

=== 2 - Author ===

Author: Daniel Simões de Almeida
daniel@djsystem.com.br

=== 3 - License ===

LGPL
http://www.opensource.org/licenses/lgpl-license.php

=== 4 - Key Features ===

- Automatically takes care of Creation and Destruction of the tabs,
- Automatically takes care of Main Menu Items related to tabs
- Automatically Close the tabs when the Internal Form is Closed or Destroyed
- Allows you to display a background image in a corner of the Form
- Respects the Max Constraint of Internal Forms, centralizing it on the Tab
- Respects the Internal Forms OnCloseQuery event when closing a Tab
- Allows customization of Labels and Images of the Menu Items Tabs
- Allow to close Tabs with Mouse Middle Button
- Allows Close All Tabs
- Runs internal Form OnActivate, OnDeactivate when changing pages

=== 5 - Download ===

  The package can be downloaded from the Lazarus CCR SVN repository.
  https://svn.code.sf.net/p/lazarus-ccr/svn/components/tdi/

You will need a SVN Client

 On Windows you can use TortoiseSVN: http://tortoisesvn.net/downloads.html

 On Linux, use:
 svn co https://svn.code.sf.net/p/lazarus-ccr/svn/components/tdi/

=== 6 - Dependencies / System Requirements ===

    None 

=== 7 - Screenshot ===

http://wiki.freepascal.org/TTDINotebook#Screenshot

=== 8 - Installation ===

- Download the package on a directory of your preference
- Open Package File: tdi.lpk.
- Install the Package and let Lazarus rebuild.

=== 9 - How to Use ===

   Please open Project tdi\Demo\TDIDemo.lpi
   I believe studying the sources and observing the Demo working is the best way
to explain the component

=== 10 - Methods and Properties ===

* procedure ShowFormInPage( AForm: TForm; ImageIndex : Integer = -1 );
  Show a already created Form in a new Page. If there is an Page that already
  owns this Form variable, it will bring it to front, rather than create a new
  Page.

* procedure CreateFormInNewPage( AFormClass: TFormClass; ImageIndex : Integer = -1 ) ;
  Create a New AFormClass, in a new Page.
  ( Remember to assign CloseAction := caFree; on OnClose event of this Form)

* Function CanCloseAPage( APageIndex: Integer): Boolean;
  This will fire OnCloseQuery of the Internal Form reference to a APageIndex Tab,
  and Returns True if it can be Closed.

* Function FindFormInPages( AForm: TForm): Integer ;
  Search an Page that owns AForm variable, returning the TabIndex if found or -1
  if doesn't.

* Function CanCloseAllPages: Boolean;
  The same as above, but will check All Tabs

* procedure ScrollPage( ToForward: Boolean );
  Go to Next ou Prior Page, depending ToForward parameter

* procedure CheckInterface;
  Check the TDI Interface, enabling/disabling internal components (This method
  is called from inside)

* property BackgroundImage : TImage

* property BackgroundCorner : TTDIBackgroundCorner
  TTDIBackgroundCorner = (coTopLeft, coTopRight, coBottomLeft, coBottomRight);

* property MainMenu : TMainMenu
  If Assigned, TTDINotebook will use it to Create Menu Items for Tabs operations
  (see Image1)

* property CloseTabButtom : TTDICloseTabButtom
  TTDICloseTabButtom = (tbNone, tbMenu, tbButtom ) ;
  tbNone - None Close Button is showed
  tbMenu - Use MainMenu, to draw a Close Button aligned to Right (see Image1)
  tbButtom - Draw a small BitButtom, on Right Up corner of TTDINotebook

* property TDIActions : TTDIActions
  Allow to customize Label and Images of Menu Items for operations:
  TabsMenu, CloseTab, CloseAllTabs, NextTab, PreviousTab

* property TDIOptions : TTDIOptions
  TTDIOption = ( tdiMiddleButtomClosePage, tdiRestoreLastActiveControl,
                 tdiVerifyIfCanChangePage ) ;
  TTDIOptions = set of TTDIOption ;

  tdiMiddleButtomClosePage - Close Page with Mouse middle button
  tdiRestoreLastActiveControl - Restore the focus control to the Last focused
                                component on Page, after change to a new Page.
  tdiVerifyIfCanChangePage - Try to fire OnExit event of current focused control
                            on Page before leave it. If isn't possible to change
                            to another control, doesn't change the Page.

* property ShortCutClosePage: TShortCut
  The HotKey to Close a Page, default is Ctrl+F4

* property FixedPages : Integer
  Number of initial Pages that cannot be closed.

=== 11 - ChangeLog ===

[+]: New feature
[*]: Resource modified / improved
[-]: Bug Fix (hopefully)

09/01/2019
[+] Added new Option "tdiEmulateFormOnActivate". If Seted, will fire Internal Form
    OnActivate and OnDeactivate when changing Pages
    (by: DSA)

07/01/2018
[-] Fix compilation for Lazarus 1.9.0 (by: DSA)

03/10/2017
[-] Fix for Closed Buttom Enabled/Disabled detection when Creating and Closing Pages
    Lazarus 1.6. (side effect for commit in 27/09/17)
[+] Added Public method: procedure CloseAllTabs;
    (by: DSA)

27/09/2017
[-] Fix for Method "RestoreLastFocusedControl". Wrong last focused component
    detection
[-] Fix for Closed Buttom Enabled/Disabled detection when Creating and Closing Pages
    Lazarus 1.8
    (by: DSA)

14/11/2013
[-] Better detection for Form Constraint handling on Linux
    (by: DSA and Galló Gábor)

13/07/2013
[+] Added suport to runs Internal Form OnActivate and OnDeactivate when
    changing Pages      (by: DSA)

