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[wxWidgets.git] / docs / changes.txt

wxWindows 2 Change Log
----------------------

INCOMPATIBLE CHANGES SINCE 2.2.x
================================

    Please take a few minutes to read the following list, especially
    paying attention to the most important changes which are marked
    with '!' in the first column.

    Also please note that you should ensure that WXWIN_COMPATIBILITY_2_2
    is defined to 1 if you wish to retain maximal compatibility with 2.2
    series -- however you are also strongly encouraged to try to compile
    your code without this define as it won't be default any longer in
    2.6 release.


wxBase:

! wxArray<T>::Remove(size_t) has been removed to fix compilation problems
  under 64 bit architectures, please replace it with RemoveAt() in your
  code.

! wxArray<T> macros have been changed to fix runtime problems under 64 bit
  architectures and as a side effect of this WX_DEFINE_ARRAY() can only be
  used now for the pointer types, WX_DEFINE_ARRAY_INT should be used for the
  arrays containing non-pointers.

- wxObject::CopyObject() and Clone() methods were removed because they
  simply don't make sense for all objects

- wxEvent now has a pure virtual Clone() method which must be implemented
  by all derived classes, if you have user-defined event classes please
  add "wxEvent *Clone() const { return new MyEvent(*this); }" line to them

- small change to wxStopWatch::Pause() semantics, please see the documentation

- unlikely but possible incompatibility: the definition of TRUE has changed
  from "1" to "(bool)1" (and the same thing for FALSE), so the code which
  could be erroneously compiled previously such as doing "return FALSE" from
  a function returning a pointer would stop compiling now (but this change
  is not supposed to have any effects on valid code)

- another minor change: wxApp::OnAssert() has a new "cond" argument, you
  must modify YourApp::OnAssert() signature if you were using it to override
  the default assert handling.


All (GUI):

! the event type constants are not constants any more but are dynamically
  allocated during run-time which means that they can't be used as case labels
  in the switch()es, you must rewrite them to use if()s instead

  You may also define WXWIN_COMPATIBILITY_EVENT_TYPES to get the old behaviour
  but this is strongly discouraged, please consider changing your code
  instead!

! wxDialog does not derive from wxPanel any longer - if you were using it in
  your code, please update it. The quick fix for the most cases is to replace
  the occurrences of wxPanel with wxWindow.

! if you handle (and don't skip) EVT_KEY_DOWN, the EVT_CHAR event is not
  generated at all, so you must call event.Skip() in your OnKeyDown() if
  you want to get OnChar() as well

- wxYES_NO is now wxYES | wxNO and the manifest values of both wxYES and wxNO
  have changed (to fix some unfortunate clashes), please check your code to
  ensure that no tests for wxYES or wxNO are broken: for example, the following
  will *NOT* work any longer:

        if ( flags & wxYES_NO )
                ... do something ...
        if ( flags & wxYES )
                ... do something else ...

- wxGLCanvas now derives directly from wxWindow, not wxScrolledWindow

- wxGridCellAttrProvider class API changed, you will need to update your code
  if you derived any classes from it

- wxImage::ComputeHistogram()'s signature changed to 
  unsigned long ComputeHistogram(wxImageHistogram&) const

- wxEvtHandler cannot be copied/assigned any longer - this never worked but
  now it results in compile-time error instead of run-time crashes

- WXK_NUMLOCK and WXK_SCROLL keys no longer result in EVT_CHAR() events,
  they only generate EVT_KEY_DOWN/UP() ones

- the dialogs use wxApp::GetTopWindow() as the parent implicitly if the
  parent specified is NULL, use wxDIALOG_NO_PARENT style to prevent this
  from happening

- several obsolete synonyms are only retained in WXWIN_COMPATIBILITY_2_2 mode:
  for example, use wxScrolledWindow::GetViewStart() now instead of ViewStart()
  and GetCount() instead of Number() in many classes


wxMSW:

! build system changed: setup.h is not a static file in include/wx any more
  but is created as part of the build process under lib/<toolkit>/wx/include
  where <toolkit> is of the form (msw|univ)[dll][u][d]. You'll need to update
  the include path in your make/project files appropriately. Furthermore,
  xpm.lib is no longer used by wxMSW, it was superseded by the wxXPMDecoder
  class. You'll need to remove all references to xpm.lib from your 
  make/project files.

- child frames appear in the taskbar by default now, use wxFRAME_NO_TASKBAR
  style to avoid it

- all overloads of wxDC::SetClippingRegion() combine the given region with the
  previously selected one instead of replacing it

- wxGetHomeDir() uses HOME environment variable and if it is set will not
  return the programs directory any longer but its value (this function has
  never been meant to return the programs directory anyhow)

- wxHTML apps don't need to include wx/html/msw/wxhtml.rc in resources file
  anymore. The file was removed from wxMSW


Unix ports:

! You should use `wx-config --cxxflags` in your makefiles instead of
  `wx-config --cflags` for compiling C++ files. CXXFLAGS contains CFLAGS
  and the compiler flags for C++ files only, CFLAGS should still be used
  to compile pure C files.


wxThread and related classes:

- The thread-related classes have been heavily changed since 2.2.x versions
  as the old code had many serious problems. This could have resulted in
  semantical changes other than those mentioned here, please review use of
  wxThread, wxMutex and wxCondition classes in your code.

! wxCondition now *must* be used with a mutex, please read the (updated) class
  documentation for details and revise your code accordingly: this change was
  unfortunately needed as it was impossible to ensure the correct behaviour
  (i.e. absense of race conditions) using the old API.

- wxMutex is not recursive any more in POSIX implementation (it hasn't been
  recursive in 2.2.x but was in 2.3.1 and 2.3.2), please refer to the class
  documentation for the discussion of the recursive mutexes.

- wxMutex::IsLocked() doesn't exist any more and should have never existed:
  this is was unique example of a thread-unsafe-by-design method.


OTHER CHANGES
=============

2.3.3
-----

wxBase:

- wxSemaphore class added, many fixed to wxCondition and wxThread (K.S. Sreeram)
- fixes to the command line parsing error and usage messages
- modified wxFileName::CreateTempFileName() to open the file atomically
  (if possible) and, especially, not to leak the file descriptors under Unix
- memory leak in wxHTTP fixed (Dimitri)
- fixes to AM_PATH_WXCONFIG autoconf macro
- added wxHashMap class that replaces type-unsafe wxHashTable and is modelled
  after (non standard) STL hash_map
- wxLocale now works in Unicode mode
- wxLocale can now load message catalogs in arbitrary encoding
- fixed the bug related to the redrawing on resize introduced in 2.3.2
- added static wxFontMapper::Get() accessor (use of wxTheFontMapper is now
  deprecated)
- added wxShutdown() function (Marco Cavallini)

Unix (Base/GUI):

- wxWindows may be built using BSD and Solaris (and possibly other) make
  programs and not only GNU make
- wxTCP-based IPC classes now support communicating over Unix domain sockets
- wxWindows may be built as a dynamic shared library under Darwin / Mac OS X
  lazy linking issues have been solved by linking a single module (.o) into
  the shared library (two step link using distrib/mac/shared-ld-sh)
- fixed thread priority setting under Linux

All (GUI):

- it is now possible to set the icons of different sizes for frames (e.g. a
  small and big ones) using the new wxIconBundle class
- implemented radio menu items and radio toolbar buttons
- added possibility to show text in the toolbar buttons
- added wxArtProvider class that can be used to customize the look of standard
  wxWindows dialogs
- significantly improved native font support
- wxImage::ComputeHistogram() now uses wxImageHistogram instead of type-unsafe
  wxHashTable
- added IFF image handler
- fixed using custom renderers in wxGrid which was broken in 2.3.2
- support for multiple images in one file added to wxImage (TIFF, GIF and ICO formats)
- support for CUR and ANI files in wxImage added (Chris Elliott)
- wxTextCtrl::GetRange() added
- added wxGetFontFromUser() convenience function
- added EVT_MENU_OPEN and EVT_MENU_CLOSE events
- added Hungarian translations (Janos Vegh)
- added wxImage::SaveFile(filename) method (Chris Elliott)
- added wxImage::FloodFill and implemented wxWindowDC::DoFloodFill method
  for GTK+, Mac, MGL, X11, Motif ports (Chris Elliott)
- added (platform-dependent) scan code to wxKeyEvent (Bryce Denney)
- added wxTextCtrl::EmulateKeyPress()
- Added wxMouseCaptureChangedEvent
- Added custom character filtering to wxTextValidator
- wxTreeCtrl now supports incremental keyboard search
- wxHelpProvider::RemoveHelp added and called from ~wxWindowBase
  so that erroneous help strings are no longer found as the hash
  table fills up

wxMSW:

- small appearance fixes for native look under Windows XP
- refresh the buttons properly when the window is resized (Hans Van Leemputten)
- huge (40*) speed up in wxMask::Create()
- changing wxWindows styles also changes the underlying Windows window style
- wxTreeCtrl supports wxTR_HIDE_ROOT style (George Policello)
- fixed flicker in wxTreeCtrl::SetItemXXX()
- fixed redraw problems in dynamically resized wxStaticText
- improvements to wxWindows applications behaviour when the system colours
  are changed
- fixed wxProgressDialog for ranges > 65535
- wxSpinButton and wxSpinCtrl now support full 32 bit range (if the version
  of comctl32.dll installed on the system supports it)
- wxFontEnumerator now returns all fonts, not only TrueType ones
- bugs in handling wxFrame styles (border/caption related) fixed
- showing a dialog from EVT_RADIOBUTTON handler doesn't lead to an infinite
  recursion any more
- wxTextCtrl with wxTE_RICH flag scrolls to the end when text is appended to it
- the separators are not seen behind the controls added to the toolbar any more
- wxLB_SORT style can be used with wxCheckListBox
- wxWindowDC and wxClientDC::GetSize() works correctly now
- Added wxTB_NODIVIDER and wxTB_NOALIGN so native toolbar can be used in FL
- Multiline labels in buttons are now supoprted (simply use "\n" in the label)
- Implemented wxMouseCaptureChangedEvent and made wxGenericDragImage check it
  has the capture before release it.
- fixed bugs in multiple selection wxCheckListBox
- default button handling is now closer to expected
- setting tooltips for wxSlider now works
- multiple events avoided in wxComboBox
- tooltip asserts avoided for read-only wxComboBox
- fixed a race condition during a thread exit and a join
- fixed a condition where a thread can hang during
  message/event processing

wxGTK:

- wxDirDialog now presents the file system in standard Unix way
- wxButton now honours wxBU_EXACTFIT
- wxStaticBox now honours wxALIGN_XXX styles
- added support for non alphanumeric simple character accelerators ('-', '=')
- new behaviour for wxWindow::Refresh() as it now produces a delayed refresh. 
  Call the new wxWindow::Update() to force an immediate update
- support for more SGI hardware (12-bit mode among others)
- fixed wxDC::Blit() to honour source DC's logical coordinates
- implemented wxIdleEvent::RequestMore() for simple background tasks
- implemented wxChoice::Delete()
- fixed bad memory leak in wxFileDialog (Chris Elliott)
- made internal GC pool dynamically growable

wxHTML:

- fixed wxHtmlHelpController's cache files handling on big endian machines
- added blocking and redirecting capabilities to wxHtmlWindow via
  wxHtmlWindow::OnOpeningURL()
- fixed alignment handling in tables
- fixed <font face="..."> handling to be case insensitive

2.3.2
-----

New port: wxUniv for Win32/GTK+ is now included in the distribution.

wxBase:

- wxRegEx class added
- wxGetDiskSpace() function added (Jonothan Farr, Markus Fieber)
- wxTextBuffer and wxTextFile(wxStream) added (Morten Hanssen)
- more fixes to wxMBConv classes. Conversion to and from wchar_t now works with
  glibc 2.2 as well as with glibc 2.1. Unix version now checks for iconv()'s
  capabilities at runtime instead of in the configure script.

All (GUI):

- support for virtual list control added
- column images in report mode of the list control
- wxFindReplaceDialog added (based on work of Markus Greither)
- wxTextCtrl::SetMaxLength() added (wxMSW/wxGTK)
- polygon support in wxRegion (Klaas Holwerda)
- wxStreamToTextRedirector to allow easily redirect cout to wxTextCtrl added
- fixed bug with using wxExecute() to capture huge amounts of output