[qt-dev] Beta 4 released on 11.11.2009

[Dmitry A. Kuminov]

Hi everybody,

Just for your information, there is a new Beta of Qt4 for OS/2 available. Here
is the list of changes:

Beta 4 (11-11-2009)

Improvements:

- Added sound support (implemented QSound class).

- Added system tray support (QSystemTrayIcon class). This support requires
the Extended system tray XCenter plugin to be installed. See the note above
on how to compile and install this plugin.

- Enabled QPlugin support on OS/2. This in turn enables SVG support for
QIcon (which is built as a Qt plugin DLL by default).

- Better widget modality support (widgets blocked by modality cannot be
activated and moved using the mouse and the title bar anymore).

- Added support for 'console' and 'windows' CONFIG options in .pro files.
Now, if 'windows' is present, the target executable will have the WINDOWAPI
attribute set which effectively makes it a PM application. This, in
particular, disables standard input, output and error streams so that when
started, the application will not have a console window attached to it and
will not support input/output redirection operators on the command line.
By default, 'console' mode is active unless you perform a release build and
the application is linked against the QtGui library ('QT = gui' in .pro),
in which case the default is 'windows'.

- Improved paint speed in Qt windows which should increase overall graphical
UI performance by 10%-20% in Qt4 applications.

- Implemented setting window icons for top-level windows (using
QWidget::setWindowIcon()).

- Added LxLite support to provide compression for executables and DLLs. The
compression is controlled by the 'exepack' CONFIG option which is turned on
by default for release builds if the LxLite executable is present in PATH
during the configure.cmd invocation. The compression may be turned off on a
per-project basis by adding a 'CONFIG -= exepack' line to the .pro file.

- Improved the section of this README.OS2 file that describes how to properly
set the LANG variable to have correct national characters in file names and
in window titles of Qt applications.

Fixes:

- QProcess: The executable's path was not always added to BEGINLIBPATH.

- Fixed-size top-level widgets could not be moved.

- Application crash after pressing a button in a dialog window that resizes
this dialog (for example, makes it bigger to show more information).

- Resizing top level windows using the top border broke mouse coordinates so
that Qt tought you pressed the mouse button in a different place of the
window than where you actually did it.

- Events posted with QCoreApplication::postEvent() were only processed upon
receiving a next message from the system. This caused funny delays such as
controls in a Qt window still indicating the input focus (the dotted
rectangle) after the window was deactivated and losing this indication only
when the mouse pointer was moved over the window.

- Don't replay mouse button press on a push button that is showing a popup
menu but instead hide the popup menu and unpress the button to get more
native look and feel.

- Deactivating the window with a push button showing a popup menu would hide
the popup but leave the button pressed.

- Fixed incorrect Qt dirty widget region calculation when processing WM_PAINT
messages. This fixes a lot of redraw problems (menu items in the main menu
bar, text in combo-boxes, various redraw problems in smplayer when switching
interfaces and going to/from fullscreen, and similar).