Qt 2.2.1 is a maintainance release. It keeps backward binary compatibility

with Qt 2.1 and both forward and backward source compatibility with Qt 2.2.x.

Qt 2.2.0 had a binary compatibility problem with the following:

   bool QRect::contains( const QRect &r, bool proper=FALSE ) const

Qt 2.2.1 corrects this. Programs compiled with 2.1.x now continue

running with 2.2.1. Programs compiled with versions other than 2.2.0

may not run with 2.2.0, so upgrading to 2.2.1 is additionally important.

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*			    General					   *

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- Various compilation problems on particular platforms fixed

- Many improvments in QThread. More platforms supported

  (e.g. HPUX 11.x), uses native threads on Solaris rather than

  compatibility posix threads

- A few newly discovered memory leaks and free memory reads fixed

- As usual, many minor bugfixes, too small to be mentioned here.

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*			   Designer					   *

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- in KDE mode: don't show all KDE widgets in the toolbars, since we do

  not have icons for them (yet). They are accessible through the menu

  structure, though.

- Introduced concept of a global /etc/designerrc and a templatePath

  for the sake of Linux Standard Base (LSB) and the way Linux

  ditributors like to package the Qt Free Edition.

- Support for tab names in a QTabWidget, and page names in a QWizard.

- Support for button IDs in a button group, makes it possible to utilize

  one single slot for all buttons in a group.

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*			   Library					   *

****************************************************************************

QClipboard: 	X11 only: fixed occasional crashes, possibly corrupted

		list of provided types and hangups of several seconds under

		certain circumstances.

QFileDialog:	Fixed update when renaming a file to an existing file

		Unix only: Reset error status after attempting to read an

		empty file

		Fixed magical resetting of the "Open" label

		Fixed duplicate entries in the history combobox

QFont:		Fixes for Hewbrew, Arabic and Thai encodings

		Added support for Ukrainian encodings

		X11 only: loading fonts for a locale other than the

		current now possible (allows displaying japanese characters

		in a latin1 application without relying on the existence of

		a unicode font)

QHeader:	removing labels fixed, important for QTable and QListView

QIconView:	drawing problem with missleading font metrices and

		bounding rectangles fixed

QInputDialog,

QMessageBox:	use the main widget's or parent's icon if available

QLayout:	synchronize the behaviour of sublayouts and subwidgets with

		layouts.

QLineEdit: 	Update cursor position if QValidator::fixup() truncates the

		string

QMainWindow:	Fixed calculated minimum size. Sometimes, the minimum width

		of the central widget was disregarded.

QMenuBar:	Sizing fixed for frameless menubars in toolbars in

		Motif-based styles

QMotifPlusStyle: correct drawing of triangular tabs

QMovie:		keep frameImage() during EndOfMovie signal

QDom:		add comments when reading a xml file into the dom

QPrinter:	MS-Windows only: Fixed invalidation when setup dialog was

		cancelled

QSgiStyle:	Small drawing problem with QTabBar fixed.

		Fixed drawing of special prefix in menu items

QSizePolicy:	setHeightForWidth() was broken, works now

QTextCodec:	significant speedups for latin1 conversion

QTextStream:	small speed improvements for readLine()

		Added codec for ukrainian (koi8-u) encoding

QWheelEvent:	Support for the MSH_MOUSEWHEEL extension on MS-Windows 95

QWidget:	X11 only: Fixed possible mouse lock-ups when re-entering

		the event loop on mouse events for widgets of type

		WType_Popup.

		X11 only: set input context when setting the active

		window

		X11 only: when dialogs were closed, the main window looked

		like it	lost focus with some window managers. This has been

		fixed now.

QWidgetStack:	potential flicker issue fixed

QWorkspace: 	normalize minimized children when they get focus

		removed occasional flashing (e.g. when maximizing child

		windows)

		Look and feel adjustments to emulate MS-Windows even

		closer

		Documented that the active window can be 0 if there is no

		active window

		Slightly modifed the button decorations to be more general

		and less KDE2 specific

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*               Changes that might affect runtime behavior                 *

****************************************************************************

QLayout:

We synchronized the behaviour of sublayouts and subwidgets with

layouts. This shows great effect in the designer, were you usually

operate on container subwidgets in the design phase, but get a

complete layout in the preview mode or the generated code. For

example, the influence of a spacer item on a sublayout's size policy

has been reduced. The modifications may slightly affect the layout of

some dialogs.

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*		    Qt/Embedded-specific changes		           *

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- Rotated displays & fonts

- QCOP, a simple interprocess messaging system

- Threading support

- Auto-detected mouse

- VGA16 support

- Improved thick lines

- Optimize some double-painting

- Allow setting of custom 8bpp colors: QApplication::qwsSetCustomColors()

- Fix masked widget drawing and clicking

- Fix mouse grabbing for popups