Here is a list of (major) changes in Qt from 0.96 to 0.98.

As usual, we fixed some bugs and improved the documentation.

*************** Changes that might affect runtime behavior *****************

QWidget:

--------

  setMinimumSize() and setMaximumSize() now force the widget to 

  a legal size.  resize() and setGeometry() obey the widget's

  minimum/maximum size.

  The default behaviour of QWidget::closeEvent is now to hide the widget,

  not to delete it as before (which was potentially dangerous). This means

  that if you have a top level widget and the user closes it via the close

  box, it will now hide itself if you have not reimplemented closeEvent().

  See the QWidget::closeEvent() and QCloseEvent documentation for details.

  (There are other changes in QWidget, see below)

*************** Changes that might generate compile errors *****************

**************           when compiling old code           *****************

Disabled copy constructors and operators=

----------------------------------------- 

  Copy constructors and operators= are disabled in the classes that cannot

  be copied (this includes all classes that inherit from QObject). This

  will let the compiler find bugs in your code, you'll get compile time 

  errors where you most probably would have gotten core dumps before. 

  This change has been done in the following classes:

    QAccel QApplication QBuffer QButton QButtonGroup QCheckBox QClipboard

    QComboBox QConnection QDataStream QDialog QFile QFileDialog QFrame

    QGroupBox QIODevice QImageIO QLCDNumber QLabel QLineEdit QListBox

    QMenuBar QMenuData QMenuItem QMessageBox QMetaObject QObject

    QPSPrinter QPaintDevice QPainter QPicture QPopupMenu QPrintDialog

    QPrinter QPushButton QRadioButton QRangeControl QScrollBar QSignal

    QSocketNotifier QTableView QTextStream QTimer QWidget QWindow

  The other classes all have sensible copy constructors and operators=.

QDate:

------

  These were protected, now private:

	static const char *monthNames[];

 	static const char *weekdayNames[];

	uint  	 jd;

QListBox:

---------

  The internals of QListBox are completely reworked. Definition of custom

  QListBoxItems is now much easier. This is *not* compatible with the old

  way of defining custom QLBItems. See the QListBoxItem documentation for

  details.

QTime:

------

  This was protected, now private:

	uint   ds;

*************** Type changes that might generate warnings: *****************

none

*****************         Obsoleted functions         **********************

none

***************** All other changes from 0.96 to 0.98 **********************

moc:

----

  Moc previously gave a syntax error when the word "class" was found

  in a string outside a class declaration. This bug has now been

  fixed.

  More moc arguments, check the manpage for details.

QFont:

------

  Two new convenience functions; bold() and setBold().

QLabel:

-------

  setMargin() and margin() are new. setMargin() specifies a minimum margin

  when the label contents are justified.

QWidget:

--------

  You can specify a custom widget frame for top level widgets, including

  no frame at all. See the widget constructor doc. for details.

  Qt now has enter and leave events. Reimplement the virtual functions  

  void enterEvent( QEvent * ) and void leaveEvent( QEvent * ) to receive

  events when the mouse cursor leaves or enters the visible part of the

  widget.