1 

     2 The Qt version 2.x series is not binary compatible with the 1.x

     3 series. This means programs compiled with Qt version 1.x must be

     4 recompiled to work with Qt 2.0.

     5 

     6 Qt 2.0 is mostly, but not completely, source compatible with Qt 1.x.

     7 See the document "Porting from Qt 1.x to Qt 2.0" in the Online

     8 Reference Documentation for information on how to port an existing

     9 Qt 1.x-based program to Qt 2.0.

    10 

    11 

    12 ****************************************************************************

    13 * 			     New classes				   *

    14 ****************************************************************************

    15 

    16 

    17 * Support for generalized configrable styles:

    18 

    19     QStyle and subclasses

    20 

    21 * Support for international software development:

    22 

    23     QTranslator and the QObject::tr() function

    24     QTextCodec (and subclasses)

    25     QString - a Unicode string

    26     QChar - a Unicode character

    27 

    28 * Convenient and powerful new collection classes:

    29     QMap<Key,Type> - QDict with arbitrary keys

    30     QValueList<Type> - QList of types other than pointers

    31     QStringList - QValueList<QString> with helper functions

    32 

    33 * Dialogs

    34     QColorDialog - user picks a color

    35     QFontDialog - user picks a font

    36     QWizard - framework for leading users through steps

    37 

    38 * Layout

    39     QGrid/QHBox/QVBox - grid and boxes of widgets automatically assembled

    40     QHGroupBox/QVGroupBox - easy framed groups of widgets

    41 

    42 * PNG Support

    43     PNG support is always compiled into Qt

    44 

    45 * Rich Text

    46     QTextView - formatted text and images

    47     QTextBrowser - navigate formatted text and images

    48     QStyleSheet - define your own XML formatting tags

    49     QSimpleRichText - display rixh text anywhere

    50 

    51 * Session management

    52     QSessionManager - safe state when system shuts down

    53 

    54 

    55 ****************************************************************************

    56 * 	              Major changes in existing classes			   *

    57 ****************************************************************************

    58 

    59 QString is now 16-bit Unicode. 

    60 

    61 QPoint, QPointArray, QSize and QRect now have 32-bit coordinates.