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

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

recompiled to work with Qt 2.0.

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

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

Reference Documentation for information on how to port an existing

Qt 1.x-based program to Qt 2.0.

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* 			     New classes				   *

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* Support for generalized configrable styles:

    QStyle and subclasses

* Support for international software development:

    QTranslator and the QObject::tr() function

    QTextCodec (and subclasses)

    QString - a Unicode string

    QChar - a Unicode character

* Convenient and powerful new collection classes:

    QMap<Key,Type> - QDict with arbitrary keys

    QValueList<Type> - QList of types other than pointers

    QStringList - QValueList<QString> with helper functions

* Dialogs

    QColorDialog - user picks a color

    QFontDialog - user picks a font

    QWizard - framework for leading users through steps

* Layout

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

    QHGroupBox/QVGroupBox - easy framed groups of widgets

* PNG Support

    PNG support is always compiled into Qt

* Rich Text

    QTextView - formatted text and images

    QTextBrowser - navigate formatted text and images

    QStyleSheet - define your own XML formatting tags

    QSimpleRichText - display rixh text anywhere

* Session management

    QSessionManager - safe state when system shuts down

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* 	              Major changes in existing classes			   *

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QString is now 16-bit Unicode. 

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