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. **************************************************************************** * New classes * **************************************************************************** * 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 - QDict with arbitrary keys QValueList - QList of types other than pointers QStringList - QValueList 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 **************************************************************************** * Major changes in existing classes * **************************************************************************** QString is now 16-bit Unicode. QPoint, QPointArray, QSize and QRect now have 32-bit coordinates.