Qt 2.0 introduces a wide range of major new features as well as substantial improvements over the 1.x series. The documentation has been significally extended and improved. This file will only give an overview of the main changes since version 1.44. A complete list would simply be too large to be useful. For more detail see the online documentation which is included in this distribution, and also available on http://qt.nokia.com/doc/ 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. Note in particular the automatic porting script included - it does a lot of the work for you. As for 1.x, the API and functionality of Qt is completely portable between Microsoft Windows and X11. And between Windows 95, 98 and NT: Unlike most toolkits, Qt lets a single executable work on all three. **************************************************************************** * New major features * **************************************************************************** * Support for international software development: QTranslator and the QObject::tr() function QTextCodec (and subclasses) QString is now a 16-bit Unicode string with good support for legacy 8-bit interoperation. (The old 8-bit string class from Qt 1.x has been renamed to QCString.) QChar - a Unicode character * Rich Text QTextView - formatted text and images QTextBrowser - navigate formatted text and images QStyleSheet - define your own XML formatting tags QSimpleRichText - display rich text anywhere * 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 QSizePolicy - a widget's abilities to change size in different ways * Custom layouts New, much simpler and more powerful API for creating custom layouts * PNG Support PNG support is now included in the core library * Support for generalized configurable GUI styles: QStyle and subclasses * Session management QSessionManager - saving state when the system shuts down * Extended coordinate system QPoint, QPointArray, QSize and QRect now have 32-bit coordinates * Cleaner namespace Global functions, enums and macros now either start with a 'q' or have been moved into the new namespace class "Qt" **************************************************************************** * List of removed classes * **************************************************************************** * QGManager Use the new custom layout API. * QPointVal, QPointData Use QPoint. * QUrlDrag Changed to QUriDrag * QWindow Use QWidget **************************************************************************** * List of new classes * **************************************************************************** * QCDEStyle * QChar * QColorDialog * QCommonStyle * QConstString * QCString * QDragEnterEvent * QDragLeaveEvent * QDropSite * QFontDialog * QGLayoutIterator * QGrid * QHBox * QHButtonGroup * QHGroupBox * QHideEvent * QLayoutItem * QLayoutIterator * QMimeSource * QMimeSourceFactory * QMotifStyle * QPlatinumStyle * QSessionManager * QShowEvent * QSimpleRichText * QSizeGrip * QSizePolicy * QSortedList * QSpacerItem * QStringList * QStyle * QStyleSheet * QStyleSheetItem * Qt * QTab * QTabWidget * QTextBrowser * QTextCodec * QTextDecoder * QTextEncoder * QTextIStream * QTextOStream * QTextView * QTranslator * QUriDrag * QVBox * QVButtonGroup * QVGroupBox * QWheelEvent * QWidgetItem * QWindowsStyle * QWizard For details, see e.g http://qt.nokia.com/doc/qcdestyle.html (or any other class name, lowercased).