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Qt 2.0 introduces a wide range of major new features as well as
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substantial improvements over the 1.x series. The documentation has
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been significally extended and improved.
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This file will only give an overview of the main changes since version
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1.44. A complete list would simply be too large to be useful. For
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more detail see the online documentation which is included in this
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distribution, and also available on http://qt.nokia.com/doc/
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The Qt version 2.x series is not binary compatible with the 1.x
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series. This means programs compiled with Qt version 1.x must be
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recompiled to work with Qt 2.0.
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Qt 2.0 is mostly, but not completely, source compatible with Qt 1.x.
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See the document "Porting from Qt 1.x to Qt 2.0" in the Online
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Reference Documentation for information on how to port an existing Qt
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1.x-based program to Qt 2.0. Note in particular the automatic porting
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script included - it does a lot of the work for you.
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As for 1.x, the API and functionality of Qt is completely portable
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between Microsoft Windows and X11. And between Windows 95, 98 and NT:
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Unlike most toolkits, Qt lets a single executable work on all three.
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****************************************************************************
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* New major features *
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****************************************************************************
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* Support for international software development:
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QTranslator and the QObject::tr() function
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QTextCodec (and subclasses)
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QString is now a 16-bit Unicode string with good support for
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legacy 8-bit interoperation. (The old 8-bit string class
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from Qt 1.x has been renamed to QCString.)
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QChar - a Unicode character
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* Rich Text
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QTextView - formatted text and images
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QTextBrowser - navigate formatted text and images
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QStyleSheet - define your own XML formatting tags
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QSimpleRichText - display rich text anywhere
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* Convenient and powerful new collection classes:
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QMap<Key,Type> - QDict with arbitrary keys
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QValueList<Type> - QList of types other than pointers
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QStringList - QValueList<QString> with helper functions
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* Dialogs
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QColorDialog - user picks a color
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QFontDialog - user picks a font
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QWizard - framework for leading users through steps
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* Layout
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QGrid/QHBox/QVBox - grid and boxes of widgets automatically assembled
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QHGroupBox/QVGroupBox - easy framed groups of widgets
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QSizePolicy - a widget's abilities to change size in different ways
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* Custom layouts
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New, much simpler and more powerful API for creating custom layouts
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* PNG Support
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PNG support is now included in the core library
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* Support for generalized configurable GUI styles:
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QStyle and subclasses
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* Session management
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QSessionManager - saving state when the system shuts down
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* Extended coordinate system
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QPoint, QPointArray, QSize and QRect now have 32-bit coordinates
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* Cleaner namespace
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Global functions, enums and macros now either start with a 'q' or
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have been moved into the new namespace class "Qt"
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****************************************************************************
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* List of removed classes *
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****************************************************************************
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* QGManager
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Use the new custom layout API.
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* QPointVal, QPointData
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Use QPoint.
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* QUrlDrag
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Changed to QUriDrag
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* QWindow
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Use QWidget
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****************************************************************************
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* List of new classes *
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****************************************************************************
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* QCDEStyle
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* QChar
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* QColorDialog
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* QCommonStyle
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* QConstString
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* QCString
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* QDragEnterEvent
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* QDragLeaveEvent
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* QDropSite
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* QFontDialog
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* QGLayoutIterator
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* QGrid
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* QHBox
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* QHButtonGroup
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* QHGroupBox
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* QHideEvent
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* QLayoutItem
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* QLayoutIterator
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* QMimeSource
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* QMimeSourceFactory
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* QMotifStyle
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* QPlatinumStyle
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* QSessionManager
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* QShowEvent
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* QSimpleRichText
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* QSizeGrip
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* QSizePolicy
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* QSortedList
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* QSpacerItem
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* QStringList
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* QStyle
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* QStyleSheet
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* QStyleSheetItem
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* Qt
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* QTab
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* QTabWidget
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* QTextBrowser
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* QTextCodec
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* QTextDecoder
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* QTextEncoder
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* QTextIStream
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* QTextOStream
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* QTextView
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* QTranslator
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* QUriDrag
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* QVBox
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* QVButtonGroup
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* QVGroupBox
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* QWheelEvent
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* QWidgetItem
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* QWindowsStyle
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* QWizard
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For details, see e.g http://qt.nokia.com/doc/qcdestyle.html (or any
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other class name, lowercased).
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