Here is a list of (major) changes in Qt from 0.92 to 0.93.+
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Bug-fixes, optimizations and much improved documentation, of course.+
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There are not many changes in the API interface.+
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Here's a list of the most important changes.+
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QApplication:+
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  setCursor(), restoreCursor() now uses a stack of cursors.+
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  quit() is now a slot.+
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  exit() replaces the old static quit() function.+
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QColor:+
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  New constructor that makes you set an RGB or HSV color directly,+
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    like this: QColor(320, 255, 240, QColor::Hsv)+
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QObject:+
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  Has now a timerEvent(), which was moved from QWidget.+
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  Compatible with old code.+
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QPainter:+
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  GC caching (internal optimization) makes drawing very fast.+
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  drawShade* obsolete, moved to qdrawutl.h and renamed to qDrawShade*+
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    - These are now global functions that take QPainter * and QColorGroup+
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    - Added qDrawWinPanel and qDrawWinButton for Windows 95 look+
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    - Added qDrawPlainRect+
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QPixmap:+
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  New fill() function that fills the pixmap with the background color+
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    OR background pixmap of a widget.+
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QRect:+
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  fixup() renamed to normalize(), returns a new QRect.+
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QWidget:+
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  New function setCaption(), setIcon() and setIconText(), moved from QWindow.+
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New classes:+
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  QSocketNotifier, makes it possible to write async socket code.+
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New global functions:+
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  qInstallMsgHandler() and qRound(), in qglobal.h.+
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moc:+
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  Supports templates.+
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Documentation:+
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  A tutorial.+
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  Template classes (QArray, QList etc.) are documented.+
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  Many more links in the examples.+
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  Postscript documentation (around 400 pages).+
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