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804 lines
46 KiB
804 lines
46 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/porting3.doc:36 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Porting to Qt 3.x</title>
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--></style>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Annotated</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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<font color="#004faf">Functions</font></a>
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</td>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Porting to Qt 3.x</h1>
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<p> This document describes porting applications from Qt 2.x to Qt 3.x.
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<p> The Qt 3.x series is not binary compatible with the 2.x series. This
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means programs compiled for Qt 2.x must be recompiled to work with Qt
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3.x. Qt 3.x is also not completely <em>source</em> compatible with 2.x,
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however all points of incompatibility cause compiler errors or
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run-time messages (rather than mysterious results). Qt 3.x includes
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many additional features and discards obsolete functionality. Porting
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from Qt 2.x to Qt 3.x is straightforward, and once completed makes
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the considerable additional power and flexibility of Qt 3.x available
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for use in your applications.
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<p> To port code from Qt 2.x to Qt 3.x:
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<p> <ol type=1>
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<p> <li> Briefly read the porting notes below to get an idea of what to expect.
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<li> Be sure your code compiles and runs well on all your target platforms
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with Qt 2.x.
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<li> Recompile with Qt 3.x. For each error, search below for related
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identifiers (e.g. function names, class names). This document
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mentions all relevant identifiers to help you get the information
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you need at the cost of being a little verbose.
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<li> If you get stuck, ask on the <a href="http://qt-interest.trolltech.com/">qt-interest</a> mailing list, or Trolltech Technical Support if
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you're a registered licensee.
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<p> </ol>
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<p> Table of contents:
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<p> <!-- toc -->
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<ul>
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<li><a href="#1"> Link Errors on Windows
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</a>
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<li><a href="#2"> Header file inclusion changes
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</a>
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<li><a href="#3"> Namespace
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</a>
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<li><a href="#4"> Removed Functions
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</a>
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<li><a href="#5"> Obsoleted Functions
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</a>
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<li><a href="#6"> Collection Class Renaming
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</a>
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<li><a href="#7"> QButtonGroup
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</a>
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<li><a href="#8"> QDate
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</a>
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<li><a href="#9"> QFileDialog
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</a>
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<li><a href="#10"> QFont
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</a>
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<li><a href="#11"> QInputDialog
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</a>
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<li><a href="#12"> QLayout and Other Abstract Layout Classes
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</a>
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<li><a href="#13"> QListViewItem
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</a>
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<li><a href="#14"> QMoveEvent
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</a>
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<li><a href="#15"> QMultiLineEdit
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</a>
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<li><a href="#16"> QPrinter
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</a>
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<li><a href="#17"> QRegExp
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</a>
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<ul>
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<li><a href="#17-1"> New special characters
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</a>
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<li><a href="#17-2"> QRegExp::operator=()
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</a>
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<li><a href="#17-3"> QRegExp::match()
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</a>
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<li><a href="#17-4"> QRegExp::find()
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</a>
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<li><a href="#17-5"> QString::findRev() and QString::contains()
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</a>
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<li><a href="#17-6"> QString::replace()
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</a>
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</ul>
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<li><a href="#18"> QSemiModal
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</a>
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<li><a href="#19"> QSortedList
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</a>
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<li><a href="#20"> QTableView
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</a>
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<li><a href="#21"> QToolButton
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</a>
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<li><a href="#22"> QTextStream
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</a>
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<li><a href="#23"> QTranslator
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</a>
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<li><a href="#24"> QWidget
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</a>
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<li><a href="#25"> QXml Classes
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</a>
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<ul>
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<li><a href="#25-1"> QXmlInputSource
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</a>
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<li><a href="#25-2"> QXmlLocator
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</a>
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</ul>
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<li><a href="#26"> Asynchronous I/O Classes
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</a>
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<li><a href="#27"> Transparent widgets
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</a>
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<li><a href="#28"> Bezier Curves
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</a>
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<li><a href="#29"> Locale-aware String Comparisons in QIconView, QListBox,
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QListView and QTable
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</a>
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</ul>
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<!-- endtoc -->
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<p> <a name="Linkerrors"></a>
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<h2> Link Errors on Windows
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</h2>
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<a name="1"></a><p> On Windows, originally in Qt 2.x, the default configuration of the Qt
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library is static. If you just use the default configuration you
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don't need to set certain preprocessor defines. In Qt 3.0, the
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default configuration of the Qt library is to build it as a shared
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library, therefore the preprocessor define <tt>QT_DLL</tt> is needed.
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<p> If you use tmake with Qt 2.x, and now use qmake with Qt 3.x, then the
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cause of the problem is with the project file. In the project file,
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there is usually line that looks like:
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<p> <tt>CONFIG</tt> = ...
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<p> this should be changed to
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<p> <tt>CONFIG</tt> += ...
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<p> so that qmake can look at the configuration that Qt was built with and
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set any relevant preprocessor defines in the makefile.
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<p> <a name="Headers"></a>
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<h2> Header file inclusion changes
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</h2>
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<a name="2"></a><p> Qt 3.x remove some unnecessary nested #include directives from
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header files. This speeds up compilation when you don't need those
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nested header files. But in some cases you will find you need to add
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an extra #include to your files.
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<p> For example, if you get a message about <a href="qstringlist.html">QStringList</a> or its functions
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not being defined, then add <tt>#include <qstringlist.h></tt> at
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the top of the file giving the error.
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<p> Header files that you might need to add #include directives for include:
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<ul>
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<li> <tt><qcursor.h></tt>
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<li> <tt><qpainter.h></tt>
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<li> <tt><qpen.h></tt>
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<li> <tt><qstringlist.h></tt>
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<li> <tt><qregexp.h></tt>
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<li> <tt><qstrlist.h></tt>
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<li> <tt><qstyle.h></tt>
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<li> <tt><qvaluelist.h></tt>
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</ul>
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<p> <h2> Namespace
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</h2>
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<a name="3"></a><p> Qt 3.x is namespace clean. A few global identifiers that had been
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left in Qt 2.x have been discarded.
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<p> Enumeration <a href="qt.html#CursorShape-enum">Qt::CursorShape</a> and its values are now part of the
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special <a href="qt.html">Qt</a> class defined in qnamespace.h. If you get compilation
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errors about these being missing (unlikely, since most of your code will
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be in classes that inherit from the Qt namespace class), then apply
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the following changes:
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<p> <ul>
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<li> <tt>QCursorShape</tt> becomes <a href="qt.html#CursorShape-enum">Qt::CursorShape</a>
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<li> <tt>ArrowCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::ArrowCursor</a>
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<li> <tt>UpArrowCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::UpArrowCursor</a>
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<li> <tt>CrossCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::CrossCursor</a>
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<li> <tt>WaitCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::WaitCursor</a>
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<li> <tt>IbeamCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::IbeamCursor</a>
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<li> <tt>SizeVerCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SizeVerCursor</a>
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<li> <tt>SizeHorCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SizeHorCursor</a>
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<li> <tt>SizeBDiagCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SizeBDiagCursor</a>
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<li> <tt>SizeFDiagCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SizeFDiagCursor</a>
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<li> <tt>SizeAllCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SizeAllCursor</a>
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<li> <tt>BlankCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::BlankCursor</a>
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<li> <tt>SplitVCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SplitVCursor</a>
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<li> <tt>SplitHCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::SplitHCursor</a>
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<li> <tt>PointingHandCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::PointingHandCursor</a>
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<li> <tt>BitmapCursor</tt> becomes <a href="qt.html#CursorShape-enum">Qt::BitmapCursor</a>
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</ul>
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<p> The names of some debugging macro variables have been changed. We have
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tried not to break source compatibility as much as possible. If you observe
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error messages on the UNIX console or the Windows debugging stream that were
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previously disabled, please check these macro variables:
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<p> <ul>
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<li> <tt>DEBUG</tt> becomes <tt>QT_DEBUG</tt>
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<li> <tt>NO_DEBUG</tt> becomes <tt>QT_NO_DEBUG</tt>
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<li> <tt>NO_CHECK</tt> becomes <tt>QT_NO_CHECK</tt>
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<li> <tt>CHECK_STATE</tt> becomes <tt>QT_CHECK_STATE</tt>
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<li> <tt>CHECK_RANGE</tt> becomes <tt>QT_CHECK_RANGE</tt>
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<li> <tt>CHECK_NULL</tt> becomes <tt>QT_CHECK_NULL</tt>
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<li> <tt>CHECK_MATH</tt> becomes <tt>QT_CHECK_MATH</tt>
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</ul>
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<p> The name of some debugging macro functions has been changed as well
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but source compatibility should not be affected if the macro variable
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<tt>QT_CLEAN_NAMESPACE</tt> is not defined:
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<p> <ul>
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<li> <tt>ASSERT</tt> becomes <tt>Q_ASSERT</tt>
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<li> <tt>CHECK_PTR</tt> becomes <tt>Q_CHECK_PTR</tt>
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</ul>
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<p> For the record, undocumented macro variables that are not part of the API
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have been changed:
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<p> <ul>
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<li> <tt>_OS_*_</tt> becomes <tt>Q_OS_*</tt>
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<li> <tt>_WS_*_</tt> becomes <tt>Q_WS_*</tt>
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<li> <tt>_CC_*_</tt> becomes <tt>Q_CC_*</tt>
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</ul>
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<p> <h2> Removed Functions
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</h2>
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<a name="4"></a><p> All these functions have been removed in Qt 3.x:
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<ul>
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<li> QFont::charSet()
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<li> QFont::setCharSet()
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<li> QMenuBar::setActItem()
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<li> QMenuBar::setWindowsAltMode()
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<li> QObject::initMetaObject()
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<li> QPainter::drawQuadBezier()
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<li> QPointArray::quadBezier()
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<li> QRegExp::find()
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<li> QSpinBox::downButton()
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<li> QSpinBox::upButton()
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<li> QString::basicDirection()
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<li> QString::visual()
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<li> QStyle::set...() functions
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<li> QStyle::drawArrow()
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<li> QWidget::setFontPropagation()
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<li> QWidget::setPalettePropagation()
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</ul>
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<p> Also, to avoid conflicts with <tt><iostream></tt>, the following three
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global functions have been renamed:
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<ul>
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<li> setw() (renamed qSetW())
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<li> setfill() (renamed qSetFill())
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<li> setprecision() (renamed qSetPrecision())
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</ul>
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<p> <h2> Obsoleted Functions
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</h2>
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<a name="5"></a><p> The following functions have been obsoleted in Qt 3.0. The
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documentation of each of these functions should explain how to
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replace them in Qt 3.0.
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<p> <b>Warning:</b> It is best to consult <a href="http://doc.trolltech.com/3.0/">http://doc.trolltech.com/3.0/</a>
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rather than the documentation supplied with Qt to obtain the latest
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information regarding obsolete functions and how to replace them in
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new code.
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<p> <ul>
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<li> <a href="qaccel.html#keyToString">QAccel::keyToString</a>( <a href="qkeysequence.html">QKeySequence</a> k )
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<li> <a href="qaccel.html#stringToKey">QAccel::stringToKey</a>( const <a href="qstring.html">QString</a> & s )
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<li> <a href="qactiongroup.html#insert">QActionGroup::insert</a>( <a href="qaction.html">QAction</a> *a )
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<li> <a href="qbutton.html#autoResize">QButton::autoResize</a>() const
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<li> <a href="qbutton.html#setAutoResize">QButton::setAutoResize</a>( bool )
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<li> <a href="qcanvasitem.html#active">QCanvasItem::active</a>() const
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<li> <a href="qcanvasitem.html#enabled">QCanvasItem::enabled</a>() const
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<li> <a href="qcanvasitem.html#selected">QCanvasItem::selected</a>() const
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<li> <a href="qcanvasitem.html#visible">QCanvasItem::visible</a>() const
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<li> <a href="qcanvaspixmaparray.html#QCanvasPixmapArray">QCanvasPixmapArray::QCanvasPixmapArray</a>( <a href="qptrlist.html">QPtrList</a><QPixmap> list, QPtrList<QPoint> hotspots )
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<li> <a href="qcanvaspixmaparray.html#operator!">QCanvasPixmapArray::operator!</a>()
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<li> <a href="qcolorgroup.html#QColorGroup">QColorGroup::QColorGroup</a>( const <a href="qcolor.html">QColor</a> & foreground, const QColor & background, const QColor & light, const QColor & dark, const QColor & mid, const QColor & text, const QColor & base )
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<li> <a href="qcombobox.html#autoResize">QComboBox::autoResize</a>() const
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<li> <a href="qcombobox.html#setAutoResize">QComboBox::setAutoResize</a>( bool )
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<li> <a href="qdate.html#dayName">QDate::dayName</a>( int weekday )
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<li> <a href="qdate.html#monthName">QDate::monthName</a>( int month )
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<li> <a href="qdir.html#encodedEntryList">QDir::encodedEntryList</a>( const <a href="qstring.html">QString</a> & nameFilter, int filterSpec = DefaultFilter, int sortSpec = DefaultSort ) const
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<li> QDir::encodedEntryList( int filterSpec = DefaultFilter, int sortSpec = DefaultSort ) const
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<li> <a href="qdockwindow.html#isHorizontalStretchable">QDockWindow::isHorizontalStretchable</a>() const
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<li> <a href="qdockwindow.html#isVerticalStretchable">QDockWindow::isVerticalStretchable</a>() const
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<li> <a href="qdockwindow.html#setHorizontalStretchable">QDockWindow::setHorizontalStretchable</a>( bool b )
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<li> <a href="qdockwindow.html#setVerticalStretchable">QDockWindow::setVerticalStretchable</a>( bool b )
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<li> <a href="qfont.html#defaultFont">QFont::defaultFont</a>()
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<li> <a href="qfont.html#setDefaultFont">QFont::setDefaultFont</a>( const <a href="qfont.html">QFont</a> & f )
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<li> <a href="qfont.html#setPixelSizeFloat">QFont::setPixelSizeFloat</a>( float pixelSize )
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<li> <a href="qfontdatabase.html#bold">QFontDatabase::bold</a>( const QString & family, const QString & style, const <a href="qstring.html">QString</a> & ) const
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<li> <a href="qfontdatabase.html#families">QFontDatabase::families</a>( bool ) const
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<li> <a href="qfontdatabase.html#font">QFontDatabase::font</a>( const QString & familyName, const QString & style, int pointSize, const QString & )
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<li> <a href="qfontdatabase.html#isBitmapScalable">QFontDatabase::isBitmapScalable</a>( const QString & family, const QString & style, const QString & ) const
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<li> <a href="qfontdatabase.html#isFixedPitch">QFontDatabase::isFixedPitch</a>( const QString & family, const QString & style, const QString & ) const
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<li> <a href="qfontdatabase.html#isScalable">QFontDatabase::isScalable</a>( const QString & family, const QString & style, const QString & ) const
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<li> <a href="qfontdatabase.html#isSmoothlyScalable">QFontDatabase::isSmoothlyScalable</a>( const QString & family, const QString & style, const QString & ) const
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<li> <a href="qfontdatabase.html#italic">QFontDatabase::italic</a>( const <a href="qstring.html">QString</a> & family, const QString & style, const QString & ) const
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<li> <a href="qfontdatabase.html#pointSizes">QFontDatabase::pointSizes</a>( const QString & family, const QString & style, const QString & )
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<li> <a href="qfontdatabase.html#smoothSizes">QFontDatabase::smoothSizes</a>( const QString & family, const QString & style, const QString & )
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<li> <a href="qfontdatabase.html#styles">QFontDatabase::styles</a>( const QString & family, const QString & ) const
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<li> <a href="qfontdatabase.html#weight">QFontDatabase::weight</a>( const QString & family, const QString & style, const QString & ) const
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<li> <a href="qlabel.html#autoResize">QLabel::autoResize</a>() const
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<li> <a href="qlabel.html#setAutoResize">QLabel::setAutoResize</a>( bool enable )
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<li> <a href="qlineedit.html#cursorLeft">QLineEdit::cursorLeft</a>( bool mark, int steps = 1 )
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<li> <a href="qlineedit.html#cursorRight">QLineEdit::cursorRight</a>( bool mark, int steps = 1 )
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<li> <a href="qlineedit.html#hasMarkedText">QLineEdit::hasMarkedText</a>() const
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<li> <a href="qlineedit.html#markedText">QLineEdit::markedText</a>() const
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<li> <a href="qlineedit.html#repaintArea">QLineEdit::repaintArea</a>( int, int )
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<li> <a href="qlistbox.html#cellHeight">QListBox::cellHeight</a>( int i ) const
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<li> QListBox::cellHeight() const
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<li> <a href="qlistbox.html#cellWidth">QListBox::cellWidth</a>() const
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<li> <a href="qlistbox.html#findItem">QListBox::findItem</a>( int yPos ) const
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<li> <a href="qlistbox.html#inSort">QListBox::inSort</a>( const <a href="qlistboxitem.html">QListBoxItem</a> *lbi )
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<li> QListBox::inSort( const <a href="qstring.html">QString</a> & text )
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<li> <a href="qlistbox.html#itemYPos">QListBox::itemYPos</a>( int index, int *yPos ) const
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<li> <a href="qlistbox.html#numCols">QListBox::numCols</a>() const
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<li> <a href="qlistbox.html#totalHeight">QListBox::totalHeight</a>() const
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<li> <a href="qlistbox.html#totalWidth">QListBox::totalWidth</a>() const
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<li> <a href="qlistboxitem.html#current">QListBoxItem::current</a>() const
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<li> <a href="qlistboxitem.html#selected">QListBoxItem::selected</a>() const
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<li> <a href="qlistview.html#removeItem">QListView::removeItem</a>( <a href="qlistviewitem.html">QListViewItem</a> *item )
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<li> <a href="qlistviewitem.html#removeItem">QListViewItem::removeItem</a>( QListViewItem *item )
|
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<li> <a href="qmainwindow.html#addToolBar">QMainWindow::addToolBar</a>( <a href="qdockwindow.html">QDockWindow</a> *, Dock = DockTop, bool newLine = FALSE )
|
|
<li> QMainWindow::addToolBar( QDockWindow *, const QString & label, Dock = DockTop, bool newLine = FALSE )
|
|
<li> <a href="qmainwindow.html#lineUpToolBars">QMainWindow::lineUpToolBars</a>( bool keepNewLines = FALSE )
|
|
<li> <a href="qmainwindow.html#moveToolBar">QMainWindow::moveToolBar</a>( QDockWindow *, Dock = DockTop )
|
|
<li> QMainWindow::moveToolBar( QDockWindow *, Dock, bool nl, int index, int extraOffset = -1 )
|
|
<li> <a href="qmainwindow.html#removeToolBar">QMainWindow::removeToolBar</a>( QDockWindow *)
|
|
<li> <a href="qmainwindow.html#setToolBarsMovable">QMainWindow::setToolBarsMovable</a>( bool )
|
|
<li> <a href="qmainwindow.html#toolBarPositionChanged">QMainWindow::toolBarPositionChanged</a>( <a href="qtoolbar.html">QToolBar</a> *)
|
|
<li> <a href="qmainwindow.html#toolBarsMovable">QMainWindow::toolBarsMovable</a>() const
|
|
<li> <a href="qmessagebox.html#message">QMessageBox::message</a>( const <a href="qstring.html">QString</a> & caption, const QString & text, const QString & buttonText = <a href="qstring.html#QString-null">QString::null</a>, <a href="qwidget.html">QWidget</a> *parent = 0, const char *= 0 )
|
|
<li> <a href="qmessagebox.html#query">QMessageBox::query</a>( const QString & caption, const QString & text, const QString & yesButtonText = QString::null, const QString & noButtonText = QString::null, QWidget *parent = 0, const char *= 0 )
|
|
<li> <a href="qmessagebox.html#standardIcon">QMessageBox::standardIcon</a>( Icon icon, GUIStyle style )
|
|
<li> <a href="qpalette.html#normal">QPalette::normal</a>()
|
|
<li> <a href="qregexp.html#match">QRegExp::match</a>( const QString & str, int index = 0, int *len = 0, bool indexIsStart = TRUE ) const
|
|
<li> <a href="qscrollview.html#childIsVisible">QScrollView::childIsVisible</a>( QWidget *child )
|
|
<li> <a href="qscrollview.html#showChild">QScrollView::showChild</a>( QWidget *child, bool show = TRUE )
|
|
<li> <a href="qsignal.html#block">QSignal::block</a>( bool b )
|
|
<li> <a href="qsignal.html#isBlocked">QSignal::isBlocked</a>() const
|
|
<li> <a href="qsignal.html#parameter">QSignal::parameter</a>() const
|
|
<li> <a href="qsignal.html#setParameter">QSignal::setParameter</a>( int value )
|
|
<li> <a href="qsimplerichtext.html#draw">QSimpleRichText::draw</a>( <a href="qpainter.html">QPainter</a> *p, int x, int y, const <a href="qregion.html">QRegion</a> & clipRegion, const <a href="qcolorgroup.html">QColorGroup</a> & cg, const <a href="qbrush.html">QBrush</a> *paper = 0 ) const
|
|
<li> <a href="qstring.html#ascii">QString::ascii</a>() const
|
|
<li> <a href="qstring.html#data">QString::data</a>() const
|
|
<li> <a href="qstring.html#setExpand">QString::setExpand</a>( uint index, <a href="qchar.html">QChar</a> c )
|
|
<li> <a href="qstyle.html#defaultFrameWidth">QStyle::defaultFrameWidth</a>() const
|
|
<li> <a href="qstyle.html#scrollBarExtent">QStyle::scrollBarExtent</a>() const
|
|
<li> <a href="qstyle.html#tabbarMetrics">QStyle::tabbarMetrics</a>( const <a href="qwidget.html">QWidget</a> *t, int & hf, int & vf, int & ov ) const
|
|
<li> <a href="qtabdialog.html#isTabEnabled">QTabDialog::isTabEnabled</a>( const char *name ) const
|
|
<li> <a href="qtabdialog.html#selected">QTabDialog::selected</a>( const <a href="qstring.html">QString</a> & )
|
|
<li> QTabDialog::selected( const QString & tabLabel )
|
|
<li> <a href="qtabdialog.html#setTabEnabled">QTabDialog::setTabEnabled</a>( const char *name, bool enable )
|
|
<li> <a href="qtextstream.html#QTextStream">QTextStream::QTextStream</a>( QString & str, int filemode )
|
|
<li> <a href="qtoolbar.html#QToolBar">QToolBar::QToolBar</a>( const QString & label, <a href="qmainwindow.html">QMainWindow</a> *, ToolBarDock = DockTop, bool newLine = FALSE, const char *name = 0 )
|
|
<li> <a href="qtoolbutton.html#iconSet">QToolButton::iconSet</a>( bool on ) const
|
|
<li> <a href="qtoolbutton.html#offIconSet">QToolButton::offIconSet</a>() const
|
|
<li> <a href="qtoolbutton.html#onIconSet">QToolButton::onIconSet</a>() const
|
|
<li> <a href="qtoolbutton.html#setIconSet">QToolButton::setIconSet</a>( const <a href="qiconset.html">QIconSet</a> & set, bool on )
|
|
<li> <a href="qtoolbutton.html#setOffIconSet">QToolButton::setOffIconSet</a>( const QIconSet & )
|
|
<li> <a href="qtoolbutton.html#setOnIconSet">QToolButton::setOnIconSet</a>( const QIconSet & )
|
|
<li> <a href="qtooltip.html#enabled">QToolTip::enabled</a>()
|
|
<li> <a href="qtooltip.html#setEnabled">QToolTip::setEnabled</a>( bool enable )
|
|
<li> <a href="qtranslator.html#find">QTranslator::find</a>( const char *context, const char *sourceText, const char *comment = 0 ) const
|
|
<li> <a href="qtranslator.html#insert">QTranslator::insert</a>( const char *context, const char *sourceText, const <a href="qstring.html">QString</a> & translation )
|
|
<li> <a href="qtranslator.html#remove">QTranslator::remove</a>( const char *context, const char *sourceText )
|
|
<li> <a href="quridrag.html#setFilenames">QUriDrag::setFilenames</a>( const <a href="qstringlist.html">QStringList</a> & fnames )
|
|
<li> <a href="qwidget.html#backgroundColor">QWidget::backgroundColor</a>() const
|
|
<li> <a href="qwidget.html#backgroundPixmap">QWidget::backgroundPixmap</a>() const
|
|
<li> <a href="qwidget.html#iconify">QWidget::iconify</a>()
|
|
<li> <a href="qwidget.html#setBackgroundColor">QWidget::setBackgroundColor</a>( const <a href="qcolor.html">QColor</a> & c )
|
|
<li> <a href="qwidget.html#setBackgroundPixmap">QWidget::setBackgroundPixmap</a>( const <a href="qpixmap.html">QPixmap</a> & pm )
|
|
<li> <a href="qwidget.html#setFont">QWidget::setFont</a>( const <a href="qfont.html">QFont</a> & f, bool )
|
|
<li> <a href="qwidget.html#setPalette">QWidget::setPalette</a>( const <a href="qpalette.html">QPalette</a> & p, bool )
|
|
<li> <a href="qwizard.html#setFinish">QWizard::setFinish</a>( <a href="qwidget.html">QWidget</a> *, bool )
|
|
<li> <a href="qxmlinputsource.html#QXmlInputSource">QXmlInputSource::QXmlInputSource</a>( <a href="qfile.html">QFile</a> & file )
|
|
<li> QXmlInputSource::QXmlInputSource( <a href="qtextstream.html">QTextStream</a> & stream )
|
|
<li> <a href="qxmlreader.html#parse">QXmlReader::parse</a>( const <a href="qxmlinputsource.html">QXmlInputSource</a> & input )
|
|
</ul>
|
|
<p> Additionally, these preprocessor directives have been removed:
|
|
<p> <ul>
|
|
<li> <tt>#define strlen qstrlen</tt>
|
|
<li> <tt>#define strcpy qstrcpy</tt>
|
|
<li> <tt>#define strcmp qstrcmp</tt>
|
|
<li> <tt>#define strncmp qstrncmp</tt>
|
|
<li> <tt>#define stricmp qstricmp</tt>
|
|
<li> <tt>#define strnicmp qstrnicmp</tt>
|
|
</ul>
|
|
<p> See the changes-3.0.0 document for an explanation of why this had to be done.
|
|
You might have been relying on the non-portable and unpredictable behavior
|
|
resulting from these directives. We strongly recommend that you either make
|
|
use of the safe qstr* variants directly or ensure that no 0 pointer is
|
|
passed to the standard C functions in your code base.
|
|
<p> <h2> Collection Class Renaming
|
|
</h2>
|
|
<a name="6"></a><p> The classes QArray, QCollection, QList, QListIterator, QQueue, QStack
|
|
and QVector have been renamed. To ease porting, the old names and the
|
|
old header-file names are still supported.
|
|
<p> <center><table cellpadding="4" cellspacing="2" border="0">
|
|
<tr bgcolor="#a2c511"> <th valign="top">Old Name <th valign="top">New Name <th valign="top">New Header File
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">QArray <td valign="top"><a href="qmemarray.html">QMemArray</a> <td valign="top"><tt><qmemarray.h></tt>
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">QCollection <td valign="top"><a href="qptrcollection.html">QPtrCollection</a> <td valign="top"><tt><qptrcollection.h></tt>
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">QList <td valign="top"><a href="qptrlist.html">QPtrList</a> <td valign="top"><tt><qptrlist.h></tt>
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">QListIterator <td valign="top"><a href="qptrlistiterator.html">QPtrListIterator</a> <td valign="top"><tt><qptrlist.h></tt>
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">QQueue <td valign="top"><a href="qptrqueue.html">QPtrQueue</a> <td valign="top"><tt><qptrqueue.h></tt>
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">QStack <td valign="top"><a href="qptrstack.html">QPtrStack</a> <td valign="top"><tt><qptrstack.h></tt>
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">QVector <td valign="top"><a href="qptrvector.html">QPtrVector</a> <td valign="top"><tt><qptrvector.h></tt>
|
|
</table></center>
|
|
<p> <h2> <a href="qbuttongroup.html">QButtonGroup</a>
|
|
</h2>
|
|
<a name="7"></a><p> In Qt 2.x, the function <a href="qbuttongroup.html#selected">QButtonGroup::selected</a>() returns the selected
|
|
<em>radio</em> button (<a href="qradiobutton.html">QRadioButton</a>). In Qt 3.0, it returns the selected <em>toggle</em> button (<a href="qbutton.html#toggleButton-prop">QButton::toggleButton</a>), a more general concept.
|
|
This might affect programs that use QButtonGroups that contain a
|
|
mixture of radio buttons and non-radio (e.g. <a href="qcheckbox.html">QCheckBox</a>) toggle buttons.
|
|
<p> <h2> <a href="qdate.html">QDate</a>
|
|
</h2>
|
|
<a name="8"></a><p> Two QDate member functions that were virtual in Qt 2.0 are not virtual
|
|
in Qt 3.0. This is only relevant if you subclassed QDate and
|
|
reimplemented these functions:
|
|
<p> <ul>
|
|
<li> <a href="qstring.html">QString</a> <a href="qdate.html#monthName">QDate::monthName</a>( int month ) const
|
|
<li> QString <a href="qdate.html#dayName">QDate::dayName</a>( int weekday ) const
|
|
</ul>
|
|
<p> In addition to no longer being virtual, QDate::monthName() and
|
|
QDate::dayName() have been renamed <a href="qdate.html#shortMonthName">QDate::shortMonthName</a>() and
|
|
<a href="qdate.html#shortDayName">QDate::shortDayName</a>() and have been made static (as they should had
|
|
been in the first place). The old names are still provided for source
|
|
compatibility.
|
|
<p> <h2> <a href="qfiledialog.html">QFileDialog</a>
|
|
</h2>
|
|
<a name="9"></a><p> If the mode was not set explicitly, and the user entered a
|
|
non-existent file, the dialog would accept this. In Qt 3.x, you must
|
|
set the mode, e.g. setMode(QFileDialog::AnyFile), to get the same
|
|
behavior.
|
|
<p> <h2> <a href="qfont.html">QFont</a>
|
|
</h2>
|
|
<a name="10"></a><p> The internals of QFont have changed significantly between Qt 2.2 and
|
|
Qt 3.0, to give better Unicode support and to make developing
|
|
internationalized applications easier. The original API has been
|
|
preserved with minimal changes. The CharSet enum and its related
|
|
functions have disappeared. This is because Qt now handles all charset
|
|
related issues internally, and removes this burden from the developer.
|
|
<p> If you used the CharSet enum or its related functions, e.g
|
|
QFont::charSet() or QFont::setCharSet(), just remove them from your
|
|
code. There are a few functions that took a QFont::CharSet as a
|
|
parameter; in these cases simply remove the charset from the
|
|
parameter list.
|
|
<p> <h2> <a href="qinputdialog.html">QInputDialog</a>
|
|
</h2>
|
|
<a name="11"></a><p> The two static getText(...) methods in QInputDialog have been merged.
|
|
The <tt>echo</tt> parameter is the third parameter and defaults to
|
|
QLineEdit::Normal.
|
|
<p> If you used calls to <a href="qinputdialog.html#getText">QInputDialog::getText</a>(...) that provided more
|
|
than the first two required parameters you will must add a value
|
|
for the <tt>echo</tt> parameter.
|
|
<p> <h2> <a href="qlayout.html">QLayout</a> and Other Abstract Layout Classes
|
|
</h2>
|
|
<a name="12"></a><p> The definitions of <a href="qglayoutiterator.html">QGLayoutIterator</a>, <a href="qlayout.html">QLayout</a>, <a href="qlayoutitem.html">QLayoutItem</a>, <a href="qlayoutiterator.html">QLayoutIterator</a>, <a href="qspaceritem.html">QSpacerItem</a> and <a href="qwidgetitem.html">QWidgetItem</a> have been moved from <tt><qabstractlayout.h></tt> to <tt><qlayout.h></tt>. The header <tt><qabstractlayout.h></tt> now includes <tt><qlayout.h></tt> for compatibility. It
|
|
might be removed in a future version.
|
|
<p> <h2> <a href="qlistviewitem.html">QListViewItem</a>
|
|
</h2>
|
|
<a name="13"></a><p> The paintBranches() function in Qt 2.x had a GUIStyle parameter; this
|
|
has been dropped for Qt 3.x since GUI style is handled by the new
|
|
style engine (See <a href="qstyle.html">QStyle</a>.)
|
|
<p> <h2> <a href="qmoveevent.html">QMoveEvent</a>
|
|
</h2>
|
|
<a name="14"></a><p> In Qt 2.x, the function <a href="qmoveevent.html#pos">QMoveEvent::pos</a>() returned the position of the
|
|
widget in its parent widget, including the window frame. In Qt 3.0,
|
|
it returns the new position of the widget, excluding window frame for
|
|
top level widgets.
|
|
<p> <h2> QMultiLineEdit
|
|
</h2>
|
|
<a name="15"></a><p> The QMultiLineEdit was a simple editor widget in previous Qt versions.
|
|
Since Qt 3.0 includes a new richtext engine, which also supports
|
|
editing, QMultiLineEdit is obsolete. For the sake of compatibility
|
|
QMultiLineEdit is still provided. It is now a subclass of <a href="qtextedit.html">QTextEdit</a>
|
|
which wraps the old QMultiLineEdit so that it is mostly source
|
|
compatible to keep old applications working.
|
|
<p> For new applications and when maintaining existing applications we
|
|
recommend that you use QTextEdit instead of QMultiLineEdit wherever
|
|
possible.
|
|
<p> Although most of the old QMultiLineEdit API is still available, there
|
|
is one important difference. The old QMultiLineEdit operated in terms
|
|
of lines, whereas QTextEdit operates in terms of paragraphs. This is
|
|
because lines change all the time during wordwrap, whereas paragraphs
|
|
remain paragraphs. The consequence of this change is that functions
|
|
which previously operated on lines, e.g. numLines(), textLine(), etc.,
|
|
now work on paragraphs.
|
|
<p> Also the function getString() has been removed since it
|
|
published the internal data structure.
|
|
<p> In most cases, applications that used QMultiLineEdit will continue to
|
|
work without problems. Applications that worked in terms of lines may
|
|
require some porting.
|
|
<p> The source code for the old 2.x version of QMultiLineEdit can be found
|
|
in <tt>$QTDIR/src/attic/qtmultilineedit.h/cpp</tt>. Note that the class has
|
|
been renamed to QtMultiLineEdit to avoid name clashes. If you really
|
|
need to keep compatibility with the old QMultiLineEdit, simply include
|
|
this class in your project and rename QMultiLineEdit to
|
|
QtMultiLineEdit throughout.
|
|
<p> <h2> <a href="qprinter.html">QPrinter</a>
|
|
</h2>
|
|
<a name="16"></a><p> QPrinter has undergone some changes, to make it more flexible and
|
|
to ensure it has the same runtime behaviour on both Unix and Windows. In 2.x,
|
|
QPrinter behaved differently on Windows and Unix, when using view
|
|
transformations on the <a href="qpainter.html">QPainter</a>. This has changed now, and QPrinter
|
|
behaves consistently across all platforms. A compatibilty mode has been
|
|
added that forces the old behaviour, to ease porting from Qt 2.x
|
|
to Qt 3.x. This compatibilty mode can be enabled by passing the
|
|
QPrinter::Compatible flag to the QPrinter constructor.
|
|
<p> On X11, QPrinter used to generate encapsulated postscript when
|
|
fullPage() was TRUE and only one page was printed. This does not
|
|
happen by default anymore, providing a more consistent printing output.
|
|
<p> <h2> <a href="qregexp.html">QRegExp</a>
|
|
</h2>
|
|
<a name="17"></a><p> The <a href="qregexp.html">QRegExp</a> class has been rewritten to support many of the features of Perl
|
|
regular expressions. Both the <a href="qregexp.html#regular-expression">regular expression</a> syntax and the QRegExp
|
|
interface have been modified.
|
|
<p> Be also aware that <tt><qregexp.h></tt> is no longer included
|
|
automatically when you include <tt><qstringlist.h></tt>. See
|
|
<a href="#Headers">above</a> for details.
|
|
<p>
|
|
<p> <h3> New special characters
|
|
</h3>
|
|
<a name="17-1"></a><p> There are five new special characters: <tt>(</tt>, <tt>)</tt>, <tt>{</tt>,
|
|
<tt>|</tt> and <tt>}</tt> (parentheses, braces and pipe). When porting old
|
|
regular expressions, you must add <tt>\</tt> (backslash) in front of any
|
|
of these (actually, <tt>\\</tt> in C++ strings), unless it is already
|
|
there.
|
|
<p> Example: Old code like
|
|
<pre>
|
|
<a href="qregexp.html">QRegExp</a> rx( "([0-9|]*\\)" ); // works in Qt 2.x
|
|
</pre>
|
|
|
|
should be converted into
|
|
<pre>
|
|
<a href="qregexp.html">QRegExp</a> rx( "\\([0-9\\|]*\\)" ); // works in Qt 2.x and 3.x
|
|
</pre>
|
|
|
|
(Within character classes, the backslash is not necessary in front of certain
|
|
characters, e.g. <tt>|</tt>, but it doesn't hurt.)
|
|
<p> Wildcard patterns need no conversion. Here are two examples:
|
|
<pre>
|
|
<a href="qregexp.html">QRegExp</a> wild( "(*.*)" );
|
|
wild.<a href="qregexp.html#setWildcard">setWildcard</a>( TRUE );
|
|
</pre>
|
|
|
|
<pre>
|
|
// TRUE as third argument means wildcard
|
|
<a href="qregexp.html">QRegExp</a> wild( "(*.*)", FALSE, TRUE );
|
|
</pre>
|
|
|
|
However, when they are used, make sure to use <a href="qregexp.html#exactMatch">QRegExp::exactMatch</a>()
|
|
rather than the obsolete <a href="qregexp.html#match">QRegExp::match</a>(). QRegExp::match(), like
|
|
QRegExp::find(), tries to find a match somewhere in the target
|
|
string, while QRegExp::exactMatch() tries to match the whole target
|
|
string.
|
|
<p> <h3> <a href="qregexp.html#operator-eq">QRegExp::operator=</a>()
|
|
</h3>
|
|
<a name="17-2"></a><p> This function has been replaced by <a href="qregexp.html#setPattern">QRegExp::setPattern</a>() in Qt 2.2.
|
|
Old code such as
|
|
<pre>
|
|
<a href="qregexp.html">QRegExp</a> rx( "alpha" );
|
|
rx.<a href="qregexp.html#setCaseSensitive">setCaseSensitive</a>( FALSE );
|
|
rx.<a href="qregexp.html#setWildcard">setWildcard</a>( TRUE );
|
|
rx = "beta";
|
|
</pre>
|
|
|
|
still compiles with Qt 3, but produces a different result (the case sensitivity
|
|
and wildcard options are forgotten). This way,
|
|
<pre>
|
|
rx = "beta";
|
|
</pre>
|
|
|
|
is the same as
|
|
<pre>
|
|
rx = QRegExp( "beta" );
|
|
</pre>
|
|
|
|
which is what one expects.
|
|
<p> <h3> QRegExp::match()
|
|
</h3>
|
|
<a name="17-3"></a><p> The following function is now obsolete, as it has an unwieldy
|
|
parameter list and was poorly named:
|
|
<ul>
|
|
<li> bool <a href="qregexp.html#match">QRegExp::match</a>( const <a href="qstring.html">QString</a> & str, int index = 0,
|
|
int * len = 0, bool indexIsStart = TRUE ) const
|
|
</ul>
|
|
It will be removed in a future version of Qt. Its <a href="qregexp.html#match">documentation</a> explains how to replace it.
|
|
<p> <h3> QRegExp::find()
|
|
</h3>
|
|
<a name="17-4"></a><p> This function was removed, after a brief appearance in Qt 2.2. Its
|
|
name clashed with <a href="qstring.html#find">QString::find</a>(). Use <a href="qregexp.html#search">QRegExp::search</a>() or <a href="qstring.html#find">QString::find</a>() instead.
|
|
<p> <h3> <a href="qstring.html#findRev">QString::findRev</a>() and <a href="qstring.html#contains">QString::contains</a>()
|
|
</h3>
|
|
<a name="17-5"></a><p> <a href="qstring.html#findRev">QString::findRev</a>()'s and <a href="qstring.html#contains">QString::contains</a>()'s semantics have changed
|
|
between 2.0 and 3.0 to be more consistent with the other overloads.
|
|
<p> For example,
|
|
<pre>
|
|
QString( "" ).contains( QRegExp("") )
|
|
</pre>
|
|
|
|
returns 1 in Qt 2.0; it returns 0 in Qt 3.0. Also, "^" now really means
|
|
start of input, so
|
|
<pre>
|
|
QString( "Heisan Hoppsan" ).contains( QRegExp("^.*$") )
|
|
</pre>
|
|
|
|
returns 1, not 13 or 14.
|
|
<p> This change affect very few existing programs.
|
|
<p> <h3> <a href="qstring.html#replace">QString::replace</a>()
|
|
</h3>
|
|
<a name="17-6"></a><p> With Qt 1.0 and 2.0, a <a href="qstring.html">QString</a> is converted implicitly into a <a href="qregexp.html">QRegExp</a>
|
|
as the first argument to QString::replace():
|
|
<pre>
|
|
<a href="qstring.html">QString</a> text = fetch_it_from_somewhere();
|
|
text.<a href="qstring.html#replace">replace</a>( QString("[A-Z]+"), "" );
|
|
</pre>
|
|
|
|
With Qt 3.0, the compiler gives an error. The solution is to use a
|
|
QRegExp cast:
|
|
<pre>
|
|
text.replace( QRegExp("[A-Z]+"), "" );
|
|
</pre>
|
|
|
|
This change makes it possible to introduce a
|
|
QString::replace(QString, QString) overload in a future version of Qt
|
|
without breaking source compatibility.
|
|
<p> <h2> QSemiModal
|
|
</h2>
|
|
<a name="18"></a><p> The QSemiModal class is now obsolete. You should call show() on a
|
|
modal dialog instead.
|
|
<p> <h2> QSortedList
|
|
</h2>
|
|
<a name="19"></a><p> The QSortedList class is now obsolete. Consider using a <a href="qdict.html">QDict</a>, a <a href="qmap.html">QMap</a>
|
|
or a plain <a href="qptrlist.html">QPtrList</a> instead.
|
|
<p> <h2> QTableView
|
|
</h2>
|
|
<a name="20"></a><p> The QTableView class has been obsoleted and is no longer a part of the
|
|
Qt API. Either use the powerful <a href="qtable.html">QTable</a> class or the simplistic
|
|
<a href="qgridview.html">QGridView</a> in any new code you create. If you really need the old table
|
|
view for compatibility you can find it in <tt>$QTDIR/src/attic/qttableview.{cpp,h}</tt>. Note that the class has been
|
|
renamed from QTableView to QtTableView to avoid name clashes. To use
|
|
it, simply include it in your project and rename QTableView to
|
|
QtTableView throughout.
|
|
<p> <h2> <a href="qtoolbutton.html">QToolButton</a>
|
|
</h2>
|
|
<a name="21"></a><p> The <a href="qtoolbutton.html">QToolButton</a> class used to distinguish between "on" and "off"
|
|
icons. In 3.0, this mechanism was moved into the <a href="qiconset.html">QIconSet</a> class
|
|
(see <a href="qiconset.html#State-enum">QIconSet::State</a>).
|
|
<p> The old <a href="qtoolbutton.html#onIconSet-prop">QToolButton::onIconSet</a> and <a href="qtoolbutton.html#offIconSet-prop">QToolButton::offIconSet</a>
|
|
properties are still provided so that old source will compile, but
|
|
their semantics have changed: they are now synonyms for <a href="qtoolbutton.html#iconSet-prop">QToolButton::iconSet</a>. If you used that distinction in Qt 2.x, you will
|
|
need to adjust your code to use the <a href="qiconset.html">QIconSet</a> On/Off mechanism.
|
|
<p> Likewise, the <em>on</em> parameter of these two functions is now ignored:
|
|
<p> <ul>
|
|
<li> void QToolButton::setIconSet ( const QIconSet & set, bool on )
|
|
<li> QIconSet QToolButton::iconSet ( bool on ) const
|
|
</ul>
|
|
<p> These functions are only provided for ease of porting. New code
|
|
should use the following instead:
|
|
<p> <ul>
|
|
<li> void <a href="qtoolbutton.html#setIconSet">QToolButton::setIconSet</a>( const QIconSet & set )
|
|
<li> QIconSet <a href="qtoolbutton.html#iconSet">QToolButton::iconSet</a>() const
|
|
</ul>
|
|
<p> Finally, this function is no longer virtual:
|
|
<p> <ul>
|
|
<li> void QToolButton::setIconSet( const QIconSet & set, bool on )
|
|
</ul>
|
|
<p> If you have a class that inherits <a href="qtoolbutton.html">QToolButton</a> and that reimplements
|
|
QToolButton::setIconSet(), you should make the signature of the
|
|
reimplementation agree with the new <a href="qtoolbutton.html#setIconSet">QToolButton::setIconSet</a>(),
|
|
a virtual function.
|
|
<p> <h2> <a href="qtextstream.html">QTextStream</a>
|
|
</h2>
|
|
<a name="22"></a><p> The global QTextStream manipulators setw(), setfill() and setprecison()
|
|
were renamed to qSetW(), qSetFill() and qSetPrecision() to avoid conflicts
|
|
with <tt><iostream.h></tt>. If you used them, you must rename the occurrences to
|
|
the new names.
|
|
<p> <h2> <a href="qtranslator.html">QTranslator</a>
|
|
</h2>
|
|
<a name="23"></a><p> The <a href="qtranslator.html">QTranslator</a> class was extended in Qt 2.2, and these extensions
|
|
lead to a new interface. This interface is used mainly by translation
|
|
tools (for example, <a href="linguist-manual.html">Qt
|
|
Linguist</a>). For source compatibility, no member function was
|
|
effectively removed. The <a href="qtranslator.html">QTranslator</a> documentation points out
|
|
which functions are obsolete.
|
|
<p> This function is no longer virtual:
|
|
<p> <ul>
|
|
<li> <a href="qstring.html">QString</a> <a href="qtranslator.html#find">QTranslator::find</a>( const char * context,
|
|
const char * sourceText ) const
|
|
</ul>
|
|
<p> If you have a class that inherits QTranslator and which reimplements
|
|
QTranslator::find(), you should reimplement <a href="qtranslator.html#findMessage">QTranslator::findMessage</a>() instead.
|
|
In fact, find() is now defined in terms of findMessage(). By doing the
|
|
conversion, you will also gain support for translator comments and for any
|
|
future extensions.
|
|
<p> <h2> <a href="qwidget.html">QWidget</a>
|
|
</h2>
|
|
<a name="24"></a><p> <a href="qwidget.html#backgroundColor">QWidget::backgroundColor</a>(), <a href="qwidget.html#setBackgroundColor">QWidget::setBackgroundColor</a>(),
|
|
<a href="qwidget.html#backgroundPixmap">QWidget::backgroundPixmap</a>() and <a href="qwidget.html#setBackgroundPixmap">QWidget::setBackgroundPixmap</a>() have
|
|
often been the source of much confusion in previous releases. Qt 3.0
|
|
addresses this by obsoleting these functions and by replacing them
|
|
with eight new functions: <a href="qwidget.html#eraseColor">QWidget::eraseColor</a>(),
|
|
<a href="qwidget.html#setEraseColor">QWidget::setEraseColor</a>(), <a href="qwidget.html#erasePixmap">QWidget::erasePixmap</a>(),
|
|
<a href="qwidget.html#setErasePixmap">QWidget::setErasePixmap</a>(), <a href="qwidget.html#paletteBackgroundColor">QWidget::paletteBackgroundColor</a>(),
|
|
<a href="qwidget.html#setPaletteBackgroundColor">QWidget::setPaletteBackgroundColor</a>(),
|
|
<a href="qwidget.html#paletteBackgroundPixmap">QWidget::paletteBackgroundPixmap</a>() and
|
|
<a href="qwidget.html#setPaletteBackgroundPixmap">QWidget::setPaletteBackgroundPixmap</a>(). See their documentation for
|
|
details.
|
|
<p> <h2> QXml Classes
|
|
</h2>
|
|
<a name="25"></a><p> <h3> <a href="qxmlinputsource.html">QXmlInputSource</a>
|
|
</h3>
|
|
<a name="25-1"></a><p> The semantics of QXmlInputSource has changed slightly. This change
|
|
only affects code that parses the same data from the same input source
|
|
multiple times. In such cases you must call
|
|
<a href="qxmlinputsource.html#reset">QXmlInputSource::reset</a>() before the second call to
|
|
<a href="qxmlsimplereader.html#parse">QXmlSimpleReader::parse</a>().
|
|
<p> So code like
|
|
<pre>
|
|
<a href="qxmlinputsource.html">QXmlInputSource</a> source( &xmlFile );
|
|
<a href="qxmlsimplereader.html">QXmlSimpleReader</a> reader;
|
|
...
|
|
reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
|
|
...
|
|
reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
|
|
</pre>
|
|
|
|
must be changed to
|
|
<pre>
|
|
<a href="qxmlinputsource.html">QXmlInputSource</a> source( &xmlFile );
|
|
<a href="qxmlsimplereader.html">QXmlSimpleReader</a> reader;
|
|
...
|
|
reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
|
|
...
|
|
source.<a href="qxmlinputsource.html#reset">reset</a>();
|
|
reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
|
|
</pre>
|
|
|
|
<p> <h3> <a href="qxmllocator.html">QXmlLocator</a>
|
|
</h3>
|
|
<a name="25-2"></a><p> Due to some internal changes, it was necessary to clean-up the semantics of
|
|
QXmlLocator: this class is now an abstract class. This shouldn't cause
|
|
any problems, since programmers usually used the QXmlLocator that was
|
|
reported by <a href="qxmlcontenthandler.html#setDocumentLocator">QXmlContentHandler::setDocumentLocator</a>(). If you used this
|
|
class in some other way, you must adjust your code to use the
|
|
QXmlLocator that is reported by the
|
|
QXmlContentHandler::setDocumentLocator() function.
|
|
<p> <h2> Asynchronous I/O Classes
|
|
</h2>
|
|
<a name="26"></a><p> QASyncIO, QDataSink, QDataSource, QIODeviceSource and QDataPump were
|
|
used internally in previous versions of Qt, but are not used anymore.
|
|
They are now obsolete.
|
|
<p> <h2> Transparent widgets
|
|
</h2>
|
|
<a name="27"></a><p> In Qt 2.x, the AutoMask property was used to obtain a
|
|
transparent-looking widget. In general, this approach is slow and
|
|
processor hungry. Qt 3.0 uses the BackgroundOrigin which provides
|
|
vastly improved performance and more flexibility in most cases. The
|
|
few classes for which the AutoMask property is still the best approach
|
|
are <a href="qcheckbox.html">QCheckBox</a>, <a href="qcombobox.html">QComboBox</a>, <a href="qpushbutton.html">QPushButton</a>, <a href="qradiobutton.html">QRadioButton</a> and <a href="qtabwidget.html">QTabWidget</a>.
|
|
<p> <h2> Bezier Curves
|
|
</h2>
|
|
<a name="28"></a><p> The function names for Bezier curves in <a href="qpainter.html">QPainter</a> and <a href="qpointarray.html">QPointArray</a> have
|
|
been corrected. They now properly reflect their cubic form instead of
|
|
a quadratic one. If you have been using either
|
|
QPainter::drawQuadBezier() or QPointArray::quadBezier() you must
|
|
replace these calls with
|
|
<ul>
|
|
<li> void <a href="qpainter.html#drawCubicBezier">QPainter::drawCubicBezier</a>( const QPointArray &, int index=0 ) and
|
|
<li> QPointArray <a href="qpointarray.html#cubicBezier">QPointArray::cubicBezier</a>() const
|
|
</ul>
|
|
respectively. Neither the arguments nor the resulting curve have changed.
|
|
<p> <h2> Locale-aware String Comparisons in <a href="qiconview.html">QIconView</a>, <a href="qlistbox.html">QListBox</a>,
|
|
<a href="qlistview.html">QListView</a> and <a href="qtable.html">QTable</a>
|
|
</h2>
|
|
<a name="29"></a><p> In Qt 2.x, <a href="qstring.html">QString</a> only provided string comparisons using the Unicode
|
|
values of the characters of a string. This is efficient and reliable,
|
|
but it is not the appropriate order for most languages. For example,
|
|
French users expect 'é' (e acute) to be treated essentially as
|
|
'e' and not put after 'z'.
|
|
<p> In Qt 3.0, <a href="qstring.html#localeAwareCompare">QString::localeAwareCompare</a>() implements locale aware
|
|
string comparisions on certain platforms. The classes <a href="qiconview.html">QIconView</a>, <a href="qlistbox.html">QListBox</a>, <a href="qlistview.html">QListView</a> and <a href="qtable.html">QTable</a> now use
|
|
QString::localeAwareCompare() instead of <a href="qstring.html#compare">QString::compare</a>(). If you
|
|
want to control the behaviour yourself you can always reimplement
|
|
<a href="qiconviewitem.html#compare">QIconViewItem::compare</a>(), <a href="qlistbox.html#text">QListBox::text</a>(), <a href="qlistviewitem.html#compare">QListViewItem::compare</a>()
|
|
or <a href="qtableitem.html#key">QTableItem::key</a>() as appropriate.
|
|
<p>
|
|
<!-- eof -->
|
|
<p><address><hr><div align=center>
|
|
<table width=100% cellspacing=0 border=0><tr>
|
|
<td>Copyright © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>Qt 3.3.8</div>
|
|
</table></div></address></body>
|
|
</html>
|