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    1 Qt 3.0 Beta3 is not binary compatible with Beta2, this means that any
    2 programs linked with Beta2 must be recompiled.
    3 
    4 Below you'll find a description of general changes in the Qt Library
    5 and Qt Designer followed by a detailed list of changes in the
    6 programming API.
    7 
    8 
    9 The Qt Library
   10 ========================================
   11 
   12 Documentation
   13 -------------
   14 
   15 Overall enhancements include fixed typos, corrected grammar and
   16 spelling, and the addition of several images and code examples. Most
   17 classes now have useful detailed descriptions. Documentation accuracy
   18 and usability has been generally improved.
   19 
   20 Styles
   21 ------
   22 
   23 In Qt 3.0.0 Beta2, only the Windows and Motif styles were implemented with
   24 the new style API. Now the missing styles (MotifPlus, Platinum, SGI and
   25 CDE) are included.
   26 
   27 MNG
   28 ---
   29 
   30 Updated the libmng that is shipped with Qt to version 1.0.2.
   31 
   32 Wacom Tablet Support
   33 --------------------
   34 
   35 Fixes for Windows to solve the problem of creating a context for every
   36 widget and the problem of opening the dialog and losing the ability to use
   37 the tablet afterwards.
   38 
   39 
   40 Qt Designer
   41 ========================================
   42 
   43  - Added the ability to sort the property editor either by category
   44    (default and old behaviour) or alphabetically.
   45 
   46  - Added the option "-nofwd" to uic which supresses the generation of
   47    forward declarations for custom classes in the generated output.
   48 
   49 -  The way how custom slots and editing these slots directly in the Qt
   50    Designer is handled has been changed. Originally the code for these
   51    slots was saved into the .ui XML file together with the user
   52    interface description and the uic did put this code into the
   53    generated source files.
   54    Now, if code of custom slots is edited directly in the Qt Designer,
   55    additionally to the <filename>.ui of a form, a <filename>.ui.h file
   56    is created. The code is written into this source file now instead
   57    of the .ui file.
   58    This way the code of custom slots can be also easily edited outside
   59    the Qt Designer without subclassing, and it is possible to edit it
   60    both, in the Qt Designer and outside the Qt Designer without
   61    conflicts, as this is a plain text C++ file.
   62    Uic now automatically includes this source file into the generated
   63    sources (if it exists) and, in this case, does not create empty
   64    stubs for the custom slots in the generated sources anymore. So
   65    this code file has not to be added to the project Makefile. If the
   66    source file does not exist, uic falls back to the old behavior and
   67    creates the empty stubs in the generated source.
   68    If a user does not want to subclass to implement the custom slots,
   69    but also does not want to edit the code of the custom slots in the
   70    Qt Designer, it is possible to always create the <formname>.ui.h
   71    for a form (even if it was not edited in the Qt Designer) and edit
   72    that file in a seperate editor. This feature can be configured in
   73    the project settings dialog.
   74    This way, the old approach of subclassing keeps working (and all
   75    old .ui files keep working without any change). Also, for users of
   76    the previous Qt 3.0 Beta versions, Qt Designer can still read the
   77    .ui files which contain code. So also .ui files created with Qt 3.0
   78    Beta versions of the Qt Designer keep working without any change.
   79    Details about the possible concepts which can be used to add code
   80    to a form created by the Qt Designer (subclassing and uic +
   81    <filename>.ui.h) and related information about project management
   82    can be found in the chapter about new features in Qt Designer 3.0
   83    in the Qt Designer manual.
   84 
   85 
   86 Qt Functions
   87 ========================================
   88 
   89 QApplication
   90 ------------
   91 
   92  - flush() no longer calls sendPostedEvents(), as this might be unsafe
   93    under certain circumstances.
   94 
   95 QDataTable
   96 ----------
   97 
   98  - Now uses the new row selection mode of QTable.
   99 
  100 QDomDocument
  101 ------------
  102 
  103  - Fixed the toString() function to work properly with namespaces.
  104  - In Qt 3.0.0 Beta2, there was a workaround for Microsoft's XML parser,
  105    so that the toString() function did not output a doctype that consists
  106    only of the name. This workaround is semantically wrong; it was
  107    reverted.
  108 
  109 QDateEdit
  110 ---------
  111 
  112  - Fixed wrong default size policy and missing size hint.
  113  - Improved focus and tab handling.
  114 
  115 QEffects
  116 --------
  117 
  118  - Tooltips and popup menus scroll and fade again
  119 
  120 QTable
  121 ------
  122 
  123  - Fixed right mouse button handling.
  124  - Implemented row selection modes. This implied adding the new enum values
  125    SingleRow and MultiRow to the enum SelectionMode.
  126  - Doubleclick clears selections completely now.
  127  - Allow different focus styles, namely FollowStyle (draw it as the style
  128    tells you) and SpreadSheet (draw it as it is done in common spreadsheet
  129    programs).
  130 
  131 New functions:
  132 	virtual void setFocusStyle( FocusStyle fs );
  133 	FocusStyle focusStyle() const;
  134 	virtual QRect cellRect( int row, int col ) const;
  135 
  136 QTimeEdit
  137 ---------
  138 
  139  - Fixed wrong default size policy and missing size hint.
  140  - Improved focus and tab handling.
  141 
  142 QTextEdit
  143 ---------
  144 
  145  - QTextCursor is an internal class, so the signal
  146    cursorPositionChanged(QTextCursor*) is only of limited use. Added a
  147    more useful signal in addition.
  148 
  149  - Overrides accelerators for all shortcuts used to edit text.
  150 
  151 New signal:
  152 	void cursorPositionChanged( int para, int pos );
  153 
  154 QLineEdit
  155 ---------
  156 
  157  - Overrides accelerators for all shortcuts used to edit text.
  158 
  159 QLibrary
  160 --------
  161 
  162  - Static overload for resolve as a convenience function.
  163 
  164 New function:
  165 	static void *resolve( const QString &filename, const char * );
  166 
  167 QListView
  168 ---------
  169 
  170  - A bug that was introduced in Qt 3.0.0 beta 2 made listviews with
  171    lots of items very slow. This problem has been fixed.
  172 
  173 QProcess
  174 --------
  175 
  176  - exitStatus() did not work for negative values on Unix. This is fixed
  177    now.
  178  - Fixed problems on Unixware.
  179 
  180 QRichtext
  181 ---------
  182 
  183  - Fixed searching backwards.
  184  - Fixed some BIDI text-rendering problems.
  185 
  186 QSound
  187 ------
  188 
  189  - Simplified the API to allow easier extension.
  190 
  191 New functions:
  192 	bool isAvailable();
  193 	int loops() const;
  194 	int loopsRemaining() const;
  195 	void setLoops(int);
  196 	QString fileName() const;
  197 	bool isFinished() const;
  198 
  199 New slot:
  200 	void stop();
  201 
  202 Removed function:
  203 	bool available();
  204 
  205 QSpinBox
  206 --------
  207 
  208  - Spin box arrows were not updated correctly when the widget was
  209    disabled/enabled. This problem is fixed now.
  210  - Improved handling of the case when a spinbox accepts a value: now it
  211    also accepts it if the spinbox loses focus or is hidden.
  212 
  213 QSqlCursor
  214 ----------
  215 
  216  - Add functions to set the generated flag. This is used to avoid the
  217    generation of malformed SQL statements.
  218 
  219 New functions:
  220 	void setGenerated( const QString& name, bool generated );
  221 	void setGenerated( int i, bool generated );
  222 
  223 QSqlDriver
  224 ----------
  225 
  226  - Add new function hasFeature( QSqlDriver::DriverFeature ) const which
  227    allows you to query whether the driver supports features like SQL
  228    transactions or Binary Large Object fields. The functions
  229    hasQuerySizeSupport(), canEditBinaryFields() and hasTransactionSupport()
  230    are therefore obsolete and have been removed.
  231 
  232 New function:
  233 	bool hasFeature( QSqlDriver::DriverFeature ) const;
  234 
  235 Removed functions:
  236 	bool hasQuerySizeSupport() const;
  237 	bool canEditBinaryFields() const;
  238 	bool hasTransactionSupport() const;
  239 
  240 QSqlField
  241 ---------
  242 
  243  - The bool argument of setNull() was removed since it does not make sense
  244    to set a field to non null.
  245 
  246 QTabWidget
  247 ----------
  248 
  249  - Use the functions below to add tool tips to the individual tabs in a
  250    QTabWidget.
  251 
  252 New functions:
  253 	void removeTabToolTip( QWidget * w );
  254 	void setTabToolTip( QWidget * w, const QString & tip );
  255 	QString tabToolTip( QWidget * w ) const;
  256 
  257 QTabBar
  258 -------
  259 
  260  - Use the functions below to add tool tips to the individual tabs in a
  261    QTabBar.
  262 
  263 New functions:
  264 	void removeToolTip( int id );
  265 	void setToolTip( int id, const QString & tip );
  266 	QString toolTip( int id ) const;
  267 
  268 QTextStream
  269 -----------
  270 
  271  - The global functions setw(), setfill() and setprecison() were deleted
  272    since they conflict with the std classes. If you need the functionality,
  273    use qSetW(), qSetFill() and qSetPrecision() instead.
  274 
  275 Removed functions:
  276 	QTSManip setw( int w )
  277 	QTSManip setfill( int f )
  278 	QTSManip setprecision( int p )