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    1 Qt 3.0 Beta4 is not binary compatible with Beta3; any programs linked
    2 against Beta3 must be recompiled.
    3 
    4 Below you will find a description of general changes in the Qt
    5 Library and Qt Designer followed by a detailed list of changes in the
    6 API.
    7 
    8 
    9 The Qt Library
   10 ========================================
   11 
   12 Documentation
   13 -------------
   14 
   15 The extensive revision of the documentation is almost complete.
   16 We have added new navigation options, including a shorter list
   17 of classes entitled Main Classes.
   18 
   19 Translations
   20 ------------
   21 
   22 Qt now includes French and German translations of the Qt library, as
   23 well as a template for translating Qt. These files are found in the
   24 translations directory of Qt, in both .ts and .qm formats.
   25 
   26 Style Fixes
   27 -----------
   28 
   29 Qt 3.0.0 beta2 introduced a new QStyle API. This new API has changed
   30 between beta3 and beta4. These changes will affect both widget
   31 writers and style writers. The QStyle entry below explains what has
   32 changed.
   33 
   34 Beta4 also introduces some fixes for bugs introduced during the port
   35 to the new API in various widgets, notably QComboBox and QSlider.
   36 
   37 LiveConnect Plugin
   38 ------------------
   39 
   40 A few bugs were fixed in the LiveConnect Plugin so that the grapher
   41 example works again on Windows.
   42 
   43 
   44 Qt Designer
   45 ========================================
   46 
   47  - General usability improvements and bug fixes, and improved file
   48    and project handling.
   49  - Updated designer manual to cover the .ui.h mechanism.
   50  - New auto-indentation algorithm in the code editor.
   51 
   52 
   53 Qt Assistant
   54 ========================================
   55 
   56  - Added a Settings dialog and made more features customizable.
   57  - Sessions are now saved and restored.
   58  - A brief introduction to using Qt Assistant is now included.
   59 
   60 
   61 Qt Linguist
   62 ========================================
   63 
   64  - Phrase books are now provided in tools/linguist/phrasebooks.
   65  - Added support for Qt Designer's .ui.h mechanism to lupdate.
   66  - Support for a larger subset of .pro file syntax in lupdate and
   67    lrelease.
   68 
   69 
   70 Qt Functions
   71 ========================================
   72 
   73 QApplication
   74 ------------
   75 
   76  - Ignore drag-and-drop events for disabled widgets.
   77  - Always send ChildRemoved events, even if no ChildInserted event
   78    was sent.
   79  - Mouse events for popup menus are now sent to event filters.
   80 
   81 QCanvasItem
   82 -----------
   83 
   84  - The functions visible(), selected() and active() have been renamed
   85    setVisible(), setSelected() and setActive().
   86 
   87 New functions:
   88 	bool isVisible() const;
   89 	bool isSelected() const;
   90 	bool isActive() const;
   91 
   92 Removed functions:
   93 	bool visible() const;
   94 	bool selected() const;
   95 	bool active() const;
   96 
   97 QCanvasText
   98 -----------
   99 
  100  - Fixed alignment flags.
  101 
  102 QChar
  103 -----
  104 
  105 New function:
  106 	bool isSymbol() const;
  107 
  108 QCheckBox
  109 ---------
  110 
  111  - Fixed a bug in pixmap caching which could result in using the
  112    wrong pixmap.
  113 
  114 QCheckListItem
  115 --------------
  116 
  117  - After a mouse click, the list view ignores the following double
  118    click as in Windows XP.
  119 
  120 QClipboard
  121 ----------
  122 
  123  - Made clipboard operations faster on X11.
  124 
  125 QColorDialog
  126 ------------
  127 
  128  - Never show scrollbars in the color array.
  129 
  130 QComboBox
  131 ---------
  132 
  133  - Comboboxes are now drawn correctly in all styles.
  134  - Fixed bug with auto completion. There was undefined behavior with
  135    non-editable comboboxes when changing focus.
  136 
  137 New function:
  138 	virtual void setCurrentText( const QString& );
  139 
  140 New property:
  141 	QString currentText
  142 
  143 QDataBrowser
  144 ------------
  145 
  146  - The setCursor() function is obsolete and will be removed for Qt 3
  147    release due to the incompatibility with some compilers. Use
  148    setSqlCursor() instead.
  149 
  150 QDataTable
  151 ----------
  152 
  153  - Dates and times in tables can now be displayed in different
  154    display formats.
  155  - The setCursor() function is obsolete and will be removed for Qt 3
  156    release due to the incompatibility with some compilers. Use
  157    setSqlCursor() instead.
  158 
  159 QDateEdit
  160 ---------
  161 
  162  - The default separator and the day-month-year order respect the
  163    user's settings.
  164  - Pressing the separator key now skips to the next section.
  165  - Fixed a usability flaw related to some months being longer than
  166    others.
  167 
  168 New functions:
  169 	QString separator() const;
  170 	virtual void setSeparator( const QString& s );
  171 
  172 QDateTime
  173 ---------
  174 
  175  - Always initialize the tm struct completely. This fixes a problem
  176    on some versions of Unix.
  177 
  178 QDir
  179 ----
  180 
  181  - QDir::homeDirectory() now always returns an existing directory on
  182    Windows.
  183 
  184 QDockWindows
  185 ------------
  186 
  187  - Fixed dockwindows created in non-dock areas.
  188  - Fixed constructor if InDock and the parent is a QMainWindow.
  189 
  190 QDom...
  191 -------
  192 
  193  - Fixes in the conversion of the DOM tree to a string.
  194 
  195 QDomNodeList
  196 ------------
  197 
  198  - Fixed a crash.
  199 
  200 QFileDialog
  201 -----------
  202 
  203  - Select contents of the line edit at startup (if any) so that the
  204    user can overwrite the provided file name right away.
  205 
  206 QFileInfo
  207 ---------
  208 
  209  - In adition to lastModified() and lastRead(), provide created().
  210 
  211 New function:
  212 	QDateTime created() const;
  213 
  214 QFont
  215 -----
  216 
  217  - Provide more correct font metrics under X11.
  218  - Worked around X11 limits on length of strings to draw and on
  219    coordinate sizes.
  220  - Fixed sone point vs. pixel size issues under X11.
  221  - Added PreferAntialias and NoAntialias flags to StyleStrategy enum
  222    type.
  223 
  224 QFtp
  225 ----
  226 
  227  - Fixed a QSocket bug that made QFtp crash if the connection was
  228    refused.
  229  - Fixed operationRename() and operationRemove().
  230  - Set the right state when finished.
  231 
  232 QGIFFormat
  233 ----------
  234 
  235  - Support GIF files with broken logical screen size.
  236 
  237 QHeader
  238 -------
  239 
  240  - Added support for '\n' in header labels.
  241  - Improved placement of icon.
  242 
  243 QHttp
  244 -----
  245 
  246  - If the status code of the reply is an error code, it is now also
  247    reflected in the status of the network operation. The error
  248    handling in general was improved.
  249 
  250 QImageIO
  251 --------
  252 
  253  - Allow gamma correction to be set programmatically.
  254 
  255 New functions:
  256 	void setGamma( float gamma );
  257 	float gamma() const;
  258 
  259 QKeyEvent
  260 ---------
  261 
  262  - Worked around an X11 bug in isAutoRepeat().
  263 
  264 QKeySequence
  265 ------------
  266 
  267 A new class that encapsulates a key sequence as used by accelerators.
  268 
  269 QLabel
  270 ------
  271 
  272  - Made the WordBreak alignment property work with rich text labels
  273    in addition to plain text labels.
  274 
  275 QLayout
  276 -------
  277 
  278  - Fixed crashes with deleting widgets managed by the layout.
  279  - Fixed problems with reparenting widgets managed by the layout.
  280  - Respect maximumHeight() of items in heightForWidth().
  281 
  282 QLibrary
  283 --------
  284 
  285  - Plugins now return the version number, threading model and debug
  286    vs. release mode of the Qt library used in ucm_initialize(). If
  287    there is any kind of incompatibility, cancel the loading.
  288 
  289 QLineEdit
  290 ---------
  291 
  292  - Update the "edited" flag and the accessibility data better than
  293    before.
  294  - Fixed setMaxLength().
  295  - Fixed context menu problem on Windows.
  296 
  297 New functions:
  298 	bool isUndoAvailable() const;
  299 	bool isRedoAvailable() const;
  300 
  301 QListViewItem
  302 -------------
  303 
  304  - Fixed setVisible(TRUE) which triggered an update too soon.
  305 
  306 QMenuBar
  307 --------
  308 
  309  - Cancel alt-activation of menubar on mouse press/release.
  310  - On wheel events, all popup menus are now closed instead of hidden.
  311    Hiding popup menus confused QMenuBar.
  312 
  313 QObject
  314 -------
  315 
  316  - Have QObject dispatch events to customEvents().
  317 
  318 QPainter
  319 --------
  320 
  321  - Renamed the enum type ClipMode to CoordinateMode. The enum values
  322    ClipDevice and ClipPainter are now called CoordDevice and
  323    CoordPainter.
  324  - Fixed escaping of ampersand character, so "&&", "&&&", etc., now
  325    work as they did in Qt 2.x.
  326 
  327 New functions:
  328 	void drawPixmap( const QRect& r, const QPixmap& pm );
  329 	void drawImage( const QRect& r, const QImage& img );
  330 
  331 QPicture
  332 --------
  333 
  334  - Respect the size of a loaded SVG document.
  335  - Solved a replay-transformed-picture problem.
  336  - Fixed format version number.
  337 
  338 QPluginManager
  339 --------------
  340 
  341  - Fixed crash when loading a plugin fails.
  342 
  343 QPopupMenu
  344 ----------
  345 
  346  - Custom menu items that are separators now see their size hint
  347    respected.
  348  - Fixed crash when drawing an empty popup menu.
  349 
  350 QPrinter
  351 --------
  352 
  353  - Better printing in different resolutions under both Windows and
  354    X11.
  355  - Support for collation under Windows and X11.
  356  - Correct bounding rectangles for texts in all printer modes.
  357  - Fixed pixmap printing on Windows.
  358  - Fixed PostScript font names for fonts with foundries.
  359  - Support for PostScript printing of scaled images.
  360 
  361 New functions:
  362 	bool collateCopiesEnabled() const;
  363 	void setCollateCopiesEnabled( bool enable ) const;
  364 	bool collateCopies() const;
  365 	void setCollateCopies( bool on );
  366 	int winPageSize() const; /* Windows only */
  367 
  368 QProcess
  369 --------
  370 
  371  - The function hangUp() was renamed to tryTerminate() to make the
  372    purpose more clear. Furthermore, under Unix, the signal that is
  373    sent was changed from SIGHUP to SIGTERM.
  374  - The function kill() and the function tryTerminate() (formerly
  375    hangUp()) were made slots.
  376 
  377 New slots:
  378 	void tryTerminate();
  379 	void kill();
  380 
  381 Removed functions:
  382 	void hangUp();
  383 	void kill();
  384 
  385 QProgressBar
  386 ------------
  387 
  388  - Draw the progress bar correctly with respect to the properties
  389    "percentageVisible", "indicatorFollowsStyle" and
  390    "centerIndicator".
  391 
  392 QPtrVector
  393 ----------
  394 
  395  - Support null items without triggering an assert.
  396 
  397 QPushButton
  398 -----------
  399 
  400  - Fixed the sizeHint() of buttons with an icon.
  401 
  402 QRegExp
  403 -------
  404 
  405  - Fixed a subtle bug in regular expressions mixing anchors and
  406    alternation.
  407 
  408 QRegion
  409 -------
  410 
  411  - Don't crash when creating a QRegion from an empty point array.
  412 
  413 QRichText
  414 ---------
  415 
  416  - Improved alignment support, including nested alignments.
  417  - Improved table margin support.
  418  - Improved page break algorithm.
  419  - Do not eat '\n' in preformatted items.
  420  - Do not draw the internal trailing space at the end of a paragraph.
  421  - Fixed link underlining in table cells and other subdocuments.
  422  - Use larger vertical margin between paragraphs.
  423  - Display paragraph spacing even when printing.
  424  - Support vertical table cell alignment.
  425  - Fix for floating items and table cell size calculation.
  426  - Improved allignment handling.
  427  - Offset fixes for tabs.
  428  - Better <div> support.
  429  - Fixed <br> tag.
  430  - Fix for the <center> tag and centering tables.
  431  - Fixed &nbsp; and <nobr>.
  432  - Fixed off-by-one bug in gotoWordLeft() and gotoWordRight().
  433  - Better positioning of super- and subscripts.
  434  - Faster printing of large tables by using a clipping rectangle.
  435  - Improved high-resolution printing.
  436  - Correct sizes for images when printing.
  437  - Fixed list painting when printing.
  438  - Use right background for printing.
  439 
  440 QScrollBar
  441 ----------
  442 
  443  - Made setValue() a slot.
  444 
  445 New slot:
  446 	void setValue( int );
  447 
  448 Removed function:
  449 	void setValue( int );
  450 
  451 QSettings
  452 ---------
  453 
  454  - Added support for QStringLists without requiring a distinct
  455    separator.
  456  - Added support for null strings, empty lists and null strings in
  457    lists.
  458  - Fixed bug with values ending with a backslash.
  459  - On Unix, don't overwrite files if the user doesn't have permission.
  460 
  461 QSimpleRichText
  462 ---------------
  463 
  464  - Implemented vertical breaks and floating elememts.
  465  - Fixed bug with borders and clipping in printing.
  466  - Fixed bug in adjustSize() cache.
  467 
  468 QSizePolicy
  469 -----------
  470 
  471  - Stretch factors were added to QSizePolicy.
  472  - Added a new size policy: Ignored.
  473 
  474 New functions:
  475 	uint horStretch() const;
  476 	uint verStretch() const;
  477 	void setHorStretch( uchar sf );
  478 	void setVerStretch( uchar sf );
  479 
  480 QSpinBox
  481 --------
  482 
  483 New slot:
  484 	virtual void selectAll();
  485 
  486 QSqlDatabase
  487 ------------
  488 
  489  - QSqlDatabase now provides access to meta-data. Meta-data is stored
  490    in two new classes, QSqlFieldInfo and QSqlRecordInfo. See the
  491    class documentation for details.
  492 
  493 New Functions:
  494 	QSqlRecordInfo recordInfo ( const QString & tablename ) const
  495 	QSqlRecordInfo recordInfo ( const QSqlQuery & query ) const
  496 
  497 
  498 QSqlFieldInfo
  499 -------------
  500 
  501 A new class that stores meta data associated with a SQL field.
  502 
  503 QSqlRecordInfo
  504 --------------
  505 
  506 A new class that is keeping a set of QSqlFieldInfo objects.
  507 
  508 QStatusBar
  509 ----------
  510 
  511  - Don't cut off the bottom line of the border of the status bar.
  512  - Respect maximumHeight() of items in the status bar.
  513 
  514 QString
  515 -------
  516 
  517  - QString now provides section(), a function that parses simple
  518    fields.
  519  - The function similarityWith() has been removed from the API. If
  520    you need it, write to qt-bugs@trolltech.com.
  521 
  522 New functions:
  523 	QString section( QChar sep, int start, int end,
  524 			 int flags = SectionDefault ) const;
  525 	QString section( char sep, int start, int end = 0xffffffff,
  526 			 int flags = SectionDefault ) const;
  527 	QString section( const char *substr, int start, int end = 0xffffffff,
  528 			 int flags = SectionDefault ) const;
  529 	QString section( QString substr, int start, int end = 0xffffffff,
  530 			 int flags = SectionDefault ) const;
  531 	QString section( const QRegExp &regxp, int start, int end = 0xffffffff,
  532 			 int flags = SectionDefault ) const;
  533 	
  534 Removed function:
  535 	int similarityWith( const QString& target ) const;
  536 
  537 QStyle
  538 ------
  539 
  540  - Changed "void **" technique to QStyleOption technique. This
  541    affects the interface of most of the QStyle member functions.
  542    Please read the QStyle class documentation for details.
  543 
  544 QStyleOption
  545 ------------
  546 
  547 A new class that encapsulates extra data sent to the style API.
  548 
  549 QTabBar
  550 -------
  551 
  552  - The accelerators are now working correctly after changing a tab.
  553 
  554 QTable
  555 ------
  556 
  557  - Fixed crash related to popup menu and cell edition.
  558  - Fixed not-drawing hidden cells.
  559 
  560 QTextCodec
  561 ----------
  562 
  563  - Added MIME names for codecs.
  564  - Improved locale detection.
  565  - Fixed the ISO 8859-6.8x (Arabic) font encoding.
  566 
  567 New function:
  568 	const char *mimeName() const;
  569 
  570 QTextStream
  571 -----------
  572 
  573  - Fixed bug with stateful QTextEncoders.
  574 
  575 QTextEdit
  576 ---------
  577 
  578  - Respect disabling updates.
  579  - Fixed link underlining in table cells and other subdocuments.
  580  - Draw cursor on focus in.
  581  - Emit cursorPositionChanged() where it previously was missing.
  582  - Fixed sync().
  583 
  584 New functions:
  585 	bool isUndoAvailable() const;
  586 	bool isRedoAvailable() const;
  587 	bool isUndoRedoEnabled() const;
  588 	virtual void setUndoRedoEnabled( bool enabled ) const;
  589 
  590 New property:
  591 	bool undoRedoEnabled
  592 
  593 QThread
  594 -------
  595 
  596  - Fixed QThread::sleep() on Unix.
  597 
  598 QTime
  599 -----
  600 
  601  - fromString() with format Qt::ISODate now recognizes milliseconds
  602    if they are specified.
  603  - Make elapsed() a const function.
  604 
  605 QTimeEdit
  606 ---------
  607 
  608  - The default time separator respects the user's settings.
  609  - Pressing the separator key now skips to the next section.
  610 
  611 New functions:
  612 	QString separator() const;
  613 	virtual void setSeparator( const QString& s );
  614 
  615 QTooltip
  616 --------
  617 
  618  - Hide active tooltips when the user switches to another application.
  619  - Fixed tooltips with Windows effects enabled.
  620 
  621 QUrl
  622 ----
  623 
  624  - Fixed password encoding.
  625 
  626 New function:
  627 	bool hasPort() const;
  628 
  629 QValidator
  630 ----------
  631 
  632  - Let QValidator, QIntValidator, QDoubleValidator and
  633    QRegExpValidator have QObject parents rather than only QWidget
  634    parents.
  635 
  636 QVariant
  637 --------
  638 
  639  - Added QBitArray support.
  640  - The QDateTime type now supports asDate() and asTime().
  641  - The QByteArray type now supports toString().
  642 
  643 New functions:
  644 	QVariant( const QBitArray& );
  645 	const QBitArray toBitArray() const;
  646 	QBitArray& asBitArray();
  647 
  648 QWhatsThis
  649 ----------
  650 
  651  - Added support for hyperlinks in "What's This?" help windows.
  652 
  653 QWidget
  654 -------
  655 
  656  - Fixed crashes related to LayoutHint events.
  657 
  658 QWizard
  659 -------
  660 
  661  - Made removePage() behave as documented.
  662  - Fixed back() so that it skips irrelevant pages like next().
  663 
  664 QWorkspace
  665 ----------
  666 
  667  - Make sure that the widget state is set before the first titlebar
  668    painting is triggered.
  669  - Use the right pixmap for titlebar.
  670  - Respects widget flags better for titlebars in QCommonStyle.
  671  - Fixed move and resize in the system menu bar of workspace
  672    children.
  673 
  674 QXml
  675 ----
  676 
  677  - Made the "prefix" xmlns map to the namespace name
  678    http://www.w3.org/2000/xmlns/.
  679  - Fixed default namespaces.
  680 
  681 QXmlAttributes
  682 --------------
  683 
  684  - Added count() as equivalent to length() to be consistent with Qt
  685    conventions.
  686 
  687 New function:
  688 	int count() const;