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1 Qt 4.1 introduces many new features as well as many improvements and
2 bugfixes over the 4.0.x series. For more details, see the online
3 documentation which is included in this distribution. The
4 documentation is also available at http://qt.nokia.com/doc/
5
6 The Qt version 4.1 series is binary compatible with the 4.0.x series.
7 Applications compiled for 4.0 will continue to run with 4.1.
8
9 ****************************************************************************
10 * General *
11 ****************************************************************************
12
13 Qt library
14 ----------
15
16 - Integrated support for rendering Scalable Vector Graphics (SVG)
17 drawings and animations (QtSvg module).
18
19 - A Portable Document Format (PDF) backend for Qt's printing system.
20
21 - A unit testing framework for Qt applications and libraries.
22
23 - Modules for extending Qt Designer and dynamic user interface
24 building.
25
26 - New proxy models to enable view-specific sorting and filtering of
27 data displayed using item views.
28
29 - Additional features for developers using OpenGL, such as support
30 for pixel and sample buffers.
31
32 - A flexible syntax highlighting class based on the Scribe rich text
33 framework.
34
35 - Support for network proxy servers using the SOCKS5 protocol.
36
37 - Support for OLE verbs and MIME data handling in ActiveQt.
38
39 Qt Designer
40 -----------
41
42 - Added support for editing menu bars and tool bars.
43
44 - Added support for adding comments to string properties.
45
46 - Added new static QtForm library with improved
47 QForm::Loader API for loading designer forms at run-time.
48
49 - Added support for namespaces in uic generated code.
50
51 - Added support for dock widgets in main windows.
52
53 - Added support for editing table, tree and list widgets.
54
55 - Improved palette editing and resource support.
56
57 QTestLib
58 --------
59
60 - Added QTestLib, the Qt Unit Testing Library. See the "QTestLib" chapter
61 in the Qt documentation for more information.
62
63 - Users of older versions of QtTestLib can use the updater utility in
64 tools/qtestlib/updater to convert existing autotests to work with QTestLib.
65
66 Boost
67 -----
68
69 Added boost compatible syntax for declaring signals and slots. If you
70 define the macro QT_NO_KEYWORDS "Q_SIGNALS" and "Q_SLOTS" are
71 recognized as keywords instead of the default "signals" and "slots".
72
73 ActiveQt
74 --------
75
76 QAxServer now supports mime-type handling - a ActiveX control can be
77 registered to handle a certain file extension and mime-type, in which case
78 QAxBindable::load and QAxBindable::save can be reimplemented to serialize
79 the object.
80
81 Build system
82 ------------
83
84 Added support for linking static plugins into the application.
85
86 Qt 3 to 4 Porting Tool
87 ----------------------
88
89 Q(V|H)BoxLayout and QGridLayout usage is now ported to use
90 Q3(V|H)BoxLayout/Q3GridLayout, to retain the margin/spacing
91 behavior as in Qt 3.
92
93 Meta Object Compiler (moc)
94 --------------------------
95
96 - Added support for const signals.
97
98 Qt Assistant
99 ------------
100
101 - Added -docPath command line option for easy setting of the
102 document root path.
103
104 QMake
105 -----
106
107 - Added support for new FORMS3 profile variable to make it possible
108 to have Qt Designer forms from Qt 3 and Qt 4 in the same project.
109
110 - Added support for precompiled headers on win32-g++ (MinGW)
111
112 Compilers
113 ---------
114
115 Added support for Solaris 10 on AMD64 with the compiler provided by
116 Sun.
117
118
119 ****************************************************************************
120 * Library *
121 ****************************************************************************
122
123
124 New classes
125 -----------
126
127 - QTreeWidgetItemIterator
128 Added iterator to help iterating over items in a QTreeWidget.
129
130 - QSortingProxyModel
131 The QSortingProxyModel can contain another model and handles
132 the sorting of it.
133
134 - QFilteringProxyModel
135 Allows you to provide a subset of a model to a view.
136
137 - QStringFilterModel
138 Allows you to provide a subset of a model to a view based on a
139 regular expression.
140
141 - QSyntaxHighlighter
142 The QSyntaxHighlighter class allows you to define syntax
143 highlighting rules.
144
145 - QAbstractFileEngine
146 A base class for implementing your own file and directory handling
147 back-end for QFile, QFileInfo and QDir.
148
149 - QAbstractFileEngineHandler
150 For registering a QAbstractFileEngine subclass with Qt.
151
152 - QFSFileEngine
153 The default file engine for regular file and directory access in Qt.
154
155 - Q3(H|V)BoxLayout and Q3GridLayout
156 Layout classes provided for compatibility that behave the same
157 as the Qt 4 classes but use a zero margin/spacing by default,
158 just like in Qt 3.
159
160 - Added qFromLittleEndian, qToLittleEndian, qFromBigEndian and
161 qToBigEndian endian helper conversion functions (qendian.h)
162
163 - Q_EXPORT_PLUGIN2 macro
164 Obsoletes Q_EXPORT_PLUGIN and allows static linking of
165 plugins.
166
167 - Q3ComboBox
168 For enhanced backwards compatibility with Qt 3.
169
170 - QGLPbuffer
171 For creating and managing OpenGL pixel buffers.
172
173 - QNetworkProxy
174 For setting up transparent (SOCKS5) networking proxying.
175
176 - QDirectPainter (Qtopia Core only)
177 Provides direct access to video framebuffer hardware.
178
179
180 General improvements
181 --------------------
182
183 - QByteArray
184 Added toLong() and toULong().
185
186 - QFileDialog
187 Fix shortcut and focus for "Alpha channel" spinbox.
188
189 - QLinkedList
190 Added conversion methods to convert from/to STL lists.
191
192 - QMap/QHash
193 Fixed operator>>() to read back multiple values associated
194 to a same key correctly.
195 Added constFind(), for finding an item without causing a detach.
196
197 - QMap/QHash
198 Const-correctness in const_iterator's operator--(int).
199
200 - QMainWindow
201 The saveState() and restoreState() functions no longer
202 fallback to using the windowTitle property when the objectName
203 property is not set on a QToolBar or QDockWidget; this
204 behavior was undocumented and has been removed.
205
206 - QToolBar
207 Added Qt 3 compatibility signal visibilityChanged(bool).
208
209 - QMetaType
210 Class is now fully reentrant.
211 Metatypes can be registered or queried from multiple threads.
212 Added qMetaTypeId<T>(), which returns the meta type ID of T at compile time.
213
214 - QMetaProperty
215 Added isResettable().
216
217 - QSql
218 Oracle plugin adds support for authentication using external credentials.
219 Added isValid() to QSqlError.
220
221 - QThread
222 Added setPriority() and priority(), for querying and setting
223 the priority of a thread.
224
225 - QTreeWidgetItem/QTreeWidget
226 Added new constructors and addChildren(), insertChildren(),
227 takeChildren(), insertTopLevelItems(), addTopLevelItems to
228 speed up insertion of multiple items.
229
230 - QTextDocument
231 Added the class QTextBlockUserData and added the possibility
232 of storing a state or custom user data in a QTextBlock
233 Added useDesignMetrics property, to enable the use of design metrics for
234 all fonts in a QTextDocument.
235
236 - QTextFormat
237 Added support for setting the font pixel size.
238 Added UserObject to QTextFormat::ObjectTypes enum.
239
240 - QMetaType
241 The value of QMetaTypeId<T>::Defined indicates whether a given type T is
242 supported by QMetaType.
243
244 - QAbstractItemView
245 Added setIndexWidget() and indexWidget() which makes it
246 possible to set a widget at a given index.
247
248 Added a QAbstractItemView::ContiguousSelection mode.
249 Added scrollToTop() and scrollToBottom().
250
251 - QAbstractItemModel
252 Added a SizeHintRole that can be set for each item. The item
253 delegate will now check for this value before computing the
254 size hint based on other item data.
255
256 Add QModelIndex::operator<() so we are able to use them in
257 QMap and other containers.
258
259 Added qHash function for QModelIndex.
260
261 - QTableWidget
262 Added cellWidget() and setCellWidget() which makes it possible
263 to set a widget at a specified cell.
264
265 Added setCurrentCell().
266
267 Added QTableWidgetItem copy constructors.
268
269
270 - QTreeWidget
271 Added setItemWidget() and itemWidget() which makes it possible
272 to set a widget on an item.
273
274 - QListWidget
275 Added setItemWidget() and itemWidget() which makes it possible
276 to set a widget on an item.
277
278 Added QListWidgetItem copy constructors.
279
280 - QMutableMapIterator
281 Added value() overloads to Java-style iterators that return
282 non-const references.
283
284 - QTextTable
285 Added mergeCells() and splitCells() to be able to set the row
286 or column span on a table cell.
287
288 - QStyle
289 Added standardIcon() which returns a default icon for standard
290 operations.
291 Added State_ReadOnly, which is enabled for read-only widgets.
292
293 Renamed QStyleOption::init() to initFrom().
294 - QGroupBox is now completely stylable (QStyleOptionGroupBox)
295 - Indeterminate (busy) progress bars are now animated properly
296 in all styles.
297
298 Added PM_DockWidgetTitleMargin as pixel metric.
299
300 - QHash
301 Make it possible to use QHash with a type that has no default
302 constructor.
303
304 - QTableView
305 Made QTableView::setShowGrid() a slot, like in Qt 3.
306 Added setRowHeight() and setColumnWidth().
307
308 - QTableWidgetSelectionRange
309 Added rowCount() and columnCount() convenience functions.
310
311 - QSettings
312 Added support for custom formats in QSettings.
313
314 - QTextStream
315 Added status(), setStatus() and resetStatus() for improved error handling.
316 Added read(qint64 maxlen), for reading parts of a text stream into a
317 QString.
318
319 - QTextCursor
320 Added support for BlockUnderCursor selection type.
321
322 - QHeaderView
323 Added defaultSectionSize property which tells the default size
324 of the header sections before resizing.
325
326 - QScrollBar
327 Added context menu to the scrollbar with default navigation
328 options.
329
330 - QScrollArea
331 Added ensureVisible(), which can scroll the scrollarea to make sure a
332 specific point is visible.
333
334 - QDateTime
335 Added addMSecs(), which adds a number of milliseconds to the QDateTime.
336
337 - QDateTimeEdit
338 Added support for more date/time formats.
339 Now allows multiple sections of the same type.
340
341 - QButtonGroup
342 Added handling of buttons with IDs to the buttongroup like in
343 Qt 3.
344
345 - QIODevice
346 Added peek() for peeking data from a device.
347
348 - QTextEdit
349 Added property tabStopWidth which sets the tab stop width in
350 pixels.
351 append(const QString &) is now a public slot.
352 Added support for inserting Unicode control characters through the
353 context menu.
354 Added property acceptRichText, for whether or not the text edit
355 accepts rich text insertions by the user.
356 Added overwriteMode property.
357
358 - QDataStream
359 Added skipRawData().
360 Added support for QRegExp.
361
362 - QProgressBar
363 Added support for vertical progress bars.
364
365 - QImageIOHandler
366 The name() function has been obsoleted; use format() instead.
367 Added QImageIOHandler::Animation, for determining if the image format
368 supports animation.
369 Added QImageIOHandler::BackgroundColor, for setting the background
370 color for the image loader.
371
372 - QImageReader
373 Added setBackgroundColor() and backgroundColor(), for setting the
374 background color of an image before it is read.
375 Added supportsAnimation(), for checking if the image format supports
376 animation.
377
378 - QImageWriter
379 Added support for saving image text.
380
381 - QLocale
382 Added dateFormat()/timeFormat() to query the date/time format for the
383 current locale.
384 Added toString() overloads for localized QTime and QDate output.
385 Added decimalPoint(), groupSeparator(), percent(), zeroDigit(),
386 negativeSign() and exponential(), which provide a means to generate
387 custom number formatting.
388
389 - QHostInfo
390 Added support for reverse name lookups.
391
392 - QHostAddress
393 Added a QString assignment operator
394 Added convenience functions for initializing from a native sockaddr
395 structure.
396 Added support for the IPv6 scope-id.
397
398 - QPrinter
399 Added property "embedFonts" for embedding fonts into the target
400 document.
401 Added support for printing to PDF.
402 Added support for custom print and paint engines
403
404 - QPrintEngine
405 Added PPK_SuppressSystemPrintStatus, for suppressing the printer
406 progress dialog on Mac OS X.
407
408 - QKeySequence
409 Added fromString() and toString() for initializing a key sequence
410 from, and exporting a key sequence to a QString.
411
412 - QUrl
413 Added the port(int) function, which provides a default value for the
414 port if the URL does not define a port.
415 Support for decoding Punycode encoded hostnames in URLs.
416 Made the parser more tolerant for mistakes, and added a ParsingMode
417 flag for selecting strict or tolerant parsing.
418 Added support for the NAMEPREP standard in our i18n domain name support.
419
420 - QDir
421 Added the filter QDir::NoDotAndDotDot, for the
422 special directories "." and "..".
423 Added the filter QDir::AllEntries, for all entries
424 in a directory, including symlinks.
425
426
427 - QAbstractSocket
428 Added slots connectToHostImplementation() and
429 disconnectFromHostImplementation() to provide polymorphic behavior for
430 connectToHost() and disconnectFromHost().
431
432 - QMenuBar
433 Added setActiveAction(), which makes the provided action
434 active.
435
436 - QProxyModel
437 This class has been obsoleted (see QAbstractProxyModel)
438
439 - QWidget
440 Now supports three modes of modality: NonModal, WindowModal and
441 ApplicationModal.
442 Added Qt::WindowModality, obsoleted WA_ShowModal and WA_GroupLeader.
443 Added Qt::WA_OpaquePaintEvent widget attribute, obsoleting Qt::WA_NoBackground.
444 Added boolean autoFillBackground property.
445 Child widgets now always inherit the contents of their parent.
446
447 - QPalette
448 Added QPalette::Window (obsoletes Background) and
449 QPalette::WindowText (obsoletes Foreground).
450
451 - QHttpResponseHeader
452 Added two constructors and the function setStatusLine() for generating
453 a response header.
454
455 - QBitArray
456 Added count(bool), for counting on and off-bits in a bit array.
457
458 - QVariant
459 Added support for QRegExp
460
461 - QRegExpValidator
462 Added the property "regExp".
463
464 - QTabBar
465 Added the property "iconSize", for setting the size of the icons on
466 the tabs.
467
468 - QLineEdit
469 Added support for inserting Unicode control characters through the
470 context menu.
471
472 - QString
473 Added toLong() and toULong().
474 Support for std::string conversions with embedded \0 characters.
475
476 - QRegion
477 Added translate(), like QRect::translated().
478
479 - QProcess
480 Added systemEnvironment(), which returns the environment variables
481 of the calling process.
482 Added exitStatus(), and added a new finished() signal which takes the
483 exit status as a parameter.
484
485 - QComboBox
486 Made setCurrentIndex() a slot.
487
488 - QFontDataBase
489 Added styleString(), for retrieving the style string from a QFontInfo.
490 Added support for Myanmar fonts.
491
492 - QFontMetrics
493 Added xHeight(), which returns the 'X' height of the font.
494
495 - QCoreApplication
496 Added arguments(), which returns a list of command line arguments as a
497 QStringList.
498
499 - QTcpSocket
500 Added support for SOCKS5 via setProxy().
501
502 - QUdpSocket
503 Added property "bindMode", for binding several sockets to the same
504 address and port.
505
506 - QPen
507 Added support for custom dash pattern styles and miter limits.
508 Added support for QDebug.
509
510 - QDebug
511 Added support for QVector and QPair output.
512
513 - QStringListModel
514 Added support for sorting.
515
516 - QOpenGLPaintEngine
517 Gradients in the OpenGL paint engine are now drawn using
518 fragment programs, if the extension is available. Lots of
519 fixes, speedups and tweaks.
520
521
522 Platform-Specific changes
523 -------------------------
524
525 Windows:
526
527 - Painting
528 Added support for ClearType text rendering.
529
530 - File Engine
531 Added support for long filenames/paths.
532
533 X11:
534
535 - QWidget
536 Added support for freedesktop.org startup notifications.
537
538 Mac OS X:
539
540 - Improved support for the VoiceOver accessibility tool in Mac OS 10.4
541 and later
542
543
544 3rd-party libraries
545 -------------------
546
547 - zlib
548 Upgraded to zlib 1.2.3.
549
550 - FreeType
551 Upgraded to FreeType 2.1.10.
552
553 - SQLite
554 Upgraded to SQLite 3.2.7