Changeset 846 for trunk/doc/src/qt4-intro.qdoc

Timestamp:

May 5, 2011, 5:36:53 AM (14 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

Location:

trunk

Files:

• . (modified) (1 prop)
• doc/src/qt4-intro.qdoc (modified) (15 diffs)

trunk/doc/src/qt4-intro.qdoc

@@ -1 +1 @@
 /****************************************************************************
 **
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
@@ -7 +7 @@
 ** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:FDL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Nokia.
+** Software or, alternatively, in accordance with the terms contained in a
+** written agreement between you and Nokia.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights.  These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3.0 as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU General Public License version 3.0 requirements will be
-** met: http://www.gnu.org/copyleft/gpl.html.
+** GNU Free Documentation License
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of this
+** file.
 **
 ** If you have questions regarding the use of this file, please contact
@@ -53 +39 @@
     3 compatibility support.
 
-    \tableofcontents
-
     \section1 New Technologies in Qt 4
 
@@ -77 +61 @@
     \section1 Recent Additions to Qt 4
 
-    The following features have been added to Qt since the first release of Qt 4:
+    The following features have been added to Qt since the first release of Qt 4.
+
+    In Qt 4.7:
+    \list
+    \o Declarative UI Development with \l{Qt Quick}, technologies for creating
+       fluid, dynamic user interfaces.
+    \o Support for \l{Bearer Management}{network bearer management}, enabling
+       features such as control over network interfaces and support for roaming
+       between networks.
+    \o Feature and performance improvements in QtWebKit, including a new tiled
+       backing store, control over scroll bars used in frames and framesets,
+       accelerated compositing and \l{The QtWebKit Bridge}{support for hybrid
+       development}.
+    \o General performance improvements, including the use of "alien widgets"
+       on Mac OS X, the QStaticText class for optimized text rendering, a new
+       \l{QPainter::drawPixmapFragments()}{API for rendering pixmap fragments}
+       and an updated version of the JavaScriptCore engine for the QtScript
+       module with improved performance.
+    \endlist
+
+    In Qt 4.6:
+    \list
+    \o Support for \l{The Symbian platform - Introduction to Qt}{the Symbian Platform}
+       as a mainstream Qt platform, with integration into the S60 framework.
+    \o The \l{The Animation Framework}{animation framework} allows animations to be
+       created using both widgets and graphics items.
+    \o The \l{The State Machine Framework}{state machine framework} provides a robust
+       state chart implementation based on Harel statecharts and SCXML.
+    \o Support for \l{QTouchEvent}{touch input} and \l{Gestures Programming}{gestures}
+       enable developers to create intuitive user interfaces for touch-based devices.
+    \o A \l{QWebElement}{DOM access API} for QtWebKit provides a cleaner and safer way
+       to access elements and structures of Web pages without the use of JavaScript.
+    \o A collection of performance improvements, covering QGraphicsView, QPixmapCache,
+       QNetworkAccessManager, QContiguousCache class, hardware-accelerated rendering
+       support through \l{OpenVG Rendering in Qt}{OpenVG}, and the removal of Win9x
+       support.
+    \o A collection of \l{QGraphicsEffect}{graphics effects} make it easy to apply
+       and simple effects to graphics items and combine them to produce more complex
+       effects.
+    \o Support for XML schema validation in the QtXmlPatterns module covering
+       large parts of version 1.0 of the specification.
+    \o Qt3D enablers, including math primitives for \l{QMatrix4x4}{matrix multiplication},
+       \l{QVector3D}{vectors}, \l{QQuaternion}{quaternions} (client-side), and an API
+       for \l{QGLShader}{vertex and fragment shaders}, GLSL/ES.
+    \o \l{QtMultimedia Module}{Multimedia services} providing low-level access to the
+       system's audio system.
+    \endlist
 
     In Qt 4.5:
@@ -103 +133 @@
     In Qt 4.4:
     \list
-    \o \l{QtWebkit Module}{Qt WebKit integration}, making it possible for developers
+    \o \l{Webkit in QT}{Qt WebKit integration}, making it possible for developers
     to use a fully-featured Web browser to display documents and access online
     services.
@@ -174 +204 @@
     \o New \l{Proxy Models}{proxy models} to enable view-specific sorting and
        filtering of data displayed using item views.
-    \o Support for \l{Installing Qt on Mac OS X}{universal binaries} on Mac OS X.
+    \o Support for \l{Installing Qt for Mac OS X}{universal binaries} on Mac OS X.
     \o Additional features for developers using \l{QtOpenGL}{OpenGL}, such as
     support for pixel and sample buffers.
@@ -226 +256 @@
     \row    \o \l{QAxContainer} \o ActiveQt client extension
     \row    \o \l{QAxServer}    \o ActiveQt server extension
-    \row    \o \l{QtAssistant}  \o Classes for launching Qt Assistant
+    \row    \o \l{QtHelp}       \o Classes for integrating online documentation
     \row    \o \l{QtDesigner}   \o Classes for extending and embedding Qt Designer
-    \row    \o \l{QtUiTools}       \o Classes for dynamic GUI generation
+    \row    \o \l{QtUiTools}    \o Classes for dynamic GUI generation
     \row    \o \l{QtTest}       \o Tool classes for unit testing
     \endtable
@@ -458 +488 @@
 
 /*!
+    \page qt4-7-intro.html
+    \title What's New in Qt 4.7
+
+    Qt 4.7 provides many improvements and enhancements over the
+    previous releases in the Qt 4 series. This document covers the
+    most important features in this release, separated by category.
+
+    A list of other Qt 4 features can be found on the \bold{\l{What's
+    New in Qt 4}} page.
+
+    \section1 Declarative UI Development with Qt Quick
+
+    \image quick_screens.png
+
+    Qt 4.7 introduces \l{Qt Quick}, the Qt UI Creation Kit. that enables
+    the creation of dynamic user interfaces, easier and more effective
+    than possible with existing UI technologies. This UI Creation Kit
+    consists of three technologies:
+
+    \list
+    \i QML is a declarative language oriented on JavaScript that utilizes
+    Qt's Meta-Object capabilities to enable designers and developers to
+    collaborate tightly and create animated and fluid user experiences,
+    using existing knowledge in script language and design.
+
+    \i Qt Declarative is a C++ library that provides the underlying engine,
+    which translates the declarative description of the UI in QML into
+    items on a QGraphicsScene. The library also provides APIs to bind
+    custom C++ types and elements to QML, and to connect the QML UI with
+    the underlying application logic written in C++.
+
+    \i Qt Creator has been improved to support interactive editing of
+    QML UIs through drag-and-drop. The text editor supports the QML
+    syntax and provides authoring assistance such as auto-completion,
+    error lookup, help lookup and easy preview of QML UI's. The Qt
+    Quick features in Qt Creator will be released with Qt Creator 2.1
+    \endlist
+
+    \section1 Network Bearer Management
+
+    Bearer Management controls the connectivity state of the system.
+    The new Bearer Management API in the QtNetwork module allows the
+    application to identify whether the system is online and how many
+    interfaces there are, as well as start and stop interfaces, or
+    roam transparently between access points.
+
+    QNetworkAccessManager uses this API for HTTP level roaming.
+
+    \section1 Feature Improvements in QtWebKit
+
+    The QGraphicsWebView class has a new tiled backing store, which
+    improves scrolling and zooming performance. You can even create
+    animated zoom-in or zoom-out effects (see
+    QWebSettings::TiledBackingStoreEnabled).
+
+    On mobile platforms, it is often useful to avoid displaying
+    separate scrollbars for iframes and framesets. If you switch on
+    frame flattening, QtWebKit will resize frames to fit their content
+    to avoid separate scrollbars (see
+    QWebSettings::FrameFlatteningEnabled).
+
+    Qt 4.7 adds support for accelerated compositing, which enhances
+    the performance of CSS animations and transitions. Read more in
+    \l{http://labs.trolltech.com/blogs/2010/05/17/qtwebkit-now-accelerates-css-animations-3d-transforms/}{this blog}.
+
+    For hybrid QtWebKit and C++ projects, Qt 4.7 has added support for
+    transporting \l{QPixmap}s between Qt C++ and WebKit. We have also
+    improved the documentation for hybrid development. Read more here:
+    \l{The QtWebKit Bridge}.
+
+    \section1 QtWebKit Performance Benchmarks
+
+    We have introduced a set of performance benchmarks for QtWebKit,
+    and made numerous improvements in rendering performance, page
+    loading performance, scrolling performance and CSS performance.
+    Here are some examples from the benchmarks run on a 64-bit Linux
+    workstation with the raster graphics system.
+
+    In a benchmark that measures the scrolling performance on popular
+    websites, we found out that Qt 4.7.0 on this platform is 350%
+    faster than Qt 4.6.0, thanks to several rendering related
+    improvements.
+
+    Our page loading benchmark shows an improvement of 16% in Qt 4.7.0
+    from Qt 4.6.0. This is due to improvements in text layout speed,
+    image decoding, resource loading and event handling.
+
+    Several CSS animation benchmarks indicate a speed improvement of
+    31% from Qt 4.6.0 to Qt 4.7.0. These benchmarks are effectively
+    showing the improvement we get from accelerated compositing (see
+    above).
+
+    \section1 Other Performance Related Improvements
+
+    In addition to the QtWebKit module, performance has been a focus
+    area in Qt 4.7 throughout the Qt framework. Here are a couple of
+    examples about performance related feature improvements.
+
+    On Mac OS X, Qt now uses a different widget implementation (called
+    "alien widgets"), which improves the responsiveness of
+    applications that have complex user interfaces with several
+    widgets.
+
+    Qt 4.7 introduces the QStaticText class, which can be used to
+    improve text rendering performance.  More info is available from
+    \l{http://labs.trolltech.com/blogs/2010/03/01/insanity-is-shaping-the-same-text-again-and-expecting-a-different-result/}{this blog}.
+
+    The QPainter class has a new API for rendering pixmap fragments
+    (QPainter::drawPixmapFragments), which can improve the rendering
+    performance of applications that need to render
+    \l{QPainter::drawPixmapFragments()}{pixmap fragments}.
+
+    Qt 4.7 has an updated version of the JavaScriptCore engine for the
+    QtScript module, which improves JavaScript execution performance.
+
+    \section1 New Classes, Functions, Macros, etc.
+
+    Links to new classes, elements, functions, macros, and other items
+    introduced in Qt 4.7.
+
+    \sincelist 4.7
+
+*/
+
+/*!
     \page qt4-6-intro.html
     \title What's New in Qt 4.6
@@ -469 +624 @@
     included in the \c changes-4.6.0 file
     \l{http://qt.nokia.com/developer/changes/changes-4.6.0}{available
-    online}. A \l{Known Issues in 4.6.3}{list of known issues}
+    online}. A \l{Known Issues in 4.7.2}{list of known issues}
     for this release is also available.
 
     Changes between this release and the previous release are provided
-    in the \c{changes-4.6.3} file (also
-    \l{http://qt.nokia.com/developer/changes/changes-4.6.3}{available online}).
+    in the \c{changes-4.7.2} file (also
+    \l{http://qt.nokia.com/developer/changes/changes-4.7.2}{available online}).
 \endomit
 
     A list of other Qt 4 features can be found on the \bold{\l{What's
     New in Qt 4}} page.
-
-    \bold{Highlights}
-
-    \tableofcontents
 
     \section1 Support for Symbian
@@ -552 +703 @@
     See \l{The State Machine Framework} documentation for more information.
 
-    \section1 Multi-Touch and Gestures
-
-    Support for multi-touch input enables users to interact with many
+    \section1 Touch and Gestures
+
+    Support for touch input enables users to interact with many
     parts of a user interface at the same time, and provides the basis
     for gestures. Additional infrastructure for gesture recognition
@@ -568 +719 @@
         \o Allows users to interact with applications in more natural ways.
         \o Simplifies finger-based interaction with UI components.
-        \o Combines support for common basic gestures and multi-touch gestures
+        \o Combines support for common basic gestures and touch gestures
            in a single general framework.
         \o Enables extensibility by design.
     \endlist
 
-    See the QTouchEvent class documentation for more information on multi-touch
+    See the QTouchEvent class documentation for more information on touch
     input and QGestureEvent for gestures.
 
-    \section1 DOM access API
+    \section1 DOM Access API
 
     Web pages and XML both have very complex document object models.
@@ -595 +746 @@
     \list
         \o Rewritten the QGraphicsView rendering algorithm.
-        \o Made QPixmapCache support efficient Key datastructure.
+        \o Made QPixmapCache support efficient Key data structure.
         \o Reduced overhead in QNetworkAccessManager.
         \o Added the QContiguousCache class, which provides efficient caching of
@@ -636 +787 @@
     information.
 
-    \section1 Qt3D enablers
+    \section1 Qt3D Enablers
 
     As more of Qt, and more of the applications built on Qt go 3D,
@@ -646 +797 @@
     The main features of the Qt3D enablers are currently: Math
     primitives for matrix multiplication, vectors, quaternions
-    (client-side), and API for vertex and fragment shaders, GLSL/ES.
+    (client-side), and an API for vertex and fragment shaders, GLSL/ES.
     Future research will, among other things include stencils,
     scissors, vertex buffers and arrays, texture manipulation, and
@@ -683 +834 @@
     in the \c changes-4.5.0 file
     \l{http://qt.nokia.com/developer/changes/changes-4.5.0}{available online}.
-    A \l{Known Issues in 4.6.3}{list of known issues} for this release is also
+    A \l{Known Issues in 4.7.2}{list of known issues} for this release is also
     available.
 
     Changes between this release and the previous release are provided
-    in the \c{changes-4.6.3} file (also
-    \l{http://qt.nokia.com/developer/changes/changes-4.6.3}{available online}).
+    in the \c{changes-4.7.2} file (also
+    \l{http://qt.nokia.com/developer/changes/changes-4.7.2}{available online}).
 
     A list of other Qt 4 features can be found on the
     \bold{\l{What's New in Qt 4}} page.
-
-    \bold{Highlights}
-
-    \tableofcontents
 
     \section1 Qt WebKit Integration