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= [[Image:Intro.png]] Introduction =

To develop with [[Qt-Maemo|Qt for Maemo]], a working SDK installation is required. There are [[Documentation/Maemo_5_Final_SDK_Installation|instructions on how to install the Maemo SDK]], and you can [http://www.youtube.com/watch?v=c8myh_iBy8k watch the Maemo SDK in action]. Alternatively, you may want to try [[MADDE]], a cross-platform Maemo development tool, available as a technology preview.

== Maemo platform ==

The Maemo platform is the software stack for Nokia Internet Tablets, which includes the Maemo operating system and the Maemo SDK. The Maemo Platform is mostly based on open source code, and has been developed by the Maemo Software department within Nokia in collaboration with many open source projects such as the Linux kernel, Debian, [[Hildon]] and GNOME.

Read more about [http://maemo.org/intro/platform/ the Maemo platform] and a [http://maemo.org/intro/developer_overview/ developer overview].

= [[Image:Rocket.png]] Getting started =

To start to develop with Maemo Qt, we need to [[Documentation/Maemo_5_Final_SDK_Installation|install the Maemo SDK]].

== Installing Qt packages in Scratchbox ==
Maemo Qt developers offers a set of Qt packages for [[Open development/Maemo roadmap/Fremantle|Fremantle]] (Maemo5 - OS2009) and Diablo (Maemo4.1 - OS2008).

== Fremantle ==
You do not need to add any extra repository for Fremantle since Qt packages are already available in the SDK. You can install Qt with the command:
 fakeroot apt-get install libqt4-gui libqt4-dev

=== Using Qt 4.6 in Fremantle ===
Since PR 1.2 release Qt 4.6 is available in public Fremantle repository
To upgrade older scratchbox targets to use the latest packages execute the following commands:
 fakeroot apt-get update
 fakeroot apt-get dist-upgrade

== Diablo ==
Diablo Qt packages are into the official [[Extras]] repository. In order to start to develop with those packages you need to [[Extras#Diablo|add extras repository to your repository list]], and then install Qt packages in the terminal:
 apt-get install libqt4-dev

==How to compile a Qt application in scratchbox==
Qt applications are usually built using QMake. Project like KDE instead replaced
QMake with CMake for more flexibility.
 
=== QMake ===
[http://doc.trolltech.com/4.5/qmake-manual.html QMake] is a tool from Trolltech that helps simplify the build process for development project across different platforms

You can build your Maemo Qt application in 3 simple steps:
# Generating project file (Required if there is no .pro file into the app source tree) <pre>qmake -project</pre>
# Generating Makefile from the QMake project file: <pre>qmake file.pro</pre>
# <pre>make</pre>

=== CMake ===

Because of some issue with [http://www.cmake.org/ CMake], [[Open development/Maemo roadmap/Diablo|Diablo]] CMake packages are currently useless since CMake segfaults (on the device at least). This issue has been solved in [[Open development/Maemo roadmap/Fremantle|Fremantle]] and CMake packages that comes from Fremantle [[SDK]] work nicely.

CMake projects usually have a <code>CMakeLists.txt</code> file instead of: 
# .pro file used by QMake projects
# Makefile.am used by Autotools projects (standard in Unix/Linux)

Using CMake to build the project is extremely easy. In the directory containing CMakeLists.txt, supply the following two commands, where path is the path to the source code.
 cmake path
 make

Note: CMake is not installed by default in [[:Category:Scratchbox|scratchbox]]. You can install it with the command:
 fakeroot apt-get install cmake

== Running a Qt application in: ==
=== Scratchbox ===
Diablo and Fremantle Qt applications can run into the device as into scratchbox.

First step to run a Qt application is starting the SDK UI:
 
# Run Xephyr. It is able to run a [http://en.wikipedia.org/wiki/X_Window_System X Server] inside another X Server. <pre>Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -kb</pre>
# Set display for application that runs inside scratchbox: <pre>export DISPLAY=:2</pre>
# You can now run the SDK UI. A Diablo or Fremantle desktop will appear in your Xephyr window: <pre>af-sb-init.sh start</pre>
# Now you are ready to run any Maemo or Maemo Qt application with:<pre>run-standalone.sh ./qtapps</pre>

Note: run-standalone.sh sets some variable needed by Qt to use the Hildon style.

=== Device ===
Maemo Qt applications are Linux binaries. They can run on the device without any problem if you copy them to "partitions" mounted with exec flag. (for example, /home/user or /opt in Fremantle).

Fore example, if we want to run quassel (Qt IRC Client) we have to launch it with:
 su -c ./quassel user

= [[Image:Hammer.png]] Porting Qt applications to Maemo =

Porting a Qt desktop application to Maemo requires very little effort. This is because the Maemo Qt libraries will take care of giving the Hildon look & Feel and enabling the virtual input methods for your application.

==Overriding the Qt Maemo changes==

===Maemo Style===
Hildon Style is the default Qt application style. Other style available are:
* [http://doc.trolltech.com/4.4/gallery-cleanlooks.html QCleanLooks]
* [http://doc.trolltech.com/4.4/gallery-windows.html Windows]
* [http://doc.trolltech.com/4.4/gallery-plastique.html Plastique]

Qt application can use other Qt styles;
* Running your application with the style flag:
 ./qt-test-application -style windows

* Using [http://doc.trolltech.com/4.4/qapplication.html#setStyle QApplication::setStyle( QStyle * style )]

* If you want to change the style of a widget:[http://doc.trolltech.com/4.4/qwidget.html#setStyle QWidget::setStyle( QStyle * style )]

===Showing the status bar===

Hildon applications don't have a status bar. Qt for Maemo hides the status bar by default.

You can show it again by using method ''statusBar()->show()'' in your class derived from QMainWindow.

===Using the Kinetic Finger Scrolling (cf Gtk's PannableArea)===
See [[Qt/Finger Scrolling|Finger Scrolling]]

==Adding Maemo changes to a Qt Application==

Some methods of Qt for Maemo are not available in the "standard" Qt libs, so a Qt application with specific Maemo Qt code can't be built outside the Maemo SDK. To avoid this issue, the developer can use the preprocessor directives, for example:

* Qt 4.5 (Diablo and Fremantle)
 #ifdef Q_WS_HILDON
 //Specific hildon/Maemo5 code here 
 #endif

Qt project files can load hildon files using: (check [http://doc.trolltech.com/4.5/qmake-function-reference.html qmake ref guide] for more info about qmake options)
 contains(QT_CONFIG, hildon): {
    message("Hello Hildon")
    SOURCE += hildon.cpp
    HEADER += hildon.h
    FORMS   += hildon.ui
}

* Qt 4.6 (Fremantle)
Q_WS_HILDON has been replaced by Q_WS_MAEMO_5 in Qt 4.6 and Qt 4.5 "contains(QT_CONFIG, hildon):{}" does same job of Qt 4.6 "maemo5 {}".

#ifdef Q_WS_MAEMO_5
    //specific hildon/maemo5 code here
 #endif

maemo5 {
    message("Hello Hildon")
    SOURCE += hildon.cpp
    HEADER += hildon.h
    FORMS   += hildon.ui
 }

== Home widget interaction ==
{{main|Qt4 and Hildon home widget interaction}}

==Limitations==

Currently Qt Maemo lacks full support for Hildon widgets introduced in Maemo 5.

'''At the moment, creating a Qt application that follows Maemo 5 UI Style requires using custom Qt widgets, coded within the application itself'''.

There is work ongoing to provide Qt Hildon widgets for Maemo 5, see [http://wiki.maemo.org/Qt4_Hildon/Qt_Hildon_Widgets Qt Hildon Widgets]

To get the benefits of the ongoing Maemo 5 hildon integration work in Qt, you must get the latest Qt source code and compile it yourself. See [http://wiki.maemo.org/Qt4_Hildon#Building_Qt_from_GIT_rep Building Qt from GIT repository].

= [[Image:Bug.png]] Debugging a Qt application =

{{main|Documentation/Maemo_5_Developer_Guide/Kernel_and_Debugging_Guide/Maemo_Debugging_Guide}}

'''Note''': Fremantle Gdb 6.8 crashes in x86 and gives messed up backtraces on the device. Using gdb 7.0 is recommended. You can get gdb 7.0 sources from http://ftp.de.debian.org/debian/pool/main/g/gdb/gdb_7.0.orig.tar.gz, compile it (./configure && make) inside X86 and armel scratchbox targets.
[http://chaos.troll.no/~harald/gdb7/ Here you can find GDB7 for fremantle x86 and armel]. 
 /usr/local/bin/gdb7 ./myapp

= [[Image:chart.png]] Profiling a Qt application =

== OProfile ==

== Valgrind ==

= [[Image:package.png]] Packaging a Qt application for Maemo =

= [[Image:Helmet.png]] Maemo Qt API Reference =

Maemo Qt is based on Qt for X11. It shares same APIs avoiding API breaks. In this way every Qt application that runs in other platforms (Windows, Mac OS X, Linux, S60, etc.) can run in Maemo devices as well. 
To Develop a Qt application you can use the [http://doc.trolltech.com/4.5/index.html Official Qt 4.5 API documentation] and the list below to see what are the Maemo changes.

==Diablo==
  '''QString QDesktopServices::storageLocation(StandardLocation type)''' returns specific Maemo locations for these types:
  - DesktopLocation:   QDir::homePath() + QLatin1String("/MyDocs"),            instead of QDir::homePath() + QLatin1String("/Desktop")
  - DocumentsLocation: QDir::homePath() + QLatin1String("/MyDocs/.documents"), instead of QDir::homePath() + QLatin1String("/MyDocs/.documents")
  - PicturesLocation:  QDir::homePath() + QLatin1String("/MyDocs/.images"),    instead of QDir::homePath() + QLatin1String("/Pictures")
  - MusicLocation:     QDir::homePath() + QLatin1String("/MyDocs/.sounds"),    instead of QDir::homePath() + QLatin1String("/Music")
  - MoviesLocation:    QDir::homePath() + QLatin1String("/MyDocs/.videos"),    instead of QDir::homePath() + QLatin1String("/MyDocs/.videos")

'''QTabletEvents''' are able to get the pressure value from the touchscreen.
   - The eventdeviceType is for the touchscreen is set to QTabletEvent::Stylus.
   - QTabletEvents won't be used anymore in Fremantle
  
  '''Finger poke''' is emulated in scratchbox by the Middle Mouse button (NOTE: There is no Fullscreen VKB in scratchbox)
 
  '''QInputEvents''' don't move the cursor. 
  It's mandatory to get working the HIM moving the cursor via QInputMethodEvents.
  Why is it mandatory?  
  Because if the user select text with the finger from the right to the left, we are able to remove the highlighted text, but the
  cursor will be moved on the last char instead to stay on the first one.
   
  To do that some changes has been added to some widget function like: ''widget::inputMethodEvent(QInputMethodEvent *e)''.
  Modifing that function in some custom widgets may be necessary.
  Don't reimplementing that function will break some fullscreen virtual keyboard features.
  
  '''Hardcoded Keys:'''
  In the QMainWindow:
  - F6 - Toggle fullscreen the application
  - F4 - Shows/Hides the application context menu
  - Zoom in  - is a standard [http://doc.trolltech.com/4.4/qkeysequence.html#StandardKey-enum key sequence] QKeySequence::ZoomIn
  - Zoom out - is a standard [http://doc.trolltech.com/4.4/qkeysequence.html#StandardKey-enum key sequence] QKeySequence::ZoomOut

'''Input Method:'''
 Maemo Qt uses the Hildon IM as default Input method.
 Each kind of widget can set the IM mode. This allows the input method to focus on the type of input that the application is expecting.
 Eg: spinboxes can receive only numeric characters (1-9).
 
 NOTE: Qt widgets like QTextEdit, QLineEdit... set the right input method mode automatically. 
 
 A developer can change it by using:
 void QInputContext::setInputMode(int mode);
 It will update immediately the Hildon Input method to use the selected IM mode. 
 
 HIC Modes:
 HILDON_GTK_INPUT_MODE_ALPHA 	alphabetical characters and whitespace
 HILDON_GTK_INPUT_MODE_NUMERIC 	numbers 0-9 and the '-' character
 HILDON_GTK_INPUT_MODE_SPECIAL 	special characters
 HILDON_GTK_INPUT_MODE_HEXA 	hexadecimal characters; numbers 0-9, characters a-f, and A-F
 HILDON_GTK_INPUT_MODE_TELE 	telephone numbers; numbers 0-9, whitespace, and the characters "pwPW/().-+*#?,"
 HILDON_GTK_INPUT_MODE_FULL 	unrestricted entry mode, combination of the alpha, numeric and special modes.
 HILDON_GTK_INPUT_MODE_MULTILINE 	the client contains multiple lines of text or accepts linebreaks in the input.
 HILDON_GTK_INPUT_MODE_INVISIBLE 	do not echo or save the input in the IM when entering sensitive information such as passwords.
 HILDON_GTK_INPUT_MODE_AUTOCAP 	automatically capitalize the first letter at the start of a sentence.
 HILDON_GTK_INPUT_MODE_DICTIONARY 	enable predictive dictionaries and learning based on the input.
 
 Example:
 For a password field we need to set a specific IM mode:
 int mode = HILDON_GTK_INPUT_MODE_FULL | HILDON_GTK_INPUT_MODE_INVISIBLE
 QInputContext *qic = widget->inputContext();
 qic->setInputMode(mode);
 
 If you are developing a Custom widget able to receive input text, you can instruct your widget to use the right IM Mode just returning
 the mode.
 
 - How does it work?
 The Hildon IM sends a XMessage to pop up the "Virtual Keyboard" (or better the Main HIM UI) when an input widget receive the focus.
 The IM before to raise the VKB, makes an inputMethodQuery to the widget retrieving the IM mode.
 If the developer of the custom widget doesn't set the mode property, the IM will use HILDON_GTK_INPUT_MODE_FULL (the default mode) for that widget.
 
 Setting the ImMode is quite easy. Check the code below for more understanding.
 
 #ifdef Q_WS_HILDON
 #include <QInputContext>
 #endif
 
 QVariant QAbstractSpinBox::inputMethodQuery(Qt::InputMethodQuery query) const
 { 
 Q_D(const QAbstractSpinBox);
 switch(query) {
 case Qt::ImMode:{
 int mode = HILDON_GTK_INPUT_MODE_NUMERIC;
 return QVariant(mode);
 }
 default:
 return d->edit->inputMethodQuery(query);
 }
 }

=FREMANTLE (Qt 4.5)=

==Kinetic scrolling==
Kinetic scrolling is enabled by default in QListWidgets and is supported by any Qt widget that inherits QScrollArea.
Any item view widgets (QTreeView/QTreeWidget, QListView, QTableView/QTableWidget...) can use fingerscroll if it has "FingerScrollable" dynamic property set to true.
Eg:
  QTableWidget *table = new QTableWidget(this);
  table->setProperty("FingerScrollable", true);

NOTE: Available in Qt > 4.5.3-xxxxx-maemo4

==Hildon-Desktop widgets==

They are supported by Qt. An example (qt-example-hildondesktopwidget) is available in extras-devel.

==Hildon menus==
Maemo5 menus are created using QActions available in menu bar. 
Hidden, disabled, separators and widget actions won't shown. (Same in Qt 4.6)

* qt-4.5.3-xxxx-maemo4 packages - needs QActions in a "fremantle" menu.
* Pkgs > qt-4.5.3-xxxx-maemo4 shows Maemo5 menus automatically

Note: Maemo5 policy doesn't allow application to have more than 10 items.

==Stackable windows==
http://maemomm.garage.maemo.org/docs/tutorial/figures/stackable-window.png
Are supported by Qt. To create them you need to create a MainWindow child of another Main window.

QMainWindow *fistStackableWindow = new QMainWindow;
 QMainWindow *secondStackableWindow = new QMainWindow(fistStackableWindow);
// you need the below line to see the back button on the top right hand corner of the stacked window instead of a cross
 secondStackableWindow->setAttribute(Qt::WA_Maemo5StackedWindow);

''Note: this is not entirely accurate, see''

http://qt.nokia.com/doc/qt-maemo-4.6/maemo5-stackedwindows.html

==Raise a Qt application in background==
QWidget::activateWindow() does the job.

Implemented in Qt packages >= qt-4.5.3-xxxx-maemo6
== How to minimize a Qt application? ==
 QDBusConnection c = QDBusConnection::sessionBus();
 QDBusMessage m = QDBusMessage::createSignal("/","com.nokia.hildon_desktop","exit_app_view");
 c.send(m);

==Portrait mode and listening for orientation changes==
If you want to run your application in portrait mode then you can add these lines to your application. The code goes in your main widget constructor.

#ifdef Q_WS_HILDON
 //Includes for portrait mode support
 # include <X11/Xlib.h>
 # include <X11/Xatom.h>
 # include <QtGui/QX11Info>
 #endif
 
 #ifndef Q_WS_HILDON
 int value = 1;
 Atom portraitSupport = XInternAtom(QX11Info::display(), "_HILDON_PORTRAIT_MODE_SUPPORT", false);
 Atom portraitRequest = XInternAtom(QX11Info::display(), "_HILDON_PORTRAIT_MODE_REQUEST", false);
 XChangeProperty(QX11Info::display(), winId(), portraitSupport, XA_CARDINAL, 32, PropModeReplace, (uchar *)&value, 1);
 XChangeProperty(QX11Info::display(), winId(), portraitRequest, XA_CARDINAL, 32, PropModeReplace, (uchar *)&value, 1);
 #endif

If you want to listen for orientation changes and then switch the view to landscape or potrait mode automatically than take a look at [[Maemo_Qt_Extra_Libraries]] for more information.

== QDockWidgets ==
QDockWidgets are not finger friendly widgets. They should not be used in Maemo.
In case you are porting an application to Maemo maybe you want to do
few changes as possible into your UI. Then you could use QDockWidget::setFeatures(QDockWidget::NoDockWidgetFeatures); to hide float and close button and lock the position of the dock widget.

== QPrint* and QSystemTray support missing ==
 Printing (QPrint*) and System tray support is missing in current
 Qt 4.5.3-xxxx-maemo4 packages.
 Since incompatibility with KDE and other Qt application, they will be enabled again in next Qt 4.5.3 packages.

== QSplashScreen not fully compatible with Hildon-Desktop ==
 QSplashScreen's window type is not supported in Fremantle. The splash screen is
 shown in full screen and the image is repeated to fill the splash screen's
 window. When splash screen is closed normal window closing animation is shown
 before showing the actual application window. For these reasons developers are
 disencouraged to use splash screens in their applications.

As a workaround for the problem you can set a window property that tells HD to skip the transitions:

static void set_no_transitions (Display *dpy, Window w)
 {
 Atom no_trans;
 int one = 1;
 no_trans = XInternAtom (dpy, "_HILDON_WM_ACTION_NO_TRANSITIONS", False);
 XChangeProperty (dpy, w, no_trans,
                  XA_CARDINAL, 32, PropModeReplace,
                  (unsigned char *)&one, 1);
 }

== QToolBar limitations ==
Adding a QToolBar to a QMainWindow will always result in a toolbar at the
bottom of the screen. (Justification/Workarounds?)

=FREMANTLE (Qt 4.6)=
Here an example that shows several maemo5 Qt widgets in Qt 4.6.

http://qt.nokia.com/doc/qt-maemo-4.6/examples-maemo5.html

http://qt.gitorious.org/+qt-developers/qt/x11-maemo/trees/986340bb5e4b69ceb0a959c2a067a1ed5e504d50/examples/maemo5/widgets

==Finger Scrolling==

Kinetic scrolling is present by default in most scrolling widgets, eg. <code>QTextBrowser</code>, <code>QTableView</code>. If you want to tweak the kinetic scrolling parameters like inertia and acceleration then you can instaniate a <code>QAbstractKineticScroller</code> object like this:

QAbstractKineticScroller ks = 
 scrollArea->property("kineticScroller").value<QAbstractKineticScroller *>();

where scrollArea could be <code>QScrollArea</code> with some widgets added to it, or you could use implementations like <code>QTextBrowser</code>.

You can tweak scrolling like this:
 ks->setDragInertia( (double)value / 100.0)
 ks->setMode(QAbstractKineticScroller::PushMode)
 
etc., refer to the examples here for details: http://qt.gitorious.org/+qt-developers/qt/x11-maemo/blobs/4.6-fremantle/examples/maemo5/kineticscroller/main.cpp

==QSplashScreen==
Should be fixed in Qt 4.6. SplashWindow type is not supported by Fremantle WM. Qt 4.6 display splash screen using popup window type.

==Orientation==
[http://qt.nokia.com/doc/qt-maemo-4.6/maemo5-rotation.html Official documentation]

==Maemo5 Readme file==
There is a [http://qt.gitorious.org/+qt-developers/qt/x11-maemo/blobs/4.6-fremantle/README.maemo5 README file in Qt 4.6 source tree].

= [[Image:Helmet.png]] Contributing to the Maemo Qt Project =

Maemo Qt is a community project. Contributing to the forum, sending us patches, give us feedbacks, tracking bugs are all activities that help us to improve the quality of our work.

Here there is a list of things that every person interested in helping us should read.

==Stay updated==
Any Maemo Qt developer should be updated and should participate to the discussions, for that he must join the Mailing list.
BTW the mailing list is not for Maemo Qt Developers but it's open to Maemo Qt application developers too.

== Introduction to Git ==
If you are a git newbie you maybe find interesting these links:
* http://www.sourcemage.org/Git_Guide
* http://www.gitcasts.com/
* http://www.gnome.org/~newren/eg/git-for-svn-users.html
* Using the git protocol through a HTTP CONNECT proxy: http://www.emilsit.net/blog/archives/how-to-use-the-git-protocol-through-a-http-connect-proxy/

==Understanding the structure of our Git repository==

== Preparation ==

Make sure each scratchbox target has

fakeroot apt-get build-dep libqt4-gui

(you may need to apt-get install libgl-dev too as it's not in the Build-Depends: yet)

==Building Qt from Git repository==

# Clone the repository: <pre>git clone git://gitorious.org/+qt-maemo-developers/qt/qt-maemo.git</pre> or if you are a member of our team: <pre>git clone git@gitorious.org:+qt-maemo-developers/qt/qt-maemo.git</pre>
# Change dir: <pre>cd qt-maemo</pre>
# Copy the remote 4.5 branch in your working copy: <pre>git checkout -b 4.5 origin/4.5</pre>
# Checkout ONE of these branches: <pre>git checkout -b qt-diablo origin/qt-diablo</pre> <pre>git checkout -b qt-n900+w34 origin/qt-n900+w34</pre> <pre>git checkout -b qt-mer origin/qt-mer</pre>
# Build the packages: <pre>dpkg-buildpackage -rfakeroot -b</pre>

==Merging branches changes in the mainline [OLD]==

Before to merge your changes in the mainline, the code must be full working, cleaned and tested. A review from another developer is also needed in order to reduce the possibility to add errors.

==QML==
[[QML]] is a GUI interface building scripting language for Qt. Check out the [[QML-EnhancedCalcExample | QML calculator example]].

=[[Image:Help-contents.png]] F.A.Q.=

; ''I'm trying to compile a Qt application for ARMEL, but I got the error below. What's wrong?''
: <pre>/targets/FREMANTLE_X86/usr/include/qt4/QtCore/qatomic_i386.h:127: error: impossible constraint in 'asm'</pre>
:You are using x86 include files, then you have to update your Makefile. Running <code>qmake</code> before <code>make</code> will be solve this issue.

; I'm trying to compile a Qt packcage for x86, but I got the error below. What's wrong?
: <pre>In file included from maemo/gconfsymbols.cpp:41:
 maemo/gconfsymbols_p.h:49:25: gconf/gconf.h: No such file or directory</pre>
: Your scratchbox does not have <code>/bin/sh</code>, so when calling <code>pkg-config</code> from <code>qmake</code>, <code>CFLAGS</code> and <code>LIBS</code> are not set correctly. Running <code>ln -s /scratchbox/tools/bin/sh /bin/sh</code> will be solve this issue.

; I'm trying to compile a diablo Qt package, so I just created a symbolic link, debian, for debian.diablo, and then run dpkg-buildpackage command, but I got a build error because the symbolic link was deleted
: When running dpkg-buildpackage, all symbolic links will be deleted, so need to rename the folder from debian.diablo to debian to make a build of diablo Qt package.

; I installed Qt (libqt4-dev) to scratchbox and tried to build a sample application, but I got the error because some header files such as qhildonstyle.h, and qvfbhdr.h etc. were missing
: libqt4-dev should copy all header files, but now, at least in 4.5.2-1maemo1, some files are missing. Please download file below and extract to your scratchbox system.
: <pre>http://qt4.garage.maemo.org/patches/qt4-missing-header.tgz</pre>

[[Category:Development]]
[[Category:Qt]]

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@@ Line 1: / Line 1: @@
-== Introduction ==
+= [[Image:Intro.png]] Introduction =
 To develop with [[Qt-Maemo|Qt for Maemo]], a working SDK installation is required. There are [[Documentation/Maemo_5_Final_SDK_Installation|instructions on how to install the Maemo SDK]], and you can [http://www.youtube.com/watch?v=c8myh_iBy8k watch the Maemo SDK in action]. Alternatively, you may want to try [[MADDE]], a cross-platform Maemo development tool, available as a technology preview.
@@ Line 9: / Line 9: @@
 Read more about [http://maemo.org/intro/platform/ the Maemo platform] and a [http://maemo.org/intro/developer_overview/ developer overview].
-== Getting started ==
+= [[Image:Rocket.png]] Getting started =
 To start to develop with Maemo Qt, we need to [[Documentation/Maemo_5_Final_SDK_Installation|install the Maemo SDK]].
-=== Installing Qt packages in Scratchbox ===
+== Installing Qt packages in Scratchbox ==
-Maemo Qt developers offers a set of Qt packages for [[Open development/Maemo roadmap/Fremantle|Fremantle]] (Maemo5 - OS2009) and [[Open development/Maemo roadmap/Diablo|Diablo]] (Maemo4.1 - OS2008).
+Maemo Qt developers offers a set of Qt packages for [[Open development/Maemo roadmap/Fremantle|Fremantle]] (Maemo5 - OS2009) and Diablo (Maemo4.1 - OS2008).
-=== Fremantle ===
+== Fremantle ==
 You do not need to add any extra repository for Fremantle since Qt packages are already available in the SDK. You can install Qt with the command:
-  fakeroot apt-get install libqt4-dev
+  fakeroot apt-get install libqt4-gui libqt4-dev
-==== Using Qt 4.6 in Fremantle ====
+=== Using Qt 4.6 in Fremantle ===
+Since PR 1.2 release Qt 4.6 is available in public Fremantle repository
-Since the [[Maemo 5/PR1.2|PR1.2]] release Qt 4.6 is available in public Fremantle repository. To upgrade older Scratchbox targets to use the latest packages execute the following commands:
+To upgrade older scratchbox targets to use the latest packages execute the following commands:
   fakeroot apt-get update
   fakeroot apt-get dist-upgrade
-=== Diablo ===
+== Diablo ==
 Diablo Qt packages are into the official [[Extras]] repository. In order to start to develop with those packages you need to [[Extras#Diablo|add extras repository to your repository list]], and then install Qt packages in the terminal:
   apt-get install libqt4-dev
 ==How to compile a Qt application in scratchbox==
-Qt applications are usually built using QMake. Project like KDE instead replaced QMake with CMake for more flexibility.
+Qt applications are usually built using QMake. Project like KDE instead replaced
+QMake with CMake for more flexibility.
 === QMake ===
@@ Line 37: / Line 38: @@
 You can build your Maemo Qt application in 3 simple steps:
-# Generating project file (Required if there is no .pro file into the app source tree)<pre>qmake -project</pre>
+# Generating project file (Required if there is no .pro file into the app source tree)<br/><pre>qmake -project</pre>
-# Generating Makefile from the QMake project file:<pre>qmake file.pro</pre>
+# Generating Makefile from the QMake project file:<br/><pre>qmake file.pro</pre>
 # <pre>make</pre>
 === CMake ===
-Because of some issue with [http://www.cmake.org/ CMake], [[Open development/Maemo roadmap/Diablo|Diablo]] CMake packages are currently useless since CMake segfaults (on the device at least). This issue has been solved in [[Open development/Maemo roadmap/Fremantle|Fremantle]] and CMake packages that comes from Fremantle SDK work nicely.
+Because of some issue with [http://www.cmake.org/ CMake], [[Open development/Maemo roadmap/Diablo|Diablo]] CMake packages are currently useless since CMake segfaults (on the device at least). This issue has been solved in [[Open development/Maemo roadmap/Fremantle|Fremantle]] and CMake packages that comes from Fremantle [[SDK]] work nicely.
 CMake projects usually have a <code>CMakeLists.txt</code> file instead of:
 # .pro file used by QMake projects
-# <code>Makefile.am</code> used by Autotools projects (standard in Unix/Linux)
+# Makefile.am used by Autotools projects (standard in Unix/Linux)
 Using CMake to build the project is extremely easy. In the directory containing CMakeLists.txt, supply the following two commands, where path is the path to the source code.
@@ Line 58: / Line 59: @@
 == Running a Qt application in: ==
 === Scratchbox ===
-Diablo and Fremantle Qt applications can run on the device as in Scratchbox.
+Diablo and Fremantle Qt applications can run into the device as into scratchbox.
 First step to run a Qt application is starting the SDK UI:
-# Run Xephyr. It is able to run a [[:wikipedia:X_Window_System| X Server]] inside another X Server.<pre>Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -kb</pre>
+# Run Xephyr. It is able to run a [http://en.wikipedia.org/wiki/X_Window_System  X Server] inside another X Server.<br/><pre>Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -kb</pre>
-# Set display for application that runs inside scratchbox:<pre>export DISPLAY=:2</pre>
+# Set display for application that runs inside scratchbox:<br/><pre>export DISPLAY=:2</pre>
-# You can now run the SDK UI. A Diablo or Fremantle desktop will appear in your Xephyr window:<pre>af-sb-init.sh start</pre>
+# You can now run the SDK UI. A Diablo or Fremantle desktop will appear in your Xephyr window:<br/><pre>af-sb-init.sh start</pre>
 # Now you are ready to run any Maemo or Maemo Qt application with:<pre>run-standalone.sh ./qtapps</pre>
-Note: <code>run-standalone.sh</code> sets some variable needed by Qt to use the Hildon style.
+Note: run-standalone.sh sets some variable needed by Qt to use the Hildon style.
 === Device ===
-Maemo Qt applications are Linux binaries. They can run on the device without any problem if you copy them to "partitions" mounted with exec flag. (for example, <code>/home/user</code> or <code>/opt</code> in Fremantle).
+Maemo Qt applications are Linux binaries. They can run on the device without any problem if you copy them to "partitions" mounted with exec flag. (for example, /home/user or /opt in Fremantle).
 Fore example, if we want to run quassel (Qt IRC Client) we have to launch it with:
   su -c ./quassel user
-== Porting Qt applications to Maemo ==
+= [[Image:Hammer.png]] Porting Qt applications to Maemo =
 Porting a Qt desktop application to Maemo requires very little effort. This is because the Maemo Qt libraries will take care of giving the Hildon look & Feel and enabling the virtual input methods for your application.
-===Overriding the Qt Maemo changes===
+==Overriding the Qt Maemo changes==
-====Maemo Style====
+===Maemo Style===
 Hildon Style is the default Qt application style. Other style available are:
-* [http://doc.trolltech.com/4.5/gallery-cleanlooks.html QCleanLooks]
+* [http://doc.trolltech.com/4.4/gallery-cleanlooks.html QCleanLooks]
-* [http://doc.trolltech.com/4.5/gallery-windows.html Windows]
+* [http://doc.trolltech.com/4.4/gallery-windows.html Windows]
-* [http://doc.trolltech.com/4.5/gallery-plastique.html Plastique]
+* [http://doc.trolltech.com/4.4/gallery-plastique.html Plastique]
 Qt application can use other Qt styles;
@@ Line 92: / Line 92: @@
   ./qt-test-application -style windows
-* Using [http://doc.trolltech.com/4.5/qapplication.html#setStyle QApplication::setStyle( QStyle * style )]
+* Using [http://doc.trolltech.com/4.4/qapplication.html#setStyle QApplication::setStyle( QStyle * style )]
-* If you want to change the style of a widget:[http://doc.trolltech.com/4.5/qwidget.html#setStyle QWidget::setStyle( QStyle * style )]
+* If you want to change the style of a widget:[http://doc.trolltech.com/4.4/qwidget.html#setStyle QWidget::setStyle( QStyle * style )]
-====Showing the status bar====
+===Showing the status bar===
 Hildon applications don't have a status bar. Qt for Maemo hides the status bar by default.
@@ Line 102: / Line 102: @@
 You can show it again by using method ''statusBar()->show()'' in your class derived from QMainWindow.
-====Using the Kinetic Finger Scrolling (cf Gtk's PannableArea)====
+===Using the Kinetic Finger Scrolling (cf Gtk's PannableArea)===
 See [[Qt/Finger Scrolling|Finger Scrolling]]
-===Adding Maemo changes to a Qt Application===
+==Adding Maemo changes to a Qt Application==
-Some methods of Qt for Maemo are not available in the "standard" Qt libs, so a Qt application with specific Maemo Qt code can't be built outside the Maemo SDK. To avoid this issue, the developer can use the preprocessor directives, for example with Qt 4.5 on Diablo and Fremantle:
+Some methods of Qt for Maemo are not available in the "standard" Qt libs, so a Qt application with specific Maemo Qt code can't be built outside the Maemo SDK. To avoid this issue, the developer can use the preprocessor directives, for example:
-<source lang="cpp-qt">
+* <b>Qt 4.5 (Diablo and Fremantle)</b>
-#ifdef Q_WS_HILDON
+ #ifdef Q_WS_HILDON
-   //Specific hildon/Maemo5 code here
+    //Specific hildon/Maemo5 code here
-#endif
+ #endif
-</source>
 Qt project files can load hildon files using: (check [http://doc.trolltech.com/4.5/qmake-function-reference.html qmake ref guide] for more info about qmake options)
@@ Line 124: / Line 122: @@
 }
-=== Home widget interaction ===
+* <b>Qt 4.6 (Fremantle)</b>
+Q_WS_HILDON has been replaced by Q_WS_MAEMO_5 in Qt 4.6 and Qt 4.5 "contains(QT_CONFIG, hildon):{}" does same job of Qt 4.6 "maemo5 {}".
+ #ifdef Q_WS_MAEMO_5
+    //specific hildon/maemo5 code here
+ #endif
+ maemo5 {
+    message("Hello Hildon")
+    SOURCE += hildon.cpp
+    HEADER += hildon.h
+    FORMS   += hildon.ui
+ }
+== Home widget interaction ==
 {{main|Qt4 and Hildon home widget interaction}}
-===Limitations===
+==Limitations==
 Currently Qt Maemo lacks full support for Hildon widgets introduced in Maemo 5.
@@ Line 134: / Line 146: @@
 '''At the moment, creating a Qt application that follows Maemo 5 UI Style requires using custom Qt widgets, coded within the application itself'''.
-There is work ongoing to provide Qt Hildon widgets for Maemo 5, see [[Qt4_Hildon/Qt_Hildon_Widgets|Qt Hildon Widgets]]
+There is work ongoing to provide Qt Hildon widgets for Maemo 5, see [http://wiki.maemo.org/Qt4_Hildon/Qt_Hildon_Widgets Qt Hildon Widgets]
-To get the benefits of the ongoing Maemo 5 hildon integration work in Qt, you must get the latest Qt source code and compile it yourself. See [[Qt4_Hildon#Building_Qt_from_GIT_rep|Building Qt from GIT repository]].
+To get the benefits of the ongoing Maemo 5 hildon integration work in Qt, you must get the latest Qt source code and compile it yourself. See [http://wiki.maemo.org/Qt4_Hildon#Building_Qt_from_GIT_rep Building Qt from GIT repository].
-== Debugging a Qt application ==
+= [[Image:Bug.png]] Debugging a Qt application =
 {{main|Documentation/Maemo_5_Developer_Guide/Kernel_and_Debugging_Guide/Maemo_Debugging_Guide}}
@@ Line 146: / Line 158: @@
   /usr/local/bin/gdb7 ./myapp
-== Profiling a Qt application ==
+= [[Image:chart.png]] Profiling a Qt application =
-=== OProfile ===
+== OProfile ==
 {{main|Documentation/devtools/maemo5/oprofile}}
-=== Valgrind ===
+== Valgrind ==
 {{main|Documentation/devtools/maemo5/valgrind}}
-== Packaging a Qt application for Maemo ==
-{{main|Packaging a Qt application}}
-== Maemo Qt API Reference ==
+= [[Image:package.png]] Packaging a Qt application for Maemo =
-Maemo Qt is based on Qt for X11. It shares same APIs avoiding API breaks. In this way every Qt application that runs in other platforms (Windows, Mac OS X, Linux, S60, etc.) can run in Maemo devices as well. To Develop a Qt application you can use the [http://doc.trolltech.com/4.5/index.html Official Qt 4.5 API documentation] and the list below to see what are the Maemo changes.
+{{main|Packaging a Qt application}}
-===Diablo===
+= [[Image:Helmet.png]] Maemo Qt API Reference =
-'''QString QDesktopServices::storageLocation(StandardLocation type)''' returns specific Maemo locations for these types:
+Maemo Qt is based on Qt for X11. It shares same APIs avoiding API breaks. In this way every Qt application that runs in other platforms (Windows, Mac OS X, Linux, S60, etc.) can run in Maemo devices as well.
-* DesktopLocation:   QDir::homePath() + QLatin1String("/MyDocs"),            instead of QDir::homePath() + QLatin1String("/Desktop")
+To Develop a Qt application you can use the [http://doc.trolltech.com/4.5/index.html Official Qt 4.5 API documentation] and the list below to see what are the Maemo changes.
-* DocumentsLocation: QDir::homePath() + QLatin1String("/MyDocs/.documents"), instead of QDir::homePath() + QLatin1String("/MyDocs/.documents")
-* PicturesLocation:  QDir::homePath() + QLatin1String("/MyDocs/.images"),    instead of QDir::homePath() + QLatin1String("/Pictures")
-* MusicLocation:     QDir::homePath() + QLatin1String("/MyDocs/.sounds"),    instead of QDir::homePath() + QLatin1String("/Music")
-* MoviesLocation:    QDir::homePath() + QLatin1String("/MyDocs/.videos"),    instead of QDir::homePath() + QLatin1String("/MyDocs/.videos")
-'''QTabletEvents''' are able to get the pressure value from the touchscreen. The eventdeviceType is for the touchscreen is set to QTabletEvent::Stylus. QTabletEvents won't be used anymore in Fremantle
+==Diablo==
+  '''QString QDesktopServices::storageLocation(StandardLocation type)''' returns specific Maemo locations for these types:
+  - DesktopLocation:   QDir::homePath() + QLatin1String("/MyDocs"),            instead of QDir::homePath() + QLatin1String("/Desktop")
+  - DocumentsLocation: QDir::homePath() + QLatin1String("/MyDocs/.documents"), instead of QDir::homePath() + QLatin1String("/MyDocs/.documents")
+  - PicturesLocation:  QDir::homePath() + QLatin1String("/MyDocs/.images"),    instead of QDir::homePath() + QLatin1String("/Pictures")
+  - MusicLocation:     QDir::homePath() + QLatin1String("/MyDocs/.sounds"),    instead of QDir::homePath() + QLatin1String("/Music")
+  - MoviesLocation:    QDir::homePath() + QLatin1String("/MyDocs/.videos"),    instead of QDir::homePath() + QLatin1String("/MyDocs/.videos")
-'''Finger poke''' is emulated in scratchbox by the Middle Mouse button (NOTE: There is no Fullscreen VKB in scratchbox)
+  '''QTabletEvents''' are able to get the pressure value from the touchscreen.
+   - The eventdeviceType is for the touchscreen is set to QTabletEvent::Stylus.
-'''QInputEvents''' don't move the cursor.
+   - QTabletEvents won't be used anymore in Fremantle
-It's mandatory to get working the HIM moving the cursor via QInputMethodEvents.
-Why is it mandatory?  Because if the user select text with the finger from the right to the left, we are able to remove the highlighted text, but the cursor will be moved on the last char instead to stay on the first one.
+  '''Finger poke''' is emulated in scratchbox by the Middle Mouse button (NOTE: There is no Fullscreen VKB in scratchbox)
+  '''QInputEvents''' don't move the cursor.
+  It's mandatory to get working the HIM moving the cursor via QInputMethodEvents.
+  Why is it mandatory?
+  Because if the user select text with the finger from the right to the left, we are able to remove the highlighted text, but the
+  cursor will be moved on the last char instead to stay on the first one.
-To do that some changes has been added to some widget function like: ''widget::inputMethodEvent(QInputMethodEvent *e)''.
+  To do that some changes has been added to some widget function like: ''widget::inputMethodEvent(QInputMethodEvent *e)''.
-Modifing that function in some custom widgets may be necessary. Don't reimplementing that function will break some fullscreen virtual keyboard features.
+  Modifing that function in some custom widgets may be necessary.
+  Don't reimplementing that function will break some fullscreen virtual keyboard features.
-'''Hardcoded Keys:'''
+  '''Hardcoded Keys:'''
-In the QMainWindow:
+  In the QMainWindow:
-* F6 - Toggle fullscreen the application
+  - F6 - Toggle fullscreen the application
-* F4 - Shows/Hides the application context menu
+  - F4 - Shows/Hides the application context menu
-* Zoom in  - is a standard [http://doc.trolltech.com/4.4/qkeysequence.html#StandardKey-enum key sequence] QKeySequence::ZoomIn
+  - Zoom in  - is a standard [http://doc.trolltech.com/4.4/qkeysequence.html#StandardKey-enum key sequence] QKeySequence::ZoomIn
-* Zoom out - is a standard [http://doc.trolltech.com/4.4/qkeysequence.html#StandardKey-enum key sequence] QKeySequence::ZoomOut
+  - Zoom out - is a standard [http://doc.trolltech.com/4.4/qkeysequence.html#StandardKey-enum key sequence] QKeySequence::ZoomOut
-'''Input Method:'''
-Maemo Qt uses the Hildon IM as default Input method. Each kind of widget can set the IM mode. This allows the input method to focus on the type of input that the application is expecting. Eg: spinboxes can receive only numeric characters (1-9).
-NOTE: Qt widgets like QTextEdit, QLineEdit... set the right input method mode automatically.
-A developer can change it by using:
-<source lang="cpp-qt">
-void QInputContext::setInputMode(int mode);
-</source>
-It will update immediately the Hildon Input method to use the selected IM mode.
-HIC Modes:
+  '''Input Method:'''
-* <code>HILDON_GTK_INPUT_MODE_ALPHA</code> 	alphabetical characters and whitespace
+  Maemo Qt uses the Hildon IM as default Input method.
-* <code>HILDON_GTK_INPUT_MODE_NUMERIC</code> 	numbers 0-9 and the '-' character
+  Each kind of widget can set the IM mode. This allows the input method to focus on the type of input that the application is expecting.
-* <code>HILDON_GTK_INPUT_MODE_SPECIAL</code> 	special characters
+  Eg: spinboxes can receive only numeric characters (1-9).
-* <code>HILDON_GTK_INPUT_MODE_HEXA</code> 	hexadecimal characters; numbers 0-9, characters a-f, and A-F
-* <code>HILDON_GTK_INPUT_MODE_TELE</code> 	telephone numbers; numbers 0-9, whitespace, and the characters "pwPW/().-+*#?,"
-* <code>HILDON_GTK_INPUT_MODE_FULL</code> 	unrestricted entry mode, combination of the alpha, numeric and special modes.
-* <code>HILDON_GTK_INPUT_MODE_MULTILINE</code> 	the client contains multiple lines of text or accepts linebreaks in the input.
-* <code>HILDON_GTK_INPUT_MODE_INVISIBLE</code> 	do not echo or save the input in the IM when entering sensitive information such as passwords.
-* <code>HILDON_GTK_INPUT_MODE_AUTOCAP</code> 	automatically capitalize the first letter at the start of a sentence.
-* <code>HILDON_GTK_INPUT_MODE_DICTIONARY</code> 	enable predictive dictionaries and learning based on the input.
-Example:
-For a password field we need to set a specific IM mode:
-<source lang="cpp-qt">
-int mode = HILDON_GTK_INPUT_MODE_FULL | HILDON_GTK_INPUT_MODE_INVISIBLE
-QInputContext *qic = widget->inputContext();
-qic->setInputMode(mode);
-</source>
-If you are developing a Custom widget able to receive input text, you can instruct your widget to use the right IM Mode just returning the mode.
-- How does it work?
+  NOTE: Qt widgets like QTextEdit, QLineEdit... set the right input method mode automatically.
-The Hildon IM sends a XMessage to pop up the "Virtual Keyboard" (or better the Main HIM UI) when an input widget receive the focus. The IM before to raise the VKB, makes an inputMethodQuery to the widget retrieving the IM mode. If the developer of the custom widget doesn't set the mode property, the IM will use <code>HILDON_GTK_INPUT_MODE_FULL</code> (the default mode) for that widget.
+  A developer can change it by using:
-Setting the ImMode is quite easy. Check the code below for more understanding.
+    void QInputContext::setInputMode(int mode);
-<source lang="cpp-qt">
+  It will update immediately the Hildon Input method to use the selected IM mode.
-#ifdef Q_WS_HILDON
-#include <QInputContext>
+  HIC Modes:
-#endif
+    HILDON_GTK_INPUT_MODE_ALPHA 	alphabetical characters and whitespace
+    HILDON_GTK_INPUT_MODE_NUMERIC 	numbers 0-9 and the '-' character
-QVariant QAbstractSpinBox::inputMethodQuery(Qt::InputMethodQuery query) const
+    HILDON_GTK_INPUT_MODE_SPECIAL 	special characters
-{
+    HILDON_GTK_INPUT_MODE_HEXA 	hexadecimal characters; numbers 0-9, characters a-f, and A-F
-  Q_D(const QAbstractSpinBox);
+    HILDON_GTK_INPUT_MODE_TELE 	telephone numbers; numbers 0-9, whitespace, and the characters "pwPW/().-+*#?,"
-  switch(query) {
+    HILDON_GTK_INPUT_MODE_FULL 	unrestricted entry mode, combination of the alpha, numeric and special modes.
-      case Qt::ImMode:{
+    HILDON_GTK_INPUT_MODE_MULTILINE 	the client contains multiple lines of text or accepts linebreaks in the input.
-          int mode = HILDON_GTK_INPUT_MODE_NUMERIC;
+    HILDON_GTK_INPUT_MODE_INVISIBLE 	do not echo or save the input in the IM when entering sensitive information such as passwords.
-          return QVariant(mode);
+    HILDON_GTK_INPUT_MODE_AUTOCAP 	automatically capitalize the first letter at the start of a sentence.
-      }
+    HILDON_GTK_INPUT_MODE_DICTIONARY 	enable predictive dictionaries and learning based on the input.
-      default:
-          return d->edit->inputMethodQuery(query);
+  Example:
+    For a password field we need to set a specific IM mode:
+    int mode = HILDON_GTK_INPUT_MODE_FULL | HILDON_GTK_INPUT_MODE_INVISIBLE
+    QInputContext *qic = widget->inputContext();
+    qic->setInputMode(mode);
+  If you are developing a Custom widget able to receive input text, you can instruct your widget to use the right IM Mode just returning
+  the mode.
+  - How does it work?
+  The Hildon IM sends a XMessage to pop up the "Virtual Keyboard" (or better the Main HIM UI) when an input widget receive the focus.
+  The IM before to raise the VKB, makes an inputMethodQuery to the widget retrieving the IM mode.
+  If the developer of the custom widget doesn't set the mode property, the IM will use HILDON_GTK_INPUT_MODE_FULL (the default mode) for that widget.
+  Setting the ImMode is quite easy. Check the code below for more understanding.
+  #ifdef Q_WS_HILDON
+  #include <QInputContext>
+  #endif
+  QVariant QAbstractSpinBox::inputMethodQuery(Qt::InputMethodQuery query) const
+  {
+    Q_D(const QAbstractSpinBox);
+    switch(query) {
+        case Qt::ImMode:{
+            int mode = HILDON_GTK_INPUT_MODE_NUMERIC;
+            return QVariant(mode);
+        }
+        default:
+            return d->edit->inputMethodQuery(query);
+    }
    }
-}
-</source>
-==FREMANTLE (Qt 4.5)==
+=FREMANTLE (Qt 4.5)=
-===Kinetic scrolling===
+==Kinetic scrolling==
 Kinetic scrolling is enabled by default in QListWidgets and is supported by any Qt widget that inherits QScrollArea.
 Any item view widgets (QTreeView/QTreeWidget, QListView, QTableView/QTableWidget...) can use fingerscroll if it has "FingerScrollable" dynamic property set to true.
 Eg:
-<source lang="cpp-qt">
+  QTableWidget *table = new QTableWidget(this);
-QTableWidget *table = new QTableWidget(this);
+  table->setProperty("FingerScrollable", true);
-table->setProperty("FingerScrollable", true);
-</source>
 NOTE: Available in Qt > 4.5.3-xxxxx-maemo4
-===Hildon-Desktop widgets===
+==Hildon-Desktop widgets==
-{{main|Qt4 Hildon/Qt Hildon Widgets}}
+{{main|/Qt Hildon Widgets}}
 They are supported by Qt. An example (qt-example-hildondesktopwidget) is available in extras-devel.
-===Hildon menus===
+==Hildon menus==
 Maemo5 menus are created using QActions available in menu bar.
 Hidden, disabled, separators and widget actions won't shown. (Same in Qt 4.6)
@@ Line 275: / Line 292: @@
 Note: Maemo5 policy doesn't allow application to have more than 10 items.
-===Stackable windows===
+==Stackable windows==
 http://maemomm.garage.maemo.org/docs/tutorial/figures/stackable-window.png
 Are supported by Qt. To create them you need to create a MainWindow child of another Main window.
-<source lang="cpp-qt">
-QMainWindow *fistStackableWindow = new QMainWindow;
+ QMainWindow *fistStackableWindow = new QMainWindow;
-QMainWindow *secondStackableWindow = new QMainWindow(fistStackableWindow);
+ QMainWindow *secondStackableWindow = new QMainWindow(fistStackableWindow);
 // you need the below line to see the back button on the top right hand corner of the stacked window instead of a cross
-secondStackableWindow->setAttribute(Qt::WA_Maemo5StackedWindow);
+ secondStackableWindow->setAttribute(Qt::WA_Maemo5StackedWindow);
-</source>
 ''Note: this is not entirely accurate, see''
 http://qt.nokia.com/doc/qt-maemo-4.6/maemo5-stackedwindows.html
-===Raise a Qt application in background===
+==Raise a Qt application in background==
+QWidget::activateWindow() does the job.
-<code>QWidget::activateWindow()</code> does the job.
 Implemented in Qt packages >= qt-4.5.3-xxxx-maemo6
+== How to minimize a Qt application? ==
+ QDBusConnection c = QDBusConnection::sessionBus();
+ QDBusMessage m = QDBusMessage::createSignal("/","com.nokia.hildon_desktop","exit_app_view");
+ c.send(m);
-=== How to minimize a Qt application? ===
+==Portrait mode and listening for orientation changes==
-<source lang="cpp-qt">
-QDBusConnection c = QDBusConnection::sessionBus();
-QDBusMessage m = QDBusMessage::createSignal("/","com.nokia.hildon_desktop","exit_app_view");
-c.send(m);
-</source>
-===Portrait mode and listening for orientation changes===
 If you want to run your application in portrait mode then you can add these lines to your application. The code goes in your main widget constructor.
-<source lang="cpp-qt">
-#ifdef Q_WS_HILDON
-//Includes for portrait mode support
-# include <X11/Xlib.h>
-# include <X11/Xatom.h>
-# include <QtGui/QX11Info>
-#endif
-#ifndef Q_WS_HILDON
+ #ifdef Q_WS_HILDON
-int value = 1;
+ //Includes for portrait mode support
-Atom portraitSupport = XInternAtom(QX11Info::display(), "_HILDON_PORTRAIT_MODE_SUPPORT", false);
+ # include <X11/Xlib.h>
-Atom portraitRequest = XInternAtom(QX11Info::display(), "_HILDON_PORTRAIT_MODE_REQUEST", false);
+ # include <X11/Xatom.h>
-XChangeProperty(QX11Info::display(), winId(), portraitSupport, XA_CARDINAL, 32, PropModeReplace, (uchar *)&value, 1);
+ # include <QtGui/QX11Info>
-XChangeProperty(QX11Info::display(), winId(), portraitRequest, XA_CARDINAL, 32, PropModeReplace, (uchar *)&value, 1);
+ #endif
-#endif
-</source>
+ #ifndef Q_WS_HILDON
-If you want to listen for orientation changes and then switch the view to landscape or potrait mode automatically than take a look at [[Maemo Qt Extra Libraries]] for more information.
+ int value = 1;
+ Atom portraitSupport = XInternAtom(QX11Info::display(), "_HILDON_PORTRAIT_MODE_SUPPORT", false);
+ Atom portraitRequest = XInternAtom(QX11Info::display(), "_HILDON_PORTRAIT_MODE_REQUEST", false);
+ XChangeProperty(QX11Info::display(), winId(), portraitSupport, XA_CARDINAL, 32, PropModeReplace, (uchar *)&value, 1);
+ XChangeProperty(QX11Info::display(), winId(), portraitRequest, XA_CARDINAL, 32, PropModeReplace, (uchar *)&value, 1);
+ #endif
-=== QDockWidgets ===
+If you want to listen for orientation changes and then switch the view to landscape or potrait mode automatically than take a look at [[Maemo_Qt_Extra_Libraries]] for more information.
+== QDockWidgets ==
 QDockWidgets are not finger friendly widgets. They should not be used in Maemo.
 In case you are porting an application to Maemo maybe you want to do
 few changes as possible into your UI. Then you could use QDockWidget::setFeatures(QDockWidget::NoDockWidgetFeatures); to hide float and close button and lock the position of the dock widget.
-=== QPrint* and QSystemTray support missing ===
+== QPrint* and QSystemTray support missing ==
+ Printing (QPrint*) and System tray support is missing in current
+ Qt 4.5.3-xxxx-maemo4 packages.
+ Since incompatibility with KDE and other Qt application, they will be enabled again in next Qt 4.5.3 packages.
-Printing (QPrint*) and System tray support is missing in current Qt 4.5.3-xxxx-maemo4 packages. Since incompatibility with KDE and other Qt application, they will be enabled again in next Qt 4.5.3 packages.
+== QSplashScreen not fully compatible with Hildon-Desktop ==
+ QSplashScreen's window type is not supported in Fremantle. The splash screen is
-=== QSplashScreen not fully compatible with Hildon-Desktop ===
+ shown in full screen and the image is repeated to fill the splash screen's
+ window. When splash screen is closed normal window closing animation is shown
-QSplashScreen's window type is not supported in Fremantle. The splash screen is shown in full screen and the image is repeated to fill the splash screen's window. When splash screen is closed normal window closing animation is shown before showing the actual application window. For these reasons developers are disencouraged to use splash screens in their applications.
+ before showing the actual application window. For these reasons developers are
+ disencouraged to use splash screens in their applications.
 As a workaround for the problem you can set a window property that tells HD to skip the transitions:
-<source lang="cpp-qt">
   static void set_no_transitions (Display *dpy, Window w)
   {
@@ Line 347: / Line 363: @@
                    (unsigned char *)&one, 1);
   }
-</source>
-=== QToolBar limitations ===
+== QToolBar limitations ==
+Adding a QToolBar to a QMainWindow will always result in a toolbar at the
+bottom of the screen. (Justification/Workarounds?)
-Adding a QToolBar to a QMainWindow will always result in a toolbar at the bottom of the screen. (Justification/Workarounds?)
+<br><br>
-== Contributing to the Maemo Qt Project ==
+=FREMANTLE (Qt 4.6)=
+Here an example that shows several maemo5 Qt widgets in Qt 4.6.
-Maemo Qt is a community project. Contributing to the forum, sending us patches, give us feedbacks, tracking bugs are all activities that help us to improve the quality of our work.
+http://qt.nokia.com/doc/qt-maemo-4.6/examples-maemo5.html
-Here there is a list of things that every person interested in helping us should read.
+http://qt.gitorious.org/+qt-developers/qt/x11-maemo/trees/986340bb5e4b69ceb0a959c2a067a1ed5e504d50/examples/maemo5/widgets
-===Stay updated===
+==Finger Scrolling==
-Any Maemo Qt developer should be updated and should participate to the discussions, for that he must join the Mailing list. BTW the mailing list is not for Maemo Qt Developers but it's open to Maemo Qt application developers too.
+Kinetic scrolling is present by default in most scrolling widgets, eg. <code>QTextBrowser</code>, <code>QTableView</code>. If you want to tweak the kinetic scrolling parameters like inertia and acceleration then you can instaniate a <code>QAbstractKineticScroller</code> object like this:
+ QAbstractKineticScroller ks =
+   scrollArea->property("kineticScroller").value<QAbstractKineticScroller *>();
+where scrollArea could be <code>QScrollArea</code> with some widgets added to it, or you could use implementations like <code>QTextBrowser</code>.
+You can tweak scrolling like this:
+ ks->setDragInertia( (double)value / 100.0)
+ ks->setMode(QAbstractKineticScroller::PushMode)
+etc., refer to the examples here for details: http://qt.gitorious.org/+qt-developers/qt/x11-maemo/blobs/4.6-fremantle/examples/maemo5/kineticscroller/main.cpp
+==QSplashScreen==
+Should be fixed in Qt 4.6. SplashWindow type is not supported by Fremantle WM. Qt 4.6 display splash screen using popup window type.
+==Orientation==
+[http://qt.nokia.com/doc/qt-maemo-4.6/maemo5-rotation.html Official documentation]
+==Maemo5 Readme file==
+There is a [http://qt.gitorious.org/+qt-developers/qt/x11-maemo/blobs/4.6-fremantle/README.maemo5 README file in Qt 4.6 source tree].
+= [[Image:Helmet.png]] Contributing to the Maemo Qt Project =
+Maemo Qt is a community project. Contributing to the forum, sending us patches, give us feedbacks, tracking bugs are all activities that help us to improve the quality of our work.
+Here there is a list of things that every person interested in helping us should read.
-=== Introduction to Git ===
+==Stay updated==
+Any Maemo Qt developer should be updated and should participate to the discussions, for that he must join the Mailing list.
+BTW the mailing list is not for Maemo Qt Developers but it's open to Maemo Qt application developers too.
+== Introduction to Git ==
 If you are a git newbie you maybe find interesting these links:
 * http://www.sourcemage.org/Git_Guide
@@ Line 371: / Line 418: @@
 * Using the git protocol through a HTTP CONNECT proxy: http://www.emilsit.net/blog/archives/how-to-use-the-git-protocol-through-a-http-connect-proxy/
-===Understanding the structure of our Git repository===
+==Understanding the structure of our Git repository==
 {{main|Qt Maemo Git Process}}
-=== Preparation ===
+== Preparation ==
 Make sure each scratchbox target has
@@ Line 383: / Line 430: @@
 (you may need to apt-get install libgl-dev too as it's not in the Build-Depends: yet)
-===Building Qt from Git repository===
+==Building Qt from Git repository==
-# Clone the repository:<pre>git clone git://gitorious.org/+qt-maemo-developers/qt/qt-maemo.git</pre>or if you are a member of our team:<pre>git clone git@gitorious.org:+qt-maemo-developers/qt/qt-maemo.git</pre>
+# Clone the repository:<br/><pre>git clone git://gitorious.org/+qt-maemo-developers/qt/qt-maemo.git</pre><br/>or if you are a member of our team:<br/><pre>git clone git@gitorious.org:+qt-maemo-developers/qt/qt-maemo.git</pre>
-# Change dir:<pre>cd qt-maemo</pre>
+# Change dir:<br/><pre>cd qt-maemo</pre>
-# Copy the remote 4.5 branch in your working copy:<pre>git checkout -b 4.5 origin/4.5</pre>
+# Copy the remote 4.5 branch in your working copy:<br/><pre>git checkout -b 4.5 origin/4.5</pre>
-# Checkout ONE of these branches:<pre>git checkout -b qt-diablo origin/qt-diablo</pre><pre>git checkout -b qt-n900+w34 origin/qt-n900+w34</pre><pre>git checkout -b qt-mer origin/qt-mer</pre>
+# Checkout ONE of these branches:<br/><pre>git checkout -b qt-diablo origin/qt-diablo</pre><br/><pre>git checkout -b qt-n900+w34 origin/qt-n900+w34</pre><br/><pre>git checkout -b qt-mer origin/qt-mer</pre>
-# Build the packages:<pre>dpkg-buildpackage -rfakeroot -b</pre>
+# Build the packages:<br/><pre>dpkg-buildpackage -rfakeroot -b</pre>
-===Merging branches changes in the mainline [OLD]===
+==Merging branches changes in the mainline [OLD]==
 Before to merge your changes in the mainline, the code must be full working, cleaned and tested. A review from another developer is also needed in order to reduce the possibility to add errors.
+<br><br>
-===QML===
+==QML==
 [[QML]] is a GUI interface building scripting language for Qt. Check out the [[QML-EnhancedCalcExample | QML calculator example]].
-==F.A.Q.==
+=[[Image:Help-contents.png]] F.A.Q.=
 ; ''I'm trying to compile a Qt application for ARMEL, but I got the error below. What's wrong?''
@@ Line 415: / Line 464: @@
 : libqt4-dev should copy all header files, but now, at least in 4.5.2-1maemo1, some files are missing. Please download file below and extract to your scratchbox system.
 : <pre>http://qt4.garage.maemo.org/patches/qt4-missing-header.tgz</pre>
 [[Category:Development]]
 [[Category:Qt]]