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== Introduction ==
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[[Image:MaemoQtPicture.png]]
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<br><br>
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== [[Image:Intro.png]] Intro ==
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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.
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=== Maemo Platform ===
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== Maemo platform ==
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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, and GNOME.<ref>[http://en.wikipedia.org/wiki/Maemo_Platform Maemo Platform on Wikipedia]</ref>
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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.
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[http://maemo.org/intro/platform/ Read more...]
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Read more about [http://maemo.org/intro/platform/ the Maemo platform] and a [http://maemo.org/intro/developer_overview/ developer overview].
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=== What is Hildon? ===
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== Getting started ==
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Hildon is an application framework for Linux operating system mobile devices (PDAs, mobile phones, etc), developed by Nokia for Maemo and now a part of GNOME, that focuses on providing a finger friendly interface.<ref>[http://en.wikipedia.org/wiki/Hildon Hildon on Wikipedia]</ref>
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To start to develop with Maemo Qt, we need to [[Documentation/Maemo_5_Final_SDK_Installation|install the Maemo SDK]].
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[http://live.gnome.org/Hildon Read more...]
 +
 
 +
=== Developing on Maemo ===
 +
 
 +
Developing applications for Maemo is done with the Maemo SDK. The process from creating the first prototype of your application to distributing to a wide audience consists basically of three steps:
 +
 
 +
* Share your application project in the [http://garage.maemo.org Garage].
 +
* Make your application easy to install and put in the [[Extras]].
 +
* Once your application has a high quality - be promoted to the [http://www.nokia.com/os2008 Nokia user site].
 +
 
 +
[http://maemo.org/intro/developer_overview/ Read more...]
 +
 
 +
=== Maemo SDK ===
 +
 
 +
The Maemo SDK is based around the Debian-oriented Scratchbox Cross Compilation Toolkit, which provides a sandbox environment in which development may take place. Scratchbox uses Qemu to emulate an ARMEL processor or sbrsh to remotely execute instructions. Scratchbox-compatible rootstraps are available for both x86 and ARMEL, so the majority of development and debugging takes place on x86, with final packaging being for ARMEL.<ref>[http://en.wikipedia.org/wiki/Maemo_Platform#Maemo_SDK Maemo SDK on Wikipedia]</ref>
 +
 
 +
[http://www.youtube.com/watch?v=c8myh_iBy8k Watch the Maemo SDK in action!]
 +
 
 +
=== What is Scratchbox? ===
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 +
Scratchbox is a cross compilation toolkit designed to make embedded Linux application development easier. It also provides a full set of tools to integrate and cross compile an entire Linux distribution.<ref>[http://en.wikipedia.org/wiki/Scratchbox Scratchbox on Wikipedia]</ref>
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 +
[http://www.scratchbox.org/ Read more...]
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 +
<br>
 +
 
 +
== [[Image:Rocket.png]] Getting started ==
 +
 
 +
To start to develop with Maemo Qt, we need to install the Maemo SDK on a Linux machine.
 +
 
 +
=== Hey, I don't have a Linux machine! ===
 +
That's not a big problem. You can run Maemo SDK in a virtual machine;
 +
You can download Maemo SDK virtual Image (Linux Ubuntu + Diablo and Fremantle SDK)
 +
from [http://tablets-dev.nokia.com/maemo-dev-env-downloads.php tablets-dev.nokia.com].
 +
You can get VMPlayer from [http://www.vmware.com/products/player/ here].
 +
 
 +
=== Installing the Maemo SDK ===
 +
Maemo SDK can be installaed in any Linux environment.
 +
However Debian based distros (eg: Ubuntu) are recommended.
 +
 
 +
Documentation you need to install Maemo SDK is [http://maemo.org/development/sdks/ here].
=== Installing Qt packages in Scratchbox ===
=== Installing Qt packages in Scratchbox ===
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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).
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Maemo Qt developers offers a set of Qt packages for Diablo (Maemo4.1 - OS2008)
 +
and Fremantle (Maemo5 - OS2009).
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=== Fremantle ===
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==== Diablo ====
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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:
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Diablo Qt packages are into the official Extras repository.
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fakeroot apt-get install libqt4-dev
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In order to start to develop with those packages you need to add
 +
extras repository to your repository list.
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==== Using Qt 4.6 in Fremantle ====
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1. Open /etc/apt/source.list with a text editor (eg: kate, gedit...)
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2. Append the following line to that file:
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    deb http://repository.maemo.org/extras/ diablo free non-free
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3. Then update your APT cache with
 +
      <i>apt-get update</i>
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4. Install Qt packages with
 +
      <i>apt-get install libqt4-dev</i>
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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:
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==== Fremantle ====
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fakeroot apt-get update
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You don't need to add any extra repository for Fremantle since Qt packages are already available into the SDK. You can find more information on installing Qt on Fremantle, and help improve Qt on Maemo, [[QT/Testing | on the Qt testing page]].
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fakeroot apt-get dist-upgrade
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=== Diablo ===
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Then you can install Qt with:
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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:
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  [sbox-FREMANTLE_X86: ~] > fakeroot apt-get install libqt4-gui libqt4-dev
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apt-get install libqt4-dev
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==How to compile a Qt application in scratchbox==
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==== Using Qt 4.6 Betas in Fremantle ====
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Qt applications are usually built using QMake. Project like KDE instead replaced QMake with CMake for more flexibility.
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If you want to test your applications with the latest Qt 4.6 Beta version, either compile it [[Qt_Maemo_Git_Process|directly from the git repos]] or install the libqt4-maemo5-dev package.
 +
 
 +
For the latter you need to enable access to the extra devel repositories first (if you haven't done so yet). Inside of scratchbox, for your i486 target (ARM is very similar), do the following:
 +
 
 +
  [sbox-FREMANTLE_X86: ~] > fakeroot echo "deb http://repository.maemo.org/extras/ fremantle free non-free" >> /etc/apt/sources.list
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  [sbox-FREMANTLE_X86: ~] > fakeroot echo "deb-src http://repository.maemo.org/extras/ fremantle free" >> /etc/apt/sources.list
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  [sbox-FREMANTLE_X86: ~] > fakeroot echo "deb http://repository.maemo.org/extras-devel fremantle free non-free" >> /etc/apt/sources.list
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  [sbox-FREMANTLE_X86: ~] > fakeroot echo "deb-src http://repository.maemo.org/extras-devel fremantle free" >> /etc/apt/sources.list
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 +
To install the tech preview:
 +
  [sbox-FREMANTLE_X86: ~] > fakeroot apt-get update
 +
  [sbox-FREMANTLE_X86: ~] > fakeroot apt-get remove libqt4*
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  [sbox-FREMANTLE_X86: ~] > fakeroot apt-get install libqt4-maemo5-dev
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 +
Qt is installed to /opt/qt4-maemo5.
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 +
If you happen to use autotools, this will recompile the code against the beta:
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  [sbox-FREMANTLE_X86: ~] > cd ~/your/project/folder
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  [sbox-FREMANTLE_X86: ~] > make distclean #dont worry if it fails
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  [sbox-FREMANTLE_X86: ~] > ./autogen.sh QT_PATH=/opt/qt4-maemo5/bin
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  [sbox-FREMANTLE_X86: ~] > make
 +
 
 +
For qmake you might have to set the QT_INSTALL_PREFIX correctly.
 +
 
 +
===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.
   
   
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=== QMake ===
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==== 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
[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:
You can build your Maemo Qt application in 3 simple steps:
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# Generating project file (Required if there is no .pro file into the app source tree)<pre>qmake -project</pre>
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1. Generating project file [Required if there is not .pro file into the app source tree]
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# Generating Makefile from the QMake project file:<pre>qmake file.pro</pre>
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    <i>qmake -project</i>
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# <pre>make</pre>
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2. Generating Makefile from the QMake project file:
 +
    qmake file.pro
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3. make
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=== CMake ===
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==== CMake ====
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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.
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As told before it's not a standard tool but it's largely used from people and application coming from the [[KDE]] world.
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CMake projects usually have a <code>CMakeLists.txt</code> file instead of:
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Because of some issue with [[CMake]], [[Diablo]] CMake packages are currently useless since CMake segfaults (on the device at least).
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# .pro file used by QMake projects
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# <code>Makefile.am</code> used by Autotools projects (standard in Unix/Linux)
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-
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.
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This issue has been solved in [[Fremantle]] and CMake packages that comes from Fremantle [[SDK]] work nicely.
-
cmake path
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-
make
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Note: CMake is not installed by default in [[:Category:Scratchbox|scratchbox]]. You can install it with the command:
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- CMake projects has usually a CMakeLists.txt file instead of
-
fakeroot apt-get install cmake
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    - .pro file used by QMake projects
 +
    - Makefile.am used by Autotools projects (standard in Unix/[[Linux]])
-
== Running a Qt application in: ==
+
Using CMake to build the project is extremely easy.
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=== Scratchbox ===
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In the directory containing CMakeLists.txt, supply the following two commands, where path is the path to the source code.
-
Diablo and Fremantle Qt applications can run on the device as in Scratchbox.
+
 
 +
- cmake path
 +
- make
 +
 
 +
Note: CMake is not installed by default in [[scratchbox]]. You can install it with
 +
<i>fakeroot apt-get install cmake</i>
 +
 
 +
===Running a Qt application in: ===
 +
====A. 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:
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>
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1. Run Xephyr. It's able to run a [http://en.wikipedia.org/wiki/X_Window_System X Server] inside another X Server.  
-
# Set display for application that runs inside scratchbox:<pre>export DISPLAY=:2</pre>
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<i>Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -kb</i>
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# 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>
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2. Set display for application that runs inside scratchbox
 +
<i><b>[sbox-DIABLO_<target>:~] ></b> export DISPLAY=:2</i>
-
Note: <code>run-standalone.sh</code> sets some variable needed by Qt to use the Hildon style.
+
3. You can now run the SDK UI. Diablo or Fremantle desktop will appear into your Xephyr window:
 +
<i><b>[sbox-DIABLO_<target>:~] ></b> af-sb-init.sh start</i>
-
=== Device ===
+
4. Now you are ready to run any Maemo or Maemo Qt application with
-
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).
+
<i><b>[sbox-DIABLO_<target>:~] ></b> run-standalone.sh ./qtapps</i>
-
Fore example, if we want to run quassel (Qt IRC Client) we have to launch it with:
+
Note: run-standalone.sh sets some variable needed by Qt to use the Hildon style.
-
su -c ./quassel user
+
-
== Porting Qt applications to Maemo ==
+
====B. device====
 +
Maemo Qt applications are linux binaries. They can run into the device without any problem if you copy it/them in "partitions" mounted with exec flag. (Eg: /home/user or /opt in Fremantle).
-
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.
+
Eg: If we want to run quassel (Qt IRC Client) we have to launch it with:
 +
<b>Nokia-N900-44-1:/home/user#</b> su -c ./quassel user
 +
 
 +
<br><br>
 +
 
 +
== [[Image:Hammer.png]] Porting Qt applications to Maemo ==
 +
 
 +
===Intro===
 +
 
 +
Porting a Qt desktop application to Maemo requires very little effort. This 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:
Hildon Style is the default Qt application style. Other style available are:
-
* [http://doc.trolltech.com/4.5/gallery-cleanlooks.html QCleanLooks]
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* [http://doc.trolltech.com/4.4/gallery-cleanlooks.html QCleanLooks]
-
* [http://doc.trolltech.com/4.5/gallery-windows.html Windows]
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* [http://doc.trolltech.com/4.4/gallery-windows.html Windows]
-
* [http://doc.trolltech.com/4.5/gallery-plastique.html Plastique]
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* [http://doc.trolltech.com/4.4/gallery-plastique.html Plastique]
Qt application can use other Qt styles;
Qt application can use other Qt styles;
* Running your application with the style flag:
* Running your application with the style flag:
-
./qt-test-application -style windows
+
<i>./qt-test-application -style windows</i>
-
* 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====
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====Using the Kinetic Finger Scrolling (cf Gtk's PannableArea)====
====Using the Kinetic Finger Scrolling (cf Gtk's PannableArea)====
-
 
See [[Qt/Finger Scrolling|Finger Scrolling]]
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">
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* <b>Qt 4.5 (Diablo and Fremantle)</b>
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#ifdef Q_WS_HILDON
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#ifdef Q_WS_HILDON
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  //Specific hildon/Maemo5 code here  
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    //Specific hildon/Maemo5 code here  
-
#endif
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#endif
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</source>
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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)
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)
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}
}
-
=== Home widget interaction ===
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* <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 {}".
-
{{main|Qt4 and Hildon home widget interaction}}
+
#ifdef Q_WS_MAEMO_5
 +
    //specific hildon/maemo5 code here
 +
#endif
 +
 
 +
maemo5 {
 +
    message("Hello Hildon")
 +
    SOURCE += hildon.cpp
 +
    HEADER += hildon.h
 +
    FORMS  += hildon.ui
 +
}
===Limitations===
===Limitations===
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'''At the moment, creating a Qt application that follows Maemo 5 UI Style requires using custom Qt widgets, coded within the application itself'''.
'''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 ==
+
<br>
 +
<br>
-
{{main|Documentation/Maemo_5_Developer_Guide/Kernel_and_Debugging_Guide/Maemo_Debugging_Guide}}
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== [[Image:Bug.png]] Debugging a Qt application ==
-
'''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.
+
===GDB ===
-
[http://chaos.troll.no/~harald/gdb7/ Here you can find GDB7 for fremantle x86 and armel].
+
-
/usr/local/bin/gdb7 ./myapp
+
-
== Profiling a Qt application ==
+
====Intro ====
 +
 
 +
The GNU Project Debugger, or gdb for short, is a general purpose debugger that can be used for various debugging purposes.
 +
 
 +
====Debugging a Qt application in Scratchbox====
 +
 
 +
TODO
 +
 
 +
====Debugging a Qt application on device====
 +
=====Using gdb=====
 +
Fast way is running gdb ./your app.
 +
 
 +
=====Using gdb & gdbserver=====
 +
<ol>
 +
<li>Installing gdb on the device.<ol>
 +
<li>Add the [http://maemo.org/development/tools/ SDK tools] repository to the catalogue list.</li>
 +
<li>install gdb by using apt-get (require around 6 MB of space)</li>
 +
</ol></li>
 +
<li>Install the debug symbols files in scratchbox (ARMEL target)</li>
 +
apt-get install libqt4-dbg
 +
<li>Run the application (device side)</li>
 +
$gdbserver 0.0.0.0:1234 ./qtApplication
 +
<li>Run the gdb client on your host PC (scratchbox side)</li>
 +
[sbox-DIABLO_ARMEL: ~/TEST/svn/qt4-x11-4.4.0/examples/widgets/tablet] > gdb ./qtApplication
 +
<li>Set the target of gdb</li>
 +
(gdb) target remote 172.21.37.117:1234
 +
<li>Tell to gdb to continue to debug the application on the device</li>
 +
(gdb) continue
 +
<li>Wait some moments...</li>
 +
<li>If necessary you can put break points; eg: for void QWidget::setPalette ( const QPalette & )</li>
 +
(gdb) break QWidget::setPalette(QPalette const&)
 +
Breakpoint 1 at 0x4026ae68
 +
 
 +
<li>Your application will appear on the device screen. Happy debugging!</li></ol>
 +
 
 +
'''Note''': Fremantle Gdb 6.8 crashes in x86 and gives messed up backtraces onto the device. Using gdb 7.0 is recommended. You can get gdb 7.0 sources fromhttp://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]
 +
 
 +
===Links===
 +
 
 +
* [http://www.gnu.org/software/gdb/documentation/ GDB documentation & tutorials]
 +
* [http://maemo.org/development/documentation/man_pages/gdbserver/ GDBServer man page]
 +
* [http://maemo.org/maemo_release_documentation/maemo4.1.x/node15.html Maemo debugging guide]
 +
* [http://repository.maemo.org/pool/diablo/free/g/gdb/ gdb debian package for Diablo]
 +
 
 +
<br><br>
 +
 
 +
== [[Image:chart.png]] Profiling a Qt application ==
=== OProfile ===
=== OProfile ===
-
{{main|Documentation/devtools/maemo5/oprofile}}
+
OProfile is a low overhead system-wide profiler for Linux. It can be used to find CPU usage bottlenecks in the whole system and within processes. It works fine in the device, but viewing the reports can take quite a long time (10 minutes) when fired up on N800/N810 devices. Therefore, it often makes sense to run opreport in scratchbox.
 +
 
 +
If you want to know more about OProfile in Maemo see the [http://maemo.org/development/tools/doc/chinook/oprofile/ documentation].
=== Valgrind ===
=== Valgrind ===
 +
Valgrind runs programs on a virtual processor and can detect memory errors (e.g., misuse of malloc and free) and race conditions in multithread programs.
-
{{main|Documentation/devtools/maemo5/valgrind}}
+
It performs a [http://en.wikipedia.org/wiki/Dynamic_program_analysis Dynamic program analysis] (In a few words,dynamic stands for analysis performed while executing the program).
-
== Packaging a Qt application for Maemo ==
+
It's very useful tool to track memory leaks
-
{{main|Packaging a Qt application}}
+
run-standalone.sh valgrind --tool=memcheck --leak-check=yes ./Application
 +
or
 +
run-standalone.sh valgrind --leak-check=full ./Application
-
== Maemo Qt API Reference ==
+
You can learn more about valngrind at http://www.cprogramming.com/debugging/valgrind.html
-
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.
+
<br><br>
-
===Diablo===
+
== [[Image:chart.png]] Qt benchmarks ==
 +
2D graphic benchmark tools:
-
'''QString QDesktopServices::storageLocation(StandardLocation type)''' returns specific Maemo locations for these types:
+
* [[Qt/Benchmark/qgear|QGears]]
-
* DesktopLocation:  QDir::homePath() + QLatin1String("/MyDocs"),            instead of QDir::homePath() + QLatin1String("/Desktop")
+
3D graphic benchmark tools:
-
* 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
+
* TODO
 +
<br><br><br>
-
'''Finger poke''' is emulated in scratchbox by the Middle Mouse button (NOTE: There is no Fullscreen VKB in scratchbox)
+
== [[Image:package.png]] Packaging a Qt application for Maemo ==
-
'''QInputEvents''' don't move the cursor.
+
{{main|Packaging a Qt application}}
-
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:'''
+
<br><br>
-
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).
+
== [[Image:Helmet.png]] Maemo Qt API Reference ==
-
NOTE: Qt widgets like QTextEdit, QLineEdit... set the right input method mode automatically.  
+
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.
-
A developer can change it by using:
+
===Diablo===
-
<source lang="cpp-qt">
+
  '''QString QDesktopServices::storageLocation(StandardLocation type)''' returns specific Maemo locations for these types:
-
void QInputContext::setInputMode(int mode);
+
  - DesktopLocation:  QDir::homePath() + QLatin1String("/MyDocs"),            instead of QDir::homePath() + QLatin1String("/Desktop")
-
</source>
+
  - DocumentsLocation: QDir::homePath() + QLatin1String("/MyDocs/.documents"), instead of QDir::homePath() + QLatin1String("/MyDocs/.documents")
-
It will update immediately the Hildon Input method to use the selected IM mode. 
+
  - PicturesLocation:  QDir::homePath() + QLatin1String("/MyDocs/.images"),    instead of QDir::homePath() + QLatin1String("/Pictures")
-
 
+
  - MusicLocation:    QDir::homePath() + QLatin1String("/MyDocs/.sounds"),   instead of QDir::homePath() + QLatin1String("/Music")
-
HIC Modes:
+
  - MoviesLocation:    QDir::homePath() + QLatin1String("/MyDocs/.videos"),    instead of QDir::homePath() + QLatin1String("/MyDocs/.videos")
-
* <code>HILDON_GTK_INPUT_MODE_ALPHA</code> alphabetical characters and whitespace
+
-
* <code>HILDON_GTK_INPUT_MODE_NUMERIC</code> numbers 0-9 and the '-' character
+
-
* <code>HILDON_GTK_INPUT_MODE_SPECIAL</code> special characters
+
-
* <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:
+
  '''QTabletEvents''' are able to get the pressure value from the touchscreen.
-
For a password field we need to set a specific IM mode:
+
  - The eventdeviceType is for the touchscreen is set to QTabletEvent::Stylus.
-
<source lang="cpp-qt">
+
  - QTabletEvents won't be used anymore in Fremantle
-
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?
+
  '''Finger poke''' is emulated in scratchbox by the Middle Mouse button (NOTE: There is no Fullscreen VKB in scratchbox)
-
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.
+
-
 
+
  '''QInputEvents''' don't move the cursor.
-
Setting the ImMode is quite easy. Check the code below for more understanding.
+
  It's mandatory to get working the HIM moving the cursor via QInputMethodEvents.
-
<source lang="cpp-qt">
+
  Why is it mandatory? 
-
#ifdef Q_WS_HILDON
+
  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
-
#include <QInputContext>
+
  cursor will be moved on the last char instead to stay on the first one.
-
#endif
+
 
 +
  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
-
QVariant QAbstractSpinBox::inputMethodQuery(Qt::InputMethodQuery query) const
+
  '''Input Method:'''
-
{     
+
  Maemo Qt uses the Hildon IM as default Input method.
-
  Q_D(const QAbstractSpinBox);
+
  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.
-
  switch(query) {
+
  Eg: spinboxes can receive only numeric characters (1-9).
-
      case Qt::ImMode:{
+
 
-
          int mode = HILDON_GTK_INPUT_MODE_NUMERIC;
+
  NOTE: Qt widgets like QTextEdit, QLineEdit... set the right input method mode automatically.
-
          return QVariant(mode);
+
 
-
      }
+
  A developer can change it by using:
-
      default:
+
    void QInputContext::setInputMode(int mode);
-
          return d->edit->inputMethodQuery(query);
+
  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);
 +
    }
   }
   }
-
}
 
-
</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.
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.
Any item view widgets (QTreeView/QTreeWidget, QListView, QTableView/QTableWidget...) can use fingerscroll if it has "FingerScrollable" dynamic property set to true.
Eg:
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
NOTE: Available in Qt > 4.5.3-xxxxx-maemo4
-
===Hildon-Desktop widgets===
+
====Hildon-Desktop widgets====
-
 
+
-
{{main|Qt4 Hildon/Qt Hildon Widgets}}
+
-
 
+
They are supported by Qt. An example (qt-example-hildondesktopwidget) is available in extras-devel.
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.  
Maemo5 menus are created using QActions available in menu bar.  
Hidden, disabled, separators and widget actions won't shown. (Same in Qt 4.6)
Hidden, disabled, separators and widget actions won't shown. (Same in Qt 4.6)
Line 275: Line 445:
Note: Maemo5 policy doesn't allow application to have more than 10 items.
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
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.
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
// 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====
-
 
+
QWidget::activateWindow() does the job.
-
===Raise a Qt application in background===
+
-
 
+
-
<code>QWidget::activateWindow()</code> does the job.
+
Implemented in Qt packages >= qt-4.5.3-xxxx-maemo6
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.
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.
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
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.
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
 +
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.
-
=== QSplashScreen not fully compatible with Hildon-Desktop ===
+
<br><br>
-
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.
+
===FREMANTLE (Qt 4.6)===
 +
Here an example that shows several maemo5 Qt widgets in Qt 4.6.
-
As a workaround for the problem you can set a window property that tells HD to skip the transitions:
+
http://qt.nokia.com/doc/qt-maemo-4.6/examples-maemo5.html
-
<source lang="cpp-qt">
+
-
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);
+
-
}
+
-
</source>
+
-
=== QToolBar limitations ===
+
http://qt.gitorious.org/+qt-developers/qt/x11-maemo/trees/986340bb5e4b69ceb0a959c2a067a1ed5e504d50/examples/maemo5/widgets
-
Adding a QToolBar to a QMainWindow will always result in a toolbar at the bottom of the screen. (Justification/Workarounds?)
+
====Finger Scrolling====
 +
* Qt 4.6 tp2
 +
<s>QListView listView;
 +
new QMaemo5KineticScroller(&listView);</s>
-
== Contributing to the Maemo Qt Project ==
+
<s>The ctor for QMaemo5KineticScroller for widgets seems protected now, hence the above cant be done.
 +
So to have Kinetic Scrolling we can do this :
 +
 
 +
QAbstractScrollArea areaToScroll
 +
new QMaemo5KineticScroller(&areaToScroll);</s>
 +
 
 +
Kinetic scrolling is *now* present by default in most scrolling widgets
 +
eg. QTextBrowser, QTableView
 +
 
 +
If you want to tweak the kinetic scrolling parameters like inertia and acceleration
 +
then you can instaniate a QAbstractKineticScroller object like this.
 +
 
 +
QAbstractKineticScroller ks =
 +
  scrollArea->property("kineticScroller").value<QAbstractKineticScroller *>();
 +
 
 +
where scrollArea could be QScrollArea with some widgets added to it
 +
or you could use implementations like QTextBrowser
 +
 
 +
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 README file in Qt 4.6 source tree. You could check it clicking [http://qt.gitorious.org/+qt-developers/qt/x11-maemo/blobs/4.6-fremantle/README.maemo5 Here].
 +
 
 +
== [[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.
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.
Line 359: Line 552:
Here there is a list of things that every person interested in helping us should read.
Here there is a list of things that every person interested in helping us should read.
-
===Stay updated===
+
===Be updated===
-
 
+
Any Maemo Qt developer should be updated and should participate to the discussions, for that he must join the Mailing list.
-
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.
+
BTW the mailing list is not for Maemo Qt Developers but it's open to Maemo Qt application developers too.
=== Introduction to Git ===
=== Introduction to Git ===
-
 
If you are a git newbie you maybe find interesting these links:
If you are a git newbie you maybe find interesting these links:
* http://www.sourcemage.org/Git_Guide
* http://www.sourcemage.org/Git_Guide
Line 372: Line 564:
===Understanding the structure of our Git repository===
===Understanding the structure of our Git repository===
 +
These info are here:[[Qt Maemo Git Process]].
-
{{main|Qt Maemo Git Process}}
 
-
=== Preparation ===
 
 +
=== Preparation ===
Make sure each scratchbox target has
Make sure each scratchbox target has
Line 383: Line 575:
(you may need to apt-get install libgl-dev too as it's not in the Build-Depends: yet)
(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 rep===
-
# 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:
-
# Change dir:<pre>cd qt-maemo</pre>
+
git clone git://gitorious.org/+qt-maemo-developers/qt/qt-maemo.git  
-
# Copy the remote 4.5 branch in your working copy:<pre>git checkout -b 4.5 origin/4.5</pre>
+
or if you are a member of our team:
-
# 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>
+
git clone git@gitorious.org:+qt-maemo-developers/qt/qt-maemo.git
-
# Build the packages:<pre>dpkg-buildpackage -rfakeroot -b</pre>
+
 
 +
* Change dir
 +
cd qt-maemo
 +
 
 +
* Copy the remote 4.5 branch in your workingcopy
 +
git checkout -b 4.5 origin/4.5
 +
 
 +
* Checkout ONE of these branches:  
 +
git checkout -b qt-diablo   origin/qt-diablo
 +
git checkout -b qt-n900+w34 origin/qt-n900+w34
 +
git checkout -b qt-mer       origin/qt-mer
 +
 
 +
* Build the packages:
 +
dpkg-buildpackage -rfakeroot -b
 +
 
 +
 
 +
 
 +
===Commit changes in SVN [OLD]===
 +
 
 +
If you are a Maemo Qt developer and you want to save your changes in the Garage SVN but your project is not ready to go to the main line (trunk/qt-x11), you should create a private branch and then work there until the merging with the mainline.
 +
 
 +
For that you have to create a your directory in branches/ named ''developer_name-qt''. After that you can copy trunk/qt-x11 in your directory.
 +
svn copy --username developer_name https://garage.maemo.org/svn/qt4/trunk/qt-x11 https://garage.maemo.org/svn/qt4/branches/developer_name-qt -m "Creating private branch of trunk/qt-x11"
 +
 
 +
NOTE: Subversion uses cheap copy, so them don't increase the size of the repository. Then feel free to create your own branch.
===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.
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===
+
==[[Image:Help-contents.png]] F.A.Q.==
-
[[QML]] is a GUI interface building scripting language for Qt. Check out the [[QML-EnhancedCalcExample | QML calculator example]].
+
-
==F.A.Q.==
+
=== I'm trying to compile a Qt application for ARMEL, but I got the error below. What's wrong? ===
-
; ''I'm trying to compile a Qt application for ARMEL, but I got the error below. What's wrong?''
+
/targets/FREMANTLE_X86/usr/include/qt4/QtCore/qatomic_i386.h:127: error: impossible constraint in 'asm'
-
: <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?
+
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.
-
: <pre>In file included from maemo/gconfsymbols.cpp:41:
+
 
-
  maemo/gconfsymbols_p.h:49:25: gconf/gconf.h: No such file or directory</pre>
+
=== I'm trying to compile a Qt packcage for x86, but I got the error below. What's wrong? ===
-
: 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.
+
 
 +
In file included from maemo/gconfsymbols.cpp:41:
 +
  maemo/gconfsymbols_p.h:49:25: gconf/gconf.h: No such file or directory
 +
 
 +
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.
 +
 
 +
http://qt4.garage.maemo.org/patches/qt4-missing-header.tgz
 +
 
 +
 
 +
 
 +
===QML===
 +
http://wiki.maemo.org/QML
-
; 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
+
== References ==
-
: 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
+
<references/>
-
: 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:Development]]
[[Category:Qt]]
[[Category:Qt]]

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