Native Application Development With Qt
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The document discusses developing Qt applications for the Nokia N900 mobile device. It covers using Qt Creator as an IDE, developing the UI and integrating accelerometer APIs. It also describes steps for packaging the application as a Debian package and deploying it to the N900, including using an X86 emulator and the necessary packaging files and commands.
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![Debian packaging Create directory by name as appname-0.1 Edit *.pro file to add following lines target.path = /opt/maemo/usr/bin/ executable path on device INSTALLS += target added to generate Makefile with this path desktop.files = appname.desktop desktop.path = /opt/maemo/usr/share/applications/hildon INSTALLS += desktop qmake generate make files make compile the source code dh_make e [email_address] r s Creates all the required files for debian packaging in debian directory](https://image.slidesharecdn.com/nativeapplicationdevelopmentwithqt-091207193737-phpapp01/85/Native-Application-Development-With-Qt-11-320.jpg)
![Links http://wiki.maemo.org/Packaging_a_Qt_application http://qt4.garage.maemo.org http://qt.nokia.com http://doc.trolltech.com [email_address]](https://image.slidesharecdn.com/nativeapplicationdevelopmentwithqt-091207193737-phpapp01/85/Native-Application-Development-With-Qt-14-320.jpg)
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Native Application Development With Qt
- 1. Native application development with Qt Hands on development of Qt application Rahul Nimbalkar
- 2. Agenda Qt on desktop and maemo Qt Creator Developing Qt application for N900 Usage of accelerometer APIs for Qt application X86 usage for device emulator Debian packaging Deploying on N900 Links
- 3. Qt on desktop and maemo Qt油is a cross-platform application油and UI framework. Write applications油once and deploy across desktop, mobile and embedded OS without rewriting the source code Qt uses standard油C++, but makes extensive use of the C pre-processor to enrich the language Use of native UI-rendering APIs Meta object compiler Meta information is used to provide the signal/slot system
- 4. Qt on desktop and maemo Maemo is like any Linux distro Most of applications can be compiled to Maemo without any modifications Maemo is mobile optimized and Qt applications should be mobile optimized as well Maemo Qt4 port for adding maemo/hildon mobile optimizations to Qt
- 5. Qt Creator Qt Creator is a new cross-platform (IDE) An advanced C++ code editor Integrated油GUI layout and forms designer Project and build management tools Integrated, context-sensitive help system Visual debugger Rapid code navigation tools Supports油multiple platforms
- 6. Developing Qt application for N900 Developing Qt for device is similar to desktop application Qt Creator can be used for developing UI Signal/slots and basic coding can be done on desktop app Create device specific skeleton code Hildonized Menu for application
- 7. Accelerometer API for application MCE Mode Control Entity Fremantle provides an accelerometer API through two interfaces: D-Bus sysfs - /sys/class/i2c-adapter/i2c-3/3-001d/coord
- 9. Class Diagram meters 束inherits損 MCE 束signal/slots損 束Dbus/callback損 CAccelerometerNotifier QMainWindow Ui::meters centralwidget: QWidget*
- 10. X86 usage for device emulator Outside scratchbox execute Xephyr油:2 -host-cursor -screen 800x480x16 -dpi 96 -ac -kb & Create directory in scratchbox and copy desktop project to: /scratchbox/users/username/home/username/MyDocs/appname-0.1 Set up UI framework export DISPLAY=:2 af-sb-init.sh start Execute following commands qmake && make run-standalone ./appname
- 11. Debian packaging Create directory by name as appname-0.1 Edit *.pro file to add following lines target.path = /opt/maemo/usr/bin/ executable path on device INSTALLS += target added to generate Makefile with this path desktop.files = appname.desktop desktop.path = /opt/maemo/usr/share/applications/hildon INSTALLS += desktop qmake generate make files make compile the source code dh_make e [email_address] r s Creates all the required files for debian packaging in debian directory
- 12. Debian packaging Contd Edit debian/rules Add qmake-qt4 PREFIX=/opt/maemo/usr meters.pro in Make section Rename DEST_DIR to INSTALL_ROOT Edit debian/control Add maintainer name Add icons for application manager menu dpkg-buildpackage rfakeroot us uc Final step for creating debian package Package is created at one level up of current directory
- 13. Deploying on N900 Copy deb package to device Open Xterm on device Execute sudo gainroot Navigate to MyDocs dpkg i meters_0.1-1_armel.deb Launch Meters from More in main application menu
- 14. Links http://wiki.maemo.org/Packaging_a_Qt_application http://qt4.garage.maemo.org http://qt.nokia.com http://doc.trolltech.com [email_address]