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Summary
Here is a summary of the entire process described in the preceding five sections, for creating an installable application.- Create at least one user interface element (
FrmMain.cppin the example) - Create the
main()method to instantiate the user interface element and the application - Run the MOC on all the header files that define user interface elements
- Compile all the C++ files
- Link with the Qtopia and Qt-embedded libraries, and their dependencies
- Strip the executable to reduce its size
- Create a .desktop file to control the Qtopia launcher
- Create and compress a control file
- Create an icon
- Create a
debian-binaryfile - Put the .desktop file, icon, and stripped executable into a directory
structure that reflects the locations of these files on the target
device. Compress this directory into
data.tar.gz - Compress the
debian-binaryfile, compressed control file, anddata.tar.gzinto a single package file
Comments
If you're new to Qtopia development, this probably all seems very complicated for a `Hello, World!' application. However, it is important to realize that this complexity -- the complexity of compiling and packaging the application -- never gets any worse than this. Or, at least, it doesn't get any worse until you start dealing with multi-platform distribution, which is a whole new ballgame.What's more, all the preceding steps can be put into a shell script or Makefile, and executed with a single command. Note also that all the tools we've used in this exercise are available free-of-charge, and most are open source. It is possible to buy smart graphical tools for building Qtopia applications (from Metrowerks, for example), but I hope it should be obvious that these tools are a luxury -- you can build perfectly useable applications without them.
Where to go from here
Here are some suggestions for learning more about Qtopia and Qt-embedded.- There is lots of general information about Qtopia and Qt-embedded on Trolltech's FAQ pages
- If you have installed the Qtopia libraries, you'll find very
comprehensive documentation in HTML format. Point your browser at
/opt/Qtopia/doc/index.html - Have a look at the source code for Qtopia, especially the built-in applications like the addressbook. More-or-less the whole of the Qt/Qtopia class library is demonstrated there.
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