Getting Started With the Felix GUI¶
Felix comes with a library to create platform independent graphical user interfaces. It uses the Simple Direct Media Layer, version 2, SDL2 system with add-ons to do this.
SDL2 runs on Linux, OSX, Windows, iOS and Android and is designed for implementation of portable games.
For the Felix GUI to work, development versions of the following components must be installed:
SDL2 SDL2_image SDL2_ttf SDL2_gfx
On Linux using apt package manager do this:
sudo apt-get install libsdl2-dev sudo apt-get install libsdl2_image-dev sudo apt-get install libsdl2_ttf-dev sudo apt-get install libsdl2_gfx-dev
Felix already contains database entries for these packages, but at the time of writing this tutorial, the libraries are expected to be in /usr/local which is where you would put them if you built them yourself.
However Debian filesystem layout standards used by Linux OS such as Ubuntu that use apt package manager put components in /usr/ instead. So unfortunately you will have to modify the database by hand by editing these files
build/release/host/config/sdl2.fpc build/release/host/config/sdl2_image.fpc build/release/host/config/sdl2_ttf.fpc
replacing /usr/local with just /usr. To preserved these modifications across upgrades, you should also copy the files:
cp build/release/host/config/sdl2.fpc $HOME/.felix/config cp build/release/host/config/sdl2_image.fpc $HOME/.felix/config cp build/release/host/config/sdl2_ttf.fpc $HOME/.felix/config
I hope this problem can be reduced in future versions, but it is likely to be an issue for some time because most developers will have a libraries installed in both places, depending on whether they’re using a package manager to install them, or building from source.
To check your installation works, do this:
and a series of tests will run which use the Felix GUI and SDL2.