# Qt5 module
The Qt5 module provides tools to automatically deal with the various
tools and steps required for Qt. The module has two methods.
## preprocess
This method takes the following keyword arguments:
- `moc_headers` , `moc_sources` , `ui_files` , `qresources` , which define the files that require preprocessing with `moc` , `uic` and `rcc`
- `include_directories` , the directories to add to header search path for `moc` (optional)
- `moc_extra_arguments` , any additional arguments to `moc` (optional). Available since v0.44.0.
It returns an opaque object that should be passed to a main build target.
## compile_translations (since v0.44.0)
This method generates the necessary targets to build translation files with lrelease, it takes the following keyword arguments:
- `ts_files` , the list of input translation files produced by Qt's lupdate tool.
- `install` when true, this target is installed during the install step (optional).
- `install_dir` directory to install to (optional).
- `build_by_default` when set to true, to have this target be built by default, that is, when invoking plain ninja; the default value is false (optional).
A simple example would look like this:
```meson
qt5 = import('qt5')
qt5_dep = dependency('qt5', modules: ['Core', 'Gui'])
inc = include_directories('includes')
moc_files = qt5.preprocess(moc_headers : 'myclass.h',
moc_extra_arguments: ['-DMAKES_MY_MOC_HEADER_COMPILE'],
include_directories: inc)
translations = qt5.compile_translations(ts_files : 'myTranslation_fr.ts', build_by_default : true)
executable('myprog', 'main.cpp', 'myclass.cpp', moc_files,
include_directories: inc,
dependencies : qt5_dep)
```
The 'modules' argument is used to include Qt modules in the project.
See the Qt documentation for the [list of modules ](http://doc.qt.io/qt-5/qtmodules.html ).
