Platform dependent code includes system calls, calls to the underlying window system (Windows or X11), and Qt platform specific methods such as QApplication::x11EventFilter(). For cases where it is necessary to use platform dependent code there are macros defined that can be used to enable and disable code for each platform using #ifdef directives:
- Qt for Embedded Linux: Q_WS_QWS
- Qt for Mac OS X: Q_WS_MAC
- Qt for Windows: Q_WS_WIN
- Qt for X11: Q_WS_X11
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