pub fn init() -> Result<(), BoolError>Expand description
Tries to initialize GTK.
Call either this function or Application::new before using any
other GTK functions.
Note that this function calls gtk_init_check() rather than gtk_init(),
so will not cause the program to terminate if GTK could not be initialized.
Instead, an Ok is returned if the windowing system was successfully
initialized otherwise an Err is returned.