Sets the callback function for a source. The callback for a source is
called from the source's dispatch function.
The exact type of func depends on the type of source; ie. you
should not count on func being called with data as its first
parameter. Cast func with G_SOURCE_FUNC() to avoid warnings about
incompatible function types.
See [memory management of sources][mainloop-memory-management] for details
on how to handle memory management of data.
It is safe to call this function multiple times on a source which has already
been attached to a context. The changes will take effect for the next time
the source is dispatched after this call returns.
Note that glib.source.Source.destroy for a currently attached source has the effect
of also unsetting the callback.
Sets the callback function for a source. The callback for a source is called from the source's dispatch function.
The exact type of func depends on the type of source; ie. you should not count on func being called with data as its first parameter. Cast func with G_SOURCE_FUNC() to avoid warnings about incompatible function types.
See [memory management of sources][mainloop-memory-management] for details on how to handle memory management of data.
Typically, you won't use this function. Instead use functions specific to the type of source you are using, such as glib.global.idleAdd or glib.global.timeoutAdd.
It is safe to call this function multiple times on a source which has already been attached to a context. The changes will take effect for the next time the source is dispatched after this call returns.
Note that glib.source.Source.destroy for a currently attached source has the effect of also unsetting the callback.