SignalEmissionHook

A simple function pointer to get invoked when the signal is emitted.

Emission hooks allow you to tie a hook to the signal type, so that it will trap all emissions of that signal, from any object.

You may not attach these to signals created with the %G_SIGNAL_NO_HOOKS flag.

• param ihint Signal invocation hint, see #GSignalInvocationHint.

• param nParamValues the number of parameters to the function, including the instance on which the signal was emitted.

• param data user data associated with the hook.

• return whether it wants to stay connected. If it returns false, the signal hook is disconnected (and destroyed).