Sets our main struct and passes it to the parent class
the main Gtk struct as a void*
A marshaller for a GCClosure with a callback of type gboolean (*callback) (gpointer instance, gint arg1, gpointer user_data) where the gint parameter denotes a flags type.
A marshaller for a GCClosure with a callback of type gchar* (*callback) (gpointer instance, GObject *arg1, gpointer arg2, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gboolean arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, GBoxed *arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gchar arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gdouble arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gint arg1, gpointer user_data) where the gint parameter denotes an enumeration type..
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gint arg1, gpointer user_data) where the gint parameter denotes a flags type.
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gfloat arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gint arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, glong arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, GObject *arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, GParamSpec *arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gpointer arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, const gchar *arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, guchar arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, guint arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, guint arg1, gpointer arg2, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gulong arg1, gpointer user_data).
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, GVariant *arg1, gpointer user_data). Since 2.26
A marshaller for a GCClosure with a callback of type void (*callback) (gpointer instance, gpointer user_data).
Creates a new closure which invokes callback_func with user_data as the last parameter.
A variant of g_cclosure_new() which uses object as user_data and calls g_object_watch_closure() on object and the created closure. This function is useful when you have a callback closely associated with a GObject, and want the callback to no longer run after the object is is freed.
A variant of g_cclosure_new_swap() which uses object as user_data and calls g_object_watch_closure() on object and the created closure. This function is useful when you have a callback closely associated with a GObject, and want the callback to no longer run after the object is is freed.
Creates a new closure which invokes callback_func with user_data as the first parameter.
the main Gtk struct
Description A GClosure represents a callback supplied by the programmer. It will generally comprise a function of some kind and a marshaller used to call it. It is the reponsibility of the marshaller to convert the arguments for the invocation from GValues into a suitable form, perform the callback on the converted arguments, and transform the return value back into a GValue. In the case of C programs, a closure usually just holds a pointer to a function and maybe a data argument, and the marshaller converts between GValue and native C types. The GObject library provides the GCClosure type for this purpose. Bindings for other languages need marshallers which convert between GValues and suitable representations in the runtime of the language in order to use functions written in that languages as callbacks. Within GObject, closures play an important role in the implementation of signals. When a signal is registered, the c_marshaller argument to g_signal_new() specifies the default C marshaller for any closure which is connected to this signal. GObject provides a number of C marshallers for this purpose, see the g_cclosure_marshal_*() functions. Additional C marshallers can be generated with the glib-genmarshal utility. Closures can be explicitly connected to signals with g_signal_connect_closure(), but it usually more convenient to let GObject create a closure automatically by using one of the g_signal_connect_*() functions which take a callback function/user data pair. Using closures has a number of important advantages over a simple callback function/data pointer combination: Closures allow the callee to get the types of the callback parameters, which means that language bindings don't have to write individual glue for each callback type. The reference counting of GClosure makes it easy to handle reentrancy right; if a callback is removed while it is being invoked, the closure and its parameters won't be freed until the invocation finishes. g_closure_invalidate() and invalidation notifiers allow callbacks to be automatically removed when the objects they point to go away.