A predefined GSignalAccumulator for signals intended to be used as a hook for application code to provide a particular value. Usually only one such value is desired and multiple handlers for the same signal don't make much sense (except for the case of the default handler defined in the class structure, in which case you will usually want the signal connection to override the class handler).
A predefined GSignalAccumulator for signals that return a boolean values. The behavior that this accumulator gives is that a return of TRUE stops the signal emission: no further callbacks will be invoked, while a return of FALSE allows the emission to continue. The idea here is that a TRUE return indicates that the callback handled the signal, and no further handling is needed.
Adds an emission hook for a signal, which will get called for any emission of that signal, independent of the instance. This is possible only for signals which don't have G_SIGNAL_NO_HOOKS flag set.
Calls the original class closure of a signal. This function should only be called from an overridden class closure; see g_signal_override_class_closure() and g_signal_override_class_handler().
Disconnects a handler from instance so it will not be called during any future or currently ongoing emissions of the signal it has been connected to. The handler_id_ptr is then set to zero, which is never a valid handler ID value (see g_signal_connect()).
Connects a callback to a signal for a particular object.
Connects a GCallback function to a signal for a particular object.
Connects a closure to a signal for a particular object.
Connects a closure to a signal for a particular object.
Connects a GCallback function to a signal for a particular object. Similar to g_signal_connect(), but allows to provide a GClosureNotify for the data which will be called when the signal handler is disconnected and no longer used. Specify connect_flags if you need ..._after()` or ..._swapped()` variants of this function.
This is similar to g_signal_connect_data(), but uses a closure which ensures that the gobject stays alive during the call to c_handler by temporarily adding a reference count to gobject.
Emits a signal.
Emits a signal.
Returns the invocation hint of the innermost signal emission of instance.
Blocks a handler of an instance so it will not be called during any signal emissions unless it is unblocked again. Thus "blocking" a signal handler means to temporarily deactive it, a signal handler has to be unblocked exactly the same amount of times it has been blocked before to become active again.
Disconnects a handler from an instance so it will not be called during any future or currently ongoing emissions of the signal it has been connected to. The handler_id becomes invalid and may be reused.
Finds the first signal handler that matches certain selection criteria. The criteria mask is passed as an OR-ed combination of GSignalMatchType flags, and the criteria values are passed as arguments. The match mask has to be non-0 for successful matches. If no handler was found, 0 is returned.
Returns whether handler_id is the ID of a handler connected to instance.
Undoes the effect of a previous g_signal_handler_block() call. A blocked handler is skipped during signal emissions and will not be invoked, unblocking it (for exactly the amount of times it has been blocked before) reverts its "blocked" state, so the handler will be recognized by the signal system and is called upon future or currently ongoing signal emissions (since the order in which handlers are called during signal emissions is deterministic, whether the unblocked handler in question is called as part of a currently ongoing emission depends on how far that emission has proceeded yet).
Blocks all handlers on an instance that match a certain selection criteria. The criteria mask is passed as an OR-ed combination of GSignalMatchType flags, and the criteria values are passed as arguments. Passing at least one of the G_SIGNAL_MATCH_CLOSURE, G_SIGNAL_MATCH_FUNC or G_SIGNAL_MATCH_DATA match flags is required for successful matches. If no handlers were found, 0 is returned, the number of blocked handlers otherwise.
Destroy all signal handlers of a type instance. This function is an implementation detail of the GObject dispose implementation, and should not be used outside of the type system.
Disconnects all handlers on an instance that match a certain selection criteria. The criteria mask is passed as an OR-ed combination of GSignalMatchType flags, and the criteria values are passed as arguments. Passing at least one of the G_SIGNAL_MATCH_CLOSURE, G_SIGNAL_MATCH_FUNC or G_SIGNAL_MATCH_DATA match flags is required for successful matches. If no handlers were found, 0 is returned, the number of disconnected handlers otherwise.
Unblocks all handlers on an instance that match a certain selection criteria. The criteria mask is passed as an OR-ed combination of GSignalMatchType flags, and the criteria values are passed as arguments. Passing at least one of the G_SIGNAL_MATCH_CLOSURE, G_SIGNAL_MATCH_FUNC or G_SIGNAL_MATCH_DATA match flags is required for successful matches. If no handlers were found, 0 is returned, the number of unblocked handlers otherwise. The match criteria should not apply to any handlers that are not currently blocked.
Returns whether there are any handlers connected to instance for the given signal id and detail.
Lists the signals by id that a certain instance or interface type created. Further information about the signals can be acquired through g_signal_query().
Given the name of the signal and the type of object it connects to, gets the signal's identifying integer. Emitting the signal by number is somewhat faster than using the name each time.
Given the signal's identifier, finds its name.
Creates a new signal. (This is usually done in the class initializer.)
Creates a new signal. (This is usually done in the class initializer.)
Overrides the class closure (i.e. the default handler) for the given signal for emissions on instances of instance_type. instance_type must be derived from the type to which the signal belongs.
Overrides the class closure (i.e. the default handler) for the given signal for emissions on instances of instance_type with callback class_handler. instance_type must be derived from the type to which the signal belongs.
Internal function to parse a signal name into its signal_id and detail quark.
Queries the signal system for in-depth information about a specific signal. This function will fill in a user-provided structure to hold signal-specific information. If an invalid signal id is passed in, the signal_id member of the GSignalQuery is 0. All members filled into the GSignalQuery structure should be considered constant and have to be left untouched.
Deletes an emission hook.
Change the GSignalCVaMarshaller used for a given signal. This is a specialised form of the marshaller that can often be used for the common case of a single connected signal handler and avoids the overhead of gobject.Value Its use is optional.
Stops a signal's current emission.
Stops a signal's current emission.
Creates a new closure which invokes the function found at the offset struct_offset in the class structure of the interface or classed type identified by itype.