SignalGroup

Object Hierarchy:

Description:

[ CCode ( type_id = "G_TYPE_SIGNAL_GROUP" ) ]
[ Version ( since = "2.72" ) ]
public class SignalGroup : Object

SignalGroup manages to simplify the process of connecting many signals to a Object as a group.

As such there is no API to disconnect a signal from the group.

In particular, this allows you to:

Change the target instance, which automatically causes disconnection of the signals from the old instance and connecting to the new instance.
Block and unblock signals as a group
Ensuring that blocked state transfers across target instances.

One place you might want to use such a structure is with GtkTextView and GtkTextBuffer. Often times, you'll need to connect to many signals on GtkTextBuffer from a GtkTextView subclass. This allows you to create a signal group during instance construction, simply bind the GtkTextView:buffer property to target and connect all the signals you need. When the GtkTextView:buffer property changes all of the signals will be transitioned correctly.

Namespace: GLib

Package: gobject-2.0

Content:

Properties:

public Object target { owned get; set; }
The target instance used when connecting signals.
public Type target_type { get; construct; }
The Type of the target property.

Creation methods:

public SignalGroup (Type target_type)
Creates a new SignalGroup for target instances of target_type.

Methods:

public void block ()
Blocks all signal handlers managed by this so they will not be called during any signal emissions.
public void connect (string detailed_signal, Callback c_handler, void* data)
Connects c_handler to the signal detailed_signal on the target instance of this.
public void connect_after (string detailed_signal, Callback c_handler, void* data)
Connects c_handler to the signal detailed_signal on the target instance of this.
public void connect_data (string detailed_signal, Callback c_handler, void* data, ClosureNotify notify, ConnectFlags flags)
Connects c_handler to the signal detailed_signal on the target instance of this.
public void connect_object (string detailed_signal, Callback c_handler, void* object, ConnectFlags flags)
Connects c_handler to the signal detailed_signal on target.
public void connect_swapped (string detailed_signal, Callback c_handler, void* data)
Connects c_handler to the signal detailed_signal on the target instance of this.
public Object? dup_target ()
Gets the target instance used when connecting signals.
public void set_target (Object? target)
Sets the target instance used when connecting signals.
public void unblock ()
Unblocks all signal handlers managed by this so they will be called again during any signal emissions unless it is blocked again.

Signals:

public signal void bind (Object instance)
This signal is emitted when target is set to a new value other than null.
public signal void unbind ()
This signal is emitted when the target instance of self is set to a new Object.

Inherited Members:

All known members inherited from class GLib.Object