SignalGroup

gobject.signal_group.SignalGroup manages a collection of signals on a gobject.object.ObjectG.

gobject.signal_group.SignalGroup simplifies the process of connecting many signals to a gobject.object.ObjectG 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 gtk.text_view.TextView and gtk.text_buffer.TextBuffer. Often times, you'll need to connect to many signals on gtk.text_buffer.TextBuffer from a gtk.text_view.TextView subclass. This allows you to create a signal group during instance construction, simply bind the GtkTextView:buffer property to GSignalGroup:target and connect all the signals you need. When the GtkTextView:buffer property changes all of the signals will be transitioned correctly.

class SignalGroup : ObjectG {

this(gobject.types.GType targetType);

void block();

void connectClosure(string detailedSignal, gobject.closure.Closure closure, bool after);

gobject.object.ObjectG dupTarget();

void setTarget(gobject.object.ObjectG target);

void unblock();

ulong connectBind(T callback, Flag!"After" after);

ulong connectUnbind(T callback, Flag!"After" after);

}

Constructors

this this(gobject.types.GType targetType): Creates a new #GSignalGroup for target instances of target_type.

Members

Functions

block void block(): Blocks all signal handlers managed by self so they will not be called during any signal emissions. Must be unblocked exactly the same number of times it has been blocked to become active again.
connectBind ulong connectBind(T callback, Flag!"After" after): Connect to Bind signal.
connectClosure void connectClosure(string detailedSignal, gobject.closure.Closure closure, bool after): Connects closure to the signal detailed_signal on #GSignalGroup:target.
connectUnbind ulong connectUnbind(T callback, Flag!"After" after): Connect to Unbind signal.
dupTarget gobject.object.ObjectG dupTarget(): Gets the target instance used when connecting signals.
setTarget void setTarget(gobject.object.ObjectG target): Sets the target instance used when connecting signals. Any signal that has been registered with gobject.signal_group.SignalGroup.connectObject or similar functions will be connected to this object.
unblock void unblock(): Unblocks all signal handlers managed by self so they will be called again during any signal emissions unless it is blocked again. Must be unblocked exactly the same number of times it has been blocked to become active again.

Inherited Members

From ObjectG

setGObject void setGObject(void* cObj, Flag!"Take" take): Set the GObject of a D ObjectG wrapper.
cPtr void* cPtr(Flag!"Dup" dup): Get a pointer to the underlying C object.
ref_ void* ref_(void* gObj): Calls g_object_ref() on a GObject.
unref unref(void* gObj): Calls g_object_unref() on a GObject.
getType GType getType(): Get the GType of an object.
gType GType gType [@property getter]: GObject GType property.
self ObjectG self(): Convenience method to return this cast to a type. For use in D with statements.
getDObject T getDObject(void* cptr, Flag!"Take" take): Template to get the D object from a C GObject and cast it to the given D object type.
connectSignalClosure ulong connectSignalClosure(string signalDetail, DClosure closure, Flag!"After" after): Connect a D closure to an object signal.
setProperty void setProperty(string propertyName, T val): Template for setting a GObject property.
getProperty T getProperty(string propertyName): Template for getting a GObject property.
compatControl size_t compatControl(size_t what, void* data)
bindProperty gobject.binding.Binding bindProperty(string sourceProperty, gobject.object.ObjectG target, string targetProperty, gobject.types.BindingFlags flags): Creates a binding between source_property on source and target_property on target.
bindPropertyFull gobject.binding.Binding bindPropertyFull(string sourceProperty, gobject.object.ObjectG target, string targetProperty, gobject.types.BindingFlags flags, gobject.closure.Closure transformTo, gobject.closure.Closure transformFrom): Creates a binding between source_property on source and target_property on target, allowing you to set the transformation functions to be used by the binding.
forceFloating void forceFloating(): This function is intended for #GObject implementations to re-enforce a floating[floating-ref] object reference. Doing this is seldom required: all #GInitiallyUnowneds are created with a floating reference which usually just needs to be sunken by calling gobject.object.ObjectG.refSink.
freezeNotify void freezeNotify(): Increases the freeze count on object. If the freeze count is non-zero, the emission of "notify" signals on object is stopped. The signals are queued until the freeze count is decreased to zero. Duplicate notifications are squashed so that at most one #GObject::notify signal is emitted for each property modified while the object is frozen.
getData void* getData(string key): Gets a named field from the objects table of associations (see gobject.object.ObjectG.setData).
getProperty void getProperty(string propertyName, gobject.value.Value value): Gets a property of an object.
getQdata void* getQdata(glib.types.Quark quark): This function gets back user data pointers stored via gobject.object.ObjectG.setQdata.
getv void getv(string[] names, gobject.value.Value[] values): Gets n_properties properties for an object. Obtained properties will be set to values. All properties must be valid. Warnings will be emitted and undefined behaviour may result if invalid properties are passed in.
isFloating bool isFloating(): Checks whether object has a floating[floating-ref] reference.
notify void notify(string propertyName): Emits a "notify" signal for the property property_name on object.
notifyByPspec void notifyByPspec(gobject.param_spec.ParamSpec pspec): Emits a "notify" signal for the property specified by pspec on object.
refSink gobject.object.ObjectG refSink(): Increase the reference count of object, and possibly remove the floating[floating-ref] reference, if object has a floating reference.
runDispose void runDispose(): Releases all references to other objects. This can be used to break reference cycles.
setData void setData(string key, void* data): Each object carries around a table of associations from strings to pointers. This function lets you set an association.
setProperty void setProperty(string propertyName, gobject.value.Value value): Sets a property on an object.
stealData void* stealData(string key): Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
stealQdata void* stealQdata(glib.types.Quark quark): This function gets back user data pointers stored via gobject.object.ObjectG.setQdata and removes the data from object without invoking its destroy() function (if any was set). Usually, calling this function is only required to update user data pointers with a destroy notifier, for example:
thawNotify void thawNotify(): Reverts the effect of a previous call to gobject.object.ObjectG.freezeNotify. The freeze count is decreased on object and when it reaches zero, queued "notify" signals are emitted.
watchClosure void watchClosure(gobject.closure.Closure closure): This function essentially limits the life time of the closure to the life time of the object. That is, when the object is finalized, the closure is invalidated by calling gobject.closure.Closure.invalidate on it, in order to prevent invocations of the closure with a finalized (nonexisting) object. Also, gobject.object.ObjectG.ref_ and gobject.object.ObjectG.unref are added as marshal guards to the closure, to ensure that an extra reference count is held on object during invocation of the closure. Usually, this function will be called on closures that use this object as closure data.
connectNotify ulong connectNotify(string detail, T callback, Flag!"After" after): Connect to Notify signal.

gobject signal_group classes

SignalGroup