Rotate gesture. More...

#include <gtkmm/gesturerotate.h>

Inheritance diagram for Gtk::GestureRotate:

Public Member Functions
	GestureRotate (GestureRotate&& src) noexcept
GestureRotate&	operator= (GestureRotate&& src) noexcept
	~GestureRotate () noexceptoverride
GtkGestureRotate*	gobj ()
	Provides access to the underlying C GObject. More...
const GtkGestureRotate*	gobj () const
	Provides access to the underlying C GObject. More...
GtkGestureRotate*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
double	get_angle_delta () const
	If gesture is active, this function returns the angle difference in radians since the gesture was first recognized. More...
Glib::SignalProxy< void, double, double >	signal_angle_changed ()
Public Member Functions inherited from Gtk::Gesture
	Gesture (Gesture&& src) noexcept
Gesture&	operator= (Gesture&& src) noexcept
	~Gesture () noexceptoverride
GtkGesture*	gobj ()
	Provides access to the underlying C GObject. More...
const GtkGesture*	gobj () const
	Provides access to the underlying C GObject. More...
GtkGesture*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Glib::RefPtr< Gdk::Device >	get_device ()
	Returns the master Gdk::Device that is currently operating on gesture, or nullptr if the gesture is not being interacted. More...
Glib::RefPtr< const Gdk::Device >	get_device () const
	Returns the master Gdk::Device that is currently operating on gesture, or nullptr if the gesture is not being interacted. More...
bool	set_state (EventSequenceState state)
	Sets the state of all sequences that gesture is currently interacting with. More...
EventSequenceState	get_sequence_state (GdkEventSequence*sequence) const
	Returns the sequence state, as seen by gesture. More...
bool	set_sequence_state (GdkEventSequence*sequence, EventSequenceState state)
	Sets the state of sequence in gesture. More...
std::vector< const GdkEventSequence* >	get_sequences () const
	Returns the list of GdkEventSequences currently being interpreted. More...
GdkEventSequence*	get_last_updated_sequence ()
	Returns the Gdk::EventSequence that was last updated on gesture. More...
const GdkEventSequence*	get_last_updated_sequence () const
	Returns the Gdk::EventSequence that was last updated on gesture. More...
bool	handles_sequence (GdkEventSequence*sequence) const
	Returns true if gesture is currently handling events corresponding to sequence. More...
const GdkEvent*	get_last_event (GdkEventSequence*sequence) const
	Returns the last event that was processed for sequence. More...
bool	get_point (GdkEventSequence*sequence, double& x, double& y) const
	If sequence is currently being interpreted by gesture, this function returns true and fills in x and y with the last coordinates stored for that event sequence. More...
bool	get_bounding_box (Gdk::Rectangle& rect) const
	If there are touch sequences being currently handled by gesture, this function returns true and fills in rect with the bounding box containing all active touches. More...
bool	get_bounding_box_center (double& x, double& y) const
	If there are touch sequences being currently handled by gesture, this function returns true and fills in x and y with the center of the bounding box containing all active touches. More...
bool	is_active () const
	Returns true if the gesture is currently active. More...
bool	is_recognized () const
	Returns true if the gesture is currently recognized. More...
Glib::RefPtr< Gdk::Window >	get_window ()
	Returns the user-defined window that receives the events handled by gesture. More...
Glib::RefPtr< const Gdk::Window >	get_window () const
	Returns the user-defined window that receives the events handled by gesture. More...
void	set_window (const Glib::RefPtr< Gdk::Window >& window)
	Sets a specific window to receive events about, so gesture will effectively handle only events targeting window, or a child of it. More...
void	unset_window ()
	Undoes the effect of previous calls to set_window(), so the gesture will handle events targeting any Gdk::Window that pertains to Gtk::EventController::get_widget(). More...
void	group (const Glib::RefPtr< Gesture >& group_gesture)
	Adds gesture to the same group than group_gesture. More...
void	ungroup ()
	Separates gesture into an isolated group. More...
std::vector< Glib::RefPtr< Gesture > >	get_group ()
	Returns all gestures in the group of gesture. More...
std::vector< Glib::RefPtr< const Gesture > >	get_group () const
	Returns all gestures in the group of gesture. More...
bool	is_grouped_with (const Glib::RefPtr< Gesture >& other) const
	Returns true if both gestures pertain to the same group. More...
Glib::SignalProxy< void, GdkEventSequence* >	signal_begin ()
Glib::SignalProxy< void, GdkEventSequence* >	signal_end ()
Glib::SignalProxy< void, GdkEventSequence* >	signal_update ()
Glib::SignalProxy< void, GdkEventSequence* >	signal_cancel ()
Glib::SignalProxy< void, GdkEventSequence*, EventSequenceState >	signal_sequence_state_changed ()
Glib::PropertyProxy_ReadOnly< unsigned int >	property_n_points () const
	The number of touch points that trigger recognition on this gesture,. More...
Glib::PropertyProxy< Glib::RefPtr< Gdk::Window > >	property_window ()
	If non-nullptr, the gesture will only listen for events that happen on this Gdk::Window, or a child of it. More...
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gdk::Window > >	property_window () const
	If non-nullptr, the gesture will only listen for events that happen on this Gdk::Window, or a child of it. More...
Public Member Functions inherited from Gtk::EventController
	EventController (EventController&& src) noexcept
EventController&	operator= (EventController&& src) noexcept
	~EventController () noexceptoverride
GtkEventController*	gobj ()
	Provides access to the underlying C GObject. More...
const GtkEventController*	gobj () const
	Provides access to the underlying C GObject. More...
GtkEventController*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Widget*	get_widget ()
	Returns the Gtk::Widget this controller relates to. More...
const Widget*	get_widget () const
	Returns the Gtk::Widget this controller relates to. More...
bool	handle_event (const GdkEvent* event)
	Feeds an events into controller, so it can be interpreted and the controller actions triggered. More...
void	reset ()
	Resets the controller to a clean state. More...
PropagationPhase	get_propagation_phase () const
	Gets the propagation phase at which controller handles events. More...
void	set_propagation_phase (PropagationPhase phase)
	Sets the propagation phase at which a controller handles events. More...
Glib::PropertyProxy_ReadOnly< Widget* >	property_widget () const
	The widget receiving the Gdk::Events that the controller will handle. More...
Glib::PropertyProxy< PropagationPhase >	property_propagation_phase ()
	The propagation phase at which this controller will handle events. More...
Glib::PropertyProxy_ReadOnly< PropagationPhase >	property_propagation_phase () const
	The propagation phase at which this controller will handle events. More...
Public Member Functions inherited from Glib::Object
	Object (const Object &)=delete
Object &	operator= (const Object &)=delete
	Object (Object &&src) noexcept
Object &	operator= (Object &&src) noexcept
void *	get_data (const QueryQuark &key)
void	set_data (const Quark &key, void *data)
void	set_data (const Quark &key, void *data, DestroyNotify notify)
void	remove_data (const QueryQuark &quark)
void *	steal_data (const QueryQuark &quark)
Glib::RefPtr< Glib::Object >	wrap (GObject *object, bool take_copy=false)
Public Member Functions inherited from Glib::ObjectBase
	ObjectBase (const ObjectBase &)=delete
ObjectBase &	operator= (const ObjectBase &)=delete
void	set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value)
void	get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const
void	set_property (const Glib::ustring &property_name, const PropertyType &value)
void	get_property (const Glib::ustring &property_name, PropertyType &value) const
void	connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void > &slot)
void	connect_property_changed (const Glib::ustring &property_name, sigc::slot< void > &&slot)
sigc::connection	connect_property_changed_with_return (const Glib::ustring &property_name, const sigc::slot< void > &slot)
sigc::connection	connect_property_changed_with_return (const Glib::ustring &property_name, sigc::slot< void > &&slot)
void	freeze_notify ()
void	thaw_notify ()
virtual void	reference () const
virtual void	unreference () const
GObject *	gobj ()
const GObject *	gobj () const
GObject *	gobj_copy () const
Public Member Functions inherited from sigc::trackable
	trackable () noexcept
	trackable (const trackable &src) noexcept
	trackable (trackable &&src)
	~trackable ()
void	add_destroy_notify_callback (void *data, func_destroy_notify func) const
void	notify_callbacks ()
trackable &	operator= (const trackable &src)
trackable &	operator= (trackable &&src)
void	remove_destroy_notify_callback (void *data) const

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...
static Glib::RefPtr< GestureRotate >	create (Widget& widget)
	Creates a Gesture that recognizes 2-touch rotation gestures. More...
Static Public Member Functions inherited from Gtk::Gesture
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::EventController
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

Protected Member Functions
	GestureRotate ()
	There is no create() method that corresponds to this constructor, because this constructor shall only be used by derived classes. More...
	GestureRotate (Widget& widget)
	Constructs a Gesture that recognizes 2-touch rotation gestures. More...
Protected Member Functions inherited from Gtk::Gesture
	Gesture ()
	There is no create() method that corresponds to this constructor, because only derived classes shall be created. More...
Protected Member Functions inherited from Gtk::EventController
	EventController ()
	There is no create() method that corresponds to this constructor, because only derived classes shall be created. More...
Protected Member Functions inherited from Glib::Object
	Object ()
	Object (const Glib::ConstructParams &construct_params)
	Object (GObject *castitem)
	~Object () noexceptoverride
Protected Member Functions inherited from Glib::ObjectBase
	ObjectBase ()
	ObjectBase (const char *custom_type_name)
	ObjectBase (const std::type_info &custom_type_info)
	ObjectBase (ObjectBase &&src) noexcept
ObjectBase &	operator= (ObjectBase &&src) noexcept
virtual	~ObjectBase () noexcept=0
void	initialize (GObject *castitem)
void	initialize_move (GObject *castitem, Glib::ObjectBase *previous_wrapper)

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gtk::GestureRotate >	wrap (GtkGestureRotate* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::Gesture
Glib::RefPtr< Gtk::Gesture >	wrap (GtkGesture* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::EventController
Glib::RefPtr< Gtk::EventController >	wrap (GtkEventController* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Additional Inherited Members
Public Types inherited from Glib::Object
typedef void(*)(gpointer data	DestroyNotify)
Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify	func_destroy_notify

Detailed Description

Rotate gesture.

This is a Gesture implementation able to recognize 2-finger rotations. Whenever the angle between both handled sequences changes, signal_angle_changed() is emitted.

Since gtkmm 3.14:

Constructor & Destructor Documentation

Gtk::GestureRotate::GestureRotate ( GestureRotate&&  src )

noexcept

Gtk::GestureRotate::~GestureRotate ( )

overridenoexcept

Gtk::GestureRotate::GestureRotate ( )

protected

There is no create() method that corresponds to this constructor, because this constructor shall only be used by derived classes.

Gtk::GestureRotate::GestureRotate ( Widget&  widget )

explicitprotected

Constructs a Gesture that recognizes 2-touch rotation gestures.

Member Function Documentation

static Glib::RefPtr<GestureRotate> Gtk::GestureRotate::create ( Widget&  widget )

static

Creates a Gesture that recognizes 2-touch rotation gestures.

Since gtkmm 3.14:

Parameters

widget

Widget the gesture relates to.

Returns

A RefPtr to a new GestureRotate.

double Gtk::GestureRotate::get_angle_delta

(

)

const

If gesture is active, this function returns the angle difference in radians since the gesture was first recognized.

If gesture is not active, 0 is returned.

Since gtkmm 3.14:

Returns

The angle delta in radians.

static GType Gtk::GestureRotate::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

GtkGestureRotate* Gtk::GestureRotate::gobj ( )

inline

Provides access to the underlying C GObject.

const GtkGestureRotate* Gtk::GestureRotate::gobj ( ) const

inline

Provides access to the underlying C GObject.

GtkGestureRotate* Gtk::GestureRotate::gobj_copy

(

)

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

GestureRotate& Gtk::GestureRotate::operator= ( GestureRotate&&  src )

noexcept

Glib::SignalProxy< void,double,double > Gtk::GestureRotate::signal_angle_changed

(

)

Slot Prototype:

void on_my_angle_changed(double angle, double angle_delta)

This signal is emitted when the angle between both tracked points changes.

Since gtkmm 3.14:

Parameters

angle	Current angle in radians.
angle_delta	Difference with the starting angle, in radians.

Friends And Related Function Documentation

Glib::RefPtr< Gtk::GestureRotate > wrap ( GtkGestureRotate *  object, bool  take_copy = false  )

related

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns

A C++ instance that wraps this C instance.