gtkmm: Gdk::Display Class Reference

Gdk::Display object's purpose is two fold: To grab/ungrab keyboard focus and mouse pointer To manage and provide information about the Gdk::Screen(s) available for this Gdk::Display. More...

#include <gdkmm/display.h>

Inheritance diagram for Gdk::Display:

[legend]

Public Member Functions
	Display (Display&& src) noexcept

Display&	operator= (Display&& src) noexcept

	~Display () noexceptoverride

GdkDisplay*	gobj ()
	Provides access to the underlying C GObject. More...

const GdkDisplay*	gobj () const
	Provides access to the underlying C GObject. More...

GdkDisplay*	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::ustring	get_name () const
	Gets the name of the display. More...

int	get_n_screens () const
	Gets the number of screen managed by the display. More...

Glib::RefPtr< Screen >	get_screen (int screen_num=0)
	Returns a screen object for one of the screens of the display. More...

Glib::RefPtr< const Screen >	get_screen (int screen_num=0) const
	Returns a screen object for one of the screens of the display. More...

Glib::RefPtr< Screen >	get_default_screen ()
	Get the default Gdk::Screen for display. More...

Glib::RefPtr< const Screen >	get_default_screen () const
	Get the default Gdk::Screen for display. More...

bool	device_is_grabbed (const Glib::RefPtr< const Gdk::Device >& device) const
	Returns `true` if there is an ongoing grab on device for display. More...

void	beep ()
	Emits a short beep on display. More...

void	sync ()
	Flushes any requests queued for the windowing system and waits until all requests have been handled. More...

void	close ()
	Closes the connection to the windowing system for the given display, and cleans up associated resources. More...

bool	is_closed () const
	Finds out if the display has been closed. More...

GdkEvent*	get_event ()
	Gets the next Gdk::Event to be processed for display, fetching events from the windowing system if necessary. More...

const GdkEvent*	get_event () const
	Gets the next Gdk::Event to be processed for display, fetching events from the windowing system if necessary. More...

GdkEvent*	peek_event ()
	Gets a copy of the first Gdk::Event in the display’s event queue, without removing the event from the queue. More...

GdkEvent*	peek_event () const
	Gets a copy of the first Gdk::Event in the display’s event queue, without removing the event from the queue. More...

void	put_event (GdkEvent* event)
	Appends a copy of the given event onto the front of the event queue for display. More...

bool	has_pending () const
	Returns whether the display has events that are waiting to be processed. More...

void	set_double_click_time (guint msec)
	Sets the double click time (two clicks within this time interval count as a double click and result in a Gdk::2BUTTON_PRESS event). More...

void	set_double_click_distance (guint distance)
	Sets the double click distance (two clicks within this distance count as a double click and result in a Gdk::2BUTTON_PRESS event). More...

GdkKeymap*	get_keymap ()
	Returns the Gdk::Keymap attached to display. More...

const GdkKeymap*	get_keymap () const
	Returns the Gdk::Keymap attached to display. More...

bool	set_selection_owner (const Glib::RefPtr< Window >& owner, Glib::ustring& selection, guint32 time_, bool send_event)

Glib::RefPtr< Window >	get_selection_owner (const Glib::ustring& selection)

void	selection_send_notify (const Glib::RefPtr< Window >& requestor, Glib::ustring& selection, Glib::ustring& target, Glib::ustring& property, guint32 time_)
	Send a response to SelectionRequest event. More...

void	flush ()
	Flushes any requests queued for the windowing system; this happens automatically when the main loop blocks waiting for new events, but if your application is drawing without returning control to the main loop, you may need to call this function explicitly. More...

bool	supports_cursor_alpha () const
	Returns `true` if cursors can use an 8bit alpha channel on display. More...

bool	supports_cursor_color () const
	Returns `true` if multicolored cursors are supported on display. More...

guint	get_default_cursor_size () const
	Returns the default size to use for cursors on display. More...

void	get_maximal_cursor_size (guint& width, guint& height)
	Gets the maximal size to use for cursors on display. More...

Glib::RefPtr< Window >	get_default_group ()
	Returns the default group leader window for all toplevel windows on display. More...

Glib::RefPtr< const Window >	get_default_group () const
	Returns the default group leader window for all toplevel windows on display. More...

bool	supports_selection_notification () const
	Returns whether Gdk::EventOwnerChange events will be sent when the owner of a selection changes. More...

bool	request_selection_notification (const Glib::ustring& selection)
	Request Gdk::EventOwnerChange events for ownership changes of the selection named by the given atom. More...

bool	supports_clipboard_persistence () const
	Returns whether the speicifed display supports clipboard persistance; i.e. if it’s possible to store the clipboard data after an application has quit. More...

void	store_clipboard (const Glib::RefPtr< Gdk::Window >& clipboard_window, guint32 time_)
	Issues a request to the clipboard manager to store the clipboard data, saving all available targets. More...

void	store_clipboard (const Glib::RefPtr< Gdk::Window >& clipboard_window, guint32 time_, const std::vector< Glib::ustring >& targets)

bool	supports_shapes () const
	Returns `true` if gdk_window_shape_combine_mask() can be used to create shaped windows on display. More...

bool	supports_input_shapes () const
	Returns `true` if gdk_window_input_shape_combine_mask() can be used to modify the input shape of windows on display. More...

bool	supports_composite () const
	Returns `true` if Gdk::Window::set_composited() can be used to redirect drawing on the window using compositing. More...

void	notify_startup_complete (const Glib::ustring& startup_id)
	Indicates to the GUI environment that the application has finished loading, using a given identifier. More...

Glib::RefPtr< DeviceManager >	get_device_manager ()
	Returns the Gdk::DeviceManager associated to display. More...

Glib::RefPtr< const DeviceManager >	get_device_manager () const
	Returns the Gdk::DeviceManager associated to display. More...

Glib::RefPtr< AppLaunchContext >	get_app_launch_context ()
	Returns a Gdk::AppLaunchContext suitable for launching applications on the given display. More...

Glib::RefPtr< const AppLaunchContext >	get_app_launch_context () const
	Returns a Gdk::AppLaunchContext suitable for launching applications on the given display. More...

Glib::RefPtr< Seat >	get_default_seat ()
	Returns the default Gdk::Seat for this display. More...

Glib::RefPtr< const Seat >	get_default_seat () const
	Returns the default Gdk::Seat for this display. More...

std::vector< Glib::RefPtr< Seat > >	list_seats ()
	Returns the list of seats known to display. More...

std::vector< Glib::RefPtr< const Seat > >	list_seats () const
	Returns the list of seats known to display. More...

int	get_n_monitors () const
	Gets the number of monitors that belong to display. More...

Glib::RefPtr< Monitor >	get_monitor (int monitor_num)
	Gets a monitor associated with this display. More...

Glib::RefPtr< const Monitor >	get_monitor (int monitor_num) const
	Gets a monitor associated with this display. More...

Glib::RefPtr< Monitor >	get_primary_monitor ()
	Gets the primary monitor for the display. More...

Glib::RefPtr< const Monitor >	get_primary_monitor () const
	Gets the primary monitor for the display. More...

Glib::RefPtr< Monitor >	get_monitor_at_point (int x, int y)
	Gets the monitor in which the point ( x, y) is located, or a nearby monitor if the point is not in any monitor. More...

Glib::RefPtr< const Monitor >	get_monitor_at_point (int x, int y) const
	Gets the monitor in which the point ( x, y) is located, or a nearby monitor if the point is not in any monitor. More...

Glib::RefPtr< Monitor >	get_monitor_at_window (const Glib::RefPtr< Window >& window)
	Gets the monitor in which the largest area of window resides, or a monitor close to window if it is outside of all monitors. More...

Glib::RefPtr< const Monitor >	get_monitor_at_window (const Glib::RefPtr< Window >& window) const
	Gets the monitor in which the largest area of window resides, or a monitor close to window if it is outside of all monitors. More...

Glib::SignalProxy< void, bool >	signal_closed ()

Glib::SignalProxy< void >	signal_opened ()

Glib::SignalProxy< void, const Glib::RefPtr< Seat >& >	signal_seat_added ()

Glib::SignalProxy< void, const Glib::RefPtr< Seat >& >	signal_seat_removed ()

Glib::SignalProxy< void, const Glib::RefPtr< Monitor >& >	signal_monitor_added ()

Glib::SignalProxy< void, const Glib::RefPtr< Monitor >& >	signal_monitor_removed ()

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< Display >	open (const Glib::ustring& display_name)
	Opens a display. More...

static Glib::RefPtr< Display >	get_default ()
	Gets the default Gdk::Display. More...

static Glib::RefPtr< Display >	open_default_libgtk_only ()
	Opens the default display specified by command line arguments or environment variables, sets it as the default display, and returns it. More...

Protected Member Functions
	Display ()

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< Gdk::Display >	wrap (GdkDisplay* 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

Gdk::Display object's purpose is two fold: To grab/ungrab keyboard focus and mouse pointer To manage and provide information about the Gdk::Screen(s) available for this Gdk::Display.

Gdk::Display objects are the GDK representation of the X Display which can be described as a workstation consisting of a keyboard a pointing device (such as a mouse) and one or more screens. It is used to open and keep track of various Gdk::Screen objects currently instantiated by the application. It is also used to grab and release the keyboard and the mouse pointer.

Constructor & Destructor Documentation

Gdk::Display::Display ( Display&& src )

noexcept

Gdk::Display::~Display ( )

overridenoexcept

Gdk::Display::Display ( )

protected

Member Function Documentation

void Gdk::Display::beep ( )

Emits a short beep on display.

Since gtkmm 2.2:

void Gdk::Display::close ( )

Closes the connection to the windowing system for the given display, and cleans up associated resources.

Since gtkmm 2.2:

bool Gdk::Display::device_is_grabbed ( const Glib::RefPtr< const Gdk::Device >& device ) const

Returns true if there is an ongoing grab on device for display.

Parameters

device A Gdk::Device.

Returns: true if there is a grab in effect for device.

void Gdk::Display::flush ( )

Flushes any requests queued for the windowing system; this happens automatically when the main loop blocks waiting for new events, but if your application is drawing without returning control to the main loop, you may need to call this function explicitly.

A common case where this function needs to be called is when an application is executing drawing commands from a thread other than the thread where the main loop is running.

This is most useful for X11. On windowing systems where requests are handled synchronously, this function will do nothing.

Since gtkmm 2.4:

Glib::RefPtr<AppLaunchContext> Gdk::Display::get_app_launch_context ( )

Returns a Gdk::AppLaunchContext suitable for launching applications on the given display.

Since gtkmm 3.0:

Returns: A new Gdk::AppLaunchContext for display. Free with Glib::object_unref() when done.

Glib::RefPtr<const AppLaunchContext> Gdk::Display::get_app_launch_context ( ) const

Returns a Gdk::AppLaunchContext suitable for launching applications on the given display.

Since gtkmm 3.0:

Returns: A new Gdk::AppLaunchContext for display. Free with Glib::object_unref() when done.

static Glib::RefPtr<Display> Gdk::Display::get_default ( )

static

Gets the default Gdk::Display.

This is a convenience function for: gdk_display_manager_get_default_display (Gdk::DisplayManager::get()).

Since gtkmm 2.2:

Returns: A Gdk::Display, or nullptr if there is no default display.

guint Gdk::Display::get_default_cursor_size ( ) const

Returns the default size to use for cursors on display.

Since gtkmm 2.4:

Returns: The default cursor size.

Glib::RefPtr<Window> Gdk::Display::get_default_group ( )

Returns the default group leader window for all toplevel windows on display.

This window is implicitly created by GDK. See Gdk::Window::set_group().

Since gtkmm 2.4:

Returns: The default group leader window for display.

Glib::RefPtr<const Window> Gdk::Display::get_default_group ( ) const

Returns the default group leader window for all toplevel windows on display.

This window is implicitly created by GDK. See Gdk::Window::set_group().

Since gtkmm 2.4:

Returns: The default group leader window for display.

Glib::RefPtr<Screen> Gdk::Display::get_default_screen ( )

Get the default Gdk::Screen for display.

Since gtkmm 2.2:

Returns: The default Gdk::Screen object for display.

Glib::RefPtr<const Screen> Gdk::Display::get_default_screen ( ) const

Get the default Gdk::Screen for display.

Since gtkmm 2.2:

Returns: The default Gdk::Screen object for display.

Glib::RefPtr<Seat> Gdk::Display::get_default_seat ( )

Returns the default Gdk::Seat for this display.

Since gtkmm 3.20:

Returns: The default seat.

Glib::RefPtr<const Seat> Gdk::Display::get_default_seat ( ) const

Returns the default Gdk::Seat for this display.

Since gtkmm 3.20:

Returns: The default seat.

Glib::RefPtr<DeviceManager> Gdk::Display::get_device_manager ( )

Returns the Gdk::DeviceManager associated to display.

Since gtkmm 3.0:

Deprecated: 3.20. Use get_default_seat() and Gdk::Seat operations.

Deprecated:: Use get_default_seat() and Gdk::Seat operations.

Returns: A Gdk::DeviceManager, or nullptr. This memory is owned by GDK and must not be freed or unreferenced.

Glib::RefPtr<const DeviceManager> Gdk::Display::get_device_manager ( ) const

Returns the Gdk::DeviceManager associated to display.

Since gtkmm 3.0:

Deprecated: 3.20. Use get_default_seat() and Gdk::Seat operations.

Deprecated:: Use get_default_seat() and Gdk::Seat operations.

Returns: A Gdk::DeviceManager, or nullptr. This memory is owned by GDK and must not be freed or unreferenced.

GdkEvent* Gdk::Display::get_event ( )

Gets the next Gdk::Event to be processed for display, fetching events from the windowing system if necessary.

Since gtkmm 2.2:

Returns: The next Gdk::Event to be processed, or nullptr if no events are pending. The returned Gdk::Event should be freed with Gdk::Event::free().

const GdkEvent* Gdk::Display::get_event ( ) const

Gets the next Gdk::Event to be processed for display, fetching events from the windowing system if necessary.

Since gtkmm 2.2:

Returns: The next Gdk::Event to be processed, or nullptr if no events are pending. The returned Gdk::Event should be freed with Gdk::Event::free().

GdkKeymap* Gdk::Display::get_keymap ( )

Returns the Gdk::Keymap attached to display.

Since gtkmm 2.2:

Returns: The Gdk::Keymap attached to display.

const GdkKeymap* Gdk::Display::get_keymap ( ) const

Returns the Gdk::Keymap attached to display.

Since gtkmm 2.2:

Returns: The Gdk::Keymap attached to display.

void Gdk::Display::get_maximal_cursor_size	(	guint &	width,
		guint &	height
	)

Gets the maximal size to use for cursors on display.

Since gtkmm 2.4:

Parameters

width	The return location for the maximal cursor width.
height	The return location for the maximal cursor height.

Glib::RefPtr<Monitor> Gdk::Display::get_monitor ( int monitor_num )

Gets a monitor associated with this display.

Since gtkmm 3.22:

Parameters

monitor_num Number of the monitor.

Returns: The Gdk::Monitor, or nullptr if monitor_num is not a valid monitor number.

Glib::RefPtr<const Monitor> Gdk::Display::get_monitor ( int monitor_num ) const

Gets a monitor associated with this display.

Since gtkmm 3.22:

Parameters

monitor_num Number of the monitor.

Returns: The Gdk::Monitor, or nullptr if monitor_num is not a valid monitor number.

Glib::RefPtr<Monitor> Gdk::Display::get_monitor_at_point	(	int	x,
		int	y
	)

Gets the monitor in which the point ( x, y) is located, or a nearby monitor if the point is not in any monitor.

Since gtkmm 3.22:

Parameters

x	The x coordinate of the point.
y	The y coordinate of the point.

Returns: The monitor containing the point.

Glib::RefPtr<const Monitor> Gdk::Display::get_monitor_at_point	(	int	x,
		int	y
	)		const

Gets the monitor in which the point ( x, y) is located, or a nearby monitor if the point is not in any monitor.

Since gtkmm 3.22:

Parameters

x	The x coordinate of the point.
y	The y coordinate of the point.

Returns: The monitor containing the point.

Glib::RefPtr<Monitor> Gdk::Display::get_monitor_at_window ( const Glib::RefPtr< Window >& window )

Gets the monitor in which the largest area of window resides, or a monitor close to window if it is outside of all monitors.

Since gtkmm 3.22:

Parameters

window A Gdk::Window.

Returns: The monitor with the largest overlap with window.

Glib::RefPtr<const Monitor> Gdk::Display::get_monitor_at_window ( const Glib::RefPtr< Window >& window ) const

Gets the monitor in which the largest area of window resides, or a monitor close to window if it is outside of all monitors.

Since gtkmm 3.22:

Parameters

window A Gdk::Window.

Returns: The monitor with the largest overlap with window.

int Gdk::Display::get_n_monitors ( ) const

Gets the number of monitors that belong to display.

The returned number is valid until the next emission of the Gdk::Display::signal_monitor_added() or Gdk::Display::signal_monitor_removed() signal.

Since gtkmm 3.22:

Returns: The number of monitors.

int Gdk::Display::get_n_screens ( ) const

Gets the number of screen managed by the display.

Since gtkmm 2.2:

Deprecated: 3.10: The number of screens is always 1.

Deprecated:: The number of screens is always 1.

Returns: Number of screens.

Glib::ustring Gdk::Display::get_name ( ) const

Gets the name of the display.

Since gtkmm 2.2:

Returns: A string representing the display name. This string is owned by GDK and should not be modified or freed.

Glib::RefPtr<Monitor> Gdk::Display::get_primary_monitor ( )

Gets the primary monitor for the display.

The primary monitor is considered the monitor where the “main desktop” lives. While normal application windows typically allow the window manager to place the windows, specialized desktop applications such as panels should place themselves on the primary monitor.

Since gtkmm 3.22:

Returns: The primary monitor, or nullptr if no primary monitor is configured by the user.

Glib::RefPtr<const Monitor> Gdk::Display::get_primary_monitor ( ) const

Gets the primary monitor for the display.

Since gtkmm 3.22:

Returns: The primary monitor, or nullptr if no primary monitor is configured by the user.

Glib::RefPtr<Screen> Gdk::Display::get_screen ( int screen_num = 0 )

Returns a screen object for one of the screens of the display.

Since gtkmm 2.2:: Deprecated: 3.20: There is only one screen; use get_default_screen() to get it.

Deprecated:: There is only one screen; use get_default_screen() to get it.

Parameters

screen_num The screen number.

Returns: The Gdk::Screen object.

Glib::RefPtr<const Screen> Gdk::Display::get_screen ( int screen_num = 0 ) const

Returns a screen object for one of the screens of the display.

Since gtkmm 2.2:: Deprecated: 3.20: There is only one screen; use get_default_screen() to get it.

Deprecated:: There is only one screen; use get_default_screen() to get it.

Parameters

screen_num The screen number.

Returns: The Gdk::Screen object.

Glib::RefPtr<Window> Gdk::Display::get_selection_owner ( const Glib::ustring & selection )

static GType Gdk::Display::get_type ( )

static

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

GdkDisplay* Gdk::Display::gobj ( )

inline

Provides access to the underlying C GObject.

const GdkDisplay* Gdk::Display::gobj ( ) const

inline

Provides access to the underlying C GObject.

GdkDisplay* Gdk::Display::gobj_copy ( )

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

bool Gdk::Display::has_pending ( ) const

Returns whether the display has events that are waiting to be processed.

Since gtkmm 3.0:

Returns: true if there are events ready to be processed.

bool Gdk::Display::is_closed ( ) const

Finds out if the display has been closed.

Since gtkmm 2.22:

Returns: true if the display is closed.

std::vector<Glib::RefPtr<Seat> > Gdk::Display::list_seats ( )

Returns the list of seats known to display.

Since gtkmm 3.20:

Returns: The list of seats known to the Gdk::Display.

std::vector<Glib::RefPtr<const Seat> > Gdk::Display::list_seats ( ) const

Returns the list of seats known to display.

Since gtkmm 3.20:

Returns: The list of seats known to the Gdk::Display.

void Gdk::Display::notify_startup_complete ( const Glib::ustring & startup_id )

Indicates to the GUI environment that the application has finished loading, using a given identifier.

GTK+ will call this function automatically for Gtk::Window with custom startup-notification identifier unless gtk_window_set_auto_startup_notification() is called to disable that feature.

Since gtkmm 3.0:

Parameters

startup_id A startup-notification identifier, for which notification process should be completed.

static Glib::RefPtr<Display> Gdk::Display::open ( const Glib::ustring & display_name )

static

Opens a display.

Since gtkmm 2.2:

Parameters

display_name The name of the display to open.

Returns: A Gdk::Display, or nullptr if the display could not be opened.

static Glib::RefPtr<Display> Gdk::Display::open_default_libgtk_only ( )

static

Opens the default display specified by command line arguments or environment variables, sets it as the default display, and returns it.

gdk_parse_args() must have been called first. If the default display has previously been set, simply returns that. An internal function that should not be used by applications.

Deprecated: 3.16: This symbol was never meant to be used outside of GTK+

Deprecated:: This method was never meant to be used outside of GTK+.

Returns: The default display, if it could be opened, otherwise nullptr.

Display& Gdk::Display::operator= ( Display&& src )

noexcept

GdkEvent* Gdk::Display::peek_event ( )

Gets a copy of the first Gdk::Event in the display’s event queue, without removing the event from the queue.

(Note that this function will not get more events from the windowing system. It only checks the events that have already been moved to the GDK event queue.)

Since gtkmm 2.2:

Returns: A copy of the first Gdk::Event on the event queue, or nullptr if no events are in the queue. The returned Gdk::Event should be freed with Gdk::Event::free().

GdkEvent* Gdk::Display::peek_event ( ) const

Gets a copy of the first Gdk::Event in the display’s event queue, without removing the event from the queue.

(Note that this function will not get more events from the windowing system. It only checks the events that have already been moved to the GDK event queue.)

Since gtkmm 2.2:

Returns: A copy of the first Gdk::Event on the event queue, or nullptr if no events are in the queue. The returned Gdk::Event should be freed with Gdk::Event::free().

void Gdk::Display::put_event ( GdkEvent * event )

Appends a copy of the given event onto the front of the event queue for display.

Since gtkmm 2.2:

Parameters

event A Gdk::Event.

bool Gdk::Display::request_selection_notification ( const Glib::ustring & selection )

Request Gdk::EventOwnerChange events for ownership changes of the selection named by the given atom.

Since gtkmm 2.6:

Parameters

selection The Gdk::Atom naming the selection for which ownership change notification is requested.

Returns: Whether Gdk::EventOwnerChange events will be sent.

void Gdk::Display::selection_send_notify	(	const Glib::RefPtr< Window >&	requestor,
		Glib::ustring &	selection,
		Glib::ustring &	target,
		Glib::ustring &	property,
		guint32	time_
	)

Send a response to SelectionRequest event.

Since gtkmm 2.2:

Parameters

requestor	Window to which to deliver response.
selection	Selection that was requested.
target	Target that was selected.
property	Property in which the selection owner stored the data, or "None" to indicate that the request was rejected.
time_	Timestamp.

void Gdk::Display::set_double_click_distance ( guint distance )

Sets the double click distance (two clicks within this distance count as a double click and result in a Gdk::2BUTTON_PRESS event).

See also set_double_click_time(). Applications should not set this, it is a global user-configured setting.

Since gtkmm 2.4:

Deprecated:: No replacement method. Applications should not set this.

Parameters

distance Distance in pixels.

void Gdk::Display::set_double_click_time ( guint msec )

Sets the double click time (two clicks within this time interval count as a double click and result in a Gdk::2BUTTON_PRESS event).

Applications should not set this, it is a global user-configured setting.

Since gtkmm 2.2:

Deprecated:: No replacement method. Applications should not set this.

Parameters

msec	Double click time in milliseconds (thousandths of a second).

bool Gdk::Display::set_selection_owner	(	const Glib::RefPtr< Window >&	owner,
		Glib::ustring &	selection,
		guint32	time_,
		bool	send_event
	)

Glib::SignalProxy< void,bool > Gdk::Display::signal_closed ( )

Slot Prototype:: void on_my_closed(bool is_error)

The signal_closed() signal is emitted when the connection to the windowing system for display is closed.

Since gtkmm 2.2:

Parameters

is_error true if the display was closed due to an error.

Glib::SignalProxy< void,const Glib::RefPtr<Monitor>& > Gdk::Display::signal_monitor_added ( )

Slot Prototype:: void on_my_monitor_added(const Glib::RefPtr<Monitor>& monitor)

The signal_monitor_added() signal is emitted whenever a monitor is added.

Since gtkmm 3.22:

Parameters

monitor The monitor that was just added.

Glib::SignalProxy< void,const Glib::RefPtr<Monitor>& > Gdk::Display::signal_monitor_removed ( )

Slot Prototype:: void on_my_monitor_removed(const Glib::RefPtr<Monitor>& monitor)

The signal_monitor_removed() signal is emitted whenever a monitor is removed.

Since gtkmm 3.22:

Parameters

monitor The monitor that was just removed.

Glib::SignalProxy< void > Gdk::Display::signal_opened ( )

Slot Prototype:: void on_my_opened()

The signal_opened() signal is emitted when the connection to the windowing system for display is opened.

Glib::SignalProxy< void,const Glib::RefPtr<Seat>& > Gdk::Display::signal_seat_added ( )

Slot Prototype:: void on_my_seat_added(const Glib::RefPtr<Seat>& seat)

The signal_seat_added() signal is emitted whenever a new seat is made known to the windowing system.

Since gtkmm 3.20:

Parameters

seat	The seat that was just added.

Glib::SignalProxy< void,const Glib::RefPtr<Seat>& > Gdk::Display::signal_seat_removed ( )

Slot Prototype:: void on_my_seat_removed(const Glib::RefPtr<Seat>& seat)

The signal_seat_removed() signal is emitted whenever a seat is removed by the windowing system.

Since gtkmm 3.20:

Parameters

seat	The seat that was just removed.

void Gdk::Display::store_clipboard	(	const Glib::RefPtr< Gdk::Window >&	clipboard_window,
		guint32	time_
	)

Issues a request to the clipboard manager to store the clipboard data, saving all available targets.

On X11, this is a special program that works according to the freedesktop clipboard specification, available at http://www.freedesktop.org/Standards/clipboard-manager-spec.

Since gtkmm 2.6:

Parameters

clipboard_window	A Gdk::Window belonging to the clipboard owner.
time_	A timestamp.

void Gdk::Display::store_clipboard	(	const Glib::RefPtr< Gdk::Window >&	clipboard_window,
		guint32	time_,
		const std::vector< Glib::ustring > &	targets
	)

bool Gdk::Display::supports_clipboard_persistence ( ) const

Returns whether the speicifed display supports clipboard persistance; i.e. if it’s possible to store the clipboard data after an application has quit.

On X11 this checks if a clipboard daemon is running.

Since gtkmm 2.6:

Returns: true if the display supports clipboard persistance.

bool Gdk::Display::supports_composite ( ) const

Returns true if Gdk::Window::set_composited() can be used to redirect drawing on the window using compositing.

Currently this only works on X11 with XComposite and XDamage extensions available.

Since gtkmm 2.12:

Deprecated: 3.16: Compositing is an outdated technology that only ever worked on X11.

Deprecated:: Compositing is an outdated technology that only ever worked on X11.

Returns: true if windows may be composited.

bool Gdk::Display::supports_cursor_alpha ( ) const

Returns true if cursors can use an 8bit alpha channel on display.

Otherwise, cursors are restricted to bilevel alpha (i.e. a mask).

Since gtkmm 2.4:

Returns: Whether cursors can have alpha channels.

bool Gdk::Display::supports_cursor_color ( ) const

Returns true if multicolored cursors are supported on display.

Otherwise, cursors have only a forground and a background color.

Since gtkmm 2.4:

Returns: Whether cursors can have multiple colors.

bool Gdk::Display::supports_input_shapes ( ) const

Returns true if gdk_window_input_shape_combine_mask() can be used to modify the input shape of windows on display.

Since gtkmm 2.10:

Returns: true if windows with modified input shape are supported.

bool Gdk::Display::supports_selection_notification ( ) const

Returns whether Gdk::EventOwnerChange events will be sent when the owner of a selection changes.

Since gtkmm 2.6:

Returns: Whether Gdk::EventOwnerChange events will be sent.

bool Gdk::Display::supports_shapes ( ) const

Returns true if gdk_window_shape_combine_mask() can be used to create shaped windows on display.

Since gtkmm 2.10:

Returns: true if shaped windows are supported.

void Gdk::Display::sync ( )

Flushes any requests queued for the windowing system and waits until all requests have been handled.

This is often used for making sure that the display is synchronized with the current state of the program. Calling sync() before gdk_error_trap_pop() makes sure that any errors generated from earlier requests are handled before the error trap is removed.

This is most useful for X11. On windowing systems where requests are handled synchronously, this function will do nothing.

Since gtkmm 2.2:

Friends And Related Function Documentation

Glib::RefPtr< Gdk::Display > wrap	(	GdkDisplay *	object,
		bool	take_copy = `false`
	)

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.

gtkmm: Gdk::Display Class Reference

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation