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...

Inheritance diagram for Gdk::Display:

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Collaboration diagram for Gdk::Display:

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List of all members.

Public Member Functions
virtual	~Display ()
GdkDisplay*	gobj ()
	Provides access to the underlying C GObject.
const GdkDisplay*	gobj () const
	Provides access to the underlying C GObject.
GdkDisplay*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
Glib::ustring	get_name () const
	Gets the name of the display.
int	get_n_screens () const
	Gets the number of screen managed by the display.
Glib::RefPtr< Screen >	get_screen (int screen_num)
	Returns a screen object for one of the screens of the display.
Glib::RefPtr< const Screen >	get_screen (int screen_num) const
	Returns a screen object for one of the screens of the display.
Glib::RefPtr< Screen >	get_default_screen ()
	Get the default Gdk::Screen for display.
Glib::RefPtr< const Screen >	get_default_screen () const
	Get the default Gdk::Screen for display.
void	beep ()
	Emits a short beep on display.
void	sync ()
	Flushes any requests queued for the windowing system and waits until all requests have been handled.
void	close ()
	Closes the connection to the windowing system for the given display, and cleans up associated resources.
bool	is_closed () const
GdkEvent*	get_event ()
	Gets the next Gdk::Event to be processed for display, fetching events from the windowing system if necessary.
const GdkEvent*	get_event () const
	Gets the next Gdk::Event to be processed for display, fetching events from the windowing system if necessary.
GdkEvent*	peek_event ()
	Gets a copy of the first Gdk::Event in the display's event queue, without removing the event from the queue.
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.
void	put_event (GdkEvent* event)
	Appends a copy of the given event onto the front of the event queue for display.
bool	has_pending () const
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).
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).
GdkKeymap*	get_keymap ()
	Returns the Gdk::Keymap attached to display.
const GdkKeymap*	get_keymap () const
	Returns the Gdk::Keymap attached to display.
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.
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 explicitely.
bool	supports_cursor_alpha () const
	Returns `true` if cursors can use an 8bit alpha channel on display.
bool	supports_cursor_color () const
	Returns `true` if multicolored cursors are supported on display.
guint	get_default_cursor_size () const
	Returns the default size to use for cursors on display.
void	get_maximal_cursor_size (guint& width, guint& height)
	Gets the maximal size to use for cursors on display.
Glib::RefPtr< Window >	get_default_group ()
	Returns the default group leader window for all toplevel windows on display.
Glib::RefPtr< const Window >	get_default_group () const
	Returns the default group leader window for all toplevel windows on display.
bool	supports_selection_notification () const
	Returns whether Gdk::EventOwnerChange events will be sent when the owner of a selection changes.
bool	request_selection_notification (const Glib::ustring& selection)
	Request Gdk::EventOwnerChange events for ownership changes of the selection named by the given atom.
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.
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.
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.
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.
bool	supports_composite () const
	Returns `true` if Gdk::Window::set_composited() can be used to redirect drawing on the window using compositing.
void	notify_startup_complete (const Glib::ustring& startup_id)
Glib::RefPtr< DeviceManager >	get_device_manager ()
Glib::RefPtr< const DeviceManager >	get_device_manager () const
Glib::SignalProxy1< void, bool >	signal_closed ()
	The closed signal is emitted when the connection to the windowing system for this display is closed.
Glib::SignalProxy0< void >	signal_opened ()
Static Public Member Functions
static Glib::RefPtr< Display >	open (const Glib::ustring& display_name)
	Opens a display.
static Glib::RefPtr< Display >	get_default ()
	Gets the default Gdk::Display.
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.
Protected Member Functions
	Display ()
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.

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

virtual Gdk::Display::~Display ( ) [virtual]

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:

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 explicitely.

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:

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 (manager_get()).

Since gtkmm 2.2:

Returns:: A Gdk::Display, or 0 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<const DeviceManager> Gdk::Display::get_device_manager ( ) const

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

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 0 if no events are pending. The returned Gdk::Event should be freed with Gdk::Event::free().

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 0 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.

int Gdk::Display::get_n_screens ( ) const

Gets the number of screen managed by the display.

Since gtkmm 2.2:

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<const Screen> Gdk::Display::get_screen ( int screen_num ) const

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

Since gtkmm 2.2:

Parameters:

screen_num The screen number.

Returns:: The Gdk::Screen object.

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

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

Since gtkmm 2.2:

Parameters:

screen_num The screen number.

Returns:: The Gdk::Screen object.

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

GdkDisplay* Gdk::Display::gobj ( ) [inline]

Provides access to the underlying C GObject.

Reimplemented from Glib::ObjectBase.

const GdkDisplay* Gdk::Display::gobj ( ) const [inline]

Provides access to the underlying C GObject.

Reimplemented from Glib::ObjectBase.

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

bool Gdk::Display::is_closed ( ) const

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

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 0 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.

Returns:: The default display, if it could be opened, otherwise 0.

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 0 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 0 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:

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:

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::SignalProxy1< void,bool > Gdk::Display::signal_closed ( )

The closed signal is emitted when the connection to the windowing system for this display is closed.

Parameters:

is_error true if the display was closed due to an error

Prototype:: void on_my_closed(bool is_error)

Glib::SignalProxy0< void > Gdk::Display::signal_opened ( )

Prototype:: void on_my_opened()

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

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.

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:

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`
	)		`[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.

The documentation for this class was generated from the following file:

gdkmm/display.h

gtkmm: Gdk::Display Class Reference

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation