Memory-managed wrapper type.

Type class for types which can be safely cast to Display, for instance with toDisplay.

Cast to Display, for types for which this is known to be safe. For general casts, use castTo.

A convenience alias for Nothing :: Maybe Display.

Emits a short beep on display

Since: 2.2

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

Since: 2.2

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

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: 2.4

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

Since: 3.0

Gets the default Display. This is a convenience function for: gdk_display_manager_get_default_display (gdk_display_manager_get ()).

Since: 2.2

Returns the default size to use for cursors on display.

Since: 2.4

Returns the default group leader window for all toplevel windows on display. This window is implicitly created by GDK. See windowSetGroup.

Since: 2.4

Get the default Screen for display.

Since: 2.2

Returns the default Seat for this display.

Since: 3.20

Returns the DeviceManager associated to display.

Since: 3.0

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

Since: 2.2

Gets the maximal size to use for cursors on display.

Since: 2.4

Gets a monitor associated with this display.

Since: 3.22

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

Since: 3.22

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: 3.22

Gets the number of monitors that belong to display.

The returned number is valid until the next emission of the Display::monitor-added or Display::monitor-removed signal.

Since: 3.22

Gets the number of screen managed by the display.

Since: 2.2

Gets the name of the display.

Since: 2.2

Gets the current location of the pointer and the current modifier mask for a given display.

Since: 2.2

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: 3.22

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

Since: 2.2

Obtains the window underneath the mouse pointer, returning the location of the pointer in that window in winX, winY for screen. Returns Nothing if the window under the mouse pointer is not known to GDK (for example, belongs to another application).

Since: 2.2

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

Since: 3.0

Finds out if the display has been closed.

Since: 2.22

Release any keyboard grab

Since: 2.2

Returns the list of available input devices attached to display. The list is statically allocated and should not be freed.

Since: 2.2

Returns the list of seats known to display.

Since: 3.20

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

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

Since: 3.0

Opens a display.

Since: 2.2

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

Gets a copy of the first 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: 2.2

Test if the pointer is grabbed.

Since: 2.2

Release any pointer grab.

Since: 2.2

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

Since: 2.2

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

Since: 2.6

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

Since: 2.4

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: 2.2

Issues a request to the clipboard manager to store the clipboard data. On X11, this is a special program that works according to the FreeDesktop Clipboard Specification.

Since: 2.6

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: 2.6

Returns True if windowSetComposited can be used to redirect drawing on the window using compositing.

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

Since: 2.12

Returns True if cursors can use an 8bit alpha channel on display. Otherwise, cursors are restricted to bilevel alpha (i.e. a mask).

Since: 2.4

Returns True if multicolored cursors are supported on display. Otherwise, cursors have only a forground and a background color.

Since: 2.4

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

Since: 2.10

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

Since: 2.6

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

Since: 2.10

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 displaySync before errorTrapPop 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: 2.2

Warps the pointer of display to the point x,y on the screen screen, unless the pointer is confined to a window by a grab, in which case it will be moved as far as allowed by the grab. Warping the pointer creates events as if the user had moved the mouse instantaneously to the destination.

Note that the pointer should normally be under the control of the user. This function was added to cover some rare use cases like keyboard navigation support for the color picker in the GtkColorSelectionDialog.

Since: 2.8

Type for the callback on the (unwrapped) C side.

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

Since: 2.2

Connect a signal handler for the “closed” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after display #closed callback

Wrap the callback into a Closure.

Generate a function pointer callable from C code, from a C_DisplayClosedCallback.

A convenience synonym for Nothing :: Maybe DisplayClosedCallback.

Connect a signal handler for the “closed” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on display #closed callback

Wrap a DisplayClosedCallback into a C_DisplayClosedCallback.

Type for the callback on the (unwrapped) C side.

The ::monitor-added signal is emitted whenever a monitor is added.

Since: 3.22

Connect a signal handler for the “monitor-added” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after display #monitorAdded callback

Wrap the callback into a Closure.

Generate a function pointer callable from C code, from a C_DisplayMonitorAddedCallback.

A convenience synonym for Nothing :: Maybe DisplayMonitorAddedCallback.

Connect a signal handler for the “monitor-added” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on display #monitorAdded callback

Wrap a DisplayMonitorAddedCallback into a C_DisplayMonitorAddedCallback.

Type for the callback on the (unwrapped) C side.

The ::monitor-removed signal is emitted whenever a monitor is removed.

Since: 3.22

Connect a signal handler for the “monitor-removed” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after display #monitorRemoved callback

Wrap the callback into a Closure.

Generate a function pointer callable from C code, from a C_DisplayMonitorRemovedCallback.

A convenience synonym for Nothing :: Maybe DisplayMonitorRemovedCallback.

Connect a signal handler for the “monitor-removed” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on display #monitorRemoved callback

Wrap a DisplayMonitorRemovedCallback into a C_DisplayMonitorRemovedCallback.

Type for the callback on the (unwrapped) C side.

The ::opened signal is emitted when the connection to the windowing system for display is opened.

Connect a signal handler for the “opened” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after display #opened callback

Wrap the callback into a Closure.

Generate a function pointer callable from C code, from a C_DisplayOpenedCallback.

A convenience synonym for Nothing :: Maybe DisplayOpenedCallback.

Connect a signal handler for the “opened” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on display #opened callback

Wrap a DisplayOpenedCallback into a C_DisplayOpenedCallback.

Type for the callback on the (unwrapped) C side.

The ::seat-added signal is emitted whenever a new seat is made known to the windowing system.

Since: 3.20

Connect a signal handler for the “seat-added” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after display #seatAdded callback

Wrap the callback into a Closure.

Generate a function pointer callable from C code, from a C_DisplaySeatAddedCallback.

A convenience synonym for Nothing :: Maybe DisplaySeatAddedCallback.

Connect a signal handler for the “seat-added” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on display #seatAdded callback

Wrap a DisplaySeatAddedCallback into a C_DisplaySeatAddedCallback.

Type for the callback on the (unwrapped) C side.

The ::seat-removed signal is emitted whenever a seat is removed by the windowing system.

Since: 3.20

Connect a signal handler for the “seat-removed” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after display #seatRemoved callback

Wrap the callback into a Closure.

Generate a function pointer callable from C code, from a C_DisplaySeatRemovedCallback.

A convenience synonym for Nothing :: Maybe DisplaySeatRemovedCallback.

Connect a signal handler for the “seat-removed” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on display #seatRemoved callback

Wrap a DisplaySeatRemovedCallback into a C_DisplaySeatRemovedCallback.