gtkmm: Gdk::Screen Class Reference

Object representing a physical screen Gdk::Screen objects are the GDK representation of a physical screen. More...

Inheritance diagram for Gdk::Screen:

Collaboration diagram for Gdk::Screen:

Public Member Functions
	Screen (Screen&& src) noexcept

Screen&	operator= (Screen&& src) noexcept

	~Screen () noexceptoverride

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

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

GdkScreen*	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< Colormap >	get_default_colormap ()
	Gets the default colormap for screen. More...

Glib::RefPtr< const Colormap >	get_default_colormap () const
	Gets the default colormap for screen. More...

void	set_default_colormap (const Glib::RefPtr< const Colormap >& colormap)
	Sets the default colormap for screen. More...

Glib::RefPtr< Colormap >	get_system_colormap ()
	Gets the system's default colormap for screen. More...

Glib::RefPtr< const Colormap >	get_system_colormap () const
	Gets the system's default colormap for screen. More...

Glib::RefPtr< Visual >	get_system_visual ()
	Get the system's default visual for screen. More...

Glib::RefPtr< const Visual >	get_system_visual () const
	Get the system's default visual for screen. More...

Glib::RefPtr< Colormap >	get_rgb_colormap ()
	Gets the preferred colormap for rendering image data on screen. More...

Glib::RefPtr< const Colormap >	get_rgb_colormap () const
	Gets the preferred colormap for rendering image data on screen. More...

Glib::RefPtr< Visual >	get_rgb_visual ()
	Gets a "preferred visual" chosen by GdkRGB for rendering image data on screen. More...

Glib::RefPtr< const Visual >	get_rgb_visual () const
	Gets a "preferred visual" chosen by GdkRGB for rendering image data on screen. More...

Glib::RefPtr< Colormap >	get_rgba_colormap ()
	Gets a colormap to use for creating windows or pixmaps with an alpha channel. More...

Glib::RefPtr< const Colormap >	get_rgba_colormap () const
	Gets a colormap to use for creating windows or pixmaps with an alpha channel. More...

Glib::RefPtr< Visual >	get_rgba_visual ()
	Gets a visual to use for creating windows or pixmaps with an alpha channel. More...

Glib::RefPtr< const Visual >	get_rgba_visual () const
	Gets a visual to use for creating windows or pixmaps with an alpha channel. More...

bool	is_composited () const
	Returns whether windows with an RGBA visual can reasonably be expected to have their alpha channel drawn correctly on the screen. More...

Glib::RefPtr< Window >	get_root_window ()
	Gets the root window of screen. More...

Glib::RefPtr< const Window >	get_root_window () const
	Gets the root window of screen. More...

Glib::RefPtr< Display >	get_display ()
	Gets the display to which the screen belongs. More...

Glib::RefPtr< const Display >	get_display () const
	Gets the display to which the screen belongs. More...

int	get_number () const
	Gets the index of screen among the screens in the display to which it belongs. More...

int	get_width () const
	Gets the width of screen in pixels. More...

int	get_height () const
	Gets the height of screen in pixels. More...

int	get_width_mm () const
	Gets the width of screen in millimeters. More...

int	get_height_mm () const
	Returns the height of screen in millimeters. More...

Glib::ListHandle< Glib::RefPtr< Visual > >	list_visuals ()
	Lists the available visuals for the specified screen. More...

Glib::ListHandle< Glib::RefPtr< Window > >	get_toplevel_windows ()
	Obtains a list of all toplevel windows known to GDK on the screen screen. More...

Glib::ustring	make_display_name ()
	Determines the name to pass to Gdk::Display::open() to get a Gdk::Display with this screen as the default screen. More...

int	get_n_monitors () const
	Returns the number of monitors which screen consists of. More...

int	get_primary_monitor () const
	Gets the primary monitor for screen. More...

void	get_monitor_geometry (int monitor_num, Rectangle& dest) const
	Retrieves the Gdk::Rectangle representing the size and position of the individual monitor within the entire screen area. More...

int	get_monitor_at_point (int x, int y) const
	Returns the monitor number in which the point ( x, y) is located. More...

int	get_monitor_at_window (const Glib::RefPtr< Window >& window) const
	Returns the number of the monitor in which the largest area of the bounding rectangle of window resides. More...

int	get_monitor_width_mm (int monitor_num) const
	Gets the width in millimeters of the specified monitor, if available. More...

int	get_monitor_height_mm (int monitor_num) const
	Gets the height in millimeters of the specified monitor. More...

Glib::ustring	get_monitor_plug_name (int monitor_num) const
	Returns the output name of the specified monitor. More...

void	broadcast_client_message (GdkEvent* event)
	On X11, sends an X ClientMessage event to all toplevel windows on screen. More...

template<class ValueType >
bool	get_setting (const Glib::ustring& name, ValueType& value) const

void	set_font_options (const Cairo::FontOptions& options)
	Sets the default font options for the screen. More...

Cairo::FontOptions	get_font_options () const
	Gets any options previously set with set_font_options(). More...

void	set_resolution (double dpi)
	Sets the resolution for font handling on the screen. More...

double	get_resolution () const
	Gets the resolution for font handling on the screen; see set_resolution() for full details. More...

Glib::RefPtr< Gdk::Window >	get_active_window ()
	Returns the screen's currently active window. More...

Glib::RefPtr< const Gdk::Window >	get_active_window () const
	Returns the screen's currently active window. More...

Glib::ListHandle< Glib::RefPtr< Window > >	get_window_stack ()
	Returns a List of Gdk::Windows representing the current window stack. More...

Glib::SignalProxy< void >	signal_size_changed ()
	The size_changed signal is emitted when the pixel width or height of a screen changes. More...

Glib::SignalProxy< void >	signal_composited_changed ()

Glib::SignalProxy< void >	signal_monitors_changed ()

Glib::PropertyProxy< Cairo::FontOptions >	property_font_options ()
	The default font options for the screen. More...

Glib::PropertyProxy_ReadOnly< Cairo::FontOptions >	property_font_options () const
	The default font options for the screen. More...

Glib::PropertyProxy< double >	property_resolution ()
	The resolution for fonts on the screen. More...

Glib::PropertyProxy_ReadOnly< double >	property_resolution () const
	The resolution for fonts on the screen. 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< Screen >	get_default ()
	Gets the default screen for the default display. More...

Protected Member Functions
virtual void	on_size_changed ()
	This is a default handler for the signal signal_size_changed(). 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< Gdk::Screen >	wrap (GdkScreen* 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

Object representing a physical screen Gdk::Screen objects are the GDK representation of a physical screen.

It is used throughout GDK and GTK+ to specify which screen the top level windows are to be displayed on. It is also used to query the screen specification and default settings such as the default colormap (get_default_colormap()), the screen width (get_width()), etc. Note that a screen may consist of multiple monitors which are merged to form a large screen area.

Constructor & Destructor Documentation

Gdk::Screen::Screen ( Screen&& src )

noexcept

Gdk::Screen::~Screen ( )

overridenoexcept

Member Function Documentation

void Gdk::Screen::broadcast_client_message ( GdkEvent * event )

On X11, sends an X ClientMessage event to all toplevel windows on screen.

Toplevel windows are determined by checking for the WM_STATE property, as described in the Inter-Client Communication Conventions Manual (ICCCM). If no windows are found with the WM_STATE property set, the message is sent to all children of the root window.

On Windows, broadcasts a message registered with the name GDK_WIN32_CLIENT_MESSAGE to all top-level windows. The amount of data is limited to one long, i.e. four bytes.

Since gtkmm 2.2:

Parameters

event The Gdk::Event.

Glib::RefPtr<Gdk::Window> Gdk::Screen::get_active_window ( )

Returns the screen's currently active window.

On X11, this is done by inspecting the _NET_ACTIVE_WINDOW property on the root window, as described in the Extended Window Manager Hints. If there is no currently currently active window, or the window manager does not support the _NET_ACTIVE_WINDOW hint, this function returns nullptr.

On other platforms, this function may return nullptr, depending on whether it is implementable on that platform.

The returned window should be unrefed using Glib::object_unref() when no longer needed.

Since gtkmm 2.10:

Returns: The currently active window, or nullptr.

Glib::RefPtr<const Gdk::Window> Gdk::Screen::get_active_window ( ) const

Returns the screen's currently active window.

On other platforms, this function may return nullptr, depending on whether it is implementable on that platform.

The returned window should be unrefed using Glib::object_unref() when no longer needed.

Since gtkmm 2.10:

Returns: The currently active window, or nullptr.

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

static

Gets the default screen for the default display.

(See Gdk::Display::get_default()).

Since gtkmm 2.2:

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

Glib::RefPtr<Colormap> Gdk::Screen::get_default_colormap ( )

Gets the default colormap for screen.

Since gtkmm 2.2:

Returns: The default Gdk::Colormap.

Glib::RefPtr<const Colormap> Gdk::Screen::get_default_colormap ( ) const

Gets the default colormap for screen.

Since gtkmm 2.2:

Returns: The default Gdk::Colormap.

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

Gets the display to which the screen belongs.

Since gtkmm 2.2:

Returns: The display to which screen belongs.

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

Gets the display to which the screen belongs.

Since gtkmm 2.2:

Returns: The display to which screen belongs.

Cairo::FontOptions Gdk::Screen::get_font_options ( ) const

Gets any options previously set with set_font_options().

Since gtkmm 2.10:

Returns: The current font options, or nullptr if no default font options have been set.

int Gdk::Screen::get_height ( ) const

Gets the height of screen in pixels.

Since gtkmm 2.2:

Returns: The height of screen in pixels.

int Gdk::Screen::get_height_mm ( ) const

Returns the height of screen in millimeters.

Note that on some X servers this value will not be correct.

Since gtkmm 2.2:

Returns: The heigth of screen in millimeters.

int Gdk::Screen::get_monitor_at_point	(	int	x,
		int	y
	)		const

Returns the monitor number in which the point ( x, y) is located.

Since gtkmm 2.2:

Parameters

x	The x coordinate in the virtual screen.
y	The y coordinate in the virtual screen.

Returns: The monitor number in which the point ( x, y) lies, or a monitor close to ( x, y) if the point is not in any monitor.

int Gdk::Screen::get_monitor_at_window ( const Glib::RefPtr< Window >& window ) const

Returns the number of the monitor in which the largest area of the bounding rectangle of window resides.

Since gtkmm 2.2:

Parameters

window A Gdk::Window.

Returns: The monitor number in which most of window is located, or if window does not intersect any monitors, a monitor, close to window.

void Gdk::Screen::get_monitor_geometry	(	int	monitor_num,
		Rectangle&	dest
	)		const

Retrieves the Gdk::Rectangle representing the size and position of the individual monitor within the entire screen area.

Note that the size of the entire screen area can be retrieved via get_width() and get_height().

Since gtkmm 2.2:

Parameters

monitor_num	The monitor number, between 0 and gdk_screen_get_n_monitors (screen).
dest	A Gdk::Rectangle to be filled with the monitor geometry.

int Gdk::Screen::get_monitor_height_mm ( int monitor_num ) const

Gets the height in millimeters of the specified monitor.

Since gtkmm 2.14:

Parameters

monitor_num Number of the monitor, between 0 and gdk_screen_get_n_monitors (screen).

Returns: The height of the monitor, or -1 if not available.

Glib::ustring Gdk::Screen::get_monitor_plug_name ( int monitor_num ) const

Returns the output name of the specified monitor.

Usually something like VGA, DVI, or TV, not the actual product name of the display device.

Since gtkmm 2.14:

Parameters

monitor_num Number of the monitor, between 0 and gdk_screen_get_n_monitors (screen).

Returns: A newly-allocated string containing the name of the monitor, or nullptr if the name cannot be determined.

int Gdk::Screen::get_monitor_width_mm ( int monitor_num ) const

Gets the width in millimeters of the specified monitor, if available.

Since gtkmm 2.14:

Parameters

monitor_num Number of the monitor, between 0 and gdk_screen_get_n_monitors (screen).

Returns: The width of the monitor, or -1 if not available.

int Gdk::Screen::get_n_monitors ( ) const

Returns the number of monitors which screen consists of.

Since gtkmm 2.2:

Returns: Number of monitors which screen consists of.

int Gdk::Screen::get_number ( ) const

Gets the index of screen among the screens in the display to which it belongs.

(See get_display())

Since gtkmm 2.2:

Returns: The index.

int Gdk::Screen::get_primary_monitor ( ) const

Gets the primary monitor for screen.

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.

If no primary monitor is configured by the user, the return value will be 0, defaulting to the first monitor.

Since gtkmm 2.20:

Returns: An integer index for the primary monitor, or 0 if none is configured.

double Gdk::Screen::get_resolution ( ) const

Gets the resolution for font handling on the screen; see set_resolution() for full details.

Since gtkmm 2.10:

Returns: The current resolution, or -1 if no resolution has been set.

Glib::RefPtr<Colormap> Gdk::Screen::get_rgb_colormap ( )

Gets the preferred colormap for rendering image data on screen.

Not a very useful function; historically, GDK could only render RGB image data to one colormap and visual, but in the current version it can render to any colormap and visual. So there's no need to call this function.

Since gtkmm 2.2:

Deprecated: 2.22: Use get_system_colormap()

Returns: The preferred colormap.

Glib::RefPtr<const Colormap> Gdk::Screen::get_rgb_colormap ( ) const

Gets the preferred colormap for rendering image data on screen.

Since gtkmm 2.2:

Deprecated: 2.22: Use get_system_colormap()

Returns: The preferred colormap.

Glib::RefPtr<Visual> Gdk::Screen::get_rgb_visual ( )

Gets a "preferred visual" chosen by GdkRGB for rendering image data on screen.

In previous versions of GDK, this was the only visual GdkRGB could use for rendering. In current versions, it's simply the visual GdkRGB would have chosen as the optimal one in those previous versions. GdkRGB can now render to drawables with any visual.

Since gtkmm 2.2:

Deprecated: 2.22: Use get_system_visual()

Returns: The Gdk::Visual chosen by GdkRGB.

Glib::RefPtr<const Visual> Gdk::Screen::get_rgb_visual ( ) const

Gets a "preferred visual" chosen by GdkRGB for rendering image data on screen.

Since gtkmm 2.2:

Deprecated: 2.22: Use get_system_visual()

Returns: The Gdk::Visual chosen by GdkRGB.

Glib::RefPtr<Colormap> Gdk::Screen::get_rgba_colormap ( )

Gets a colormap to use for creating windows or pixmaps with an alpha channel.

The windowing system on which GTK+ is running may not support this capability, in which case nullptr will be returned. Even if a non-nullptr value is returned, its possible that the window's alpha channel won't be honored when displaying the window on the screen: in particular, for X an appropriate windowing manager and compositing manager must be running to provide appropriate display.

This functionality is not implemented in the Windows backend.

For setting an overall opacity for a top-level window, see Gdk::Window::set_opacity().

Since gtkmm 2.8:

Returns: A colormap to use for windows with an alpha channel or nullptr if the capability is not available.

Glib::RefPtr<const Colormap> Gdk::Screen::get_rgba_colormap ( ) const

Gets a colormap to use for creating windows or pixmaps with an alpha channel.

This functionality is not implemented in the Windows backend.

For setting an overall opacity for a top-level window, see Gdk::Window::set_opacity().

Since gtkmm 2.8:

Returns: A colormap to use for windows with an alpha channel or nullptr if the capability is not available.

Glib::RefPtr<Visual> Gdk::Screen::get_rgba_visual ( )

Gets a visual to use for creating windows or pixmaps with an alpha channel.

See the docs for get_rgba_colormap() for caveats.

Since gtkmm 2.8:

Returns: A visual to use for windows with an alpha channel or nullptr if the capability is not available.

Glib::RefPtr<const Visual> Gdk::Screen::get_rgba_visual ( ) const

Gets a visual to use for creating windows or pixmaps with an alpha channel.

See the docs for get_rgba_colormap() for caveats.

Since gtkmm 2.8:

Returns: A visual to use for windows with an alpha channel or nullptr if the capability is not available.

Glib::RefPtr<Window> Gdk::Screen::get_root_window ( )

Gets the root window of screen.

Since gtkmm 2.2:

Returns: The root window.

Glib::RefPtr<const Window> Gdk::Screen::get_root_window ( ) const

Gets the root window of screen.

Since gtkmm 2.2:

Returns: The root window.

template <class ValueType >

bool Gdk::Screen::get_setting	(	const Glib::ustring &	name,
		ValueType &	value
	)		const

Glib::RefPtr<Colormap> Gdk::Screen::get_system_colormap ( )

Gets the system's default colormap for screen.

Since gtkmm 2.2:

Returns: The default colormap for screen.

Glib::RefPtr<const Colormap> Gdk::Screen::get_system_colormap ( ) const

Gets the system's default colormap for screen.

Since gtkmm 2.2:

Returns: The default colormap for screen.

Glib::RefPtr<Visual> Gdk::Screen::get_system_visual ( )

Get the system's default visual for screen.

This is the visual for the root window of the display. The return value should not be freed.

Since gtkmm 2.2:

Returns: The system visual.

Glib::RefPtr<const Visual> Gdk::Screen::get_system_visual ( ) const

Get the system's default visual for screen.

This is the visual for the root window of the display. The return value should not be freed.

Since gtkmm 2.2:

Returns: The system visual.

Glib::ListHandle< Glib::RefPtr<Window> > Gdk::Screen::get_toplevel_windows ( )

Obtains a list of all toplevel windows known to GDK on the screen screen.

A toplevel window is a child of the root window (see gdk_get_default_root_window()).

Since gtkmm 2.2:

Returns: List of toplevel windows.

static GType Gdk::Screen::get_type ( )

static

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

int Gdk::Screen::get_width ( ) const

Gets the width of screen in pixels.

Since gtkmm 2.2:

Returns: The width of screen in pixels.

int Gdk::Screen::get_width_mm ( ) const

Gets the width of screen in millimeters.

Note that on some X servers this value will not be correct.

Since gtkmm 2.2:

Returns: The width of screen in millimeters.

Glib::ListHandle< Glib::RefPtr<Window> > Gdk::Screen::get_window_stack ( )

Returns a List of Gdk::Windows representing the current window stack.

On X11, this is done by inspecting the _NET_CLIENT_LIST_STACKING property on the root window, as described in the Extended Window Manager Hints. If the window manager does not support the _NET_CLIENT_LIST_STACKING hint, this function returns nullptr.

On other platforms, this function may return nullptr, depending on whether it is implementable on that platform.

Since gtkmm 2.10:

Returns: A list of Gdk::Windows for the current window stack, or nullptr.

GdkScreen* Gdk::Screen::gobj ( )

inline

Provides access to the underlying C GObject.

const GdkScreen* Gdk::Screen::gobj ( ) const

inline

Provides access to the underlying C GObject.

GdkScreen* Gdk::Screen::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::Screen::is_composited ( ) const

Returns whether windows with an RGBA visual can reasonably be expected to have their alpha channel drawn correctly on the screen.

On X11 this function returns whether a compositing manager is compositing screen.

Since gtkmm 2.10:

Returns: Whether windows with RGBA visuals can reasonably be expected to have their alpha channels drawn correctly on the screen.

Glib::ListHandle< Glib::RefPtr<Visual> > Gdk::Screen::list_visuals ( )

Lists the available visuals for the specified screen.

A visual describes a hardware image data format. For example, a visual might support 24-bit color, or 8-bit color, and might expect pixels to be in a certain format.

Since gtkmm 2.2:

Returns: A list of visuals.

Glib::ustring Gdk::Screen::make_display_name ( )

Determines the name to pass to Gdk::Display::open() to get a Gdk::Display with this screen as the default screen.

Since gtkmm 2.2:

Returns: The name.

virtual void Gdk::Screen::on_size_changed ( )

protectedvirtual

This is a default handler for the signal signal_size_changed().

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

noexcept

Glib::PropertyProxy< Cairo::FontOptions > Gdk::Screen::property_font_options ( )

The default font options for the screen.

Returns: A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< Cairo::FontOptions > Gdk::Screen::property_font_options ( ) const

The default font options for the screen.

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy< double > Gdk::Screen::property_resolution ( )

The resolution for fonts on the screen.

Returns: A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< double > Gdk::Screen::property_resolution ( ) const

The resolution for fonts on the screen.

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

void Gdk::Screen::set_default_colormap ( const Glib::RefPtr< const Colormap >& colormap )

Sets the default colormap for screen.

Since gtkmm 2.2:

Parameters

colormap A Gdk::Colormap.

void Gdk::Screen::set_font_options ( const Cairo::FontOptions & options )

Sets the default font options for the screen.

These options will be set on any Pango::Context's newly created with gdk_pango_context_get_for_screen(). Changing the default set of font options does not affect contexts that have already been created.

Since gtkmm 2.10:

Parameters

options A #cairo_font_options_t, or nullptr to unset any previously set default font options.

void Gdk::Screen::set_resolution ( double dpi )

Sets the resolution for font handling on the screen.

This is a scale factor between points specified in a Pango::FontDescription and cairo units. The default value is 96, meaning that a 10 point font will be 13 units high. (10 * 96. / 72. = 13.3).

Since gtkmm 2.10:

Parameters

dpi	The resolution in "dots per inch". (Physical inches aren't actually involved; the terminology is conventional.).

Glib::SignalProxy< void > Gdk::Screen::signal_composited_changed ( )

Slot Prototype:: void on_my_composited_changed()

Glib::SignalProxy< void > Gdk::Screen::signal_monitors_changed ( )

Slot Prototype:: void on_my_monitors_changed()

Glib::SignalProxy< void > Gdk::Screen::signal_size_changed ( )

The size_changed signal is emitted when the pixel width or height of a screen changes.

Slot Prototype:: void on_my_size_changed()

Friends And Related Function Documentation

Glib::RefPtr< Gdk::Screen > wrap	(	GdkScreen *	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.

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

gdkmm/screen.h

gtkmm: Gdk::Screen 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