gtkmm  3.91.2
Public Member Functions | Static Public Member Functions | Related Functions | List of all members
Gdk::Screen Class Reference

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

#include <gdkmm/screen.h>

Inheritance diagram for Gdk::Screen:
Inheritance graph
[legend]

Public Member Functions

 Screen (Screen&& src) noexcept
 
Screenoperator= (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< Displayget_display ()
 Gets the display to which the screen belongs. More...
 
Glib::RefPtr< const Displayget_display () const
 Gets the display to which the screen belongs. More...
 
std::vector< Glib::RefPtr< Window > > get_toplevel_windows ()
 Obtains a list of all toplevel windows known to GDK on the screen screen. More...
 
template<class ValueType >
bool get_setting (const Glib::ustring& name, ValueType& value) const
 
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::SignalProxy< void()> signal_monitors_changed ()
 
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
 
Objectoperator= (const Object &)=delete
 
 Object (Object &&src) noexcept
 
Objectoperator= (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::Objectwrap (GObject *object, bool take_copy=false)
 
- Public Member Functions inherited from Glib::ObjectBase
 ObjectBase (const ObjectBase &)=delete
 
ObjectBaseoperator= (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
 
PropertyType get_property (const Glib::ustring &property_name) const
 
sigc::connection connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void()> &slot)
 
sigc::connection connect_property_changed (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 ()
 
trackableoperator= (const trackable &src)
 
trackableoperator= (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< Screenget_default ()
 Gets the default screen for the default display. More...
 

Related Functions

(Note that these are not member functions.)

Glib::RefPtr< Gdk::Screenwrap (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
 
- 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
 
ObjectBaseoperator= (ObjectBase &&src) noexcept
 
virtual ~ObjectBase () noexcept=0
 
void initialize (GObject *castitem)
 
void initialize_move (GObject *castitem, Glib::ObjectBase *previous_wrapper)
 

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 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

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<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.
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.
template <class ValueType >
bool Gdk::Screen::get_setting ( const Glib::ustring name,
ValueType &  value 
) const
std::vector< 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.

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.

Screen& Gdk::Screen::operator= ( Screen&&  src)
noexcept
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_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
dpiThe resolution in “dots per inch”. (Physical inches aren’t actually involved; the terminology is conventional.).
Glib::SignalProxy<void()> Gdk::Screen::signal_monitors_changed ( )
Slot Prototype:
void on_my_monitors_changed()

The signal_monitors_changed() signal is emitted when the number, size or position of the monitors attached to the screen change.

Only for X11 and OS X for now. A future implementation for Win32 may be a possibility.

Since gtkmm 2.14:

Friends And Related Function Documentation

Glib::RefPtr< Gdk::Screen > wrap ( GdkScreen *  object,
bool  take_copy = false 
)
related

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

Parameters
objectThe C instance.
take_copyFalse 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.