gtkmm  3.97.1
Public Member Functions | Static Public Member Functions | Protected Member Functions | Related Functions | List of all members
Gtk::IconTheme Class Reference

Looking up icons by name. More...

#include <gtkmm/icontheme.h>

Inheritance diagram for Gtk::IconTheme:
Inheritance graph
[legend]

Public Member Functions

 IconTheme (IconTheme&& src) noexcept
 
IconThemeoperator= (IconTheme&& src) noexcept
 
 ~IconTheme () noexcept override
 
GtkIconTheme* gobj ()
 Provides access to the underlying C GObject. More...
 
const GtkIconTheme* gobj () const
 Provides access to the underlying C GObject. More...
 
GtkIconTheme* gobj_copy ()
 Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
 
void set_display (const Glib::RefPtr< Gdk::Display >& display)
 Sets the display for an icon theme; the display is used to track the user’s currently configured icon theme, which might be different for different displays. More...
 
void set_search_path (const std::vector< Glib::ustring >& path)
 
std::vector< Glib::ustringget_search_path () const
 
void append_search_path (const Glib::ustring& path)
 Appends a directory to the search path. More...
 
void prepend_search_path (const Glib::ustring& path)
 Prepends a directory to the search path. More...
 
void add_resource_path (const std::string& path)
 Adds a resource path that will be looked at when looking for icons, similar to search paths. More...
 
void set_custom_theme (const Glib::ustring& theme_name)
 Sets the name of the icon theme that the Gtk::IconTheme object uses overriding system configuration. More...
 
bool has_icon (const Glib::ustring& icon_name) const
 Checks whether an icon theme includes an icon for a particular name. More...
 
std::vector< int > get_icon_sizes (const Glib::ustring& icon_name) const
 Returns an array of integers describing the sizes at which the icon is available without scaling. More...
 
Glib::RefPtr< IconPaintablelookup_icon (const Glib::ustring& icon_name, const std::vector< Glib::ustring >& fallbacks, int size, int scale=1, TextDirection direction=TextDirection::NONE, IconLookupFlags flags=(IconLookupFlags) 0)
 Looks up a named icon for a desired size and window scale, returning a Gtk::Icon. More...
 
Glib::RefPtr< IconPaintablelookup_icon (const Glib::ustring& icon_name, int size, int scale=1, TextDirection direction=TextDirection::NONE, IconLookupFlags flags=(IconLookupFlags) 0)
 A lookup_icon() convenience overload. More...
 
Glib::RefPtr< const IconPaintablelookup_icon (const Glib::ustring& icon_name, const std::vector< Glib::ustring >& fallbacks, int size, int scale=1, TextDirection direction=TextDirection::NONE, IconLookupFlags flags=(IconLookupFlags) 0) const
 Looks up a named icon for a desired size and window scale, returning a Gtk::Icon. More...
 
Glib::RefPtr< const IconPaintablelookup_icon (const Glib::ustring& icon_name, int size, int scale=1, TextDirection direction=TextDirection::NONE, IconLookupFlags flags=(IconLookupFlags) 0) const
 A lookup_icon() convenience overload. More...
 
Glib::RefPtr< IconPaintablelookup_icon (const Glib::RefPtr< const Gio::Icon >& icon, int size, int scale=1, TextDirection direction=TextDirection::NONE, IconLookupFlags flags=(IconLookupFlags) 0)
 Looks up a icon for a desired size and window scale, returning a Gtk::Icon. More...
 
Glib::RefPtr< const IconPaintablelookup_icon (const Glib::RefPtr< const Gio::Icon >& icon, int size, int scale=1, TextDirection direction=TextDirection::NONE, IconLookupFlags flags=(IconLookupFlags) 0) const
 Looks up a icon for a desired size and window scale, returning a Gtk::Icon. More...
 
std::vector< Glib::ustringlist_icons () const
 Lists the icons in the current icon theme. More...
 
Glib::SignalProxy< void()> signal_changed ()
 
- 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
 

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< IconThemecreate ()
 
static Glib::RefPtr< IconThemeget_for_display (const Glib::RefPtr< Gdk::Display >& display)
 Gets the icon theme object associated with display; if this function has not previously been called for the given display, a new icon theme object will be created and associated with the display. More...
 

Protected Member Functions

 IconTheme ()
 
- Protected Member Functions inherited from Glib::Object
 Object ()
 
 Object (const Glib::ConstructParams &construct_params)
 
 Object (GObject *castitem)
 
 ~Object () noexcept override
 
- 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)
 

Related Functions

(Note that these are not member functions.)

Glib::RefPtr< Gtk::IconThemewrap (GtkIconTheme* 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)
 

Detailed Description

Looking up icons by name.

Gtk::IconTheme provides a facility for looking up icons by name and size. The main reason for using a name rather than simply providing a filename is to allow different icons to be used depending on what “icon theme” is selected by the user. The operation of icon themes on Linux and Unix follows the IconPaintable Theme Specification. There is a fallback icon theme, named hicolor, where applications should install their icons, but additional icon themes can be installed as operating system vendors and users choose.

In many cases, named themes are used indirectly, via Gtk::Image rather than directly, but looking up icons directly is also simple. The Gtk::IconTheme object acts as a database of all the icons in the current theme. You can create new Gtk::IconTheme objects, but it’s much more efficient to use the standard icon theme for the Gdk::Display so that the icon information is shared with other people looking up icons. Use get_for_display().

Constructor & Destructor Documentation

◆ IconTheme() [1/2]

Gtk::IconTheme::IconTheme ( IconTheme&&  src)
noexcept

◆ ~IconTheme()

Gtk::IconTheme::~IconTheme ( )
overridenoexcept

◆ IconTheme() [2/2]

Gtk::IconTheme::IconTheme ( )
protected

Member Function Documentation

◆ add_resource_path()

void Gtk::IconTheme::add_resource_path ( const std::string path)

Adds a resource path that will be looked at when looking for icons, similar to search paths.

This function should be used to make application-specific icons available as part of the icon theme.

The resources are considered as part of the hicolor icon theme and must be located in subdirectories that are defined in the hicolor icon theme, such as @a path/16x16/actions/run.png. Icons that are directly placed in the resource path instead of a subdirectory are also considered as ultimate fallback.

Parameters
pathA resource path.

◆ append_search_path()

void Gtk::IconTheme::append_search_path ( const Glib::ustring path)

Appends a directory to the search path.

See set_search_path().

Parameters
pathDirectory name to append to the icon path.

◆ create()

static Glib::RefPtr<IconTheme> Gtk::IconTheme::create ( )
static

◆ get_for_display()

static Glib::RefPtr<IconTheme> Gtk::IconTheme::get_for_display ( const Glib::RefPtr< Gdk::Display >&  display)
static

Gets the icon theme object associated with display; if this function has not previously been called for the given display, a new icon theme object will be created and associated with the display.

Icon theme objects are fairly expensive to create, so using this function is usually a better choice than calling than new() and setting the display yourself; by using this function a single icon theme object will be shared between users.

Parameters
displayA Gdk::Display.
Returns
A unique Gtk::IconTheme associated with the given display. This icon theme is associated with the display and can be used as long as the display is open. Do not ref or unref it.

◆ get_icon_sizes()

std::vector<int> Gtk::IconTheme::get_icon_sizes ( const Glib::ustring icon_name) const

Returns an array of integers describing the sizes at which the icon is available without scaling.

A size of -1 means that the icon is available in a scalable format. The array is zero-terminated.

Parameters
icon_nameThe name of an icon.
Returns
A newly allocated array describing the sizes at which the icon is available.

◆ get_search_path()

std::vector<Glib::ustring> Gtk::IconTheme::get_search_path ( ) const

◆ get_type()

static GType Gtk::IconTheme::get_type ( )
static

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

◆ gobj() [1/2]

GtkIconTheme* Gtk::IconTheme::gobj ( )
inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const GtkIconTheme* Gtk::IconTheme::gobj ( ) const
inline

Provides access to the underlying C GObject.

◆ gobj_copy()

GtkIconTheme* Gtk::IconTheme::gobj_copy ( )

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

◆ has_icon()

bool Gtk::IconTheme::has_icon ( const Glib::ustring icon_name) const

Checks whether an icon theme includes an icon for a particular name.

Parameters
icon_nameThe name of an icon.
Returns
true if self includes an icon for icon_name.

◆ list_icons()

std::vector<Glib::ustring> Gtk::IconTheme::list_icons ( ) const

Lists the icons in the current icon theme.

Returns
A vector holding the names of all the icons in the theme.

◆ lookup_icon() [1/6]

Glib::RefPtr<IconPaintable> Gtk::IconTheme::lookup_icon ( const Glib::RefPtr< const Gio::Icon > &  icon,
int  size,
int  scale = 1,
TextDirection  direction = TextDirection::NONE,
IconLookupFlags  flags = (IconLookupFlags) 0 
)

Looks up a icon for a desired size and window scale, returning a Gtk::Icon.

The icon can then be rendered by using it as a Gdk::Paintable, or you can get information such as the filename and size.

Parameters
iconThe Gio::Icon to look up.
sizeDesired icon size.
scaleThe desired scale.
directionText direction the icon will be displayed in.
flagsFlags modifying the behavior of the icon lookup.
Returns
A Gtk::IconPaintable containing information about the icon. Unref with Glib::object_unref().

◆ lookup_icon() [2/6]

Glib::RefPtr<const IconPaintable> Gtk::IconTheme::lookup_icon ( const Glib::RefPtr< const Gio::Icon > &  icon,
int  size,
int  scale = 1,
TextDirection  direction = TextDirection::NONE,
IconLookupFlags  flags = (IconLookupFlags) 0 
) const

Looks up a icon for a desired size and window scale, returning a Gtk::Icon.

The icon can then be rendered by using it as a Gdk::Paintable, or you can get information such as the filename and size.

Parameters
iconThe Gio::Icon to look up.
sizeDesired icon size.
scaleThe desired scale.
directionText direction the icon will be displayed in.
flagsFlags modifying the behavior of the icon lookup.
Returns
A Gtk::IconPaintable containing information about the icon. Unref with Glib::object_unref().

◆ lookup_icon() [3/6]

Glib::RefPtr<IconPaintable> Gtk::IconTheme::lookup_icon ( const Glib::ustring icon_name,
const std::vector< Glib::ustring > &  fallbacks,
int  size,
int  scale = 1,
TextDirection  direction = TextDirection::NONE,
IconLookupFlags  flags = (IconLookupFlags) 0 
)

Looks up a named icon for a desired size and window scale, returning a Gtk::Icon.

The icon can then be rendered by using it as a Gdk::Paintable, or you can get information such as the filename and size.

If the available icon_name is not available and fallbacks are provided, they will be tried in order.

If no matching icon is found, then a paintable that renders the "missing icon" icon is returned. If you need to do something else for missing icons you need to use has_icon().

Note that you probably want to listen for icon theme changes and update the icon. This is usually done by overriding the Gtk::Widget::property_css_changed() function.

Parameters
icon_nameThe name of the icon to lookup.
sizeDesired icon size.
scaleThe window scale this will be displayed on.
directionText direction the icon will be displayed in.
flagsFlags modifying the behavior of the icon lookup.
Returns
A Gtk::IconPaintable object containing the icon.

◆ lookup_icon() [4/6]

Glib::RefPtr<const IconPaintable> Gtk::IconTheme::lookup_icon ( const Glib::ustring icon_name,
const std::vector< Glib::ustring > &  fallbacks,
int  size,
int  scale = 1,
TextDirection  direction = TextDirection::NONE,
IconLookupFlags  flags = (IconLookupFlags) 0 
) const

Looks up a named icon for a desired size and window scale, returning a Gtk::Icon.

The icon can then be rendered by using it as a Gdk::Paintable, or you can get information such as the filename and size.

If the available icon_name is not available and fallbacks are provided, they will be tried in order.

If no matching icon is found, then a paintable that renders the "missing icon" icon is returned. If you need to do something else for missing icons you need to use has_icon().

Note that you probably want to listen for icon theme changes and update the icon. This is usually done by overriding the Gtk::Widget::property_css_changed() function.

Parameters
icon_nameThe name of the icon to lookup.
sizeDesired icon size.
scaleThe window scale this will be displayed on.
directionText direction the icon will be displayed in.
flagsFlags modifying the behavior of the icon lookup.
Returns
A Gtk::IconPaintable object containing the icon.

◆ lookup_icon() [5/6]

Glib::RefPtr<IconPaintable> Gtk::IconTheme::lookup_icon ( const Glib::ustring icon_name,
int  size,
int  scale = 1,
TextDirection  direction = TextDirection::NONE,
IconLookupFlags  flags = (IconLookupFlags) 0 
)

A lookup_icon() convenience overload.

◆ lookup_icon() [6/6]

Glib::RefPtr<const IconPaintable> Gtk::IconTheme::lookup_icon ( const Glib::ustring icon_name,
int  size,
int  scale = 1,
TextDirection  direction = TextDirection::NONE,
IconLookupFlags  flags = (IconLookupFlags) 0 
) const

A lookup_icon() convenience overload.

◆ operator=()

IconTheme& Gtk::IconTheme::operator= ( IconTheme&&  src)
noexcept

◆ prepend_search_path()

void Gtk::IconTheme::prepend_search_path ( const Glib::ustring path)

Prepends a directory to the search path.

See set_search_path().

Parameters
pathDirectory name to prepend to the icon path.

◆ set_custom_theme()

void Gtk::IconTheme::set_custom_theme ( const Glib::ustring theme_name)

Sets the name of the icon theme that the Gtk::IconTheme object uses overriding system configuration.

This function cannot be called on the icon theme objects returned from get_for_display().

Parameters
theme_nameName of icon theme to use instead of configured theme, or nullptr to unset a previously set custom theme.

◆ set_display()

void Gtk::IconTheme::set_display ( const Glib::RefPtr< Gdk::Display >&  display)

Sets the display for an icon theme; the display is used to track the user’s currently configured icon theme, which might be different for different displays.

Parameters
displayA Gdk::Display.

◆ set_search_path()

void Gtk::IconTheme::set_search_path ( const std::vector< Glib::ustring > &  path)

◆ signal_changed()

Glib::SignalProxy<void()> Gtk::IconTheme::signal_changed ( )
Slot Prototype:
void on_my_changed()

Flags: Run Last

Emitted when the current icon theme is switched or GTK+ detects that a change has occurred in the contents of the current icon theme.

Friends And Related Function Documentation

◆ wrap()

Glib::RefPtr< Gtk::IconTheme > wrap ( GtkIconTheme *  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.