GtkIconTheme

GtkIconTheme

Functions

Signals

void changed Run Last

Types and Values

Object Hierarchy

    GObject
    ╰── GtkIconTheme

Includes

#include <gtk/gtk.h>

Description

Functions

gtk_icon_theme_new ()

GtkIconTheme *
gtk_icon_theme_new (void);

Creates a new icon theme object. Icon theme objects are used to lookup up an icon by name in a particular icon theme. Usually, you'll want to use gtk_icon_theme_get_default() or gtk_icon_theme_get_for_screen() rather than creating a new icon theme object for scratch.

Returns

the newly created GtkIconTheme object.

Since: 2.4


gtk_icon_theme_get_default ()

GtkIconTheme *
gtk_icon_theme_get_default (void);

Gets the icon theme for the default screen. See gtk_icon_theme_get_for_screen().

Returns

A unique GtkIconTheme associated with the default screen. This icon theme is associated with the screen and can be used as long as the screen is open. Do not ref or unref it.

[transfer none]

Since: 2.4


gtk_icon_theme_get_for_screen ()

GtkIconTheme *
gtk_icon_theme_get_for_screen (GdkScreen *screen);

Gets the icon theme object associated with screen ; if this function has not previously been called for the given screen, a new icon theme object will be created and associated with the screen. Icon theme objects are fairly expensive to create, so using this function is usually a better choice than calling than gtk_icon_theme_new() and setting the screen yourself; by using this function a single icon theme object will be shared between users.

Parameters

screen

a GdkScreen

 

Returns

A unique GtkIconTheme associated with the given screen. This icon theme is associated with the screen and can be used as long as the screen is open. Do not ref or unref it.

[transfer none]

Since: 2.4


gtk_icon_theme_set_screen ()

void
gtk_icon_theme_set_screen (GtkIconTheme *icon_theme,
                           GdkScreen *screen);

Sets the screen for an icon theme; the screen is used to track the user's currently configured icon theme, which might be different for different screens.

Parameters

icon_theme

a GtkIconTheme

 

screen

a GdkScreen

 

Since: 2.4


gtk_icon_theme_set_custom_theme ()

void
gtk_icon_theme_set_custom_theme (GtkIconTheme *icon_theme,
                                 const gchar *theme_name);

Sets the name of the icon theme that the GtkIconTheme object uses overriding system configuration. This function cannot be called on the icon theme objects returned from gtk_icon_theme_get_default() and gtk_icon_theme_get_for_screen().

Parameters

icon_theme

a GtkIconTheme

 

theme_name

name of icon theme to use instead of configured theme, or NULL to unset a previously set custom theme

 

Since: 2.4


gtk_icon_theme_has_icon ()

gboolean
gtk_icon_theme_has_icon (GtkIconTheme *icon_theme,
                         const gchar *icon_name);

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

Parameters

icon_theme

a GtkIconTheme

 

icon_name

the name of an icon

 

Returns

TRUE if icon_theme includes an icon for icon_name .

Since: 2.4


gtk_icon_theme_lookup_icon ()

GtkIconInfo *
gtk_icon_theme_lookup_icon (GtkIconTheme *icon_theme,
                            const gchar *icon_name,
                            gint size,
                            GtkIconLookupFlags flags);

Looks up a named icon and returns a structure containing information such as the filename of the icon. The icon can then be rendered into a pixbuf using gtk_icon_info_load_icon(). (gtk_icon_theme_load_icon() combines these two steps if all you need is the pixbuf.)

Parameters

icon_theme

a GtkIconTheme

 

icon_name

the name of the icon to lookup

 

size

desired icon size

 

flags

flags modifying the behavior of the icon lookup

 

Returns

a GtkIconInfo structure containing information about the icon, or NULL if the icon wasn't found. Free with gtk_icon_info_free()

Since: 2.4


gtk_icon_theme_choose_icon ()

GtkIconInfo *
gtk_icon_theme_choose_icon (GtkIconTheme *icon_theme,
                            const gchar *icon_names[],
                            gint size,
                            GtkIconLookupFlags flags);

Looks up a named icon and returns a structure containing information such as the filename of the icon. The icon can then be rendered into a pixbuf using gtk_icon_info_load_icon(). (gtk_icon_theme_load_icon() combines these two steps if all you need is the pixbuf.)

If icon_names contains more than one name, this function tries them all in the given order before falling back to inherited icon themes.

Parameters

icon_theme

a GtkIconTheme

 

icon_names

NULL-terminated array of icon names to lookup.

[array zero-terminated=1]

size

desired icon size

 

flags

flags modifying the behavior of the icon lookup

 

Returns

a GtkIconInfo structure containing information about the icon, or NULL if the icon wasn't found. Free with gtk_icon_info_free()

Since: 2.12


gtk_icon_theme_lookup_by_gicon ()

GtkIconInfo *
gtk_icon_theme_lookup_by_gicon (GtkIconTheme *icon_theme,
                                GIcon *icon,
                                gint size,
                                GtkIconLookupFlags flags);

Looks up an icon and returns a structure containing information such as the filename of the icon. The icon can then be rendered into a pixbuf using gtk_icon_info_load_icon().

Parameters

icon_theme

a GtkIconTheme

 

icon

the GIcon to look up

 

size

desired icon size

 

flags

flags modifying the behavior of the icon lookup

 

Returns

a GtkIconInfo structure containing information about the icon, or NULL if the icon wasn't found. Free with gtk_icon_info_free()

Since: 2.14


gtk_icon_theme_load_icon ()

GdkPixbuf *
gtk_icon_theme_load_icon (GtkIconTheme *icon_theme,
                          const gchar *icon_name,
                          gint size,
                          GtkIconLookupFlags flags,
                          GError **error);

Looks up an icon in an icon theme, scales it to the given size and renders it into a pixbuf. This is a convenience function; if more details about the icon are needed, use gtk_icon_theme_lookup_icon() followed by gtk_icon_info_load_icon().

Note that you probably want to listen for icon theme changes and update the icon. This is usually done by connecting to the GtkWidget::style-set signal. If for some reason you do not want to update the icon when the icon theme changes, you should consider using gdk_pixbuf_copy() to make a private copy of the pixbuf returned by this function. Otherwise GTK+ may need to keep the old icon theme loaded, which would be a waste of memory.

Parameters

icon_theme

a GtkIconTheme

 

icon_name

the name of the icon to lookup

 

size

the desired icon size. The resulting icon may not be exactly this size; see gtk_icon_info_load_icon().

 

flags

flags modifying the behavior of the icon lookup

 

error

Location to store error information on failure, or NULL.

[allow-none]

Returns

the rendered icon; this may be a newly created icon or a new reference to an internal icon, so you must not modify the icon. Use g_object_unref() to release your reference to the icon. NULL if the icon isn't found.

[transfer full]

Since: 2.4


gtk_icon_theme_list_contexts ()

GList *
gtk_icon_theme_list_contexts (GtkIconTheme *icon_theme);

Gets the list of contexts available within the current hierarchy of icon themes

Parameters

icon_theme

a GtkIconTheme

 

Returns

a GList list holding the names of all the contexts in the theme. You must first free each element in the list with g_free(), then free the list itself with g_list_free().

[element-type utf8][transfer full]

Since: 2.12


gtk_icon_theme_list_icons ()

GList *
gtk_icon_theme_list_icons (GtkIconTheme *icon_theme,
                           const gchar *context);

Lists the icons in the current icon theme. Only a subset of the icons can be listed by providing a context string. The set of values for the context string is system dependent, but will typically include such values as "Applications" and "MimeTypes".

Parameters

icon_theme

a GtkIconTheme

 

context

a string identifying a particular type of icon, or NULL to list all icons.

 

Returns

a GList list holding the names of all the icons in the theme. You must first free each element in the list with g_free(), then free the list itself with g_list_free().

[element-type utf8][transfer full]

Since: 2.4


gtk_icon_theme_get_icon_sizes ()

gint *
gtk_icon_theme_get_icon_sizes (GtkIconTheme *icon_theme,
                               const gchar *icon_name);

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_theme

a GtkIconTheme

 

icon_name

the name of an icon

 

Returns

An newly allocated array describing the sizes at which the icon is available. The array should be freed with g_free() when it is no longer needed.

[array zero-terminated=1]

Since: 2.6


gtk_icon_theme_get_example_icon_name ()

char *
gtk_icon_theme_get_example_icon_name (GtkIconTheme *icon_theme);

Gets the name of an icon that is representative of the current theme (for instance, to use when presenting a list of themes to the user.)

Parameters

icon_theme

a GtkIconTheme

 

Returns

the name of an example icon or NULL. Free with g_free().

Since: 2.4


gtk_icon_theme_rescan_if_needed ()

gboolean
gtk_icon_theme_rescan_if_needed (GtkIconTheme *icon_theme);

Checks to see if the icon theme has changed; if it has, any currently cached information is discarded and will be reloaded next time icon_theme is accessed.

Parameters

icon_theme

a GtkIconTheme

 

Returns

TRUE if the icon theme has changed and needed to be reloaded.

Since: 2.4


gtk_icon_theme_add_builtin_icon ()

void
gtk_icon_theme_add_builtin_icon (const gchar *icon_name,
                                 gint size,
                                 GdkPixbuf *pixbuf);

Registers a built-in icon for icon theme lookups. The idea of built-in icons is to allow an application or library that uses themed icons to function requiring files to be present in the file system. For instance, the default images for all of GTK+'s stock icons are registered as built-icons.

In general, if you use gtk_icon_theme_add_builtin_icon() you should also install the icon in the icon theme, so that the icon is generally available.

This function will generally be used with pixbufs loaded via gdk_pixbuf_new_from_inline().

Parameters

icon_name

the name of the icon to register

 

size

the size at which to register the icon (different images can be registered for the same icon name at different sizes.)

 

pixbuf

GdkPixbuf that contains the image to use for icon_name .

 

Since: 2.4


gtk_icon_info_copy ()

GtkIconInfo *
gtk_icon_info_copy (GtkIconInfo *icon_info);

Make a copy of a GtkIconInfo.

Parameters

icon_info

a GtkIconInfo

 

Returns

the new GtkIconInfo

Since: 2.4


gtk_icon_info_free ()

void
gtk_icon_info_free (GtkIconInfo *icon_info);

Free a GtkIconInfo and associated information

Parameters

icon_info

a GtkIconInfo

 

Since: 2.4


gtk_icon_info_new_for_pixbuf ()

GtkIconInfo *
gtk_icon_info_new_for_pixbuf (GtkIconTheme *icon_theme,
                              GdkPixbuf *pixbuf);

Creates a GtkIconInfo for a GdkPixbuf.

Parameters

icon_theme

a GtkIconTheme

 

pixbuf

the pixbuf to wrap in a GtkIconInfo

 

Returns

a GtkIconInfo

Since: 2.14


gtk_icon_info_get_base_size ()

gint
gtk_icon_info_get_base_size (GtkIconInfo *icon_info);

Gets the base size for the icon. The base size is a size for the icon that was specified by the icon theme creator. This may be different than the actual size of image; an example of this is small emblem icons that can be attached to a larger icon. These icons will be given the same base size as the larger icons to which they are attached.

Parameters

icon_info

a GtkIconInfo

 

Returns

the base size, or 0, if no base size is known for the icon.

Since: 2.4


gtk_icon_info_get_builtin_pixbuf ()

GdkPixbuf *
gtk_icon_info_get_builtin_pixbuf (GtkIconInfo *icon_info);

Gets the built-in image for this icon, if any. To allow GTK+ to use built in icon images, you must pass the GTK_ICON_LOOKUP_USE_BUILTIN to gtk_icon_theme_lookup_icon().

Parameters

icon_info

a GtkIconInfo structure

 

Returns

the built-in image pixbuf, or NULL. No extra reference is added to the returned pixbuf, so if you want to keep it around, you must use g_object_ref(). The returned image must not be modified.

[transfer none]

Since: 2.4


gtk_icon_info_load_icon ()

GdkPixbuf *
gtk_icon_info_load_icon (GtkIconInfo *icon_info,
                         GError **error);

Renders an icon previously looked up in an icon theme using gtk_icon_theme_lookup_icon(); the size will be based on the size passed to gtk_icon_theme_lookup_icon(). Note that the resulting pixbuf may not be exactly this size; an icon theme may have icons that differ slightly from their nominal sizes, and in addition GTK+ will avoid scaling icons that it considers sufficiently close to the requested size or for which the source image would have to be scaled up too far. (This maintains sharpness.). This behaviour can be changed by passing the GTK_ICON_LOOKUP_FORCE_SIZE flag when obtaining the GtkIconInfo. If this flag has been specified, the pixbuf returned by this function will be scaled to the exact size.

Parameters

icon_info

a GtkIconInfo structure from gtk_icon_theme_lookup_icon()

 

error

location to store error information on failure, or NULL.

[allow-none]

Returns

the rendered icon; this may be a newly created icon or a new reference to an internal icon, so you must not modify the icon. Use g_object_unref() to release your reference to the icon.

[transfer full]

Since: 2.4


gtk_icon_info_set_raw_coordinates ()

void
gtk_icon_info_set_raw_coordinates (GtkIconInfo *icon_info,
                                   gboolean raw_coordinates);

Sets whether the coordinates returned by gtk_icon_info_get_embedded_rect() and gtk_icon_info_get_attach_points() should be returned in their original form as specified in the icon theme, instead of scaled appropriately for the pixbuf returned by gtk_icon_info_load_icon().

Raw coordinates are somewhat strange; they are specified to be with respect to the unscaled pixmap for PNG and XPM icons, but for SVG icons, they are in a 1000x1000 coordinate space that is scaled to the final size of the icon. You can determine if the icon is an SVG icon by using gtk_icon_info_get_filename(), and seeing if it is non-NULL and ends in '.svg'.

This function is provided primarily to allow compatibility wrappers for older API's, and is not expected to be useful for applications.

Parameters

icon_info

a GtkIconInfo

 

raw_coordinates

whether the coordinates of embedded rectangles and attached points should be returned in their original (unscaled) form.

 

Since: 2.4


gtk_icon_info_get_embedded_rect ()

gboolean
gtk_icon_info_get_embedded_rect (GtkIconInfo *icon_info,
                                 GdkRectangle *rectangle);

Gets the coordinates of a rectangle within the icon that can be used for display of information such as a preview of the contents of a text file. See gtk_icon_info_set_raw_coordinates() for further information about the coordinate system.

Parameters

icon_info

a GtkIconInfo

 

rectangle

GdkRectangle in which to store embedded rectangle coordinates; coordinates are only stored when this function returns TRUE.

[out]

Returns

TRUE if the icon has an embedded rectangle

Since: 2.4


gtk_icon_info_get_attach_points ()

gboolean
gtk_icon_info_get_attach_points (GtkIconInfo *icon_info,
                                 GdkPoint **points,
                                 gint *n_points);

Fetches the set of attach points for an icon. An attach point is a location in the icon that can be used as anchor points for attaching emblems or overlays to the icon.

Parameters

icon_info

a GtkIconInfo

 

points

location to store pointer to an array of points, or NULL free the array of points with g_free().

[allow-none][array length=n_points][out]

n_points

location to store the number of points in points , or NULL.

[allow-none]

Returns

TRUE if there are any attach points for the icon.

Since: 2.4


gtk_icon_info_get_display_name ()

const gchar *
gtk_icon_info_get_display_name (GtkIconInfo *icon_info);

Gets the display name for an icon. A display name is a string to be used in place of the icon name in a user visible context like a list of icons.

Parameters

icon_info

a GtkIconInfo

 

Returns

the display name for the icon or NULL, if the icon doesn't have a specified display name. This value is owned icon_info and must not be modified or free.

Since: 2.4

Types and Values

GtkIconInfo

typedef struct _GtkIconInfo GtkIconInfo;

struct GtkIconTheme

struct GtkIconTheme;

enum GtkIconLookupFlags

Used to specify options for gtk_icon_theme_lookup_icon()

Members

GTK_ICON_LOOKUP_NO_SVG

Never return SVG icons, even if gdk-pixbuf supports them. Cannot be used together with GTK_ICON_LOOKUP_FORCE_SVG.

 

GTK_ICON_LOOKUP_FORCE_SVG

Return SVG icons, even if gdk-pixbuf doesn't support them. Cannot be used together with GTK_ICON_LOOKUP_NO_SVG.

 

GTK_ICON_LOOKUP_USE_BUILTIN

When passed to gtk_icon_theme_lookup_icon() includes builtin icons as well as files. For a builtin icon, gtk_icon_info_get_filename() returns NULL and you need to call gtk_icon_info_get_builtin_pixbuf().

 

GTK_ICON_LOOKUP_GENERIC_FALLBACK

Try to shorten icon name at '-' characters before looking at inherited themes. For more general fallback, see gtk_icon_theme_choose_icon(). Since 2.12.

 

GTK_ICON_LOOKUP_FORCE_SIZE

Always return the icon scaled to the requested size. Since 2.14.

 

GTK_ICON_THEME_ERROR

#define GTK_ICON_THEME_ERROR gtk_icon_theme_error_quark ()

enum GtkIconThemeError

Error codes for GtkIconTheme operations.

Members

GTK_ICON_THEME_NOT_FOUND

The icon specified does not exist in the theme

 

GTK_ICON_THEME_FAILED

An unspecified error occurred.

 

gtk_icon_theme_set_search_path

#define gtk_icon_theme_set_search_path gtk_icon_theme_set_search_path_utf8

Sets the search path for the icon theme object. When looking for an icon theme, GTK+ will search for a subdirectory of one or more of the directories in path with the same name as the icon theme. (Themes from multiple of the path elements are combined to allow themes to be extended by adding icons in the user's home directory.)

In addition if an icon found isn't found either in the current icon theme or the default icon theme, and an image file with the right name is found directly in one of the elements of path , then that image will be used for the icon name. (This is legacy feature, and new icons should be put into the default icon theme, which is called DEFAULT_THEME_NAME, rather than directly on the icon path.)

Parameters

icon_theme

a GtkIconTheme

 

path

array of directories that are searched for icon themes.

[array length=n_elements][element-type filename]

n_elements

number of elements in path .

 

Since: 2.4


gtk_icon_theme_get_search_path

#define gtk_icon_theme_get_search_path gtk_icon_theme_get_search_path_utf8

Gets the current search path. See gtk_icon_theme_set_search_path().

Parameters

icon_theme

a GtkIconTheme

 

path

location to store a list of icon theme path directories or NULL The stored value should be freed with g_strfreev().

[allow-none][array length=n_elements][out]

n_elements

location to store number of elements in path , or NULL

 

Since: 2.4


gtk_icon_theme_append_search_path

#define gtk_icon_theme_append_search_path gtk_icon_theme_append_search_path_utf8

Appends a directory to the search path. See gtk_icon_theme_set_search_path().

Parameters

icon_theme

a GtkIconTheme

 

path

directory name to append to the icon path

 

Since: 2.4


gtk_icon_theme_prepend_search_path

#define gtk_icon_theme_prepend_search_path gtk_icon_theme_prepend_search_path_utf8

Prepends a directory to the search path. See gtk_icon_theme_set_search_path().

Parameters

icon_theme

a GtkIconTheme

 

path

directory name to prepend to the icon path

 

Since: 2.4


gtk_icon_info_get_filename

#define gtk_icon_info_get_filename gtk_icon_info_get_filename_utf8

Gets the filename for the icon. If the GTK_ICON_LOOKUP_USE_BUILTIN flag was passed to gtk_icon_theme_lookup_icon(), there may be no filename if a builtin icon is returned; in this case, you should use gtk_icon_info_get_builtin_pixbuf().

Parameters

icon_info

a GtkIconInfo

 

Returns

the filename for the icon, or NULL if gtk_icon_info_get_builtin_pixbuf() should be used instead. The return value is owned by GTK+ and should not be modified or freed.

Since: 2.4

Signal Details

The “changed” signal

void
user_function (GtkIconTheme *icon_theme,
               gpointer      user_data)

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

Parameters

icon_theme

the icon theme

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last