## GtkIconTheme

GtkIconTheme — Looking up icons by name

## Functions

GtkIconTheme * | gtk_icon_theme_new ()
GtkIconTheme * | gtk_icon_theme_get_default ()
GtkIconTheme * | gtk_icon_theme_get_for_screen ()
void | gtk_icon_theme_set_screen ()
void | gtk_icon_theme_set_custom_theme ()
gboolean | gtk_icon_theme_has_icon ()
GtkIconInfo * | gtk_icon_theme_lookup_icon ()
GtkIconInfo * | gtk_icon_theme_choose_icon ()
GtkIconInfo * | gtk_icon_theme_lookup_by_gicon ()
GdkPixbuf * | gtk_icon_theme_load_icon ()
GList * | gtk_icon_theme_list_contexts ()
GList * | gtk_icon_theme_list_icons ()
gint * | gtk_icon_theme_get_icon_sizes ()
char * | gtk_icon_theme_get_example_icon_name ()
gboolean | gtk_icon_theme_rescan_if_needed ()
void | gtk_icon_theme_add_builtin_icon ()
GtkIconInfo * | gtk_icon_info_copy ()
void | gtk_icon_info_free ()
GtkIconInfo * | gtk_icon_info_new_for_pixbuf ()
gint | gtk_icon_info_get_base_size ()
GdkPixbuf * | gtk_icon_info_get_builtin_pixbuf ()
GdkPixbuf * | gtk_icon_info_load_icon ()
void | gtk_icon_info_set_raw_coordinates ()
gboolean | gtk_icon_info_get_embedded_rect ()
gboolean | gtk_icon_info_get_attach_points ()
const gchar * | gtk_icon_info_get_display_name ()

## Signals

void | changed | Run Last

## Types and Values

| GtkIconInfo
struct | GtkIconTheme
enum | GtkIconLookupFlags
#define | GTK_ICON_THEME_ERROR
enum | GtkIconThemeError
#define | gtk_icon_theme_set_search_path
#define | gtk_icon_theme_get_search_path
#define | gtk_icon_theme_append_search_path
#define | gtk_icon_theme_prepend_search_path
#define | gtk_icon_info_get_filename

## Object Hierarchy

        GObject
        ╰── GtkIconTheme

## Includes

    #include <gtk/gtk.h>

## Description

GtkIconTheme 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 Icon Theme Specification. There is a default icon theme, named `hicolor` where applications should install their icons, but more additional application themes can be installed as operating system vendors and users choose.

Named icons are similar to the ??? facility, and the distinction between the two may be a bit confusing. A few things to keep in mind:

- Stock images usually are used in conjunction with ???., such as `GTK_STOCK_OK` or `GTK_STOCK_OPEN`. Named icons are easier to set up and therefore are more useful for new icons that an application wants to add, such as application icons or window icons.

- Stock images can only be loaded at the symbolic sizes defined by the GtkIconSize enumeration, or by custom sizes defined by `gtk_icon_size_register()`, while named icons are more flexible and any pixel size can be specified.

- Because stock images are closely tied to stock items, and thus to actions in the user interface, stock images may come in multiple variants for different widget states or writing directions.

A good rule of thumb is that if there is a stock image for what you want to use, use it, otherwise use a named icon. It turns out that internally stock images are generally defined in terms of one or more named icons. (An example of the more than one case is icons that depend on writing direction; GTK_STOCK_GO_FORWARD uses the two themed icons "gtk-stock-go-forward-ltr" and "gtk-stock-go-forward-rtl".)

In many cases, named themes are used indirectly, via GtkImage or stock items, rather than directly, but looking up icons directly is also simple. The GtkIconTheme object acts as a database of all the icons in the current theme. You can create new GtkIconTheme objects, but its much more efficient to use the standard icon theme for the GdkScreen so that the icon information is shared with other people looking up icons. In the case where the default screen is being used, looking up an icon can be as simple as:

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    GError *error = NULL;
    GtkIconTheme *icon_theme;
    GdkPixbuf *pixbuf;
    icon_theme = gtk_icon_theme_get_default ();
    pixbuf = gtk_icon_theme_load_icon (icon_theme,
                                       "my-icon-name", /* icon name */
                                       48, /* size */
                                       0,  /* flags */
                                       &error);
    if (!pixbuf)
      {
        g_warning ("Couldn't load icon: %s", error->message);
        g_error_free (error);
      }
    else
      {
        /* Use the pixbuf */
        g_object_unref (pixbuf);
      }

## 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 | (array length=n_points) (out): location to store pointer to an array of points, or `NULL` free the array of points with `g_free()`. | [allow-none]
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;

Contains information found when looking up an icon in an icon theme.

### struct GtkIconTheme

    struct GtkIconTheme;

Acts as a database of information about an icon theme. Normally, you retrieve the icon theme for a particular screen using `gtk_icon_theme_get_for_screen()` and it will contain information about current icon theme for that screen, but you can also create a new GtkIconTheme object and set the icon theme name explicitely using `gtk_icon_theme_set_custom_theme()`.

### 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 ()

The GQuark used for GtkIconThemeError errors.

### 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 | (array length=n_elements) (out): location to store a list of icon theme path directories or `NULL` The stored value should be freed with `g_strfreev()`. | [allow-none]
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()`.

#### 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