## GtkAboutDialog

GtkAboutDialog — Display information about an application

## Functions

GtkWidget * | gtk_about_dialog_new ()
const gchar * | gtk_about_dialog_get_program_name ()
void | gtk_about_dialog_set_program_name ()
const gchar * | gtk_about_dialog_get_version ()
void | gtk_about_dialog_set_version ()
const gchar * | gtk_about_dialog_get_copyright ()
void | gtk_about_dialog_set_copyright ()
const gchar * | gtk_about_dialog_get_comments ()
void | gtk_about_dialog_set_comments ()
const gchar * | gtk_about_dialog_get_license ()
void | gtk_about_dialog_set_license ()
gboolean | gtk_about_dialog_get_wrap_license ()
void | gtk_about_dialog_set_wrap_license ()
GtkLicense | gtk_about_dialog_get_license_type ()
void | gtk_about_dialog_set_license_type ()
const gchar * | gtk_about_dialog_get_website ()
void | gtk_about_dialog_set_website ()
const gchar * | gtk_about_dialog_get_website_label ()
void | gtk_about_dialog_set_website_label ()
const gchar * const * | gtk_about_dialog_get_authors ()
void | gtk_about_dialog_set_authors ()
const gchar * const * | gtk_about_dialog_get_artists ()
void | gtk_about_dialog_set_artists ()
const gchar * const * | gtk_about_dialog_get_documenters ()
void | gtk_about_dialog_set_documenters ()
const gchar * | gtk_about_dialog_get_translator_credits ()
void | gtk_about_dialog_set_translator_credits ()
GdkPixbuf * | gtk_about_dialog_get_logo ()
void | gtk_about_dialog_set_logo ()
const gchar * | gtk_about_dialog_get_logo_icon_name ()
void | gtk_about_dialog_set_logo_icon_name ()
void | gtk_about_dialog_add_credit_section ()
void | gtk_show_about_dialog ()

## Properties

GStrv | artists | Read / Write
GStrv | authors | Read / Write
gchar * | comments | Read / Write
gchar * | copyright | Read / Write
GStrv | documenters | Read / Write
gchar * | license | Read / Write
GtkLicense | license-type | Read / Write
GdkPixbuf * | logo | Read / Write
gchar * | logo-icon-name | Read / Write
gchar * | program-name | Read / Write
gchar * | translator-credits | Read / Write
gchar * | version | Read / Write
gchar * | website | Read / Write
gchar * | website-label | Read / Write
gboolean | wrap-license | Read / Write

## Signals

gboolean | activate-link | Run Last

## Types and Values

struct | GtkAboutDialog
enum | GtkLicense

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── GtkWidget
                ╰── GtkContainer
                    ╰── GtkBin
                        ╰── GtkWindow
                            ╰── GtkDialog
                                ╰── GtkAboutDialog

## Implemented Interfaces

GtkAboutDialog implements AtkImplementorIface and GtkBuildable.

## Includes

    #include <gtk/gtk.h>

## Description

The GtkAboutDialog offers a simple way to display information about a program like its logo, name, copyright, website and license. It is also possible to give credits to the authors, documenters, translators and artists who have worked on the program. An about dialog is typically opened when the user selects the `About` option from the `Help` menu. All parts of the dialog are optional.

About dialogs often contain links and email addresses. GtkAboutDialog displays these as clickable links. By default, it calls `gtk_show_uri_on_window()` when a user clicks one. The behaviour can be overridden with the “activate-link” signal.

To specify a person with an email address, use a string like "Edgar Allan Poe <edgar@poe.com>". To specify a website with a title, use a string like "GTK+ team http://www.gtk.org".

To make constructing a GtkAboutDialog as convenient as possible, you can use the function `gtk_show_about_dialog()` which constructs and shows a dialog and keeps it around so that it can be shown again.

Note that GTK+ sets a default title of `_("About %s")` on the dialog window (where %s is replaced by the name of the application, but in order to ensure proper translation of the title, applications should set the title property explicitly when constructing a GtkAboutDialog, as shown in the following example:

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    GdkPixbuf *example_logo = gdk_pixbuf_new_from_file ("./logo.png", NULL);
    gtk_show_about_dialog (NULL,
                           "program-name", "ExampleCode",
                           "logo", example_logo,
                           "title", _("About ExampleCode"),
                           NULL);

It is also possible to show a GtkAboutDialog like any other GtkDialog, e.g. using `gtk_dialog_run()`. In this case, you might need to know that the “Close” button returns the GTK_RESPONSE_CANCEL response id.

## Functions

### gtk_about_dialog_new ()

    GtkWidget *
    gtk_about_dialog_new (void);

Creates a new GtkAboutDialog.

#### Returns

a newly created GtkAboutDialog

Since: 2.6

### gtk_about_dialog_get_program_name ()

    const gchar *
    gtk_about_dialog_get_program_name (GtkAboutDialog *about);

Returns the program name displayed in the about dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The program name. The string is owned by the about dialog and must not be modified.

Since: 2.12

### gtk_about_dialog_set_program_name ()

    void
    gtk_about_dialog_set_program_name (GtkAboutDialog *about,
                                       const gchar *name);

Sets the name to display in the about dialog. If this is not set, it defaults to `g_get_application_name()`.

#### Parameters

about | a GtkAboutDialog |
name | the program name |

Since: 2.12

### gtk_about_dialog_get_version ()

    const gchar *
    gtk_about_dialog_get_version (GtkAboutDialog *about);

Returns the version string.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The version string. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_version ()

    void
    gtk_about_dialog_set_version (GtkAboutDialog *about,
                                  const gchar *version);

Sets the version string to display in the about dialog.

#### Parameters

about | a GtkAboutDialog |
version | the version string. | [allow-none]

Since: 2.6

### gtk_about_dialog_get_copyright ()

    const gchar *
    gtk_about_dialog_get_copyright (GtkAboutDialog *about);

Returns the copyright string.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The copyright string. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_copyright ()

    void
    gtk_about_dialog_set_copyright (GtkAboutDialog *about,
                                    const gchar *copyright);

Sets the copyright string to display in the about dialog. This should be a short string of one or two lines.

#### Parameters

about | a GtkAboutDialog |
copyright | the copyright string. | [allow-none]

Since: 2.6

### gtk_about_dialog_get_comments ()

    const gchar *
    gtk_about_dialog_get_comments (GtkAboutDialog *about);

Returns the comments string.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The comments. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_comments ()

    void
    gtk_about_dialog_set_comments (GtkAboutDialog *about,
                                   const gchar *comments);

Sets the comments string to display in the about dialog. This should be a short string of one or two lines.

#### Parameters

about | a GtkAboutDialog |
comments | a comments string. | [allow-none]

Since: 2.6

### gtk_about_dialog_get_license ()

    const gchar *
    gtk_about_dialog_get_license (GtkAboutDialog *about);

Returns the license information.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The license information. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_license ()

    void
    gtk_about_dialog_set_license (GtkAboutDialog *about,
                                  const gchar *license);

Sets the license information to be displayed in the secondary license dialog. If `license` is `NULL`, the license button is hidden.

#### Parameters

about | a GtkAboutDialog |
license | the license information or `NULL`. | [allow-none]

Since: 2.6

### gtk_about_dialog_get_wrap_license ()

    gboolean
    gtk_about_dialog_get_wrap_license (GtkAboutDialog *about);

Returns whether the license text in `about` is automatically wrapped.

#### Parameters

about | a GtkAboutDialog |

#### Returns

`TRUE` if the license text is wrapped

Since: 2.8

### gtk_about_dialog_set_wrap_license ()

    void
    gtk_about_dialog_set_wrap_license (GtkAboutDialog *about,
                                       gboolean wrap_license);

Sets whether the license text in `about` is automatically wrapped.

#### Parameters

about | a GtkAboutDialog |
wrap_license | whether to wrap the license |

Since: 2.8

### gtk_about_dialog_get_license_type ()

    GtkLicense
    gtk_about_dialog_get_license_type (GtkAboutDialog *about);

Retrieves the license set using `gtk_about_dialog_set_license_type()`

#### Parameters

about | a GtkAboutDialog |

#### Returns

a GtkLicense value

Since: 3.0

### gtk_about_dialog_set_license_type ()

    void
    gtk_about_dialog_set_license_type (GtkAboutDialog *about,
                                       GtkLicense license_type);

Sets the license of the application showing the `about` dialog from a list of known licenses.

This function overrides the license set using `gtk_about_dialog_set_license()`.

#### Parameters

about | a GtkAboutDialog |
license_type | the type of license |

Since: 3.0

### gtk_about_dialog_get_website ()

    const gchar *
    gtk_about_dialog_get_website (GtkAboutDialog *about);

Returns the website URL.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The website URL. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_website ()

    void
    gtk_about_dialog_set_website (GtkAboutDialog *about,
                                  const gchar *website);

Sets the URL to use for the website link.

#### Parameters

about | a GtkAboutDialog |
website | a URL string starting with "http://". | [allow-none]

Since: 2.6

### gtk_about_dialog_get_website_label ()

    const gchar *
    gtk_about_dialog_get_website_label (GtkAboutDialog *about);

Returns the label used for the website link.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The label used for the website link. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_website_label ()

    void
    gtk_about_dialog_set_website_label (GtkAboutDialog *about,
                                        const gchar *website_label);

Sets the label to be used for the website link.

#### Parameters

about | a GtkAboutDialog |
website_label | the label used for the website link |

Since: 2.6

### gtk_about_dialog_get_authors ()

    const gchar * const *
    gtk_about_dialog_get_authors (GtkAboutDialog *about);

Returns the string which are displayed in the authors tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

A `NULL`-terminated string array containing the authors. The array is owned by the about dialog and must not be modified.

[array zero-terminated=1][transfer none]

Since: 2.6

### gtk_about_dialog_set_authors ()

    void
    gtk_about_dialog_set_authors (GtkAboutDialog *about,
                                  const gchar **authors);

Sets the strings which are displayed in the authors tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |
authors | a `NULL`-terminated array of strings. | [array zero-terminated=1]

Since: 2.6

### gtk_about_dialog_get_artists ()

    const gchar * const *
    gtk_about_dialog_get_artists (GtkAboutDialog *about);

Returns the string which are displayed in the artists tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

A `NULL`-terminated string array containing the artists. The array is owned by the about dialog and must not be modified.

[array zero-terminated=1][transfer none]

Since: 2.6

### gtk_about_dialog_set_artists ()

    void
    gtk_about_dialog_set_artists (GtkAboutDialog *about,
                                  const gchar **artists);

Sets the strings which are displayed in the artists tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |
artists | a `NULL`-terminated array of strings. | [array zero-terminated=1]

Since: 2.6

### gtk_about_dialog_get_documenters ()

    const gchar * const *
    gtk_about_dialog_get_documenters (GtkAboutDialog *about);

Returns the string which are displayed in the documenters tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

A `NULL`-terminated string array containing the documenters. The array is owned by the about dialog and must not be modified.

[array zero-terminated=1][transfer none]

Since: 2.6

### gtk_about_dialog_set_documenters ()

    void
    gtk_about_dialog_set_documenters (GtkAboutDialog *about,
                                      const gchar **documenters);

Sets the strings which are displayed in the documenters tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |
documenters | a `NULL`-terminated array of strings. | [array zero-terminated=1]

Since: 2.6

### gtk_about_dialog_get_translator_credits ()

    const gchar *
    gtk_about_dialog_get_translator_credits
                                   (GtkAboutDialog *about);

Returns the translator credits string which is displayed in the translators tab of the secondary credits dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

The translator credits string. The string is owned by the about dialog and must not be modified.

Since: 2.6

### gtk_about_dialog_set_translator_credits ()

    void
    gtk_about_dialog_set_translator_credits
                                   (GtkAboutDialog *about,
                                    const gchar *translator_credits);

Sets the translator credits string which is displayed in the translators tab of the secondary credits dialog.

The intended use for this string is to display the translator of the language which is currently used in the user interface. Using `gettext()`, a simple way to achieve that is to mark the string for translation:

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    GtkWidget *about = gtk_about_dialog_new ();
    gtk_about_dialog_set_translator_credits (GTK_ABOUT_DIALOG (about),
                                             _("translator-credits"));

It is a good idea to use the customary msgid “translator-credits” for this purpose, since translators will already know the purpose of that msgid, and since GtkAboutDialog will detect if “translator-credits” is untranslated and hide the tab.

#### Parameters

about | a GtkAboutDialog |
translator_credits | the translator credits. | [allow-none]

Since: 2.6

### gtk_about_dialog_get_logo ()

    GdkPixbuf *
    gtk_about_dialog_get_logo (GtkAboutDialog *about);

Returns the pixbuf displayed as logo in the about dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

the pixbuf displayed as logo. The pixbuf is owned by the about dialog. If you want to keep a reference to it, you have to call `g_object_ref()` on it.

[transfer none]

Since: 2.6

### gtk_about_dialog_set_logo ()

    void
    gtk_about_dialog_set_logo (GtkAboutDialog *about,
                               GdkPixbuf *logo);

Sets the pixbuf to be displayed as logo in the about dialog. If it is `NULL`, the default window icon set with `gtk_window_set_default_icon()` will be used.

#### Parameters

about | a GtkAboutDialog |
logo | a GdkPixbuf, or `NULL`. | [allow-none]

Since: 2.6

### gtk_about_dialog_get_logo_icon_name ()

    const gchar *
    gtk_about_dialog_get_logo_icon_name (GtkAboutDialog *about);

Returns the icon name displayed as logo in the about dialog.

#### Parameters

about | a GtkAboutDialog |

#### Returns

the icon name displayed as logo. The string is owned by the dialog. If you want to keep a reference to it, you have to call `g_strdup()` on it.

Since: 2.6

### gtk_about_dialog_set_logo_icon_name ()

    void
    gtk_about_dialog_set_logo_icon_name (GtkAboutDialog *about,
                                         const gchar *icon_name);

Sets the pixbuf to be displayed as logo in the about dialog. If it is `NULL`, the default window icon set with `gtk_window_set_default_icon()` will be used.

#### Parameters

about | a GtkAboutDialog |
icon_name | an icon name, or `NULL`. | [allow-none]

Since: 2.6

### gtk_about_dialog_add_credit_section ()

    void
    gtk_about_dialog_add_credit_section (GtkAboutDialog *about,
                                         const gchar *section_name,
                                         const gchar **people);

Creates a new section in the Credits page.

#### Parameters

about | A GtkAboutDialog |
section_name | The name of the section |
people | The people who belong to that section. | [array zero-terminated=1]

Since: 3.4

### gtk_show_about_dialog ()

    void
    gtk_show_about_dialog (GtkWindow *parent,
                           const gchar *first_property_name,
                           ...);

This is a convenience function for showing an application’s about box. The constructed dialog is associated with the parent window and reused for future invocations of this function.

#### Parameters

parent | transient parent, or `NULL` for none. | [allow-none]
first_property_name | the name of the first property |
... | value of first property, followed by more properties, `NULL`-terminated |

Since: 2.6

## Types and Values

### struct GtkAboutDialog

    struct GtkAboutDialog;

The GtkAboutDialog contains only private fields and should not be directly accessed.

### enum GtkLicense

The type of license for an application.

This enumeration can be expanded at later date.

#### Members

GTK_LICENSE_UNKNOWN | No license specified |
GTK_LICENSE_CUSTOM | A license text is going to be specified by the developer |
GTK_LICENSE_GPL_2_0 | The GNU General Public License, version 2.0 or later |
GTK_LICENSE_GPL_3_0 | The GNU General Public License, version 3.0 or later |
GTK_LICENSE_LGPL_2_1 | The GNU Lesser General Public License, version 2.1 or later |
GTK_LICENSE_LGPL_3_0 | The GNU Lesser General Public License, version 3.0 or later |
GTK_LICENSE_BSD | The BSD standard license |
GTK_LICENSE_MIT_X11 | The MIT/X11 standard license |
GTK_LICENSE_ARTISTIC | The Artistic License, version 2.0 |
GTK_LICENSE_GPL_2_0_ONLY | The GNU General Public License, version 2.0 only. Since 3.12. |
GTK_LICENSE_GPL_3_0_ONLY | The GNU General Public License, version 3.0 only. Since 3.12. |
GTK_LICENSE_LGPL_2_1_ONLY | The GNU Lesser General Public License, version 2.1 only. Since 3.12. |
GTK_LICENSE_LGPL_3_0_ONLY | The GNU Lesser General Public License, version 3.0 only. Since 3.12. |
GTK_LICENSE_AGPL_3_0 | The GNU Affero General Public License, version 3.0 or later. Since: 3.22. |
GTK_LICENSE_AGPL_3_0_ONLY | The GNU Affero General Public License, version 3.0 only. Since: 3.22.27. |
GTK_LICENSE_BSD_3 | The 3-clause BSD licence. Since: 3.24.20. |
GTK_LICENSE_APACHE_2_0 | The Apache License, version 2.0. Since: 3.24.20. |
GTK_LICENSE_MPL_2_0 | The Mozilla Public License, version 2.0. Since: 3.24.20. |

Since: 3.0

## Property Details

### The `“artists”` property

      “artists”                  GStrv

The people who contributed artwork to the program, as a `NULL`-terminated array of strings. Each string may contain email addresses and URLs, which will be displayed as links, see the introduction for more details.

Owner: GtkAboutDialog

Flags: Read / Write

Since: 2.6

### The `“authors”` property

      “authors”                  GStrv

The authors of the program, as a `NULL`-terminated array of strings. Each string may contain email addresses and URLs, which will be displayed as links, see the introduction for more details.

Owner: GtkAboutDialog

Flags: Read / Write

Since: 2.6

### The `“comments”` property

      “comments”                 gchar *

Comments about the program. This string is displayed in a label in the main dialog, thus it should be a short explanation of the main purpose of the program, not a detailed list of features.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“copyright”` property

      “copyright”                gchar *

Copyright information for the program.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“documenters”` property

      “documenters”              GStrv

The people documenting the program, as a `NULL`-terminated array of strings. Each string may contain email addresses and URLs, which will be displayed as links, see the introduction for more details.

Owner: GtkAboutDialog

Flags: Read / Write

Since: 2.6

### The `“license”` property

      “license”                  gchar *

The license of the program. This string is displayed in a text view in a secondary dialog, therefore it is fine to use a long multi-paragraph text. Note that the text is only wrapped in the text view if the "wrap-license" property is set to `TRUE`; otherwise the text itself must contain the intended linebreaks. When setting this property to a non-`NULL` value, the “license-type” property is set to `GTK_LICENSE_CUSTOM` as a side effect.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“license-type”` property

      “license-type”             GtkLicense

The license of the program, as a value of the `GtkLicense` enumeration.

The GtkAboutDialog will automatically fill out a standard disclaimer and link the user to the appropriate online resource for the license text.

If `GTK_LICENSE_UNKNOWN` is used, the link used will be the same specified in the “website” property.

If `GTK_LICENSE_CUSTOM` is used, the current contents of the “license” property are used.

For any other GtkLicense value, the contents of the “license” property are also set by this property as a side effect.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: GTK_LICENSE_UNKNOWN

Since: 3.0

### The `“logo”` property

      “logo”                     GdkPixbuf *

A logo for the about box. If it is `NULL`, the default window icon set with `gtk_window_set_default_icon()` will be used.

Owner: GtkAboutDialog

Flags: Read / Write

Since: 2.6

### The `“logo-icon-name”` property

      “logo-icon-name”           gchar *

A named icon to use as the logo for the about box. This property overrides the “logo” property.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: "image-missing"

Since: 2.6

### The `“program-name”` property

      “program-name”             gchar *

The name of the program. If this is not set, it defaults to `g_get_application_name()`.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.12

### The `“translator-credits”` property

      “translator-credits”       gchar *

Credits to the translators. This string should be marked as translatable. The string may contain email addresses and URLs, which will be displayed as links, see the introduction for more details.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“version”` property

      “version”                  gchar *

The version of the program.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“website”` property

      “website”                  gchar *

The URL for the link to the website of the program. This should be a string starting with "http://.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“website-label”` property

      “website-label”            gchar *

The label for the link to the website of the program.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: NULL

Since: 2.6

### The `“wrap-license”` property

      “wrap-license”             gboolean

Whether to wrap the text in the license dialog.

Owner: GtkAboutDialog

Flags: Read / Write

Default value: FALSE

Since: 2.8

## Signal Details

### The `“activate-link”` signal

    gboolean
    user_function (GtkAboutDialog *label,
                   gchar          *uri,
                   gpointer        user_data)

The signal which gets emitted to activate a URI. Applications may connect to it to override the default behaviour, which is to call `gtk_show_uri_on_window()`.

#### Parameters

label | The object on which the signal was emitted |
uri | the URI that is activated |
user_data | user data set when the signal handler was connected. |

#### Returns

`TRUE` if the link has been activated

Flags: Run Last

Since: 2.24