## Settings

Settings — Sharing settings between applications

## Synopsis

    #include <gtk/gtk.h>

                        GtkSettings;
    struct              GtkSettingsValue;
    GtkSettings *       gtk_settings_get_default            (void);
    GtkSettings *       gtk_settings_get_for_screen         (GdkScreen *screen);
    void                gtk_settings_install_property       (GParamSpec *pspec);
    void                gtk_settings_install_property_parser
                                                            (GParamSpec *pspec,
                                                             GtkRcPropertyParser parser);
    gboolean            gtk_rc_property_parse_color         (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);
    gboolean            gtk_rc_property_parse_enum          (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);
    gboolean            gtk_rc_property_parse_flags         (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);
    gboolean            gtk_rc_property_parse_requisition   (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);
    gboolean            gtk_rc_property_parse_border        (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);
    void                gtk_settings_set_property_value     (GtkSettings *settings,
                                                             const gchar *name,
                                                             const GtkSettingsValue *svalue);
    void                gtk_settings_set_string_property    (GtkSettings *settings,
                                                             const gchar *name,
                                                             const gchar *v_string,
                                                             const gchar *origin);
    void                gtk_settings_set_long_property      (GtkSettings *settings,
                                                             const gchar *name,
                                                             glong v_long,
                                                             const gchar *origin);
    void                gtk_settings_set_double_property    (GtkSettings *settings,
                                                             const gchar *name,
                                                             gdouble v_double,
                                                             const gchar *origin);

## Object Hierarchy

      GObject
       +----GtkSettings

## Implemented Interfaces

GtkSettings implements GtkStyleProvider.

## Properties

      "color-hash"               GHashTable*           : Read
      "gtk-alternative-button-order" gboolean              : Read / Write
      "gtk-alternative-sort-arrows" gboolean              : Read / Write
      "gtk-application-prefer-dark-theme" gboolean              : Read / Write
      "gtk-auto-mnemonics"       gboolean              : Read / Write
      "gtk-button-images"        gboolean              : Read / Write
      "gtk-can-change-accels"    gboolean              : Read / Write
      "gtk-color-palette"        gchar*                : Read / Write
      "gtk-color-scheme"         gchar*                : Read / Write
      "gtk-cursor-blink"         gboolean              : Read / Write
      "gtk-cursor-blink-time"    gint                  : Read / Write
      "gtk-cursor-blink-timeout" gint                  : Read / Write
      "gtk-cursor-theme-name"    gchar*                : Read / Write
      "gtk-cursor-theme-size"    gint                  : Read / Write
      "gtk-dnd-drag-threshold"   gint                  : Read / Write
      "gtk-double-click-distance" gint                  : Read / Write
      "gtk-double-click-time"    gint                  : Read / Write
      "gtk-enable-accels"        gboolean              : Read / Write
      "gtk-enable-animations"    gboolean              : Read / Write
      "gtk-enable-event-sounds"  gboolean              : Read / Write
      "gtk-enable-input-feedback-sounds" gboolean              : Read / Write
      "gtk-enable-mnemonics"     gboolean              : Read / Write
      "gtk-enable-tooltips"      gboolean              : Read / Write
      "gtk-entry-password-hint-timeout" guint                 : Read / Write
      "gtk-entry-select-on-focus" gboolean              : Read / Write
      "gtk-error-bell"           gboolean              : Read / Write
      "gtk-fallback-icon-theme"  gchar*                : Read / Write
      "gtk-file-chooser-backend" gchar*                : Read / Write
      "gtk-font-name"            gchar*                : Read / Write
      "gtk-fontconfig-timestamp" guint                 : Read / Write
      "gtk-icon-sizes"           gchar*                : Read / Write
      "gtk-icon-theme-name"      gchar*                : Read / Write
      "gtk-im-module"            gchar*                : Read / Write
      "gtk-im-preedit-style"     GtkIMPreeditStyle     : Read / Write
      "gtk-im-status-style"      GtkIMStatusStyle      : Read / Write
      "gtk-key-theme-name"       gchar*                : Read / Write
      "gtk-keynav-cursor-only"   gboolean              : Read / Write
      "gtk-keynav-wrap-around"   gboolean              : Read / Write
      "gtk-label-select-on-focus" gboolean              : Read / Write
      "gtk-menu-bar-accel"       gchar*                : Read / Write
      "gtk-menu-bar-popup-delay" gint                  : Read / Write
      "gtk-menu-images"          gboolean              : Read / Write
      "gtk-menu-popdown-delay"   gint                  : Read / Write
      "gtk-menu-popup-delay"     gint                  : Read / Write
      "gtk-modules"              gchar*                : Read / Write
      "gtk-print-backends"       gchar*                : Read / Write
      "gtk-print-preview-command" gchar*                : Read / Write
      "gtk-recent-files-limit"   gint                  : Read / Write
      "gtk-recent-files-max-age" gint                  : Read / Write
      "gtk-scrolled-window-placement" GtkCornerType         : Read / Write
      "gtk-show-input-method-menu" gboolean              : Read / Write
      "gtk-show-unicode-menu"    gboolean              : Read / Write
      "gtk-sound-theme-name"     gchar*                : Read / Write
      "gtk-split-cursor"         gboolean              : Read / Write
      "gtk-theme-name"           gchar*                : Read / Write
      "gtk-timeout-expand"       gint                  : Read / Write
      "gtk-timeout-initial"      gint                  : Read / Write
      "gtk-timeout-repeat"       gint                  : Read / Write
      "gtk-toolbar-icon-size"    GtkIconSize           : Read / Write
      "gtk-toolbar-style"        GtkToolbarStyle       : Read / Write
      "gtk-tooltip-browse-mode-timeout" gint                  : Read / Write
      "gtk-tooltip-browse-timeout" gint                  : Read / Write
      "gtk-tooltip-timeout"      gint                  : Read / Write
      "gtk-touchscreen-mode"     gboolean              : Read / Write
      "gtk-xft-antialias"        gint                  : Read / Write
      "gtk-xft-dpi"              gint                  : Read / Write
      "gtk-xft-hinting"          gint                  : Read / Write
      "gtk-xft-hintstyle"        gchar*                : Read / Write
      "gtk-xft-rgba"             gchar*                : Read / Write

## Description

GtkSettings provide a mechanism to share global settings between applications.

On the X window system, this sharing is realized by an XSettings manager that is usually part of the desktop environment, along with utilities that let the user change these settings. In the absence of an Xsettings manager, GTK+ reads default values for settings from `settings.ini` files in `/etc/gtk-3.0` and `$XDG_CONFIG_HOME/gtk-3.0`. These files must be valid key files (see GKeyFile), and have a section called Settings. Themes can also provide default values for settings by installing a `settings.ini` file next to their `gtk.css` file.

Applications can override system-wide settings with `gtk_settings_set_string_property()`, `gtk_settings_set_long_property()`, etc. This should be restricted to special cases though; GtkSettings are not meant as an application configuration facility. When doing so, you need to be aware that settings that are specific to individual widgets may not be available before the widget type has been realized at least once. The following example demonstrates a way to do this:

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    gtk_init (&argc, &argv);

    /* make sure the type is realized */
    g_type_class_unref (g_type_class_ref (GTK_TYPE_IMAGE_MENU_ITEM));

    g_object_set (gtk_settings_get_default (), "gtk-menu-images", FALSE, NULL);

There is one GtkSettings instance per screen. It can be obtained with `gtk_settings_get_for_screen()`, but in many cases, it is more convenient to use `gtk_widget_get_settings()`. `gtk_settings_get_default()` returns the GtkSettings instance for the default screen.

## Details

### GtkSettings

    typedef struct _GtkSettings GtkSettings;

### struct GtkSettingsValue

    struct GtkSettingsValue {
      /* origin should be something like "filename:linenumber" for rc files,
       * or e.g. "XProperty" for other sources
       */
      gchar *origin;

      /* valid types are LONG, DOUBLE and STRING corresponding to the token parsed,
       * or a GSTRING holding an unparsed statement
       */
      GValue value;
    };

### gtk_settings_get_default ()

    GtkSettings *       gtk_settings_get_default            (void);

Gets the GtkSettings object for the default GDK screen, creating it if necessary. See `gtk_settings_get_for_screen()`.

Returns : | a GtkSettings object. If there is no default screen, then returns `NULL`. [transfer none]

### gtk_settings_get_for_screen ()

    GtkSettings *       gtk_settings_get_for_screen         (GdkScreen *screen);

Gets the GtkSettings object for `screen`, creating it if necessary.

`screen` : | a GdkScreen.
Returns : | a GtkSettings object. [transfer none]

Since 2.2

### gtk_settings_install_property ()

    void                gtk_settings_install_property       (GParamSpec *pspec);

### gtk_settings_install_property_parser ()

    void                gtk_settings_install_property_parser
                                                            (GParamSpec *pspec,
                                                             GtkRcPropertyParser parser);

`parser` : | . [scope call]

### gtk_rc_property_parse_color ()

    gboolean            gtk_rc_property_parse_color         (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);

A GtkRcPropertyParser for use with `gtk_settings_install_property_parser()` or `gtk_widget_class_install_style_property_parser()` which parses a color given either by its name or in the form `{ red, green, blue }` where `red`, `green` and `blue` are integers between 0 and 65535 or floating-point numbers between 0 and 1.

`pspec` : | a GParamSpec
`gstring` : | the GString to be parsed
`property_value` : | a GValue which must hold GdkColor values.
Returns : | `TRUE` if `gstring` could be parsed and `property_value` has been set to the resulting GdkColor.

### gtk_rc_property_parse_enum ()

    gboolean            gtk_rc_property_parse_enum          (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);

A GtkRcPropertyParser for use with `gtk_settings_install_property_parser()` or `gtk_widget_class_install_style_property_parser()` which parses a single enumeration value.

The enumeration value can be specified by its name, its nickname or its numeric value. For consistency with flags parsing, the value may be surrounded by parentheses.

`pspec` : | a GParamSpec
`gstring` : | the GString to be parsed
`property_value` : | a GValue which must hold enum values.
Returns : | `TRUE` if `gstring` could be parsed and `property_value` has been set to the resulting GEnumValue.

### gtk_rc_property_parse_flags ()

    gboolean            gtk_rc_property_parse_flags         (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);

A GtkRcPropertyParser for use with `gtk_settings_install_property_parser()` or `gtk_widget_class_install_style_property_parser()` which parses flags.

Flags can be specified by their name, their nickname or numerically. Multiple flags can be specified in the form `"( flag1 | flag2 | ... )"`.

`pspec` : | a GParamSpec
`gstring` : | the GString to be parsed
`property_value` : | a GValue which must hold flags values.
Returns : | `TRUE` if `gstring` could be parsed and `property_value` has been set to the resulting flags value.

### gtk_rc_property_parse_requisition ()

    gboolean            gtk_rc_property_parse_requisition   (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);

A GtkRcPropertyParser for use with `gtk_settings_install_property_parser()` or `gtk_widget_class_install_style_property_parser()` which parses a requisition in the form `"{ width, height }"` for integers `width` and `height`.

`pspec` : | a GParamSpec
`gstring` : | the GString to be parsed
`property_value` : | a GValue which must hold boxed values.
Returns : | `TRUE` if `gstring` could be parsed and `property_value` has been set to the resulting GtkRequisition.

### gtk_rc_property_parse_border ()

    gboolean            gtk_rc_property_parse_border        (const GParamSpec *pspec,
                                                             const GString *gstring,
                                                             GValue *property_value);

A GtkRcPropertyParser for use with `gtk_settings_install_property_parser()` or `gtk_widget_class_install_style_property_parser()` which parses borders in the form `"{ left, right, top, bottom }"` for integers `left`, `right`, `top` and `bottom`.

`pspec` : | a GParamSpec
`gstring` : | the GString to be parsed
`property_value` : | a GValue which must hold boxed values.
Returns : | `TRUE` if `gstring` could be parsed and `property_value` has been set to the resulting GtkBorder.

### gtk_settings_set_property_value ()

    void                gtk_settings_set_property_value     (GtkSettings *settings,
                                                             const gchar *name,
                                                             const GtkSettingsValue *svalue);

### gtk_settings_set_string_property ()

    void                gtk_settings_set_string_property    (GtkSettings *settings,
                                                             const gchar *name,
                                                             const gchar *v_string,
                                                             const gchar *origin);

### gtk_settings_set_long_property ()

    void                gtk_settings_set_long_property      (GtkSettings *settings,
                                                             const gchar *name,
                                                             glong v_long,
                                                             const gchar *origin);

### gtk_settings_set_double_property ()

    void                gtk_settings_set_double_property    (GtkSettings *settings,
                                                             const gchar *name,
                                                             gdouble v_double,
                                                             const gchar *origin);

## Property Details

### The `"color-hash"` property

      "color-hash"               GHashTable*           : Read

Holds a hash table representation of the "gtk-color-scheme" setting, mapping color names to GdkColors.

Since 2.10

### The `"gtk-alternative-button-order"` property

      "gtk-alternative-button-order" gboolean              : Read / Write

Whether buttons in dialogs should use the alternative button order.

Default value: FALSE

### The `"gtk-alternative-sort-arrows"` property

      "gtk-alternative-sort-arrows" gboolean              : Read / Write

Controls the direction of the sort indicators in sorted list and tree views. By default an arrow pointing down means the column is sorted in ascending order. When set to `TRUE`, this order will be inverted.

Default value: FALSE

Since 2.12

### The `"gtk-application-prefer-dark-theme"` property

      "gtk-application-prefer-dark-theme" gboolean              : Read / Write

Whether the application prefers to use a dark theme. If a GTK+ theme includes a dark variant, it will be used instead of the configured theme.

Some applications benefit from minimizing the amount of light pollution that interferes with the content. Good candidates for dark themes are photo and video editors that make the actual content get all the attention and minimize the distraction of the chrome.

Dark themes should not be used for documents, where large spaces are white/light and the dark chrome creates too much contrast (web browser, text editor...).

Default value: FALSE

Since 2.22

### The `"gtk-auto-mnemonics"` property

      "gtk-auto-mnemonics"       gboolean              : Read / Write

Whether mnemonics should be automatically shown and hidden when the user presses the mnemonic activator.

Default value: FALSE

Since 2.20

### The `"gtk-button-images"` property

      "gtk-button-images"        gboolean              : Read / Write

Whether images should be shown on buttons.

Default value: TRUE

### The `"gtk-can-change-accels"` property

      "gtk-can-change-accels"    gboolean              : Read / Write

Whether menu accelerators can be changed by pressing a key over the menu item.

Default value: FALSE

### The `"gtk-color-palette"` property

      "gtk-color-palette"        gchar*                : Read / Write

Palette to use in the color selector.

Default value: "black:white:gray50:red:purple:blue:light blue:green:yellow:orange:lavender:brown:goldenrod4:dodger blue:pink:light green:gray10:gray30:gray75:gray90"

### The `"gtk-color-scheme"` property

      "gtk-color-scheme"         gchar*                : Read / Write

A palette of named colors for use in themes. The format of the string is

    name1: color1
    name2: color2
    ...

Color names must be acceptable as identifiers in the gtkrc syntax, and color specifications must be in the format accepted by `gdk_color_parse()`.

Note that due to the way the color tables from different sources are merged, color specifications will be converted to hexadecimal form when getting this property.

Starting with GTK+ 2.12, the entries can alternatively be separated by ';' instead of newlines:

    name1: color1; name2: color2; ...

Default value: ""

Since 2.10

### The `"gtk-cursor-blink"` property

      "gtk-cursor-blink"         gboolean              : Read / Write

Whether the cursor should blink.

Also see the "gtk-cursor-blink-timeout" setting, which allows more flexible control over cursor blinking.

Default value: TRUE

### The `"gtk-cursor-blink-time"` property

      "gtk-cursor-blink-time"    gint                  : Read / Write

Length of the cursor blink cycle, in milliseconds.

Allowed values: >= 100

Default value: 1200

### The `"gtk-cursor-blink-timeout"` property

      "gtk-cursor-blink-timeout" gint                  : Read / Write

Time after which the cursor stops blinking, in seconds. The timer is reset after each user interaction.

Setting this to zero has the same effect as setting "gtk-cursor-blink" to `FALSE`.

Allowed values: >= 1

Default value: 2147483647

Since 2.12

### The `"gtk-cursor-theme-name"` property

      "gtk-cursor-theme-name"    gchar*                : Read / Write

Name of the cursor theme to use, or NULL to use the default theme.

Default value: NULL

### The `"gtk-cursor-theme-size"` property

      "gtk-cursor-theme-size"    gint                  : Read / Write

Size to use for cursors, or 0 to use the default size.

Allowed values: [0,128]

Default value: 0

### The `"gtk-dnd-drag-threshold"` property

      "gtk-dnd-drag-threshold"   gint                  : Read / Write

Number of pixels the cursor can move before dragging.

Allowed values: >= 1

Default value: 8

### The `"gtk-double-click-distance"` property

      "gtk-double-click-distance" gint                  : Read / Write

Maximum distance allowed between two clicks for them to be considered a double click (in pixels).

Allowed values: >= 0

Default value: 5

### The `"gtk-double-click-time"` property

      "gtk-double-click-time"    gint                  : Read / Write

Maximum time allowed between two clicks for them to be considered a double click (in milliseconds).

Allowed values: >= 0

Default value: 250

### The `"gtk-enable-accels"` property

      "gtk-enable-accels"        gboolean              : Read / Write

Whether menu items should have visible accelerators which can be activated.

Default value: TRUE

Since 2.12

### The `"gtk-enable-animations"` property

      "gtk-enable-animations"    gboolean              : Read / Write

Whether to enable toolkit-wide animations.

Default value: TRUE

### The `"gtk-enable-event-sounds"` property

      "gtk-enable-event-sounds"  gboolean              : Read / Write

Whether to play any event sounds at all.

See the Sound Theme spec for more information on event sounds and sound themes.

GTK+ itself does not support event sounds, you have to use a loadable module like the one that comes with libcanberra.

Default value: TRUE

Since 2.14

### The `"gtk-enable-input-feedback-sounds"` property

      "gtk-enable-input-feedback-sounds" gboolean              : Read / Write

Whether to play event sounds as feedback to user input.

See the Sound Theme spec for more information on event sounds and sound themes.

GTK+ itself does not support event sounds, you have to use a loadable module like the one that comes with libcanberra.

Default value: TRUE

Since 2.14

### The `"gtk-enable-mnemonics"` property

      "gtk-enable-mnemonics"     gboolean              : Read / Write

Whether labels and menu items should have visible mnemonics which can be activated.

Default value: TRUE

Since 2.12

### The `"gtk-enable-tooltips"` property

      "gtk-enable-tooltips"      gboolean              : Read / Write

Whether tooltips should be shown on widgets.

Default value: TRUE

Since 2.14

### The `"gtk-entry-password-hint-timeout"` property

      "gtk-entry-password-hint-timeout" guint                 : Read / Write

How long to show the last input character in hidden entries. This value is in milliseconds. 0 disables showing the last char. 600 is a good value for enabling it.

Default value: 0

Since 2.10

### The `"gtk-entry-select-on-focus"` property

      "gtk-entry-select-on-focus" gboolean              : Read / Write

Whether to select the contents of an entry when it is focused.

Default value: TRUE

### The `"gtk-error-bell"` property

      "gtk-error-bell"           gboolean              : Read / Write

When `TRUE`, keyboard navigation and other input-related errors will cause a beep. Since the error bell is implemented using `gdk_window_beep()`, the windowing system may offer ways to configure the error bell in many ways, such as flashing the window or similar visual effects.

Default value: TRUE

Since 2.12

### The `"gtk-fallback-icon-theme"` property

      "gtk-fallback-icon-theme"  gchar*                : Read / Write

Name of a icon theme to fall back to.

Default value: NULL

### The `"gtk-file-chooser-backend"` property

      "gtk-file-chooser-backend" gchar*                : Read / Write

Name of the GtkFileChooser backend to use by default.

Default value: NULL

### The `"gtk-font-name"` property

      "gtk-font-name"            gchar*                : Read / Write

Name of default font to use.

Default value: "Sans 10"

### The `"gtk-fontconfig-timestamp"` property

      "gtk-fontconfig-timestamp" guint                 : Read / Write

Timestamp of current fontconfig configuration.

Default value: 0

### The `"gtk-icon-sizes"` property

      "gtk-icon-sizes"           gchar*                : Read / Write

A list of icon sizes. The list is separated by colons, and item has the form:

`size-name` = `width` , `height`

E.g. "gtk-menu=16,16:gtk-button=20,20:gtk-dialog=48,48". GTK+ itself use the following named icon sizes: gtk-menu, gtk-button, gtk-small-toolbar, gtk-large-toolbar, gtk-dnd, gtk-dialog. Applications can register their own named icon sizes with `gtk_icon_size_register()`.

Default value: NULL

### The `"gtk-icon-theme-name"` property

      "gtk-icon-theme-name"      gchar*                : Read / Write

Name of icon theme to use.

Default value: "hicolor"

### The `"gtk-im-module"` property

      "gtk-im-module"            gchar*                : Read / Write

Which IM (input method) module should be used by default. This is the input method that will be used if the user has not explicitly chosen another input method from the IM context menu.

See GtkIMContext and see the "gtk-show-input-method-menu" property.

Default value: NULL

### The `"gtk-im-preedit-style"` property

      "gtk-im-preedit-style"     GtkIMPreeditStyle     : Read / Write

How to draw the input method preedit string.

Default value: GTK_IM_PREEDIT_CALLBACK

### The `"gtk-im-status-style"` property

      "gtk-im-status-style"      GtkIMStatusStyle      : Read / Write

How to draw the input method statusbar.

Default value: GTK_IM_STATUS_CALLBACK

### The `"gtk-key-theme-name"` property

      "gtk-key-theme-name"       gchar*                : Read / Write

Name of key theme to load.

Default value: NULL

### The `"gtk-keynav-cursor-only"` property

      "gtk-keynav-cursor-only"   gboolean              : Read / Write

When `TRUE`, keyboard navigation should be able to reach all widgets by using the cursor keys only. Tab, Shift etc. keys can't be expected to be present on the used input device.

Default value: FALSE

Since 2.12

### The `"gtk-keynav-wrap-around"` property

      "gtk-keynav-wrap-around"   gboolean              : Read / Write

When `TRUE`, some widgets will wrap around when doing keyboard navigation, such as menus, menubars and notebooks.

Default value: TRUE

Since 2.12

### The `"gtk-label-select-on-focus"` property

      "gtk-label-select-on-focus" gboolean              : Read / Write

Whether to select the contents of a selectable label when it is focused.

Default value: TRUE

### The `"gtk-menu-bar-accel"` property

      "gtk-menu-bar-accel"       gchar*                : Read / Write

Keybinding to activate the menu bar.

Default value: "F10"

### The `"gtk-menu-bar-popup-delay"` property

      "gtk-menu-bar-popup-delay" gint                  : Read / Write

Delay before the submenus of a menu bar appear.

Allowed values: >= 0

Default value: 0

### The `"gtk-menu-images"` property

      "gtk-menu-images"          gboolean              : Read / Write

Whether images should be shown in menus.

Default value: TRUE

### The `"gtk-menu-popdown-delay"` property

      "gtk-menu-popdown-delay"   gint                  : Read / Write

The time before hiding a submenu when the pointer is moving towards the submenu.

Allowed values: >= 0

Default value: 1000

### The `"gtk-menu-popup-delay"` property

      "gtk-menu-popup-delay"     gint                  : Read / Write

Minimum time the pointer must stay over a menu item before the submenu appear.

Allowed values: >= 0

Default value: 225

### The `"gtk-modules"` property

      "gtk-modules"              gchar*                : Read / Write

List of currently active GTK modules.

Default value: NULL

### The `"gtk-print-backends"` property

      "gtk-print-backends"       gchar*                : Read / Write

A comma-separated list of print backends to use in the print dialog. Available print backends depend on the GTK+ installation, and may include "file", "cups", "lpr" or "papi".

Default value: "file,cups"

Since 2.10

### The `"gtk-print-preview-command"` property

      "gtk-print-preview-command" gchar*                : Read / Write

A command to run for displaying the print preview. The command should contain a `f` placeholder, which will get replaced by the path to the pdf file. The command may also contain a `s` placeholder, which will get replaced by the path to a file containing the print settings in the format produced by `gtk_print_settings_to_file()`.

The preview application is responsible for removing the pdf file and the print settings file when it is done.

Default value: "evince --unlink-tempfile --preview --print-settings %s %f"

Since 2.10

### The `"gtk-recent-files-limit"` property

      "gtk-recent-files-limit"   gint                  : Read / Write

The number of recently used files that should be displayed by default by GtkRecentChooser implementations and by the GtkFileChooser. A value of -1 means every recently used file stored.

Allowed values: >= G_MAXULONG

Default value: 50

Since 2.12

### The `"gtk-recent-files-max-age"` property

      "gtk-recent-files-max-age" gint                  : Read / Write

The maximum age, in days, of the items inside the recently used resources list. Items older than this setting will be excised from the list. If set to 0, the list will always be empty; if set to -1, no item will be removed.

Allowed values: >= G_MAXULONG

Default value: 30

Since 2.14

### The `"gtk-scrolled-window-placement"` property

      "gtk-scrolled-window-placement" GtkCornerType         : Read / Write

Where the contents of scrolled windows are located with respect to the scrollbars, if not overridden by the scrolled window's own placement.

Default value: GTK_CORNER_TOP_LEFT

Since 2.10

### The `"gtk-show-input-method-menu"` property

      "gtk-show-input-method-menu" gboolean              : Read / Write

Whether the context menus of entries and text views should offer to change the input method.

Default value: TRUE

### The `"gtk-show-unicode-menu"` property

      "gtk-show-unicode-menu"    gboolean              : Read / Write

Whether the context menus of entries and text views should offer to insert control characters.

Default value: TRUE

### The `"gtk-sound-theme-name"` property

      "gtk-sound-theme-name"     gchar*                : Read / Write

The XDG sound theme to use for event sounds.

See the Sound Theme spec for more information on event sounds and sound themes.

GTK+ itself does not support event sounds, you have to use a loadable module like the one that comes with libcanberra.

Default value: "freedesktop"

Since 2.14

### The `"gtk-split-cursor"` property

      "gtk-split-cursor"         gboolean              : Read / Write

Whether two cursors should be displayed for mixed left-to-right and right-to-left text.

Default value: TRUE

### The `"gtk-theme-name"` property

      "gtk-theme-name"           gchar*                : Read / Write

Name of theme to load.

Default value: "Raleigh"

### The `"gtk-timeout-expand"` property

      "gtk-timeout-expand"       gint                  : Read / Write

Expand value for timeouts, when a widget is expanding a new region.

Allowed values: >= 0

Default value: 500

### The `"gtk-timeout-initial"` property

      "gtk-timeout-initial"      gint                  : Read / Write

Starting value for timeouts, when button is pressed.

Allowed values: >= 0

Default value: 200

### The `"gtk-timeout-repeat"` property

      "gtk-timeout-repeat"       gint                  : Read / Write

Repeat value for timeouts, when button is pressed.

Allowed values: >= 0

Default value: 20

### The `"gtk-toolbar-icon-size"` property

      "gtk-toolbar-icon-size"    GtkIconSize           : Read / Write

The size of icons in default toolbars.

Default value: GTK_ICON_SIZE_LARGE_TOOLBAR

### The `"gtk-toolbar-style"` property

      "gtk-toolbar-style"        GtkToolbarStyle       : Read / Write

The size of icons in default toolbars.

Default value: GTK_TOOLBAR_BOTH

### The `"gtk-tooltip-browse-mode-timeout"` property

      "gtk-tooltip-browse-mode-timeout" gint                  : Read / Write

Amount of time, in milliseconds, after which the browse mode will be disabled.

See "gtk-tooltip-browse-timeout" for more information about browse mode.

Allowed values: >= 0

Default value: 500

Since 2.12

### The `"gtk-tooltip-browse-timeout"` property

      "gtk-tooltip-browse-timeout" gint                  : Read / Write

Controls the time after which tooltips will appear when browse mode is enabled, in milliseconds.

Browse mode is enabled when the mouse pointer moves off an object where a tooltip was currently being displayed. If the mouse pointer hits another object before the browse mode timeout expires (see "gtk-tooltip-browse-mode-timeout"), it will take the amount of milliseconds specified by this setting to popup the tooltip for the new object.

Allowed values: >= 0

Default value: 60

Since 2.12

### The `"gtk-tooltip-timeout"` property

      "gtk-tooltip-timeout"      gint                  : Read / Write

Time, in milliseconds, after which a tooltip could appear if the cursor is hovering on top of a widget.

Allowed values: >= 0

Default value: 500

Since 2.12

### The `"gtk-touchscreen-mode"` property

      "gtk-touchscreen-mode"     gboolean              : Read / Write

When `TRUE`, there are no motion notify events delivered on this screen, and widgets can't use the pointer hovering them for any essential functionality.

Default value: FALSE

Since 2.10

### The `"gtk-xft-antialias"` property

      "gtk-xft-antialias"        gint                  : Read / Write

Whether to antialias Xft fonts; 0=no, 1=yes, -1=default.

Allowed values: [G_MAXULONG,1]

Default value: -1

### The `"gtk-xft-dpi"` property

      "gtk-xft-dpi"              gint                  : Read / Write

Resolution for Xft, in 1024 * dots/inch. -1 to use default value.

Allowed values: [G_MAXULONG,1048576]

Default value: -1

### The `"gtk-xft-hinting"` property

      "gtk-xft-hinting"          gint                  : Read / Write

Whether to hint Xft fonts; 0=no, 1=yes, -1=default.

Allowed values: [G_MAXULONG,1]

Default value: -1

### The `"gtk-xft-hintstyle"` property

      "gtk-xft-hintstyle"        gchar*                : Read / Write

What degree of hinting to use; hintnone, hintslight, hintmedium, or hintfull.

Default value: NULL

### The `"gtk-xft-rgba"` property

      "gtk-xft-rgba"             gchar*                : Read / Write

Type of subpixel antialiasing; none, rgb, bgr, vrgb, vbgr.

Default value: NULL