GtkMenu

## GtkMenu GtkMenu — A menu widget |

## Synopsis

    #include <gtk/gtk.h>

    struct              GtkMenu;
    GtkWidget *         gtk_menu_new                        (void);
    void                gtk_menu_set_screen                 (GtkMenu *menu,
                                                             GdkScreen *screen);
    void                gtk_menu_reorder_child              (GtkMenu *menu,
                                                             GtkWidget *child,
                                                             gint position);
    void                gtk_menu_attach                     (GtkMenu *menu,
                                                             GtkWidget *child,
                                                             guint left_attach,
                                                             guint right_attach,
                                                             guint top_attach,
                                                             guint bottom_attach);
    void                gtk_menu_popup_for_device           (GtkMenu *menu,
                                                             GdkDevice *device,
                                                             GtkWidget *parent_menu_shell,
                                                             GtkWidget *parent_menu_item,
                                                             GtkMenuPositionFunc func,
                                                             gpointer data,
                                                             GDestroyNotify destroy,
                                                             guint button,
                                                             guint32 activate_time);
    void                gtk_menu_popup                      (GtkMenu *menu,
                                                             GtkWidget *parent_menu_shell,
                                                             GtkWidget *parent_menu_item,
                                                             GtkMenuPositionFunc func,
                                                             gpointer data,
                                                             guint button,
                                                             guint32 activate_time);
    void                gtk_menu_set_accel_group            (GtkMenu *menu,
                                                             GtkAccelGroup *accel_group);
    GtkAccelGroup *     gtk_menu_get_accel_group            (GtkMenu *menu);
    void                gtk_menu_set_accel_path             (GtkMenu *menu,
                                                             const gchar *accel_path);
    const gchar *       gtk_menu_get_accel_path             (GtkMenu *menu);
    void                gtk_menu_set_title                  (GtkMenu *menu,
                                                             const gchar *title);
    const gchar *       gtk_menu_get_title                  (GtkMenu *menu);
    void                gtk_menu_set_monitor                (GtkMenu *menu,
                                                             gint monitor_num);
    gint                gtk_menu_get_monitor                (GtkMenu *menu);
    gboolean            gtk_menu_get_tearoff_state          (GtkMenu *menu);
    void                gtk_menu_set_reserve_toggle_size    (GtkMenu *menu,
                                                             gboolean reserve_toggle_size);
    gboolean            gtk_menu_get_reserve_toggle_size    (GtkMenu *menu);

    void                gtk_menu_popdown                    (GtkMenu *menu);
    void                gtk_menu_reposition                 (GtkMenu *menu);
    GtkWidget *         gtk_menu_get_active                 (GtkMenu *menu);
    void                gtk_menu_set_active                 (GtkMenu *menu,
                                                             guint index);
    void                gtk_menu_set_tearoff_state          (GtkMenu *menu,
                                                             gboolean torn_off);
    void                gtk_menu_attach_to_widget           (GtkMenu *menu,
                                                             GtkWidget *attach_widget,
                                                             GtkMenuDetachFunc detacher);
    void                gtk_menu_detach                     (GtkMenu *menu);
    GtkWidget *         gtk_menu_get_attach_widget          (GtkMenu *menu);
    GList *             gtk_menu_get_for_attach_widget      (GtkWidget *widget);
    void                (*GtkMenuPositionFunc)              (GtkMenu *menu,
                                                             gint *x,
                                                             gint *y,
                                                             gboolean *push_in,
                                                             gpointer user_data);
    void                (*GtkMenuDetachFunc)                (GtkWidget *attach_widget,
                                                             GtkMenu *menu);

## Object Hierarchy

      GObject
       +----GInitiallyUnowned
             +----GtkWidget
                   +----GtkContainer
                         +----GtkMenuShell
                               +----GtkMenu
                                     +----GtkRecentChooserMenu

## Implemented Interfaces

GtkMenu implements AtkImplementorIface and GtkBuildable.

## Properties

      "accel-group"              GtkAccelGroup*        : Read / Write
      "accel-path"               gchar*                : Read / Write
      "active"                   gint                  : Read / Write
      "attach-widget"            GtkWidget*            : Read / Write
      "monitor"                  gint                  : Read / Write
      "reserve-toggle-size"      gboolean              : Read / Write
      "tearoff-state"            gboolean              : Read / Write
      "tearoff-title"            gchar*                : Read / Write

## Child Properties

      "bottom-attach"            gint                  : Read / Write
      "left-attach"              gint                  : Read / Write
      "right-attach"             gint                  : Read / Write
      "top-attach"               gint                  : Read / Write

## Style Properties

      "arrow-placement"          GtkArrowPlacement     : Read
      "arrow-scaling"            gfloat                : Read
      "double-arrows"            gboolean              : Read
      "horizontal-offset"        gint                  : Read
      "horizontal-padding"       gint                  : Read
      "vertical-offset"          gint                  : Read
      "vertical-padding"         gint                  : Read

## Signals

      "move-scroll"                                    : Action

## Description

A GtkMenu is a GtkMenuShell that implements a drop down menu consisting of a list of GtkMenuItem objects which can be navigated and activated by the user to perform application functions.

A GtkMenu is most commonly dropped down by activating a GtkMenuItem in a GtkMenuBar or popped up by activating a GtkMenuItem in another GtkMenu.

A GtkMenu can also be popped up by activating a GtkOptionMenu. Other composite widgets such as the GtkNotebook can pop up a GtkMenu as well.

Applications can display a GtkMenu as a popup menu by calling the `gtk_menu_popup()` function. The example below shows how an application can pop up a menu when the 3rd mouse button is pressed.

Example 75. Connecting the popup signal handler.

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    /* connect our handler which will popup the menu */
    g_signal_connect_swapped (window, "button_press_event",
    G_CALLBACK (my_popup_handler), menu);

Example 76. Signal handler which displays a popup menu.

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    static gint
    my_popup_handler (GtkWidget *widget, GdkEvent *event)
    {
      GtkMenu *menu;
      GdkEventButton *event_button;

      g_return_val_if_fail (widget != NULL, FALSE);
      g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
      g_return_val_if_fail (event != NULL, FALSE);

      /* The "widget" is the menu that was supplied when
       * g_signal_connect_swapped() was called.
       */
      menu = GTK_MENU (widget);

      if (event->type == GDK_BUTTON_PRESS)
        {
          event_button = (GdkEventButton *) event;
          if (event_button->button == 3)
            {
              gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
                              event_button->button, event_button->time);
              return TRUE;
            }
        }

      return FALSE;
    }

## Details

### struct GtkMenu

    struct GtkMenu;

### gtk_menu_new ()

    GtkWidget *         gtk_menu_new                        (void);

Creates a new GtkMenu

Returns : | a new GtkMenu

### gtk_menu_set_screen ()

    void                gtk_menu_set_screen                 (GtkMenu *menu,
                                                             GdkScreen *screen);

Sets the GdkScreen on which the menu will be displayed.

`menu` : | a GtkMenu
`screen` : | a GdkScreen, or `NULL` if the screen should be determined by the widget the menu is attached to. [allow-none]

Since 2.2

### gtk_menu_reorder_child ()

    void                gtk_menu_reorder_child              (GtkMenu *menu,
                                                             GtkWidget *child,
                                                             gint position);

Moves `child` to a new `position` in the list of `menu` children.

`menu` : | a GtkMenu
`child` : | the GtkMenuItem to move
`position` : | the new position to place `child`. Positions are numbered from 0 to n - 1

### gtk_menu_attach ()

    void                gtk_menu_attach                     (GtkMenu *menu,
                                                             GtkWidget *child,
                                                             guint left_attach,
                                                             guint right_attach,
                                                             guint top_attach,
                                                             guint bottom_attach);

Adds a new GtkMenuItem to a (table) menu. The number of 'cells' that an item will occupy is specified by `left_attach`, `right_attach`, `top_attach` and `bottom_attach`. These each represent the leftmost, rightmost, uppermost and lower column and row numbers of the table. (Columns and rows are indexed from zero).

Note that this function is not related to `gtk_menu_detach()`.

`menu` : | a GtkMenu
`child` : | a GtkMenuItem
`left_attach` : | The column number to attach the left side of the item to
`right_attach` : | The column number to attach the right side of the item to
`top_attach` : | The row number to attach the top of the item to
`bottom_attach` : | The row number to attach the bottom of the item to

Since 2.4

### gtk_menu_popup_for_device ()

    void                gtk_menu_popup_for_device           (GtkMenu *menu,
                                                             GdkDevice *device,
                                                             GtkWidget *parent_menu_shell,
                                                             GtkWidget *parent_menu_item,
                                                             GtkMenuPositionFunc func,
                                                             gpointer data,
                                                             GDestroyNotify destroy,
                                                             guint button,
                                                             guint32 activate_time);

Displays a menu and makes it available for selection.

Applications can use this function to display context-sensitive menus, and will typically supply `NULL` for the `parent_menu_shell`, `parent_menu_item`, `func`, `data` and `destroy` parameters. The default menu positioning function will position the menu at the current position of `device` (or its corresponding pointer).

The `button` parameter should be the mouse button pressed to initiate the menu popup. If the menu popup was initiated by something other than a mouse button press, such as a mouse button release or a keypress, `button` should be 0.

The `activate_time` parameter is used to conflict-resolve initiation of concurrent requests for mouse/keyboard grab requests. To function properly, this needs to be the time stamp of the user event (such as a mouse click or key press) that caused the initiation of the popup. Only if no such event is available, `gtk_get_current_event_time()` can be used instead.

`menu` : | a GtkMenu
`device` : | a GdkDevice. [allow-none]
`parent_menu_shell` : | the menu shell containing the triggering menu item, or `NULL`. [allow-none]
`parent_menu_item` : | the menu item whose activation triggered the popup, or `NULL`. [allow-none]
`func` : | a user supplied function used to position the menu, or `NULL`. [allow-none]
`data` : | user supplied data to be passed to `func`. [allow-none]
`destroy` : | destroy notify for `data`. [allow-none]
`button` : | the mouse button which was pressed to initiate the event
`activate_time` : | the time at which the activation event occurred

Since 3.0

### gtk_menu_popup ()

    void                gtk_menu_popup                      (GtkMenu *menu,
                                                             GtkWidget *parent_menu_shell,
                                                             GtkWidget *parent_menu_item,
                                                             GtkMenuPositionFunc func,
                                                             gpointer data,
                                                             guint button,
                                                             guint32 activate_time);

Displays a menu and makes it available for selection.

Applications can use this function to display context-sensitive menus, and will typically supply `NULL` for the `parent_menu_shell`, `parent_menu_item`, `func` and `data` parameters. The default menu positioning function will position the menu at the current mouse cursor position.

The `button` parameter should be the mouse button pressed to initiate the menu popup. If the menu popup was initiated by something other than a mouse button press, such as a mouse button release or a keypress, `button` should be 0.

The `activate_time` parameter is used to conflict-resolve initiation of concurrent requests for mouse/keyboard grab requests. To function properly, this needs to be the timestamp of the user event (such as a mouse click or key press) that caused the initiation of the popup. Only if no such event is available, `gtk_get_current_event_time()` can be used instead.

`menu` : | a GtkMenu
`parent_menu_shell` : | the menu shell containing the triggering menu item, or `NULL`. [allow-none]
`parent_menu_item` : | the menu item whose activation triggered the popup, or `NULL`. [allow-none]
`func` : | a user supplied function used to position the menu, or `NULL`. [allow-none]
`data` : | user supplied data to be passed to `func`.
`button` : | the mouse button which was pressed to initiate the event.
`activate_time` : | the time at which the activation event occurred.

### gtk_menu_set_accel_group ()

    void                gtk_menu_set_accel_group            (GtkMenu *menu,
                                                             GtkAccelGroup *accel_group);

Set the GtkAccelGroup which holds global accelerators for the menu. This accelerator group needs to also be added to all windows that this menu is being used in with `gtk_window_add_accel_group()`, in order for those windows to support all the accelerators contained in this group.

`menu` : | a GtkMenu
`accel_group` : | the GtkAccelGroup to be associated with the menu. [allow-none]

### gtk_menu_get_accel_group ()

    GtkAccelGroup *     gtk_menu_get_accel_group            (GtkMenu *menu);

Gets the GtkAccelGroup which holds global accelerators for the menu. See `gtk_menu_set_accel_group()`.

`menu` : | a GtkMenu
Returns : | the GtkAccelGroup associated with the menu. [transfer none]

### gtk_menu_set_accel_path ()

    void                gtk_menu_set_accel_path             (GtkMenu *menu,
                                                             const gchar *accel_path);

Sets an accelerator path for this menu from which accelerator paths for its immediate children, its menu items, can be constructed. The main purpose of this function is to spare the programmer the inconvenience of having to call `gtk_menu_item_set_accel_path()` on each menu item that should support runtime user changable accelerators. Instead, by just calling `gtk_menu_set_accel_path()` on their parent, each menu item of this menu, that contains a label describing its purpose, automatically gets an accel path assigned.

For example, a menu containing menu items "New" and "Exit", will, after `gtk_menu_set_accel_path (menu, "<Gnumeric-Sheet>/File");` has been called, assign its items the accel paths: `"<Gnumeric-Sheet>/File/New"` and `"<Gnumeric-Sheet>/File/Exit"`.

Assigning accel paths to menu items then enables the user to change their accelerators at runtime. More details about accelerator paths and their default setups can be found at `gtk_accel_map_add_entry()`.

Note that `accel_path` string will be stored in a GQuark. Therefore, if you pass a static string, you can save some memory by interning it first with `g_intern_static_string()`.

`menu` : | a valid GtkMenu
`accel_path` : | a valid accelerator path. [allow-none]

### gtk_menu_get_accel_path ()

    const gchar *       gtk_menu_get_accel_path             (GtkMenu *menu);

Retrieves the accelerator path set on the menu.

`menu` : | a valid GtkMenu
Returns : | the accelerator path set on the menu.

Since 2.14

### gtk_menu_set_title ()

    void                gtk_menu_set_title                  (GtkMenu *menu,
                                                             const gchar *title);

Sets the title string for the menu.

The title is displayed when the menu is shown as a tearoff menu. If `title` is `NULL`, the menu will see if it is attached to a parent menu item, and if so it will try to use the same text as that menu item's label.

`menu` : | a GtkMenu
`title` : | a string containing the title for the menu

### gtk_menu_get_title ()

    const gchar *       gtk_menu_get_title                  (GtkMenu *menu);

Returns the title of the menu. See `gtk_menu_set_title()`.

`menu` : | a GtkMenu
Returns : | the title of the menu, or `NULL` if the menu has no title set on it. This string is owned by GTK+ and should not be modified or freed.

### gtk_menu_set_monitor ()

    void                gtk_menu_set_monitor                (GtkMenu *menu,
                                                             gint monitor_num);

Informs GTK+ on which monitor a menu should be popped up. See `gdk_screen_get_monitor_geometry()`.

This function should be called from a GtkMenuPositionFunc if the menu should not appear on the same monitor as the pointer. This information can't be reliably inferred from the coordinates returned by a GtkMenuPositionFunc, since, for very long menus, these coordinates may extend beyond the monitor boundaries or even the screen boundaries.

`menu` : | a GtkMenu
`monitor_num` : | the number of the monitor on which the menu should be popped up

Since 2.4

### gtk_menu_get_monitor ()

    gint                gtk_menu_get_monitor                (GtkMenu *menu);

Retrieves the number of the monitor on which to show the menu.

`menu` : | a GtkMenu
Returns : | the number of the monitor on which the menu should be popped up or -1, if no monitor has been set

Since 2.14

### gtk_menu_get_tearoff_state ()

    gboolean            gtk_menu_get_tearoff_state          (GtkMenu *menu);

Returns whether the menu is torn off. See `gtk_menu_set_tearoff_state()`.

`menu` : | a GtkMenu
Returns : | `TRUE` if the menu is currently torn off.

### gtk_menu_set_reserve_toggle_size ()

    void                gtk_menu_set_reserve_toggle_size    (GtkMenu *menu,
                                                             gboolean reserve_toggle_size);

Sets whether the menu should reserve space for drawing toggles or icons, regardless of their actual presence.

`menu` : | a GtkMenu
`reserve_toggle_size` : | whether to reserve size for toggles

Since 2.18

### gtk_menu_get_reserve_toggle_size ()

    gboolean            gtk_menu_get_reserve_toggle_size    (GtkMenu *menu);

Returns whether the menu reserves space for toggles and icons, regardless of their actual presence.

`menu` : | a GtkMenu
Returns : | Whether the menu reserves toggle space

Since 2.18

### gtk_menu_popdown ()

    void                gtk_menu_popdown                    (GtkMenu *menu);

Removes the menu from the screen.

`menu` : | a GtkMenu

### gtk_menu_reposition ()

    void                gtk_menu_reposition                 (GtkMenu *menu);

Repositions the menu according to its position function.

`menu` : | a GtkMenu

### gtk_menu_get_active ()

    GtkWidget *         gtk_menu_get_active                 (GtkMenu *menu);

Returns the selected menu item from the menu. This is used by the GtkOptionMenu.

`menu` : | a GtkMenu
Returns : | the GtkMenuItem that was last selected in the menu. If a selection has not yet been made, the first menu item is selected. [transfer none]

### gtk_menu_set_active ()

    void                gtk_menu_set_active                 (GtkMenu *menu,
                                                             guint index);

Selects the specified menu item within the menu. This is used by the GtkOptionMenu and should not be used by anyone else.

`menu` : | a GtkMenu
`index` : | the index of the menu item to select. Iindex values are from 0 to n-1

### gtk_menu_set_tearoff_state ()

    void                gtk_menu_set_tearoff_state          (GtkMenu *menu,
                                                             gboolean torn_off);

Changes the tearoff state of the menu. A menu is normally displayed as drop down menu which persists as long as the menu is active. It can also be displayed as a tearoff menu which persists until it is closed or reattached.

`menu` : | a GtkMenu
`torn_off` : | If `TRUE`, menu is displayed as a tearoff menu.

### gtk_menu_attach_to_widget ()

    void                gtk_menu_attach_to_widget           (GtkMenu *menu,
                                                             GtkWidget *attach_widget,
                                                             GtkMenuDetachFunc detacher);

Attaches the menu to the widget and provides a callback function that will be invoked when the menu calls `gtk_menu_detach()` during its destruction.

`menu` : | a GtkMenu
`attach_widget` : | the GtkWidget that the menu will be attached to
`detacher` : | the user supplied callback function that will be called when the menu calls `gtk_menu_detach()`. [scope async][allow-none]

### gtk_menu_detach ()

    void                gtk_menu_detach                     (GtkMenu *menu);

Detaches the menu from the widget to which it had been attached. This function will call the callback function, `detacher`, provided when the `gtk_menu_attach_to_widget()` function was called.

`menu` : | a GtkMenu

### gtk_menu_get_attach_widget ()

    GtkWidget *         gtk_menu_get_attach_widget          (GtkMenu *menu);

Returns the GtkWidget that the menu is attached to.

`menu` : | a GtkMenu
Returns : | the GtkWidget that the menu is attached to. [transfer none]

### gtk_menu_get_for_attach_widget ()

    GList *             gtk_menu_get_for_attach_widget      (GtkWidget *widget);

Returns a list of the menus which are attached to this widget. This list is owned by GTK+ and must not be modified.

`widget` : | a GtkWidget
Returns : | the list of menus attached to his widget. [element-type GtkWidget][transfer none]

Since 2.6

### GtkMenuPositionFunc ()

    void                (*GtkMenuPositionFunc)              (GtkMenu *menu,
                                                             gint *x,
                                                             gint *y,
                                                             gboolean *push_in,
                                                             gpointer user_data);

A user function supplied when calling `gtk_menu_popup()` which controls the positioning of the menu when it is displayed. The function sets the `x` and `y` parameters to the coordinates where the menu is to be drawn. To make the menu appear on a different monitor than the mouse pointer, `gtk_menu_set_monitor()` must be called.

`menu` : | a GtkMenu.
`x` : | address of the gint representing the horizontal position where the menu shall be drawn. [out]
`y` : | address of the gint representing the vertical position where the menu shall be drawn. This is an output parameter. [out]
`push_in` : | This parameter controls how menus placed outside the monitor are handled. If this is set to `TRUE` and part of the menu is outside the monitor then GTK+ pushes the window into the visible area, effectively modifying the popup position. Note that moving and possibly resizing the menu around will alter the scroll position to keep the menu items "in place", i.e. at the same monitor position they would have been without resizing. In practice, this behavior is only useful for combobox popups or option menus and cannot be used to simply confine a menu to monitor boundaries. In that case, changing the scroll offset is not desirable. [out]
`user_data` : | the data supplied by the user in the `gtk_menu_popup()` `data` parameter.

### GtkMenuDetachFunc ()

    void                (*GtkMenuDetachFunc)                (GtkWidget *attach_widget,
                                                             GtkMenu *menu);

A user function supplied when calling `gtk_menu_attach_to_widget()` which will be called when the menu is later detached from the widget.

`attach_widget` : | the GtkWidget that the menu is being detached from.
`menu` : | the GtkMenu being detached.

## Property Details

### The `"accel-group"` property

      "accel-group"              GtkAccelGroup*        : Read / Write

The accel group holding accelerators for the menu.

Since 2.14

### The `"accel-path"` property

      "accel-path"               gchar*                : Read / Write

An accel path used to conveniently construct accel paths of child items.

Default value: NULL

Since 2.14

### The `"active"` property

      "active"                   gint                  : Read / Write

The index of the currently selected menu item, or -1 if no menu item is selected.

Allowed values: >= G_MAXULONG

Default value: -1

Since 2.14

### The `"attach-widget"` property

      "attach-widget"            GtkWidget*            : Read / Write

The widget the menu is attached to. Setting this property attaches the menu without a GtkMenuDetachFunc. If you need to use a detacher, use `gtk_menu_attach_to_widget()` directly.

Since 2.14

### The `"monitor"` property

      "monitor"                  gint                  : Read / Write

The monitor the menu will be popped up on.

Allowed values: >= G_MAXULONG

Default value: -1

Since 2.14

### The `"reserve-toggle-size"` property

      "reserve-toggle-size"      gboolean              : Read / Write

A boolean that indicates whether the menu reserves space for toggles and icons, regardless of their actual presence.

This property should only be changed from its default value for special-purposes such as tabular menus. Regular menus that are connected to a menu bar or context menus should reserve toggle space for consistency.

Default value: TRUE

Since 2.18

### The `"tearoff-state"` property

      "tearoff-state"            gboolean              : Read / Write

A boolean that indicates whether the menu is torn-off.

Default value: FALSE

Since 2.6

### The `"tearoff-title"` property

      "tearoff-title"            gchar*                : Read / Write

A title that may be displayed by the window manager when this menu is torn-off.

Default value: NULL

## Child Property Details

### The `"bottom-attach"` child property

      "bottom-attach"            gint                  : Read / Write

The row number to attach the bottom of the child to.

Allowed values: >= G_MAXULONG

Default value: -1

### The `"left-attach"` child property

      "left-attach"              gint                  : Read / Write

The column number to attach the left side of the child to.

Allowed values: >= G_MAXULONG

Default value: -1

### The `"right-attach"` child property

      "right-attach"             gint                  : Read / Write

The column number to attach the right side of the child to.

Allowed values: >= G_MAXULONG

Default value: -1

### The `"top-attach"` child property

      "top-attach"               gint                  : Read / Write

The row number to attach the top of the child to.

Allowed values: >= G_MAXULONG

Default value: -1

## Style Property Details

### The `"arrow-placement"` style property

      "arrow-placement"          GtkArrowPlacement     : Read

Indicates where scroll arrows should be placed.

Default value: GTK_ARROWS_BOTH

Since 2.16

### The `"arrow-scaling"` style property

      "arrow-scaling"            gfloat                : Read

Arbitrary constant to scale down the size of the scroll arrow.

Allowed values: [0,1]

Default value: 0.7

Since 2.16

### The `"double-arrows"` style property

      "double-arrows"            gboolean              : Read

When scrolling, always show both arrows.

Default value: TRUE

### The `"horizontal-offset"` style property

      "horizontal-offset"        gint                  : Read

When the menu is a submenu, position it this number of pixels offset horizontally.

Default value: -2

### The `"horizontal-padding"` style property

      "horizontal-padding"       gint                  : Read

Extra space at the left and right edges of the menu.

Allowed values: >= 0

Default value: 0

### The `"vertical-offset"` style property

      "vertical-offset"          gint                  : Read

When the menu is a submenu, position it this number of pixels offset vertically.

Default value: 0

### The `"vertical-padding"` style property

      "vertical-padding"         gint                  : Read

Extra space at the top and bottom of the menu.

Allowed values: >= 0

Default value: 1

## Signal Details

### The `"move-scroll"` signal

    void                user_function                      (GtkMenu      *menu,
                                                            GtkScrollType scroll_type,
                                                            gpointer      user_data)        : Action

`menu` : | a GtkMenu
`scroll_type` : | a GtkScrollType
`user_data` : | user data set when the signal handler was connected.