## GtkNotebook

GtkNotebook — A tabbed notebook container

## Synopsis

    #include <gtk/gtk.h>

    struct              GtkNotebook;
    GtkWidget *         gtk_notebook_new                    (void);
    gint                gtk_notebook_append_page            (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label);
    gint                gtk_notebook_append_page_menu       (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             GtkWidget *menu_label);
    gint                gtk_notebook_prepend_page           (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label);
    gint                gtk_notebook_prepend_page_menu      (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             GtkWidget *menu_label);
    gint                gtk_notebook_insert_page            (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             gint position);
    gint                gtk_notebook_insert_page_menu       (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             GtkWidget *menu_label,
                                                             gint position);
    void                gtk_notebook_remove_page            (GtkNotebook *notebook,
                                                             gint page_num);
    gint                gtk_notebook_page_num               (GtkNotebook *notebook,
                                                             GtkWidget *child);
    void                gtk_notebook_next_page              (GtkNotebook *notebook);
    void                gtk_notebook_prev_page              (GtkNotebook *notebook);
    void                gtk_notebook_reorder_child          (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             gint position);
    void                gtk_notebook_set_tab_pos            (GtkNotebook *notebook,
                                                             GtkPositionType pos);
    void                gtk_notebook_set_show_tabs          (GtkNotebook *notebook,
                                                             gboolean show_tabs);
    void                gtk_notebook_set_show_border        (GtkNotebook *notebook,
                                                             gboolean show_border);
    void                gtk_notebook_set_scrollable         (GtkNotebook *notebook,
                                                             gboolean scrollable);
    void                gtk_notebook_popup_enable           (GtkNotebook *notebook);
    void                gtk_notebook_popup_disable          (GtkNotebook *notebook);
    gint                gtk_notebook_get_current_page       (GtkNotebook *notebook);
    GtkWidget *         gtk_notebook_get_menu_label         (GtkNotebook *notebook,
                                                             GtkWidget *child);
    GtkWidget *         gtk_notebook_get_nth_page           (GtkNotebook *notebook,
                                                             gint page_num);
    gint                gtk_notebook_get_n_pages            (GtkNotebook *notebook);
    GtkWidget *         gtk_notebook_get_tab_label          (GtkNotebook *notebook,
                                                             GtkWidget *child);
    void                gtk_notebook_set_menu_label         (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *menu_label);
    void                gtk_notebook_set_menu_label_text    (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             const gchar *menu_text);
    void                gtk_notebook_set_tab_label          (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label);
    void                gtk_notebook_set_tab_label_text     (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             const gchar *tab_text);
    void                gtk_notebook_set_tab_reorderable    (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             gboolean reorderable);
    void                gtk_notebook_set_tab_detachable     (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             gboolean detachable);
    const gchar *       gtk_notebook_get_menu_label_text    (GtkNotebook *notebook,
                                                             GtkWidget *child);
    gboolean            gtk_notebook_get_scrollable         (GtkNotebook *notebook);
    gboolean            gtk_notebook_get_show_border        (GtkNotebook *notebook);
    gboolean            gtk_notebook_get_show_tabs          (GtkNotebook *notebook);
    const gchar *       gtk_notebook_get_tab_label_text     (GtkNotebook *notebook,
                                                             GtkWidget *child);
    GtkPositionType     gtk_notebook_get_tab_pos            (GtkNotebook *notebook);
    gboolean            gtk_notebook_get_tab_reorderable    (GtkNotebook *notebook,
                                                             GtkWidget *child);
    gboolean            gtk_notebook_get_tab_detachable     (GtkNotebook *notebook,
                                                             GtkWidget *child);
    guint16             gtk_notebook_get_tab_hborder        (GtkNotebook *notebook);
    guint16             gtk_notebook_get_tab_vborder        (GtkNotebook *notebook);
    void                gtk_notebook_set_current_page       (GtkNotebook *notebook,
                                                             gint page_num);
    void                gtk_notebook_set_group_name         (GtkNotebook *notebook,
                                                             const gchar *group_name);
    const gchar *       gtk_notebook_get_group_name         (GtkNotebook *notebook);
    void                gtk_notebook_set_action_widget      (GtkNotebook *notebook,
                                                             GtkWidget *widget,
                                                             GtkPackType pack_type);
    GtkWidget *         gtk_notebook_get_action_widget      (GtkNotebook *notebook,
                                                             GtkPackType pack_type);

## Object Hierarchy

      GObject
       +----GInitiallyUnowned
             +----GtkWidget
                   +----GtkContainer
                         +----GtkNotebook

## Implemented Interfaces

GtkNotebook implements AtkImplementorIface and GtkBuildable.

## Properties

      "enable-popup"             gboolean              : Read / Write
      "group-name"               gchar*                : Read / Write
      "page"                     gint                  : Read / Write
      "scrollable"               gboolean              : Read / Write
      "show-border"              gboolean              : Read / Write
      "show-tabs"                gboolean              : Read / Write
      "tab-pos"                  GtkPositionType       : Read / Write

## Child Properties

      "detachable"               gboolean              : Read / Write
      "menu-label"               gchar*                : Read / Write
      "position"                 gint                  : Read / Write
      "reorderable"              gboolean              : Read / Write
      "tab-expand"               gboolean              : Read / Write
      "tab-fill"                 gboolean              : Read / Write
      "tab-label"                gchar*                : Read / Write

## Style Properties

      "arrow-spacing"            gint                  : Read
      "has-backward-stepper"     gboolean              : Read
      "has-forward-stepper"      gboolean              : Read
      "has-secondary-backward-stepper" gboolean              : Read
      "has-secondary-forward-stepper" gboolean              : Read
      "initial-gap"              gint                  : Read
      "tab-curvature"            gint                  : Read
      "tab-overlap"              gint                  : Read

## Signals

      "change-current-page"                            : Action
      "create-window"                                  : Run Last
      "focus-tab"                                      : Action
      "move-focus-out"                                 : Action
      "page-added"                                     : Run Last
      "page-removed"                                   : Run Last
      "page-reordered"                                 : Run Last
      "reorder-tab"                                    : Action
      "select-page"                                    : Action
      "switch-page"                                    : Run Last

## Description

The GtkNotebook widget is a GtkContainer whose children are pages that can be switched between using tab labels along one edge.

There are many configuration options for GtkNotebook. Among other things, you can choose on which edge the tabs appear (see `gtk_notebook_set_tab_pos()`), whether, if there are too many tabs to fit the notebook should be made bigger or scrolling arrows added (see `gtk_notebook_set_scrollable()`), and whether there will be a popup menu allowing the users to switch pages. (see `gtk_notebook_popup_enable()`, `gtk_notebook_popup_disable()`)

### GtkNotebook as GtkBuildable

The GtkNotebook implementation of the GtkBuildable interface supports placing children into tabs by specifying "tab" as the "type" attribute of a <child> element. Note that the content of the tab must be created before the tab can be filled. A tab child can be specified without specifying a <child> type attribute.

To add a child widget in the notebooks action area, specify "action-start" or "action-end" as the "type" attribute of the <child> element.

Example 92. A UI definition fragment with GtkNotebook

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    <object class="GtkNotebook">
      <child>
        <object class="GtkLabel" id="notebook-content">
          <property name="label">Content</property>
        </object>
      </child>
      <child type="tab">
        <object class="GtkLabel" id="notebook-tab">
          <property name="label">Tab</property>
        </object>
      </child>
    </object>

## Details

### struct GtkNotebook

    struct GtkNotebook;

### gtk_notebook_new ()

    GtkWidget *         gtk_notebook_new                    (void);

Creates a new GtkNotebook widget with no pages.

Returns : | the newly created GtkNotebook

### gtk_notebook_append_page ()

    gint                gtk_notebook_append_page            (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label);

Appends a page to `notebook`.

`notebook` : | a GtkNotebook
`child` : | the GtkWidget to use as the contents of the page
`tab_label` : | the GtkWidget to be used as the label for the page, or `NULL` to use the default label, 'page N'. [allow-none]
Returns : | the index (starting from 0) of the appended page in the notebook, or -1 if function fails

### gtk_notebook_append_page_menu ()

    gint                gtk_notebook_append_page_menu       (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             GtkWidget *menu_label);

Appends a page to `notebook`, specifying the widget to use as the label in the popup menu.

`notebook` : | a GtkNotebook
`child` : | the GtkWidget to use as the contents of the page
`tab_label` : | the GtkWidget to be used as the label for the page, or `NULL` to use the default label, 'page N'. [allow-none]
`menu_label` : | the widget to use as a label for the page-switch menu, if that is enabled. If `NULL`, and `tab_label` is a GtkLabel or `NULL`, then the menu label will be a newly created label with the same text as `tab_label`; if `tab_label` is not a GtkLabel, `menu_label` must be specified if the page-switch menu is to be used. [allow-none]
Returns : | the index (starting from 0) of the appended page in the notebook, or -1 if function fails

### gtk_notebook_prepend_page ()

    gint                gtk_notebook_prepend_page           (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label);

Prepends a page to `notebook`.

`notebook` : | a GtkNotebook
`child` : | the GtkWidget to use as the contents of the page
`tab_label` : | the GtkWidget to be used as the label for the page, or `NULL` to use the default label, 'page N'. [allow-none]
Returns : | the index (starting from 0) of the prepended page in the notebook, or -1 if function fails

### gtk_notebook_prepend_page_menu ()

    gint                gtk_notebook_prepend_page_menu      (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             GtkWidget *menu_label);

Prepends a page to `notebook`, specifying the widget to use as the label in the popup menu.

`notebook` : | a GtkNotebook
`child` : | the GtkWidget to use as the contents of the page
`tab_label` : | the GtkWidget to be used as the label for the page, or `NULL` to use the default label, 'page N'. [allow-none]
`menu_label` : | the widget to use as a label for the page-switch menu, if that is enabled. If `NULL`, and `tab_label` is a GtkLabel or `NULL`, then the menu label will be a newly created label with the same text as `tab_label`; if `tab_label` is not a GtkLabel, `menu_label` must be specified if the page-switch menu is to be used. [allow-none]
Returns : | the index (starting from 0) of the prepended page in the notebook, or -1 if function fails

### gtk_notebook_insert_page ()

    gint                gtk_notebook_insert_page            (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             gint position);

Insert a page into `notebook` at the given position.

`notebook` : | a GtkNotebook
`child` : | the GtkWidget to use as the contents of the page
`tab_label` : | the GtkWidget to be used as the label for the page, or `NULL` to use the default label, 'page N'. [allow-none]
`position` : | the index (starting at 0) at which to insert the page, or -1 to append the page after all other pages
Returns : | the index (starting from 0) of the inserted page in the notebook, or -1 if function fails

### gtk_notebook_insert_page_menu ()

    gint                gtk_notebook_insert_page_menu       (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label,
                                                             GtkWidget *menu_label,
                                                             gint position);

Insert a page into `notebook` at the given position, specifying the widget to use as the label in the popup menu.

`notebook` : | a GtkNotebook
`child` : | the GtkWidget to use as the contents of the page
`tab_label` : | the GtkWidget to be used as the label for the page, or `NULL` to use the default label, 'page N'. [allow-none]
`menu_label` : | the widget to use as a label for the page-switch menu, if that is enabled. If `NULL`, and `tab_label` is a GtkLabel or `NULL`, then the menu label will be a newly created label with the same text as `tab_label`; if `tab_label` is not a GtkLabel, `menu_label` must be specified if the page-switch menu is to be used. [allow-none]
`position` : | the index (starting at 0) at which to insert the page, or -1 to append the page after all other pages.
Returns : | the index (starting from 0) of the inserted page in the notebook

### gtk_notebook_remove_page ()

    void                gtk_notebook_remove_page            (GtkNotebook *notebook,
                                                             gint page_num);

Removes a page from the notebook given its index in the notebook.

`notebook` : | a GtkNotebook
`page_num` : | the index of a notebook page, starting from 0. If -1, the last page will be removed.

### gtk_notebook_page_num ()

    gint                gtk_notebook_page_num               (GtkNotebook *notebook,
                                                             GtkWidget *child);

Finds the index of the page which contains the given child widget.

`notebook` : | a GtkNotebook
`child` : | a GtkWidget
Returns : | the index of the page containing `child`, or -1 if `child` is not in the notebook

### gtk_notebook_next_page ()

    void                gtk_notebook_next_page              (GtkNotebook *notebook);

Switches to the next page. Nothing happens if the current page is the last page.

`notebook` : | a GtkNotebook

### gtk_notebook_prev_page ()

    void                gtk_notebook_prev_page              (GtkNotebook *notebook);

Switches to the previous page. Nothing happens if the current page is the first page.

`notebook` : | a GtkNotebook

### gtk_notebook_reorder_child ()

    void                gtk_notebook_reorder_child          (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             gint position);

Reorders the page containing `child`, so that it appears in position `position`. If `position` is greater than or equal to the number of children in the list or negative, `child` will be moved to the end of the list.

`notebook` : | a GtkNotebook
`child` : | the child to move
`position` : | the new position, or -1 to move to the end

### gtk_notebook_set_tab_pos ()

    void                gtk_notebook_set_tab_pos            (GtkNotebook *notebook,
                                                             GtkPositionType pos);

Sets the edge at which the tabs for switching pages in the notebook are drawn.

`notebook` : | a GtkNotebook.
`pos` : | the edge to draw the tabs at

### gtk_notebook_set_show_tabs ()

    void                gtk_notebook_set_show_tabs          (GtkNotebook *notebook,
                                                             gboolean show_tabs);

Sets whether to show the tabs for the notebook or not.

`notebook` : | a GtkNotebook
`show_tabs` : | `TRUE` if the tabs should be shown

### gtk_notebook_set_show_border ()

    void                gtk_notebook_set_show_border        (GtkNotebook *notebook,
                                                             gboolean show_border);

Sets whether a bevel will be drawn around the notebook pages. This only has a visual effect when the tabs are not shown. See `gtk_notebook_set_show_tabs()`.

`notebook` : | a GtkNotebook
`show_border` : | `TRUE` if a bevel should be drawn around the notebook

### gtk_notebook_set_scrollable ()

    void                gtk_notebook_set_scrollable         (GtkNotebook *notebook,
                                                             gboolean scrollable);

Sets whether the tab label area will have arrows for scrolling if there are too many tabs to fit in the area.

`notebook` : | a GtkNotebook
`scrollable` : | `TRUE` if scroll arrows should be added

### gtk_notebook_popup_enable ()

    void                gtk_notebook_popup_enable           (GtkNotebook *notebook);

Enables the popup menu: if the user clicks with the right mouse button on the tab labels, a menu with all the pages will be popped up.

`notebook` : | a GtkNotebook

### gtk_notebook_popup_disable ()

    void                gtk_notebook_popup_disable          (GtkNotebook *notebook);

Disables the popup menu.

`notebook` : | a GtkNotebook

### gtk_notebook_get_current_page ()

    gint                gtk_notebook_get_current_page       (GtkNotebook *notebook);

Returns the page number of the current page.

`notebook` : | a GtkNotebook
Returns : | the index (starting from 0) of the current page in the notebook. If the notebook has no pages, then -1 will be returned.

### gtk_notebook_get_menu_label ()

    GtkWidget *         gtk_notebook_get_menu_label         (GtkNotebook *notebook,
                                                             GtkWidget *child);

Retrieves the menu label widget of the page containing `child`.

`notebook` : | a GtkNotebook
`child` : | a widget contained in a page of `notebook`
Returns : | the menu label, or `NULL` if the notebook page does not have a menu label other than the default (the tab label). [transfer none]

### gtk_notebook_get_nth_page ()

    GtkWidget *         gtk_notebook_get_nth_page           (GtkNotebook *notebook,
                                                             gint page_num);

Returns the child widget contained in page number `page_num`.

`notebook` : | a GtkNotebook
`page_num` : | the index of a page in the notebook, or -1 to get the last page
Returns : | the child widget, or `NULL` if `page_num` is out of bounds. [transfer none]

### gtk_notebook_get_n_pages ()

    gint                gtk_notebook_get_n_pages            (GtkNotebook *notebook);

Gets the number of pages in a notebook.

`notebook` : | a GtkNotebook
Returns : | the number of pages in the notebook

Since 2.2

### gtk_notebook_get_tab_label ()

    GtkWidget *         gtk_notebook_get_tab_label          (GtkNotebook *notebook,
                                                             GtkWidget *child);

Returns the tab label widget for the page `child`. `NULL` is returned if `child` is not in `notebook` or if no tab label has specifically been set for `child`.

`notebook` : | a GtkNotebook
`child` : | the page
Returns : | the tab label. [transfer none]

### gtk_notebook_set_menu_label ()

    void                gtk_notebook_set_menu_label         (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *menu_label);

Changes the menu label for the page containing `child`.

`notebook` : | a GtkNotebook
`child` : | the child widget
`menu_label` : | the menu label, or `NULL` for default. [allow-none]

### gtk_notebook_set_menu_label_text ()

    void                gtk_notebook_set_menu_label_text    (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             const gchar *menu_text);

Creates a new label and sets it as the menu label of `child`.

`notebook` : | a GtkNotebook
`child` : | the child widget
`menu_text` : | the label text

### gtk_notebook_set_tab_label ()

    void                gtk_notebook_set_tab_label          (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             GtkWidget *tab_label);

Changes the tab label for `child`. If `NULL` is specified for `tab_label`, then the page will have the label 'page N'.

`notebook` : | a GtkNotebook
`child` : | the page
`tab_label` : | the tab label widget to use, or `NULL` for default tab label. [allow-none]

### gtk_notebook_set_tab_label_text ()

    void                gtk_notebook_set_tab_label_text     (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             const gchar *tab_text);

Creates a new label and sets it as the tab label for the page containing `child`.

`notebook` : | a GtkNotebook
`child` : | the page
`tab_text` : | the label text

### gtk_notebook_set_tab_reorderable ()

    void                gtk_notebook_set_tab_reorderable    (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             gboolean reorderable);

Sets whether the notebook tab can be reordered via drag and drop or not.

`notebook` : | a GtkNotebook
`child` : | a child GtkWidget
`reorderable` : | whether the tab is reorderable or not

Since 2.10

### gtk_notebook_set_tab_detachable ()

    void                gtk_notebook_set_tab_detachable     (GtkNotebook *notebook,
                                                             GtkWidget *child,
                                                             gboolean detachable);

Sets whether the tab can be detached from `notebook` to another notebook or widget.

Note that 2 notebooks must share a common group identificator (see `gtk_notebook_set_group_name()`) to allow automatic tabs interchange between them.

If you want a widget to interact with a notebook through DnD (i.e.: accept dragged tabs from it) it must be set as a drop destination and accept the target "GTK_NOTEBOOK_TAB". The notebook will fill the selection with a GtkWidget** pointing to the child widget that corresponds to the dropped tab.

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    static void
    on_drop_zone_drag_data_received (GtkWidget        *widget,
                                     GdkDragContext   *context,
                                     gint              x,
                                     gint              y,
                                     GtkSelectionData *selection_data,
                                     guint             info,
                                     guint             time,
                                     gpointer          user_data)
    {
      GtkWidget *notebook;
      GtkWidget **child;

      notebook = gtk_drag_get_source_widget (context);
      child = (void*) gtk_selection_data_get_data (selection_data);

      process_widget (*child);
      gtk_container_remove (GTK_CONTAINER (notebook), *child);
    }

If you want a notebook to accept drags from other widgets, you will have to set your own DnD code to do it.

`notebook` : | a GtkNotebook
`child` : | a child GtkWidget
`detachable` : | whether the tab is detachable or not

Since 2.10

### gtk_notebook_get_menu_label_text ()

    const gchar *       gtk_notebook_get_menu_label_text    (GtkNotebook *notebook,
                                                             GtkWidget *child);

Retrieves the text of the menu label for the page containing `child`.

`notebook` : | a GtkNotebook
`child` : | the child widget of a page of the notebook.
Returns : | the text of the tab label, or `NULL` if the widget does not have a menu label other than the default menu label, or the menu label widget is not a GtkLabel. The string is owned by the widget and must not be freed.

### gtk_notebook_get_scrollable ()

    gboolean            gtk_notebook_get_scrollable         (GtkNotebook *notebook);

Returns whether the tab label area has arrows for scrolling. See `gtk_notebook_set_scrollable()`.

`notebook` : | a GtkNotebook
Returns : | `TRUE` if arrows for scrolling are present

### gtk_notebook_get_show_border ()

    gboolean            gtk_notebook_get_show_border        (GtkNotebook *notebook);

Returns whether a bevel will be drawn around the notebook pages. See `gtk_notebook_set_show_border()`.

`notebook` : | a GtkNotebook
Returns : | `TRUE` if the bevel is drawn

### gtk_notebook_get_show_tabs ()

    gboolean            gtk_notebook_get_show_tabs          (GtkNotebook *notebook);

Returns whether the tabs of the notebook are shown. See `gtk_notebook_set_show_tabs()`.

`notebook` : | a GtkNotebook
Returns : | `TRUE` if the tabs are shown

### gtk_notebook_get_tab_label_text ()

    const gchar *       gtk_notebook_get_tab_label_text     (GtkNotebook *notebook,
                                                             GtkWidget *child);

Retrieves the text of the tab label for the page containing `child`.

`notebook` : | a GtkNotebook
`child` : | a widget contained in a page of `notebook`
Returns : | the text of the tab label, or `NULL` if the tab label widget is not a GtkLabel. The string is owned by the widget and must not be freed.

### gtk_notebook_get_tab_pos ()

    GtkPositionType     gtk_notebook_get_tab_pos            (GtkNotebook *notebook);

Gets the edge at which the tabs for switching pages in the notebook are drawn.

`notebook` : | a GtkNotebook
Returns : | the edge at which the tabs are drawn

### gtk_notebook_get_tab_reorderable ()

    gboolean            gtk_notebook_get_tab_reorderable    (GtkNotebook *notebook,
                                                             GtkWidget *child);

Gets whether the tab can be reordered via drag and drop or not.

`notebook` : | a GtkNotebook
`child` : | a child GtkWidget
Returns : | `TRUE` if the tab is reorderable.

Since 2.10

### gtk_notebook_get_tab_detachable ()

    gboolean            gtk_notebook_get_tab_detachable     (GtkNotebook *notebook,
                                                             GtkWidget *child);

Returns whether the tab contents can be detached from `notebook`.

`notebook` : | a GtkNotebook
`child` : | a child GtkWidget
Returns : | `TRUE` if the tab is detachable.

Since 2.10

### gtk_notebook_get_tab_hborder ()

    guint16             gtk_notebook_get_tab_hborder        (GtkNotebook *notebook);

Returns the horizontal width of a tab border.

`notebook` : | a GtkNotebook
Returns : | horizontal width of a tab border

Since 2.22

### gtk_notebook_get_tab_vborder ()

    guint16             gtk_notebook_get_tab_vborder        (GtkNotebook *notebook);

Returns the vertical width of a tab border.

`notebook` : | a GtkNotebook
Returns : | vertical width of a tab border

Since 2.22

### gtk_notebook_set_current_page ()

    void                gtk_notebook_set_current_page       (GtkNotebook *notebook,
                                                             gint page_num);

Switches to the page number `page_num`.

Note that due to historical reasons, GtkNotebook refuses to switch to a page unless the child widget is visible. Therefore, it is recommended to show child widgets before adding them to a notebook.

`notebook` : | a GtkNotebook
`page_num` : | index of the page to switch to, starting from 0. If negative, the last page will be used. If greater than the number of pages in the notebook, nothing will be done.

### gtk_notebook_set_group_name ()

    void                gtk_notebook_set_group_name         (GtkNotebook *notebook,
                                                             const gchar *group_name);

Sets a group name for `notebook`.

Notebooks with the same name will be able to exchange tabs via drag and drop. A notebook with a `NULL` group name will not be able to exchange tabs with any other notebook.

`notebook` : | a GtkNotebook
`group_name` : | the name of the notebook group, or `NULL` to unset it. [allow-none]

Since 2.24

### gtk_notebook_get_group_name ()

    const gchar *       gtk_notebook_get_group_name         (GtkNotebook *notebook);

Gets the current group name for `notebook`.

`notebook` : | a GtkNotebook
Returns : | the group name, or `NULL` if none is set. [transfer none]

Since 2.24

### gtk_notebook_set_action_widget ()

    void                gtk_notebook_set_action_widget      (GtkNotebook *notebook,
                                                             GtkWidget *widget,
                                                             GtkPackType pack_type);

Sets `widget` as one of the action widgets. Depending on the pack type the widget will be placed before or after the tabs. You can use a GtkBox if you need to pack more than one widget on the same side.

Note that action widgets are "internal" children of the notebook and thus not included in the list returned from `gtk_container_foreach()`.

`notebook` : | a GtkNotebook
`widget` : | a GtkWidget
`pack_type` : | pack type of the action widget

Since 2.20

### gtk_notebook_get_action_widget ()

    GtkWidget *         gtk_notebook_get_action_widget      (GtkNotebook *notebook,
                                                             GtkPackType pack_type);

Gets one of the action widgets. See `gtk_notebook_set_action_widget()`.

`notebook` : | a GtkNotebook
`pack_type` : | pack type of the action widget to receive
Returns : | The action widget with the given `pack_type` or `NULL` when this action widget has not been set. [transfer none]

Since 2.20

## Property Details

### The `"enable-popup"` property

      "enable-popup"             gboolean              : Read / Write

If TRUE, pressing the right mouse button on the notebook pops up a menu that you can use to go to a page.

Default value: FALSE

### The `"group-name"` property

      "group-name"               gchar*                : Read / Write

Group name for tab drag and drop.

Default value: NULL

Since 2.24

### The `"page"` property

      "page"                     gint                  : Read / Write

The index of the current page.

Allowed values: >= G_MAXULONG

Default value: -1

### The `"scrollable"` property

      "scrollable"               gboolean              : Read / Write

If TRUE, scroll arrows are added if there are too many tabs to fit.

Default value: FALSE

### The `"show-border"` property

      "show-border"              gboolean              : Read / Write

Whether the border should be shown.

Default value: TRUE

### The `"show-tabs"` property

      "show-tabs"                gboolean              : Read / Write

Whether tabs should be shown.

Default value: TRUE

### The `"tab-pos"` property

      "tab-pos"                  GtkPositionType       : Read / Write

Which side of the notebook holds the tabs.

Default value: GTK_POS_TOP

## Child Property Details

### The `"detachable"` child property

      "detachable"               gboolean              : Read / Write

Whether the tab is detachable.

Default value: FALSE

### The `"menu-label"` child property

      "menu-label"               gchar*                : Read / Write

The string displayed in the child's menu entry.

Default value: NULL

### The `"position"` child property

      "position"                 gint                  : Read / Write

The index of the child in the parent.

Allowed values: >= G_MAXULONG

Default value: 0

### The `"reorderable"` child property

      "reorderable"              gboolean              : Read / Write

Whether the tab is reorderable by user action.

Default value: FALSE

### The `"tab-expand"` child property

      "tab-expand"               gboolean              : Read / Write

Whether to expand the child's tab.

Default value: FALSE

### The `"tab-fill"` child property

      "tab-fill"                 gboolean              : Read / Write

Whether the child's tab should fill the allocated area.

Default value: TRUE

### The `"tab-label"` child property

      "tab-label"                gchar*                : Read / Write

The string displayed on the child's tab label.

Default value: NULL

## Style Property Details

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

      "arrow-spacing"            gint                  : Read

The "arrow-spacing" property defines the spacing between the scroll arrows and the tabs.

Allowed values: >= 0

Default value: 0

Since 2.10

### The `"has-backward-stepper"` style property

      "has-backward-stepper"     gboolean              : Read

The "has-backward-stepper" property determines whether the standard backward arrow button is displayed.

Default value: TRUE

Since 2.4

### The `"has-forward-stepper"` style property

      "has-forward-stepper"      gboolean              : Read

The "has-forward-stepper" property determines whether the standard forward arrow button is displayed.

Default value: TRUE

Since 2.4

### The `"has-secondary-backward-stepper"` style property

      "has-secondary-backward-stepper" gboolean              : Read

The "has-secondary-backward-stepper" property determines whether a second backward arrow button is displayed on the opposite end of the tab area.

Default value: FALSE

Since 2.4

### The `"has-secondary-forward-stepper"` style property

      "has-secondary-forward-stepper" gboolean              : Read

The "has-secondary-forward-stepper" property determines whether a second forward arrow button is displayed on the opposite end of the tab area.

Default value: FALSE

Since 2.4

### The `"initial-gap"` style property

      "initial-gap"              gint                  : Read

The "initial-gap" property defines the minimum size for the initial gap between the first tab.

Allowed values: >= 0

Default value: 0

Since 3.2

### The `"tab-curvature"` style property

      "tab-curvature"            gint                  : Read

The "tab-curvature" property defines size of tab curvature.

Allowed values: >= 0

Default value: 1

Since 2.10

### The `"tab-overlap"` style property

      "tab-overlap"              gint                  : Read

The "tab-overlap" property defines size of tab overlap area.

Default value: 2

Since 2.10

## Signal Details

### The `"change-current-page"` signal

    gboolean            user_function                      (GtkNotebook *notebook,
                                                            gint         arg1,
                                                            gpointer     user_data)      : Action

### The `"create-window"` signal

    GtkNotebook*        user_function                      (GtkNotebook *notebook,
                                                            GtkWidget   *page,
                                                            gint         x,
                                                            gint         y,
                                                            gpointer     user_data)      : Run Last

The ::create-window signal is emitted when a detachable tab is dropped on the root window.

A handler for this signal can create a window containing a notebook where the tab will be attached. It is also responsible for moving/resizing the window and adding the necessary properties to the notebook (e.g. the "group" ).

`notebook` : | the GtkNotebook emitting the signal
`page` : | the tab of `notebook` that is being detached
`x` : | the X coordinate where the drop happens
`y` : | the Y coordinate where the drop happens
`user_data` : | user data set when the signal handler was connected.
Returns : | a GtkNotebook that `page` should be added to, or `NULL`. [transfer none]

Since 2.12

### The `"focus-tab"` signal

    gboolean            user_function                      (GtkNotebook   *notebook,
                                                            GtkNotebookTab arg1,
                                                            gpointer       user_data)      : Action

### The `"move-focus-out"` signal

    void                user_function                      (GtkNotebook     *notebook,
                                                            GtkDirectionType arg1,
                                                            gpointer         user_data)      : Action

### The `"page-added"` signal

    void                user_function                      (GtkNotebook *notebook,
                                                            GtkWidget   *child,
                                                            guint        page_num,
                                                            gpointer     user_data)      : Run Last

the ::page-added signal is emitted in the notebook right after a page is added to the notebook.

`notebook` : | the GtkNotebook
`child` : | the child GtkWidget affected
`page_num` : | the new page number for `child`
`user_data` : | user data set when the signal handler was connected.

Since 2.10

### The `"page-removed"` signal

    void                user_function                      (GtkNotebook *notebook,
                                                            GtkWidget   *child,
                                                            guint        page_num,
                                                            gpointer     user_data)      : Run Last

the ::page-removed signal is emitted in the notebook right after a page is removed from the notebook.

`notebook` : | the GtkNotebook
`child` : | the child GtkWidget affected
`page_num` : | the `child` page number
`user_data` : | user data set when the signal handler was connected.

Since 2.10

### The `"page-reordered"` signal

    void                user_function                      (GtkNotebook *notebook,
                                                            GtkWidget   *child,
                                                            guint        page_num,
                                                            gpointer     user_data)      : Run Last

the ::page-reordered signal is emitted in the notebook right after a page has been reordered.

`notebook` : | the GtkNotebook
`child` : | the child GtkWidget affected
`page_num` : | the new page number for `child`
`user_data` : | user data set when the signal handler was connected.

Since 2.10

### The `"reorder-tab"` signal

    gboolean            user_function                      (GtkNotebook     *notebook,
                                                            GtkDirectionType arg1,
                                                            gboolean         arg2,
                                                            gpointer         user_data)      : Action

### The `"select-page"` signal

    gboolean            user_function                      (GtkNotebook *notebook,
                                                            gboolean     arg1,
                                                            gpointer     user_data)      : Action

### The `"switch-page"` signal

    void                user_function                      (GtkNotebook *notebook,
                                                            GtkWidget   *page,
                                                            guint        page_num,
                                                            gpointer     user_data)      : Run Last

Emitted when the user or a function changes the current page.

`notebook` : | the object which received the signal.
`page` : | the new current page
`page_num` : | the index of the page
`user_data` : | user data set when the signal handler was connected.

## See Also

GtkContainer