gtkmm: Gtk::Box Class Reference

gtkmm 4.0.1

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Gtk::Box Class Reference

A container for packing widgets in a single row or column. More...

`#include <gtkmm/box.h>`

Inheritance diagram for Gtk::Box:
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## Public Member Functions
| Box (Box&& src) noexcept
Box& | operator= (Box&& src) noexcept
| Box (const Box&)=delete
Box& | operator= (const Box&)=delete
| ~Box () noexcept override
GtkBox* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkBox* | gobj () const
| Provides access to the underlying C GObject. More...
| Box (Orientation orientation=Orientation::HORIZONTAL, int spacing=0)
| Creates a new box. More...
void | set_homogeneous (bool homogeneous=true)
| Sets the Gtk::Box::property_homogeneous() property of box, controlling whether or not all children of box are given equal space in the box. More...
bool | get_homogeneous () const
| Returns whether the box is homogeneous (all children are the same size). More...
void | set_spacing (int spacing)
| Sets the Gtk::Box::property_spacing() property of box, which is the number of pixels to place between children of box. More...
int | get_spacing () const
| Gets the value set by set_spacing(). More...
void | set_baseline_position (BaselinePosition position)
| Sets the baseline position of a box. More...
BaselinePosition | get_baseline_position () const
| Gets the value set by set_baseline_position(). More...
void | append (Gtk::Widget& child)
| Adds child as the last child to box. More...
void | prepend (Gtk::Widget& child)
| Adds child as the first child to box. More...
void | remove (Gtk::Widget& child)
| Removes a child widget from box, after it has been added with append(), prepend(), or insert_child_after(). More...
void | insert_child_after (Widget& child, const Widget& sibling)
| Inserts child in the position after sibling in the list of children. More...
void | insert_child_at_start (Widget& child)
| Inserts child in the first position in the list of children. More...
void | reorder_child_after (Widget& child, const Widget& sibling)
| Moves child to the position after sibling in the list of children. More...
void | reorder_child_at_start (Widget& child)
| Moves child to the first position in the list of children. More...
Glib::PropertyProxy< int > | property_spacing ()
| The amount of space between children. More...
Glib::PropertyProxy_ReadOnly< int > | property_spacing () const
| The amount of space between children. More...
Glib::PropertyProxy< bool > | property_homogeneous ()
| Whether the children should all be the same size. More...
Glib::PropertyProxy_ReadOnly< bool > | property_homogeneous () const
| Whether the children should all be the same size. More...
Glib::PropertyProxy< BaselinePosition > | property_baseline_position ()
| The position of the baseline aligned widgets if extra space is available. More...
Glib::PropertyProxy_ReadOnly< BaselinePosition > | property_baseline_position () const
| The position of the baseline aligned widgets if extra space is available. More...
Public Member Functions inherited from Gtk::Widget
| Widget (Widget&& src) noexcept
Widget& | operator= (Widget&& src) noexcept
| Widget (const Widget&)=delete
Widget& | operator= (const Widget&)=delete
| ~Widget () noexcept override
| Destroys the widget. More...
GtkWidget* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkWidget* | gobj () const
| Provides access to the underlying C GObject. More...
Glib::RefPtr< ConstraintTarget > | make_refptr_constrainttarget ()
| Converts this widget to a reference counted Gtk::ConstraintTarget. More...
Glib::RefPtr< const ConstraintTarget > | make_refptr_constrainttarget () const
| Converts this widget to a reference counted Gtk::ConstraintTarget. More...
void | show ()
| Flags a widget to be displayed. More...
void | hide ()
| Reverses the effects of show(), causing the widget to be hidden (invisible to the user). More...
void | queue_draw ()
| Schedules this widget to be redrawn in paint phase of the current or the next frame. More...
void | queue_resize ()
| This function is only for use in widget implementations. More...
void | queue_allocate ()
| This function is only for use in widget implementations. More...
void | size_allocate (const Allocation& allocation, int baseline)
| This is a simple form of allocate() that takes the new position of widget as part of allocation. More...
SizeRequestMode | get_request_mode () const
| Gets whether the widget prefers a height-for-width layout or a width-for-height layout. More...
void | measure (Orientation orientation, int for_size, int& minimum, int& natural, int& minimum_baseline, int& natural_baseline) const
| Measures widget in the orientation orientation and for the given for_size. More...
void | get_preferred_size (Requisition& minimum_size, Requisition& natural_size) const
| Retrieves the minimum and natural size of a widget, taking into account the widget’s preference for height-for-width management. More...
void | set_layout_manager (const Glib::RefPtr< LayoutManager >& layout_manager)
| Sets the layout manager delegate instance that provides an implementation for measuring and allocating the children of widget. More...
void | unset_layout_manager ()
| Undoes the effect of a previous call to set_layout_manager(). More...
Glib::RefPtr< LayoutManager > | get_layout_manager ()
| Retrieves the layout manager set using set_layout_manager(). More...
Glib::RefPtr< const LayoutManager > | get_layout_manager () const
| Retrieves the layout manager set using set_layout_manager(). More...
bool | mnemonic_activate (bool group_cycling)
| Emits the Gtk::Widget::signal_mnemonic_activate() signal. More...
bool | activate ()
| For widgets that can be “activated” (buttons, menu items, etc.) this function activates them. More...
void | set_can_focus (bool can_focus=true)
| Specifies whether the input focus can enter the widget or any of its children. More...
bool | get_can_focus () const
| Determines whether the input focus can enter widget or any of its children. More...
void | set_focusable (bool focusable=true)
| Specifies whether widget can own the input focus. More...
bool | get_focusable () const
| Determines whether widget can own the input focus. More...
bool | has_focus () const
| Determines if the widget has the global input focus. More...
bool | is_focus () const
| Determines if the widget is the focus widget within its toplevel. More...
bool | has_visible_focus () const
| Determines if the widget should show a visible indication that it has the global input focus. More...
bool | grab_focus ()
| Causes widget (or one of its descendents) to have the keyboard focus for the Gtk::Window it's inside. More...
void | set_focus_on_click (bool focus_on_click=true)
| Sets whether the widget should grab focus when it is clicked with the mouse. More...
bool | get_focus_on_click () const
| Returns whether the widget should grab focus when it is clicked with the mouse. More...
void | set_can_target (bool can_target=true)
| Sets whether widget can be the target of pointer events. More...
bool | get_can_target () const
| Queries whether widget can be the target of pointer events. More...
bool | has_default () const
| Determines whether widget is the current default widget within its toplevel. More...
void | set_receives_default (bool receives_default=true)
| Specifies whether widget will be treated as the default widget within its toplevel when it has the focus, even if another widget is the default. More...
bool | get_receives_default () const
| Determines whether widget is always treated as the default widget within its toplevel when it has the focus, even if another widget is the default. More...
void | set_name (const Glib::ustring& name)
| Widgets can be named, which allows you to refer to them from a CSS file. More...
void | unset_name ()
Glib::ustring | get_name () const
| Retrieves the name of a widget. More...
void | set_state_flags (StateFlags flags, bool clear=true)
| This function is for use in widget implementations. More...
void | unset_state_flags (StateFlags flags)
| This function is for use in widget implementations. More...
StateFlags | get_state_flags () const
| Returns the widget state as a flag set. More...
void | set_sensitive (bool sensitive=true)
| Sets the sensitivity of a widget. More...
bool | get_sensitive () const
| Returns the widget’s sensitivity (in the sense of returning the value that has been set using set_sensitive()). More...
bool | is_sensitive () const
| Returns the widget’s effective sensitivity, which means it is sensitive itself and also its parent widget is sensitive. More...
void | set_visible (bool visible=true)
| Sets the visibility state of widget. More...
bool | get_visible () const
| Determines whether the widget is visible. More...
bool | is_visible () const
| Determines whether the widget and all its parents are marked as visible. More...
bool | is_drawable () const
| Determines whether widget can be drawn to. More...
bool | get_realized () const
| Determines whether widget is realized. More...
bool | get_mapped () const
| Whether the widget is mapped. More...
void | set_child_visible (bool visible=true)
| Sets whether widget should be mapped along with its when its parent is mapped and widget has been shown with show(). More...
bool | get_child_visible () const
| Gets the value set with set_child_visible(). More...
int | get_allocated_width () const
| Returns the width that has currently been allocated to widget. More...
int | get_allocated_height () const
| Returns the height that has currently been allocated to widget. More...
int | get_allocated_baseline () const
| Returns the baseline that has currently been allocated to widget. More...
Allocation | get_allocation () const
| Retrieves the widget’s location. More...
int | get_width () const
| Returns the content width of the widget, as passed to its size-allocate implementation. More...
int | get_height () const
| Returns the content height of the widget, as passed to its size-allocate implementation. More...
int | get_size (Orientation orientation) const
| Returns the content width or height of the widget, depending on orientation. More...
Widget* | get_parent ()
| Returns the parent widget of widget. More...
const Widget* | get_parent () const
| Returns the parent widget of widget. More...
Root* | get_root ()
| Returns the Gtk::Root widget of widget or `nullptr` if the widget is not contained inside a widget tree with a root widget. More...
const Root* | get_root () const
| Returns the Gtk::Root widget of widget or `nullptr` if the widget is not contained inside a widget tree with a root widget. More...
Native* | get_native ()
| Returns the GtkNative widget that contains widget, or `nullptr` if the widget is not contained inside a widget tree with a native ancestor. More...
const Native* | get_native () const
| Returns the GtkNative widget that contains widget, or `nullptr` if the widget is not contained inside a widget tree with a native ancestor. More...
bool | child_focus (DirectionType direction)
| This function is used by custom widget implementations; if you're writing an app, you’d use grab_focus() to move the focus to a particular widget. More...
bool | keynav_failed (DirectionType direction)
| This function should be called whenever keyboard navigation within a single widget hits a boundary. More...
void | error_bell ()
| Notifies the user about an input-related error on this widget. More...
void | set_size_request (int width=-1, int height=-1)
| Sets the minimum size of a widget; that is, the widget’s size request will be at least width by height. More...
void | get_size_request (int& width, int& height) const
| Gets the size request that was explicitly set for the widget using set_size_request(). More...
void | set_opacity (double opacity)
| Request the widget to be rendered partially transparent, with opacity 0 being fully transparent and 1 fully opaque. More...
double | get_opacity () const
| Fetches the requested opacity for this widget. More...
void | set_overflow (Overflow overflow)
| Sets how widget treats content that is drawn outside the widget's content area. More...
Overflow | get_overflow () const
| Returns the value set via set_overflow(). More...
Widget* | get_ancestor (GType widget_type)
| Gets the first ancestor of widget with type widget_type. More...
const Widget* | get_ancestor (GType widget_type) const
| Gets the first ancestor of widget with type widget_type. More...
int | get_scale_factor () const
| Retrieves the internal scale factor that maps from window coordinates to the actual device pixels. More...
Glib::RefPtr< Gdk::Display > | get_display ()
| Get the Gdk::Display for the toplevel window associated with this widget. More...
Glib::RefPtr< const Gdk::Display > | get_display () const
| Get the Gdk::Display for the toplevel window associated with this widget. More...
Glib::RefPtr< Settings > | get_settings ()
| Gets the settings object holding the settings used for this widget. More...
Glib::RefPtr< Gdk::Clipboard > | get_clipboard ()
| This is a utility function to get the clipboard object for the Gdk::Display that widget is using. More...
Glib::RefPtr< const Gdk::Clipboard > | get_clipboard () const
| This is a utility function to get the clipboard object for the Gdk::Display that widget is using. More...
Glib::RefPtr< Gdk::Clipboard > | get_primary_clipboard ()
| This is a utility function to get the primary clipboard object for the Gdk::Display that widget is using. More...
Glib::RefPtr< const Gdk::Clipboard > | get_primary_clipboard () const
| This is a utility function to get the primary clipboard object for the Gdk::Display that widget is using. More...
bool | get_hexpand () const
| Gets whether the widget would like any available extra horizontal space. More...
void | set_hexpand (bool expand=true)
| Sets whether the widget would like any available extra horizontal space. More...
bool | get_hexpand_set () const
| Gets whether set_hexpand() has been used to explicitly set the expand flag on this widget. More...
void | set_hexpand_set (bool set=true)
| Sets whether the hexpand flag (see get_hexpand()) will be used. More...
bool | get_vexpand () const
| Gets whether the widget would like any available extra vertical space. More...
void | set_vexpand (bool expand=true)
| Sets whether the widget would like any available extra vertical space. More...
bool | get_vexpand_set () const
| Gets whether set_vexpand() has been used to explicitly set the expand flag on this widget. More...
void | set_vexpand_set (bool set=true)
| Sets whether the vexpand flag (see get_vexpand()) will be used. More...
bool | compute_expand (Orientation orientation)
| Computes whether a container should give this widget extra space when possible. More...
void | set_expand (bool expand=true)
| Sets whether the widget would like any available extra space in both directions. More...
Align | get_halign () const
| Gets the value of the Gtk::Widget::property_halign() property. More...
void | set_halign (Align align)
| Sets the horizontal alignment of widget. More...
Align | get_valign () const
| Gets the value of the Gtk::Widget::property_valign() property. More...
void | set_valign (Align align)
| Sets the vertical alignment of widget. More...
int | get_margin_start () const
| Gets the value of the Gtk::Widget::property_margin_start() property. More...
void | set_margin_start (int margin)
| Sets the start margin of widget. More...
int | get_margin_end () const
| Gets the value of the Gtk::Widget::property_margin_end() property. More...
void | set_margin_end (int margin)
| Sets the end margin of widget. More...
int | get_margin_top () const
| Gets the value of the Gtk::Widget::property_margin_top() property. More...
void | set_margin_top (int margin)
| Sets the top margin of widget. More...
int | get_margin_bottom () const
| Gets the value of the Gtk::Widget::property_margin_bottom() property. More...
void | set_margin_bottom (int margin)
| Sets the bottom margin of widget. More...
void | set_margin (int margin)
| Set all 4 margins to the same value. More...
bool | is_ancestor (Widget& ancestor) const
| Determines whether widget is somewhere inside ancestor, possibly with intermediate containers. More...
bool | translate_coordinates (Widget& dest_widget, double src_x, double src_y, double& dest_x, double& dest_y)
| Translate coordinates relative to src_widget’s allocation to coordinates relative to dest_widget’s allocations. More...
bool | contains (double x, double y) const
| Tests if the point at ( x, y) is contained in widget. More...
Widget* | pick (double x, double y, PickFlags flags=PickFlags::DEFAULT)
| Finds the descendant of widget (including widget itself) closest to the screen at the point ( x, y). More...
const Widget* | pick (double x, double y, PickFlags flags=PickFlags::DEFAULT) const
| Finds the descendant of widget (including widget itself) closest to the screen at the point ( x, y). More...
void | add_controller (const Glib::RefPtr< EventController >& controller)
| Adds controller to widget so that it will receive events. More...
void | remove_controller (const Glib::RefPtr< EventController >& controller)
| Removes controller from widget, so that it doesn't process events anymore. More...
Glib::RefPtr< Pango::Context > | create_pango_context ()
| Creates a new Pango::Context with the appropriate font map, font options, font description, and base direction for drawing text for this widget. More...
Glib::RefPtr< Pango::Context > | get_pango_context ()
| Gets a Pango::Context with the appropriate font map, font description, and base direction for this widget. More...
void | set_font_options (const Cairo::FontOptions& options)
| Sets the #cairo_font_options_t used for Pango rendering in this widget. More...
void | unset_font_options ()
| Undoes the effect of previous calls to set_font_options(). More...
Cairo::FontOptions | get_font_options () const
| Returns the #cairo_font_options_t used for Pango rendering. More...
Glib::RefPtr< Pango::Layout > | create_pango_layout (const Glib::ustring& text)
| Creates a new Pango::Layout with the appropriate font map, font description, and base direction for drawing text for this widget. More...
void | set_direction (TextDirection dir)
| Sets the reading direction on a particular widget. More...
TextDirection | get_direction () const
| Gets the reading direction for a particular widget. More...
void | set_cursor (const Glib::RefPtr< Gdk::Cursor >& cursor)
| Sets the cursor to be shown when pointer devices point towards widget. More...
void | set_cursor (const Glib::ustring& name={})
| Sets a named cursor to be shown when pointer devices point towards the widget. More...
Glib::RefPtr< Gdk::Cursor > | get_cursor ()
| Queries the cursor set via set_cursor(). More...
Glib::RefPtr< const Gdk::Cursor > | get_cursor () const
| Queries the cursor set via set_cursor(). More...
std::vector< Widget* > | list_mnemonic_labels ()
| Returns a newly allocated list of the widgets, normally labels, for which this widget is the target of a mnemonic (see for example, Gtk::Label::set_mnemonic_widget()). More...
std::vector< const Widget* > | list_mnemonic_labels () const
| Returns a newly allocated list of the widgets, normally labels, for which this widget is the target of a mnemonic (see for example, Gtk::Label::set_mnemonic_widget()). More...
void | add_mnemonic_label (Widget& label)
| Adds a widget to the list of mnemonic labels for this widget. More...
void | remove_mnemonic_label (Widget& label)
| Removes a widget from the list of mnemonic labels for this widget. More...
bool | drag_check_threshold (int start_x, int start_y, int current_x, int current_y)
| Checks to see if a mouse drag starting at ( start_x, start_y) and ending at ( current_x, current_y) has passed the GTK drag threshold, and thus should trigger the beginning of a drag-and-drop operation. More...
Glib::RefPtr< Gdk::FrameClock > | get_frame_clock ()
| Obtains the frame clock for a widget. More...
Glib::RefPtr< const Gdk::FrameClock > | get_frame_clock () const
| Obtains the frame clock for a widget. More...
void | set_parent (Widget& parent)
| This function is useful only when implementing subclasses of Gtk::Widget. More...
void | unparent ()
| This function is only for use in widget implementations. More...
void | map ()
| This function is only for use in widget implementations. More...
void | unmap ()
| This function is only for use in widget implementations. More...
void | trigger_tooltip_query ()
| Triggers a tooltip query on the display where the toplevel of widget is located. More...
void | set_tooltip_text (const Glib::ustring& text)
| Sets text as the contents of the tooltip. More...
Glib::ustring | get_tooltip_text () const
| Gets the contents of the tooltip for widget. More...
void | set_tooltip_markup (const Glib::ustring& markup)
| Sets markup as the contents of the tooltip, which is marked up with the Pango text markup language. More...
Glib::ustring | get_tooltip_markup () const
| Gets the contents of the tooltip for widget set using set_tooltip_markup(). More...
void | set_has_tooltip (bool has_tooltip=TRUE)
| Sets the has-tooltip property on widget to has_tooltip. More...
bool | get_has_tooltip () const
| Returns the current value of the has-tooltip property. More...
bool | in_destruction () const
| Returns whether the widget is currently being destroyed. More...
Glib::RefPtr< StyleContext > | get_style_context ()
| Returns the style context associated to widget. More...
Glib::RefPtr< const StyleContext > | get_style_context () const
| Returns the style context associated to widget. More...
guint | add_tick_callback (const SlotTick& slot)
| Queues an animation frame update and adds a callback to be called before each frame. More...
void | remove_tick_callback (guint id)
| Removes a tick callback previously registered with add_tick_callback(). More...
void | insert_action_group (const Glib::ustring& name, const Glib::RefPtr< Gio::ActionGroup >& group)
| Inserts group into widget. More...
void | remove_action_group (const Glib::ustring& name)
| Removes a group from the widget. More...
bool | activate_action (const Glib::ustring& name, const Glib::VariantBase& args={})
| Looks up the action in the action groups associated with the widget and its ancestors, and activates it. More...
void | activate_default ()
| Activate the default.activate action from widget. More...
void | set_font_map (const Glib::RefPtr< Pango::FontMap >& font_map)
| Sets the font map to use for Pango rendering. More...
Glib::RefPtr< Pango::FontMap > | get_font_map ()
| Gets the font map that has been set with set_font_map(). More...
Glib::RefPtr< const Pango::FontMap > | get_font_map () const
| Gets the font map that has been set with set_font_map(). More...
Widget* | get_first_child ()
| Returns the widgets first child. More...
const Widget* | get_first_child () const
| Returns the widgets first child. More...
Widget* | get_last_child ()
| Returns the widgets last child. More...
const Widget* | get_last_child () const
| Returns the widgets last child. More...
Widget* | get_next_sibling ()
| Returns the widgets next sibling. More...
const Widget* | get_next_sibling () const
| Returns the widgets next sibling. More...
Widget* | get_prev_sibling ()
| Returns the widgets previous sibling. More...
const Widget* | get_prev_sibling () const
| Returns the widgets previous sibling. More...
Glib::RefPtr< Gio::ListModel > | observe_children ()
| Returns a ListModel to track the children of widget. More...
Glib::RefPtr< const Gio::ListModel > | observe_children () const
| Returns a ListModel to track the children of widget. More...
Glib::RefPtr< Gio::ListModel > | observe_controllers ()
| Returns a ListModel to track the Gtk::EventControllers of widget. More...
Glib::RefPtr< const Gio::ListModel > | observe_controllers () const
| Returns a ListModel to track the Gtk::EventControllers of widget. More...
void | insert_after (Widget& parent, const Widget& previous_sibling)
| Inserts the Widget into the child widget list of parent after previous_sibling. More...
void | insert_before (Widget& parent, const Widget& next_sibling)
| Inserts the Widget into the child widget list of parent before next_sibling. More...
void | insert_at_start (Widget& parent)
| Inserts the Widget at the beginning of the child widget list of parent. More...
void | insert_at_end (Widget& parent)
| Inserts the Widget at the end of the child widget list of parent. More...
void | snapshot_child (Widget& child, const Glib::RefPtr< Gtk::Snapshot >& snapshot)
| When a widget receives a call to the snapshot function, it must send synthetic Gtk::WidgetClass.snapshot() calls to all children. More...
bool | should_layout () const
| Returns whether widget should contribute to the measuring and allocation of its parent. More...
Glib::ustring | get_css_name () const
| Returns the CSS name that is used for self. More...
void | add_css_class (const Glib::ustring& css_class)
| Adds css_class to widget. More...
void | remove_css_class (const Glib::ustring& css_class)
| Removes css_class from widget. More...
bool | has_css_class (const Glib::ustring& css_class) const
| Returns whether css_class is currently applied to widget. More...
std::vector< Glib::ustring > | get_css_classes () const
| Returns the list of css classes applied to widget. More...
void | set_css_classes (const std::vector< Glib::ustring >& classes)
| Will clear all css classes applied to widget and replace them with classes. More...
Glib::SignalProxy< void()> | signal_show ()
Glib::SignalProxy< void()> | signal_hide ()
Glib::SignalProxy< void()> | signal_map ()
| Emitted on mapping of a widget to the screen. More...
Glib::SignalProxy< void()> | signal_unmap ()
Glib::SignalProxy< void()> | signal_realize ()
| Emitted on realization of a widget. More...
Glib::SignalProxy< void()> | signal_unrealize ()
Glib::SignalProxy< void(Gtk::StateFlags)> | signal_state_flags_changed ()
Glib::SignalProxy< void(TextDirection)> | signal_direction_changed ()
Glib::SignalProxy< bool(bool)> | signal_mnemonic_activate ()
Glib::SignalProxy< bool(int, int, bool, const Glib::RefPtr< Tooltip >&)> | signal_query_tooltip ()
Glib::PropertyProxy< Glib::ustring > | property_name ()
| The name of the widget. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring > | property_name () const
| The name of the widget. More...
Glib::PropertyProxy_ReadOnly< Widget* > | property_parent () const
| The parent widget of this widget. More...
Glib::PropertyProxy_ReadOnly< Root* > | property_root () const
| The Gtk::Root widget of the widget tree containing this widget or `nullptr` if the widget is not contained in a root widget. More...
Glib::PropertyProxy< int > | property_width_request ()
| Override for width request of the widget, or -1 if natural request should be used. More...
Glib::PropertyProxy_ReadOnly< int > | property_width_request () const
| Override for width request of the widget, or -1 if natural request should be used. More...
Glib::PropertyProxy< int > | property_height_request ()
| Override for height request of the widget, or -1 if natural request should be used. More...
Glib::PropertyProxy_ReadOnly< int > | property_height_request () const
| Override for height request of the widget, or -1 if natural request should be used. More...
Glib::PropertyProxy< bool > | property_visible ()
| Whether the widget is visible. More...
Glib::PropertyProxy_ReadOnly< bool > | property_visible () const
| Whether the widget is visible. More...
Glib::PropertyProxy< bool > | property_sensitive ()
| Whether the widget responds to input. More...
Glib::PropertyProxy_ReadOnly< bool > | property_sensitive () const
| Whether the widget responds to input. More...
Glib::PropertyProxy< bool > | property_can_focus ()
| Whether the widget or any of its descendents can accept the input focus. More...
Glib::PropertyProxy_ReadOnly< bool > | property_can_focus () const
| Whether the widget or any of its descendents can accept the input focus. More...
Glib::PropertyProxy_ReadOnly< bool > | property_has_focus () const
| Whether the widget has the input focus. More...
Glib::PropertyProxy< bool > | property_can_target ()
| Whether the widget can receive pointer events. More...
Glib::PropertyProxy_ReadOnly< bool > | property_can_target () const
| Whether the widget can receive pointer events. More...
Glib::PropertyProxy< bool > | property_focus_on_click ()
| Whether the widget should grab focus when it is clicked with the mouse. More...
Glib::PropertyProxy_ReadOnly< bool > | property_focus_on_click () const
| Whether the widget should grab focus when it is clicked with the mouse. More...
Glib::PropertyProxy< bool > | property_focusable ()
| Whether this widget itself will accept the input focus. More...
Glib::PropertyProxy_ReadOnly< bool > | property_focusable () const
| Whether this widget itself will accept the input focus. More...
Glib::PropertyProxy_ReadOnly< bool > | property_has_default () const
| Whether the widget is the default widget. More...
Glib::PropertyProxy< bool > | property_receives_default ()
| If `true`, the widget will receive the default action when it is focused. More...
Glib::PropertyProxy_ReadOnly< bool > | property_receives_default () const
| If `true`, the widget will receive the default action when it is focused. More...
Glib::PropertyProxy< Glib::RefPtr< Gdk::Cursor > > | property_cursor ()
| The cursor used by widget. More...
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gdk::Cursor > > | property_cursor () const
| The cursor used by widget. More...
Glib::PropertyProxy< bool > | property_has_tooltip ()
| Enables or disables the emission of Gtk::Widget::signal_query_tooltip() on widget. More...
Glib::PropertyProxy_ReadOnly< bool > | property_has_tooltip () const
| Enables or disables the emission of Gtk::Widget::signal_query_tooltip() on widget. More...
Glib::PropertyProxy< Glib::ustring > | property_tooltip_markup ()
| Sets the text of tooltip to be the given string, which is marked up with the [Pango text markup language][PangoMarkupFormat]. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring > | property_tooltip_markup () const
| Sets the text of tooltip to be the given string, which is marked up with the [Pango text markup language][PangoMarkupFormat]. More...
Glib::PropertyProxy< Glib::ustring > | property_tooltip_text ()
| Sets the text of tooltip to be the given string. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring > | property_tooltip_text () const
| Sets the text of tooltip to be the given string. More...
Glib::PropertyProxy< Align > | property_halign ()
| How to distribute horizontal space if widget gets extra space, see Gtk::Align. More...
Glib::PropertyProxy_ReadOnly< Align > | property_halign () const
| How to distribute horizontal space if widget gets extra space, see Gtk::Align. More...
Glib::PropertyProxy< Align > | property_valign ()
| How to distribute vertical space if widget gets extra space, see Gtk::Align. More...
Glib::PropertyProxy_ReadOnly< Align > | property_valign () const
| How to distribute vertical space if widget gets extra space, see Gtk::Align. More...
Glib::PropertyProxy< int > | property_margin_start ()
| Margin on start of widget, horizontally. More...
Glib::PropertyProxy_ReadOnly< int > | property_margin_start () const
| Margin on start of widget, horizontally. More...
Glib::PropertyProxy< int > | property_margin_end ()
| Margin on end of widget, horizontally. More...
Glib::PropertyProxy_ReadOnly< int > | property_margin_end () const
| Margin on end of widget, horizontally. More...
Glib::PropertyProxy< int > | property_margin_top ()
| Margin on top side of widget. More...
Glib::PropertyProxy_ReadOnly< int > | property_margin_top () const
| Margin on top side of widget. More...
Glib::PropertyProxy< int > | property_margin_bottom ()
| Margin on bottom side of widget. More...
Glib::PropertyProxy_ReadOnly< int > | property_margin_bottom () const
| Margin on bottom side of widget. More...
Glib::PropertyProxy< bool > | property_hexpand ()
| Whether to expand horizontally. More...
Glib::PropertyProxy_ReadOnly< bool > | property_hexpand () const
| Whether to expand horizontally. More...
Glib::PropertyProxy< bool > | property_hexpand_set ()
| Whether to use the Gtk::Widget::property_hexpand() property. More...
Glib::PropertyProxy_ReadOnly< bool > | property_hexpand_set () const
| Whether to use the Gtk::Widget::property_hexpand() property. More...
Glib::PropertyProxy< bool > | property_vexpand ()
| Whether to expand vertically. More...
Glib::PropertyProxy_ReadOnly< bool > | property_vexpand () const
| Whether to expand vertically. More...
Glib::PropertyProxy< bool > | property_vexpand_set ()
| Whether to use the Gtk::Widget::property_vexpand() property. More...
Glib::PropertyProxy_ReadOnly< bool > | property_vexpand_set () const
| Whether to use the Gtk::Widget::property_vexpand() property. More...
Glib::PropertyProxy< double > | property_opacity ()
| The requested opacity of the widget. More...
Glib::PropertyProxy_ReadOnly< double > | property_opacity () const
| The requested opacity of the widget. More...
Glib::PropertyProxy< Overflow > | property_overflow ()
| How content outside the widget's content area is treated. More...
Glib::PropertyProxy_ReadOnly< Overflow > | property_overflow () const
| How content outside the widget's content area is treated. More...
Glib::PropertyProxy_ReadOnly< int > | property_scale_factor () const
| The scale factor of the widget. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring > | property_css_name () const
| The name of this widget in the CSS tree. More...
Glib::PropertyProxy< std::vector< Glib::ustring > > | property_css_classes ()
| A list of css classes applied to this widget. More...
Glib::PropertyProxy_ReadOnly< std::vector< Glib::ustring > > | property_css_classes () const
| A list of css classes applied to this widget. More...
Glib::PropertyProxy< Glib::RefPtr< LayoutManager > > | property_layout_manager ()
| The Gtk::LayoutManager instance to use to compute the preferred size of the widget, and allocate its children. More...
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< LayoutManager > > | property_layout_manager () const
| The Gtk::LayoutManager instance to use to compute the preferred size of the widget, and allocate its children. More...
Public Member Functions inherited from Gtk::Object
| Object (Object&& src) noexcept
Object& | operator= (Object&& src) noexcept
| ~Object () noexcept override
Public Member Functions inherited from Glib::Object
| Object (const Object &)=delete
Object & | operator= (const Object &)=delete
| Object (Object &&src) noexcept
Object & | operator= (Object &&src) noexcept
void * | get_data (const QueryQuark &key)
void | set_data (const Quark &key, void *data)
void | set_data (const Quark &key, void *data, DestroyNotify notify)
void | remove_data (const QueryQuark &quark)
void * | steal_data (const QueryQuark &quark)
Glib::RefPtr< Glib::Object > | wrap (GObject *object, bool take_copy=false)
Public Member Functions inherited from Glib::ObjectBase
| ObjectBase (const ObjectBase &)=delete
ObjectBase & | operator= (const ObjectBase &)=delete
void | set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value)
void | get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const
void | set_property (const Glib::ustring &property_name, const PropertyType &value)
void | get_property (const Glib::ustring &property_name, PropertyType &value) const
PropertyType | get_property (const Glib::ustring &property_name) const
sigc::connection | connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void()> &slot)
sigc::connection | connect_property_changed (const Glib::ustring &property_name, sigc::slot< void()> &&slot)
void | freeze_notify ()
void | thaw_notify ()
virtual void | reference () const
virtual void | unreference () const
GObject * | gobj ()
const GObject * | gobj () const
GObject * | gobj_copy () const
Public Member Functions inherited from sigc::trackable
| trackable () noexcept
| trackable (const trackable &src) noexcept
| trackable (trackable &&src) noexcept
| ~trackable ()
void | add_destroy_notify_callback (notifiable *data, func_destroy_notify func) const
void | notify_callbacks ()
trackable & | operator= (const trackable &src)
trackable & | operator= (trackable &&src) noexcept
void | remove_destroy_notify_callback (notifiable *data) const
Public Member Functions inherited from Gtk::Accessible
| Accessible (Accessible&& src) noexcept
Accessible& | operator= (Accessible&& src) noexcept
| ~Accessible () noexcept override
GtkAccessible* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkAccessible* | gobj () const
| Provides access to the underlying C GObject. More...
Role | get_accessible_role () const
| Retrieves the Gtk::Accessible::Role for the given Gtk::Accessible. More...
void | update_state (State state, const Glib::ValueBase& value)
| Updates an accessible state. More...
void | update_property (Property property, const Glib::ValueBase& value)
| Updates an accessible property. More...
void | update_relation (Relation relation, const Glib::ValueBase& value)
| Updates an accessible relation. More...
void | reset_state (State state)
| Resets the accessible state to its default value. More...
void | reset_property (Property property)
| Resets the accessible property to its default value. More...
void | reset_relation (Relation relation)
| Resets the accessible relation to its default value. More...
Glib::PropertyProxy< Role > | property_accessible_role ()
| The accessible role of the given Gtk::Accessible implementation. More...
Glib::PropertyProxy_ReadOnly< Role > | property_accessible_role () const
| The accessible role of the given Gtk::Accessible implementation. More...
Public Member Functions inherited from Glib::Interface
| Interface ()
| Interface (Interface &&src) noexcept
Interface & | operator= (Interface &&src) noexcept
| Interface (const Glib::Interface_Class &interface_class)
| Interface (GObject *castitem)
| ~Interface () noexcept override
| Interface (const Interface &)=delete
Interface & | operator= (const Interface &)=delete
GObject * | gobj ()
const GObject * | gobj () const
Public Member Functions inherited from Gtk::Buildable
| Buildable (Buildable&& src) noexcept
Buildable& | operator= (Buildable&& src) noexcept
| ~Buildable () noexcept override
GtkBuildable* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkBuildable* | gobj () const
| Provides access to the underlying C GObject. More...
Glib::ustring | get_buildable_id () const
| Gets the ID of the buildable object. More...
Public Member Functions inherited from Gtk::ConstraintTarget
| ConstraintTarget (ConstraintTarget&& src) noexcept
ConstraintTarget& | operator= (ConstraintTarget&& src) noexcept
| ~ConstraintTarget () noexcept override
GtkConstraintTarget* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkConstraintTarget* | gobj () const
| Provides access to the underlying C GObject. More...
Public Member Functions inherited from Gtk::Orientable
| Orientable (Orientable&& src) noexcept
Orientable& | operator= (Orientable&& src) noexcept
| ~Orientable () noexcept override
GtkOrientable* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkOrientable* | gobj () const
| Provides access to the underlying C GObject. More...
void | set_orientation (Orientation orientation)
| Sets the orientation of the orientable. More...
Orientation | get_orientation () const
| Retrieves the orientation of the orientable. More...
Glib::PropertyProxy< Orientation > | property_orientation ()
| The orientation of the orientable. More...
Glib::PropertyProxy_ReadOnly< Orientation > | property_orientation () const
| The orientation of the orientable. More...

## Static Public Member Functions
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::Widget
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
static void | set_default_direction (TextDirection dir)
| Sets the default reading direction for widgets where the direction has not been explicitly set by set_direction(). More...
static TextDirection | get_default_direction ()
| Obtains the current default reading direction. More...
Static Public Member Functions inherited from Gtk::Accessible
static void | add_interface (GType gtype_implementer)
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::Buildable
static void | add_interface (GType gtype_implementer)
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::ConstraintTarget
static void | add_interface (GType gtype_implementer)
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::Orientable
static void | add_interface (GType gtype_implementer)
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...

## Related Functions
(Note that these are not member functions.)
Gtk::Box* | wrap (GtkBox* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::Widget
Gtk::Widget* | wrap (GtkWidget* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::Accessible
Glib::RefPtr< Gtk::Accessible > | wrap (GtkAccessible* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::Buildable
Glib::RefPtr< Gtk::Buildable > | wrap (GtkBuildable* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::ConstraintTarget
Glib::RefPtr< Gtk::ConstraintTarget > | wrap (GtkConstraintTarget* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::Orientable
Glib::RefPtr< Gtk::Orientable > | wrap (GtkOrientable* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Additional Inherited Members
Public Types inherited from Gtk::Widget
using | SlotTick = sigc::slot< bool(const Glib::RefPtr< Gdk::FrameClock >&)>
| Callback type for adding a function to update animations. More...
Public Types inherited from Glib::Object
typedef void(*)(gpointer data | DestroyNotify)
Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify | func_destroy_notify
Public Types inherited from sigc::notifiable
typedef internal::func_destroy_notify | func_destroy_notify
Public Types inherited from Gtk::Accessible
enum | Role { Role::ALERT, Role::ALERT_DIALOG, Role::BANNER, Role::BUTTON, Role::CAPTION, Role::CELL, Role::CHECKBOX, Role::COLUMN_HEADER, Role::COMBO_BOX, Role::COMMAND, Role::COMPOSITE, Role::DIALOG, Role::DOCUMENT, Role::FEED, Role::FORM, Role::GENERIC, Role::GRID, Role::GRID_CELL, Role::GROUP, Role::HEADING, Role::IMG, Role::INPUT, Role::LABEL, Role::LANDMARK, Role::LEGEND, Role::LINK, Role::LIST, Role::LIST_BOX, Role::LIST_ITEM, Role::LOG, Role::MAIN, Role::MARQUEE, Role::MATH, Role::METER, Role::MENU, Role::MENU_BAR, Role::MENU_ITEM, Role::MENU_ITEM_CHECKBOX, Role::MENU_ITEM_RADIO, Role::NAVIGATION, Role::NONE, Role::NOTE, Role::OPTION, Role::PRESENTATION, Role::PROGRESS_BAR, Role::RADIO, Role::RADIO_GROUP, Role::RANGE, Role::REGION, Role::ROW, Role::ROW_GROUP, Role::ROW_HEADER, Role::SCROLLBAR, Role::SEARCH, Role::SEARCH_BOX, Role::SECTION, Role::SECTION_HEAD, Role::SELECT, Role::SEPARATOR, Role::SLIDER, Role::SPIN_BUTTON, Role::STATUS, Role::STRUCTURE, Role::SWITCH, Role::TAB, Role::TABLE, Role::TAB_LIST, Role::TAB_PANEL, Role::TEXT_BOX, Role::TIME, Role::TIMER, Role::TOOLBAR, Role::TOOLTIP, Role::TREE, Role::TREE_GRID, Role::TREE_ITEM, Role::WIDGET, Role::WINDOW }
| The accessible role for a Gtk::Accessible implementation. More...
enum | State { State::BUSY, State::CHECKED, State::DISABLED, State::EXPANDED, State::HIDDEN, State::INVALID, State::PRESSED, State::SELECTED }
| The possible accessible states of a Gtk::Accessible. More...
enum | Property { Property::AUTOCOMPLETE, Property::DESCRIPTION, Property::HAS_POPUP, Property::KEY_SHORTCUTS, Property::LABEL, Property::LEVEL, Property::MODAL, Property::MULTI_LINE, Property::MULTI_SELECTABLE, Property::ORIENTATION, Property::PLACEHOLDER, Property::READ_ONLY, Property::REQUIRED, Property::ROLE_DESCRIPTION, Property::SORT, Property::VALUE_MAX, Property::VALUE_MIN, Property::VALUE_NOW, Property::VALUE_TEXT }
| The possible accessible properties of a Gtk::Accessible. More...
enum | Relation { Relation::ACTIVE_DESCENDANT, Relation::COL_COUNT, Relation::COL_INDEX, Relation::COL_INDEX_TEXT, Relation::COL_SPAN, Relation::CONTROLS, Relation::DESCRIBED_BY, Relation::DETAILS, Relation::ERROR_MESSAGE, Relation::FLOW_TO, Relation::LABELLED_BY, Relation::OWNS, Relation::POS_IN_SET, Relation::ROW_COUNT, Relation::ROW_INDEX, Relation::ROW_INDEX_TEXT, Relation::ROW_SPAN, Relation::SET_SIZE }
| The possible accessible relations of a Gtk::Accessible. More...
Protected Member Functions inherited from Gtk::Widget
virtual void | root_vfunc ()
virtual void | unroot_vfunc ()
virtual void | size_allocate_vfunc (int width, int height, int baseline)
virtual SizeRequestMode | get_request_mode_vfunc () const
virtual void | measure_vfunc (Orientation orientation, int for_size, int& minimum, int& natural, int& minimum_baseline, int& natural_baseline) const
virtual bool | grab_focus_vfunc ()
virtual void | set_focus_child_vfunc (Widget* child)
| Sets the focused child of widget. More...
virtual void | compute_expand_vfunc (bool& hexpand_p, bool& vexpand_p)
virtual bool | contains_vfunc (double x, double y) const
virtual void | snapshot_vfunc (const Glib::RefPtr< Gtk::Snapshot >& snapshot)
| Widget ()
void | realize ()
| Creates the GDK (windowing system) resources associated with a widget. More...
void | unrealize ()
| This function is only useful in widget implementations. More...
void | realize_if_needed ()
void | set_focus_child (Widget& child)
| Set child as the current focus child of widget. More...
void | unset_focus_child ()
| Unsets the focus child of the widget. More...
Widget* | get_focus_child ()
| Returns the current focus child of widget. More...
const Widget* | get_focus_child () const
| Returns the current focus child of widget. More...
virtual void | on_show ()
| This is a default handler for the signal signal_show(). More...
virtual void | on_hide ()
| This is a default handler for the signal signal_hide(). More...
virtual void | on_map ()
| This is a default handler for the signal signal_map(). More...
virtual void | on_unmap ()
| This is a default handler for the signal signal_unmap(). More...
virtual void | on_realize ()
| This is a default handler for the signal signal_realize(). More...
virtual void | on_unrealize ()
| This is a default handler for the signal signal_unrealize(). More...
virtual void | on_state_flags_changed (Gtk::StateFlags previous_state_flags)
| This is a default handler for the signal signal_state_flags_changed(). More...
virtual void | on_direction_changed (TextDirection direction)
| This is a default handler for the signal signal_direction_changed(). More...
virtual bool | on_mnemonic_activate (bool group_cycling)
| This is a default handler for the signal signal_mnemonic_activate(). More...
virtual bool | on_query_tooltip (int x, int y, bool keyboard_tooltip, const Glib::RefPtr< Tooltip >& tooltip)
| This is a default handler for the signal signal_query_tooltip(). More...
Protected Member Functions inherited from Glib::Object
| Object ()
| Object (const Glib::ConstructParams &construct_params)
| Object (GObject *castitem)
| ~Object () noexcept override
Protected Member Functions inherited from Glib::ObjectBase
| ObjectBase ()
| ObjectBase (const char *custom_type_name)
| ObjectBase (const std::type_info &custom_type_info)
| ObjectBase (ObjectBase &&src) noexcept
ObjectBase & | operator= (ObjectBase &&src) noexcept
virtual | ~ObjectBase () noexcept=0
void | initialize (GObject *castitem)
void | initialize_move (GObject *castitem, Glib::ObjectBase *previous_wrapper)
Protected Member Functions inherited from Gtk::Accessible
| Accessible ()
| You should derive from this class to use it. More...
Protected Member Functions inherited from Gtk::Buildable
| Buildable ()
| You should derive from this class to use it. More...
Protected Member Functions inherited from Gtk::ConstraintTarget
| ConstraintTarget ()
| You should derive from this class to use it. More...
Protected Member Functions inherited from Gtk::Orientable
| Orientable ()
| You should derive from this class to use it. More...

## Detailed Description

A container for packing widgets in a single row or column.

The Gtk::Box widget arranges child widgets into a single row or column, depending upon the value of its Gtk::Orientable::property_orientation() property. Within the other dimension, all children are allocated the same size. Of course, Gtk::Widget::set_halign() and Gtk::Widget::set_valign() can be used on the children to influence their allocation.

Use repeated calls to append() to pack widgets into a Gtk::Box from start to end. Use remove() to remove widgets from the Gtk::Box. insert_child_after() can be used to add a child at a particular position.

Use set_homogeneous() to specify whether or not all children of the Gtk::Box are forced to get the same amount of space.

Use set_spacing() to determine how much space will be minimally placed between all children in the Gtk::Box. Note that spacing is added between the children.

Use reorder_child_after() and reorder_child_at_start() to move a child to a different place in the box.

## Constructor & Destructor Documentation

Gtk::Box::Box | ( | Box&& | src | ) |
| noexcept

Gtk::Box::Box | ( | const Box& |  | ) |
| delete

Gtk::Box::~Box | ( |  | ) |
| overridenoexcept

Gtk::Box::Box | ( | Orientation | orientation = `Orientation::HORIZONTAL`,
|  | int | spacing = `0`
| ) |  |
| explicit

Creates a new box.

Parameters

  orientation | The box's orientation.
  spacing | Determines the space in pixels between child widgets.

## Member Function Documentation

void Gtk::Box::append | ( | Gtk::Widget& | child | ) |

Adds child as the last child to box.

Parameters

  child | The Gtk::Widget to append.

BaselinePosition Gtk::Box::get_baseline_position | ( |  | ) | const

Gets the value set by set_baseline_position().

Returns
  The baseline position.

bool Gtk::Box::get_homogeneous | ( |  | ) | const

Returns whether the box is homogeneous (all children are the same size).

See set_homogeneous().

Returns
  `true` if the box is homogeneous.

int Gtk::Box::get_spacing | ( |  | ) | const

Gets the value set by set_spacing().

Returns
  Spacing between children.

static GType Gtk::Box::get_type | ( |  | ) |
| static

Get the GType for this class, for use with the underlying GObject type system.

GtkBox* Gtk::Box::gobj | ( |  | ) |
| inline

Provides access to the underlying C GObject.

const GtkBox* Gtk::Box::gobj | ( |  | ) | const
| inline

Provides access to the underlying C GObject.

void Gtk::Box::insert_child_after | ( | Widget& | child,
|  | const Widget& | sibling
| ) |  |

Inserts child in the position after sibling in the list of children.

Parameters

  child | The Gtk::Widget to insert.
  sibling | The sibling to move child after.

void Gtk::Box::insert_child_at_start | ( | Widget& | child | ) |

Inserts child in the first position in the list of children.

Parameters

  child | The Gtk::Widget to insert.

Box& Gtk::Box::operator= | ( | Box&& | src | ) |
| noexcept

Box& Gtk::Box::operator= | ( | const Box& |  | ) |
| delete

void Gtk::Box::prepend | ( | Gtk::Widget& | child | ) |

Adds child as the first child to box.

Parameters

  child | The Gtk::Widget to prepend.

Glib::PropertyProxy< BaselinePosition > Gtk::Box::property_baseline_position | ( |  | ) |

The position of the baseline aligned widgets if extra space is available.

Default value: Gtk::BaselinePosition::CENTER

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< BaselinePosition > Gtk::Box::property_baseline_position | ( |  | ) | const

The position of the baseline aligned widgets if extra space is available.

Default value: Gtk::BaselinePosition::CENTER

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy< bool > Gtk::Box::property_homogeneous | ( |  | ) |

Whether the children should all be the same size.

Default value: `false`

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< bool > Gtk::Box::property_homogeneous | ( |  | ) | const

Whether the children should all be the same size.

Default value: `false`

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy< int > Gtk::Box::property_spacing | ( |  | ) |

The amount of space between children.

Default value: 0

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< int > Gtk::Box::property_spacing | ( |  | ) | const

The amount of space between children.

Default value: 0

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

void Gtk::Box::remove | ( | Gtk::Widget& | child | ) |

Removes a child widget from box, after it has been added with append(), prepend(), or insert_child_after().

Parameters

  child | The child to remove.

void Gtk::Box::reorder_child_after | ( | Widget& | child,
|  | const Widget& | sibling
| ) |  |

Moves child to the position after sibling in the list of children.

Parameters

  child | The Gtk::Widget to move. Must be a child of the Box.
  sibling | The sibling to move child after.

void Gtk::Box::reorder_child_at_start | ( | Widget& | child | ) |

Moves child to the first position in the list of children.

Parameters

  child | The Gtk::Widget to move. Must be a child of the Box.

void Gtk::Box::set_baseline_position | ( | BaselinePosition | position | ) |

Sets the baseline position of a box.

This affects only horizontal boxes with at least one baseline aligned child. If there is more vertical space available than requested, and the baseline is not allocated by the parent then position is used to allocate the baseline wrt the extra space available.

Parameters

  position | A Gtk::BaselinePosition.

void Gtk::Box::set_homogeneous | ( | bool | homogeneous = `true` | ) |

Sets the Gtk::Box::property_homogeneous() property of box, controlling whether or not all children of box are given equal space in the box.

Parameters

  homogeneous | A boolean value, `true` to create equal allotments, `false` for variable allotments.

void Gtk::Box::set_spacing | ( | int | spacing | ) |

Sets the Gtk::Box::property_spacing() property of box, which is the number of pixels to place between children of box.

Parameters

  spacing | The number of pixels to put between children.

## Friends And Related Function Documentation

Gtk::Box* wrap | ( | GtkBox * | object,
|  | bool | take_copy = `false`
| ) |  |
| related

A Glib::wrap() method for this object.

Parameters

  object | The C instance.
  take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns
  A C++ instance that wraps this C instance.