gtkmm: Gtk::SizeGroup Class Reference

Gtk::SizeGroup provides a mechanism for grouping a number of widgets together so they all request the same amount of space. More...

#include <gtkmm/sizegroup.h>

Inheritance diagram for Gtk::SizeGroup:

[legend]

Public Types
enum class	Mode { NONE , HORIZONTAL , VERTICAL , BOTH }

Public Member Functions
	SizeGroup (SizeGroup &&src) noexcept

SizeGroup &	operator= (SizeGroup &&src) noexcept

	~SizeGroup () noexcept override

GtkSizeGroup *	gobj ()
	Provides access to the underlying C GObject.

const GtkSizeGroup *	gobj () const
	Provides access to the underlying C GObject.

GtkSizeGroup *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

void	set_mode (Mode mode)
	Sets the `Gtk::SizeGroup::Mode` of the size group.

Mode	get_mode () const
	Gets the current mode of the size group.

void	add_widget (Widget &widget)
	Adds a widget to a `Gtk::SizeGroup`.

void	remove_widget (Widget &widget)
	Removes a widget from a `Gtk::SizeGroup`.

std::vector< Widget * >	get_widgets ()
	Returns the list of widgets associated with size_group.

std::vector< const Widget * >	get_widgets () const
	Returns the list of widgets associated with size_group.

Glib::PropertyProxy< Mode >	property_mode ()
	The direction in which the size group affects requested sizes.

Glib::PropertyProxy_ReadOnly< Mode >	property_mode () const
	The direction in which the size group affects requested sizes.

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.

const GtkBuildable *	gobj () const
	Provides access to the underlying C GObject.

Glib::ustring	get_buildable_id () const
	Gets the ID of the buildable object.

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system.

static Glib::RefPtr< SizeGroup >	create (Mode mode)

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.

Protected Member Functions
	SizeGroup (Mode mode)

Protected Member Functions inherited from Gtk::Buildable
	Buildable ()
	You should derive from this class to use it.

Related Symbols
(Note that these are not member symbols.)
Glib::RefPtr< Gtk::SizeGroup >	wrap (GtkSizeGroup *object, bool take_copy=false)
	A Glib::wrap() method for this object.

Related Symbols inherited from Gtk::Buildable
Glib::RefPtr< Gtk::Buildable >	wrap (GtkBuildable *object, bool take_copy=false)
	A Glib::wrap() method for this object.

Detailed Description

Gtk::SizeGroup provides a mechanism for grouping a number of widgets together so they all request the same amount of space.

This is typically useful when you want a column of widgets to have the same size, but you can't use a Gtk::Grid widget.

In detail, the size requested for each widget in a Gtk::SizeGroup is the maximum of the sizes that would have been requested for each widget in the size group if they were not in the size group. The mode of the size group (see set_mode()) determines whether this applies to the horizontal size, the vertical size, or both sizes.

Note that size groups only affect the amount of space requested, not the size that the widgets finally receive. If you want the widgets in a GtkSizeGroup to actually be the same size, you need to pack them in such a way that they get the size they request and not more. For example, if you are packing your widgets into a table, you would not include the Gtk::FILL flag.

Widgets can be part of multiple size groups; GTK+ will compute the horizontal size of a widget from the horizontal requisition of all widgets that can be reached from the widget by a chain of size groups of type Gtk::SizeGroup::Mode::HORIZONTAL or Gtk::SizeGroup::Mode::BOTH, and the vertical size from the vertical requisition of all widgets that can be reached from the widget by a chain of size groups of type Gtk::SizeGroup::Mode::VERTICAL or Gtk::SizeGroup::Mode::BOTH.

Member Enumeration Documentation

◆ Mode

enum class Gtk::SizeGroup::Mode

strong

Enumerator
NONE	Group has no effect.
HORIZONTAL	Group affects horizontal requisition.
VERTICAL	Group affects vertical requisition.
BOTH	Group affects both horizontal and vertical requisition.

Constructor & Destructor Documentation

◆ SizeGroup() [1/2]

Gtk::SizeGroup::SizeGroup ( SizeGroup && src )

noexcept

◆ ~SizeGroup()

Gtk::SizeGroup::~SizeGroup ( )

overridenoexcept

◆ SizeGroup() [2/2]

Gtk::SizeGroup::SizeGroup ( Mode mode )

explicitprotected

Member Function Documentation

◆ add_widget()

void Gtk::SizeGroup::add_widget ( Widget & widget )

Adds a widget to a Gtk::SizeGroup.

In the future, the requisition of the widget will be determined as the maximum of its requisition and the requisition of the other widgets in the size group. Whether this applies horizontally, vertically, or in both directions depends on the mode of the size group. See set_mode().

When the widget is destroyed or no longer referenced elsewhere, it will be removed from the size group.

Parameters

widget The Gtk::Widget to add.

◆ create()

static Glib::RefPtr< SizeGroup > Gtk::SizeGroup::create ( Mode mode )

static

◆ get_mode()

Mode Gtk::SizeGroup::get_mode ( ) const

Gets the current mode of the size group.

Returns: The current mode of the size group.

◆ get_type()

static GType Gtk::SizeGroup::get_type ( )

static

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

◆ get_widgets() [1/2]

std::vector< Widget * > Gtk::SizeGroup::get_widgets ( )

Returns the list of widgets associated with size_group.

Returns: A SList of widgets. The list is owned by GTK and should not be modified.

◆ get_widgets() [2/2]

std::vector< const Widget * > Gtk::SizeGroup::get_widgets ( ) const

Returns the list of widgets associated with size_group.

Returns: A SList of widgets. The list is owned by GTK and should not be modified.

◆ gobj() [1/2]

GtkSizeGroup * Gtk::SizeGroup::gobj ( )

inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const GtkSizeGroup * Gtk::SizeGroup::gobj ( ) const

inline

Provides access to the underlying C GObject.

◆ gobj_copy()

GtkSizeGroup * Gtk::SizeGroup::gobj_copy ( )

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

◆ operator=()

SizeGroup & Gtk::SizeGroup::operator= ( SizeGroup && src )

noexcept

◆ property_mode() [1/2]

Glib::PropertyProxy< Mode > Gtk::SizeGroup::property_mode ( )

The direction in which the size group affects requested sizes.

Default value: Gtk::SizeGroup::Mode::HORIZONTAL

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.

◆ property_mode() [2/2]

Glib::PropertyProxy_ReadOnly< Mode > Gtk::SizeGroup::property_mode ( ) const

The direction in which the size group affects requested sizes.

Default value: Gtk::SizeGroup::Mode::HORIZONTAL

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

◆ remove_widget()

void Gtk::SizeGroup::remove_widget ( Widget & widget )

Removes a widget from a Gtk::SizeGroup.

Parameters

widget The Gtk::Widget to remove.

◆ set_mode()

void Gtk::SizeGroup::set_mode ( Mode mode )

Sets the Gtk::SizeGroup::Mode of the size group.

The mode of the size group determines whether the widgets in the size group should all have the same horizontal requisition (Gtk::SizeGroup::Mode::HORIZONTAL) all have the same vertical requisition (Gtk::SizeGroup::Mode::VERTICAL), or should all have the same requisition in both directions (Gtk::SizeGroup::Mode::BOTH).

Parameters

mode	The mode to set for the size group.

Friends And Related Symbol Documentation

◆ wrap()

Glib::RefPtr< Gtk::SizeGroup > wrap	(	GtkSizeGroup *	object,
		bool	take_copy = `false`
	)

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.

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Symbols

Detailed Description

Member Enumeration Documentation

◆ Mode

Constructor & Destructor Documentation

◆ SizeGroup() [1/2]

◆ ~SizeGroup()

◆ SizeGroup() [2/2]

Member Function Documentation

◆ add_widget()

◆ create()

◆ get_mode()

◆ get_type()

◆ get_widgets() [1/2]

◆ get_widgets() [2/2]

◆ gobj() [1/2]

◆ gobj() [2/2]

◆ gobj_copy()

◆ operator=()

◆ property_mode() [1/2]

◆ property_mode() [2/2]

◆ remove_widget()

◆ set_mode()

Friends And Related Symbol Documentation

◆ wrap()