gtkmm: Gtk::WidgetPaintable Class Reference

Drawing a widget elsewhere. More...

#include <gtkmm/widgetpaintable.h>

Inheritance diagram for Gtk::WidgetPaintable:

[legend]

Public Member Functions
	WidgetPaintable (WidgetPaintable&& src) noexcept

WidgetPaintable&	operator= (WidgetPaintable&& src) noexcept

	~WidgetPaintable () noexcept override

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

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

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

Widget*	get_widget ()
	Returns the widget that is observed or `nullptr` if none. More...

const Widget*	get_widget () const
	Returns the widget that is observed or `nullptr` if none. More...

void	set_widget (Widget& widget)
	Sets the widget that should be observed. More...

void	unset_widget ()

Glib::PropertyProxy< Widget* >	property_widget ()
	The observed widget or `nullptr` if none. More...

Glib::PropertyProxy_ReadOnly< Widget* >	property_widget () const
	The observed widget or `nullptr` if none. More...

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 Gdk::Paintable
	Paintable (Paintable&& src) noexcept

Paintable&	operator= (Paintable&& src) noexcept

	~Paintable () noexcept override

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

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

void	snapshot (const Glib::RefPtr< Gdk::Snapshot >& snapshot, double width, double height)
	Snapshots the given paintable with the given width and height at the current (0,0) offset of the snapshot. More...

Glib::RefPtr< const Paintable >	get_current_image () const
	Gets an immutable paintable for the current contents displayed by paintable. More...

Flags	get_flags () const
	Get flags for the paintable. More...

int	get_intrinsic_width () const
	Gets the preferred width the paintable would like to be displayed at. More...

int	get_intrinsic_height () const
	Gets the preferred height the paintable would like to be displayed at. More...

double	get_intrinsic_aspect_ratio () const
	Gets the preferred aspect ratio the paintable would like to be displayed at. More...

void	compute_concrete_size (double specified_width, double specified_height, double default_width, double default_height, double& concrete_width, double& concrete_height) const
	Applies the sizing algorithm outlined in https://drafts.csswg.org/css-images-3/#default-sizing to the given paintable. More...

void	invalidate_contents ()
	Called by implementations of Gdk::Paintable to invalidate their contents. More...

void	invalidate_size ()
	Called by implementations of Gdk::Paintable to invalidate their size. More...

Glib::SignalProxy< void()>	signal_invalidate_contents ()

Glib::SignalProxy< void()>	signal_invalidate_size ()

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

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

static Glib::RefPtr< WidgetPaintable >	create ()

static Glib::RefPtr< WidgetPaintable >	create (Widget& widget)

Static Public Member Functions inherited from Gdk::Paintable
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...

Protected Member Functions
	WidgetPaintable ()

	WidgetPaintable (Widget& widget)

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 Gdk::Paintable
	Paintable ()
	You should derive from this class to use it. More...

virtual void	snapshot_vfunc (const Glib::RefPtr< Gdk::Snapshot >&snapshot, double width, double height)

virtual Glib::RefPtr< Paintable >	get_current_image_vfunc () const

virtual Flags	get_flags_vfunc () const

virtual int	get_intrinsic_width_vfunc () const

virtual int	get_intrinsic_height_vfunc () const

virtual double	get_intrinsic_aspect_ratio_vfunc () const

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gtk::WidgetPaintable >	wrap (GtkWidgetPaintable* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Related Functions inherited from Gdk::Paintable
Glib::RefPtr< Gdk::Paintable >	wrap (GdkPaintable* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Additional Inherited Members
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 Gdk::Paintable
enum	Flags { Flags::STATIC_SIZE = 1 << 0, Flags::STATIC_CONTENTS = 1 << 1 }
	Flags about this object. More...

Detailed Description

Drawing a widget elsewhere.

Gtk::WidgetPaintable is an implementation of the Gdk::Paintable interface that allows displaying the contents of a Gtk::Widget.

WidgetPaintable will also take care of the widget not being in a state where it can be drawn (like when it isn't shown) and just draw nothing or where it does not have a size (like when it is hidden) and report no size in that case.

Of course, WidgetPaintable allows you to monitor widgets for size changes by emitting Gdk::Paintable::signal_invalidate_size() whenever the size of the widget changes as well as for visual changes by emitting Gdk::Paintable::signal_invalidate_contents() whenever the widget changes.

You can of course use a Gtk::WidgetPaintable everywhere a Gdk::Paintable is allowed, including using it on a Gtk::Picture (or one of its parents) that it was set on itself via Gtk::Picture::set_paintable(). The paintable will take care of recursion when this happens. If you do this however, ensure Gtk::Picture::property_can_shrink() is set to true or you might end up with an infinitely growing widget.

Since gtkmm 3.94:

Constructor & Destructor Documentation

Gtk::WidgetPaintable::WidgetPaintable ( WidgetPaintable&& src )

noexcept

Gtk::WidgetPaintable::~WidgetPaintable ( )

overridenoexcept

Gtk::WidgetPaintable::WidgetPaintable ( )

protected

Gtk::WidgetPaintable::WidgetPaintable ( Widget& widget )

explicitprotected

Member Function Documentation

static Glib::RefPtr<WidgetPaintable> Gtk::WidgetPaintable::create ( )

static

static Glib::RefPtr<WidgetPaintable> Gtk::WidgetPaintable::create ( Widget& widget )

static

static GType Gtk::WidgetPaintable::get_type ( )

static

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

Widget* Gtk::WidgetPaintable::get_widget ( )

Returns the widget that is observed or nullptr if none.

Returns: The observed widget.

const Widget* Gtk::WidgetPaintable::get_widget ( ) const

Returns the widget that is observed or nullptr if none.

Returns: The observed widget.

GtkWidgetPaintable* Gtk::WidgetPaintable::gobj ( )

inline

Provides access to the underlying C GObject.

const GtkWidgetPaintable* Gtk::WidgetPaintable::gobj ( ) const

inline

Provides access to the underlying C GObject.

GtkWidgetPaintable* Gtk::WidgetPaintable::gobj_copy ( )

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

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

noexcept

Glib::PropertyProxy< Widget* > Gtk::WidgetPaintable::property_widget ( )

The observed widget or nullptr if none.

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< Widget* > Gtk::WidgetPaintable::property_widget ( ) const

The observed widget or nullptr if none.

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::WidgetPaintable::set_widget ( Widget& widget )

Sets the widget that should be observed.

Parameters

widget The widget to observe or nullptr.

void Gtk::WidgetPaintable::unset_widget ( )

Friends And Related Function Documentation

Glib::RefPtr< Gtk::WidgetPaintable > wrap	(	GtkWidgetPaintable *	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.

gtkmm: Gtk::WidgetPaintable Class Reference

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation