gtkmm: Gtk::Picture Class Reference

A widget displaying a Gdk::Paintable. More...

#include <gtkmm/picture.h>

Inheritance diagram for Gtk::Picture:

[legend]

Public Member Functions
	Picture (Picture &&src) noexcept

Picture &	operator= (Picture &&src) noexcept

	Picture (const Picture &)=delete

Picture &	operator= (const Picture &)=delete

	~Picture () noexcept override

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

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

	Picture ()

	Picture (const Glib::RefPtr< Gdk::Paintable > &paintable)
	Creates a new Picture displaying paintable.

	Picture (const Glib::RefPtr< Gdk::Pixbuf > &pixbuf)
	Creates a new Picture widget displaying pixbuf.

	Picture (const Glib::RefPtr< Gio::File > & file)
	Creates a new Picture displaying the given file.

	Picture (const std::string &filename)
	Creates a new Picture displaying the file filename.

void	set_paintable (const Glib::RefPtr< Gdk::Paintable > &paintable)
	Makes self display the given paintable.

Glib::RefPtr< Gdk::Paintable >	get_paintable ()
	Gets the `Gdk::Paintable` being displayed by the `Gtk::Picture`.

Glib::RefPtr< const Gdk::Paintable >	get_paintable () const
	Gets the `Gdk::Paintable` being displayed by the `Gtk::Picture`.

void	set_file (const Glib::RefPtr< const Gio::File > & file)
	Makes self load and display file.

Glib::RefPtr< Gio::File >	get_file ()
	Gets the `Gio::File` currently displayed if self is displaying a file.

Glib::RefPtr< const Gio::File >	get_file () const
	Gets the `Gio::File` currently displayed if self is displaying a file.

void	set_filename (const std::string &filename)
	Makes self load and display the given filename.

void	set_resource (const std::string &resource_path)
	Makes self load and display the resource at the given resource_path.

void	set_pixbuf (const Glib::RefPtr< Gdk::Pixbuf > &pixbuf)
	Sets a `Gtk::Picture` to show a `Gdk::Pixbuf`.

void	set_keep_aspect_ratio (bool keep_aspect_ratio=true)
	If set to `true`, the self will render its contents according to their aspect ratio.

bool	get_keep_aspect_ratio () const
	Returns whether the `Gtk::Picture` preserves its contents aspect ratio.

void	set_can_shrink (bool can_shrink=true)
	If set to `true`, the self can be made smaller than its contents.

bool	get_can_shrink () const
	Returns whether the `Gtk::Picture` respects its contents size.

void	set_content_fit (ContentFit content_fit)
	Sets how the content should be resized to fit the `Gtk::Picture`.

ContentFit	get_content_fit () const
	Returns the fit mode for the content of the `Gtk::Picture`.

void	set_alternative_text (const Glib::ustring &alternative_text)
	Sets an alternative textual description for the picture contents.

Glib::ustring	get_alternative_text () const
	Gets the alternative textual description of the picture.

Glib::PropertyProxy< Glib::RefPtr< Gdk::Paintable > >	property_paintable ()
	The `Gdk::Paintable` to be displayed by this `Gtk::Picture`.

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gdk::Paintable > >	property_paintable () const
	The `Gdk::Paintable` to be displayed by this `Gtk::Picture`.

Glib::PropertyProxy< Glib::RefPtr< Gio::File > >	property_file ()
	The `Gio::File` that is displayed or `nullptr` if none.

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gio::File > >	property_file () const
	The `Gio::File` that is displayed or `nullptr` if none.

Glib::PropertyProxy< Glib::ustring >	property_alternative_text ()
	The alternative textual description for the picture.

Glib::PropertyProxy_ReadOnly< Glib::ustring >	property_alternative_text () const
	The alternative textual description for the picture.

Glib::PropertyProxy< bool >	property_keep_aspect_ratio ()
	Whether the GtkPicture will render its contents trying to preserve the aspect ratio.

Glib::PropertyProxy_ReadOnly< bool >	property_keep_aspect_ratio () const
	Whether the GtkPicture will render its contents trying to preserve the aspect ratio.

Glib::PropertyProxy< bool >	property_can_shrink ()
	If the `Gtk::Picture` can be made smaller than the natural size of its contents.

Glib::PropertyProxy_ReadOnly< bool >	property_can_shrink () const
	If the `Gtk::Picture` can be made smaller than the natural size of its contents.

Glib::PropertyProxy< ContentFit >	property_content_fit ()
	How the content should be resized to fit inside the `Gtk::Picture`.

Glib::PropertyProxy_ReadOnly< ContentFit >	property_content_fit () const
	How the content should be resized to fit inside the `Gtk::Picture`.

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.

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

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

Glib::RefPtr< ConstraintTarget >	make_refptr_constrainttarget ()
	Converts this widget to a reference counted Gtk::ConstraintTarget.

Glib::RefPtr< const ConstraintTarget >	make_refptr_constrainttarget () const
	Converts this widget to a reference counted Gtk::ConstraintTarget.

void	show ()
	Flags a widget to be displayed.

void	hide ()
	Reverses the effects of [method.Gtk.Widget.show].

void	queue_draw ()
	Schedules this widget to be redrawn.

void	queue_resize ()
	Flags a widget to have its size renegotiated.

void	queue_allocate ()
	Flags the widget for a rerun of the size_allocate_vfunc() function.

void	size_allocate (const Allocation &allocation, int baseline)
	Allocates widget with a transformation that translates the origin to the position in allocation.

SizeRequestMode	get_request_mode () const
	Gets whether the widget prefers a height-for-width layout or a width-for-height layout.

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.

Measurements	measure (Orientation orientation, int for_size=-1) const
	Like the other overload of measure() but returns a structure holding the sizes/baselines instead of using output parameters.

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.

PreferredSize	get_preferred_size () const
	Like the other overload of get_preferred_size() but returns a structure holding the sizes instead of using output parameters.

void	set_layout_manager (const Glib::RefPtr< LayoutManager > &layout_manager)
	Sets the layout manager to use for measuring and allocating children of the widget.

void	unset_layout_manager ()
	Undoes the effect of a previous call to set_layout_manager().

Glib::RefPtr< LayoutManager >	get_layout_manager ()
	Retrieves the layout manager of the widget.

Glib::RefPtr< const LayoutManager >	get_layout_manager () const
	Retrieves the layout manager of the widget.

bool	mnemonic_activate (bool group_cycling)
	Emits the signal_mnemonic_activate() signal.

bool	activate ()
	For widgets that can be “activated” (buttons, menu items, etc.) this function activates them.

void	set_can_focus (bool can_focus=true)
	Sets whether the input focus can enter the widget or any of its children.

bool	get_can_focus () const
	Determines whether the input focus can enter the widget or any of its children.

void	set_focusable (bool focusable=true)
	Sets whether the widget can own the input focus.

bool	get_focusable () const
	Determines whether the widget can own the input focus.

bool	has_focus () const
	Determines if the widget has the global input focus.

bool	is_focus () const
	Determines if the widget is the focus widget within its toplevel.

bool	has_visible_focus () const
	Determines if the widget should show a visible indication that it has the global input focus.

bool	grab_focus ()
	Causes widget to have the keyboard focus for the window that it belongs to.

void	set_focus_on_click (bool focus_on_click=true)
	Sets whether the widget should grab focus when it is clicked with the mouse.

bool	get_focus_on_click () const
	Returns whether the widget should grab focus when it is clicked with the mouse.

void	set_can_target (bool can_target=true)
	Sets whether the widget can be the target of pointer events.

bool	get_can_target () const
	Queries whether the widget can be the target of pointer events.

bool	has_default () const
	Determines whether the widget is the current default widget within its toplevel.

void	set_receives_default (bool receives_default=true)
	Sets whether the widget will be treated as the default widget within its toplevel when it has the focus, even if another widget is the default.

bool	get_receives_default () const
	Determines whether the widget is always treated as the default widget within its toplevel when it has the focus, even if another widget is the default.

void	set_name (const Glib::ustring & name)
	Sets a widgets name.

void	unset_name ()

Glib::ustring	get_name () const
	Retrieves the name of a widget.

void	set_state_flags (StateFlags flags, bool clear=true)
	Turns on flag values in the current widget state.

void	unset_state_flags (StateFlags flags)
	Turns off flag values for the current widget state.

StateFlags	get_state_flags () const
	Returns the widget state as a flag set.

void	set_sensitive (bool sensitive=true)
	Sets the sensitivity of the widget.

bool	get_sensitive () const
	Returns the widget’s sensitivity.

bool	is_sensitive () const
	Returns the widget’s effective sensitivity.

void	set_visible (bool visible=true)
	Sets the visibility state of widget.

bool	get_visible () const
	Determines whether the widget is visible.

bool	is_visible () const
	Determines whether the widget and all its parents are marked as visible.

bool	is_drawable () const
	Determines whether the widget can be drawn to.

bool	get_realized () const
	Determines whether the widget is realized.

bool	get_mapped () const
	Returns whether the widget is mapped.

void	set_child_visible (bool visible=true)
	Sets whether the widget should be mapped along with its parent.

bool	get_child_visible () const
	Gets the value set with set_child_visible().

int	get_allocated_width () const
	Returns the width that has currently been allocated to the widget.

int	get_allocated_height () const
	Returns the height that has currently been allocated to the widget.

int	get_allocated_baseline () const
	Returns the baseline that has currently been allocated to the widget.

Allocation	get_allocation () const
	Retrieves the widget’s location.

std::optional< Gdk::Graphene::Rect >	compute_bounds (const Widget & target) const
	Computes the bounds for the widget in the coordinate space of target.

std::optional< Gdk::Graphene::Point >	compute_point (const Widget & target, const Gdk::Graphene::Point &point) const
	Translates the given point in the widget's coordinates to coordinates relative to target’s coordinate system.

int	get_width () const
	Returns the content width of the widget.

int	get_height () const
	Returns the content height of the widget.

int	get_baseline () const
	Returns the baseline that has currently been allocated to the widget.

int	get_size (Orientation orientation) const
	Returns the content width or height of the widget.

Widget *	get_parent ()
	Returns the parent widget of the widget.

const Widget *	get_parent () const
	Returns the parent widget of the widget.

Root *	get_root ()
	Returns the `Gtk::Root` widget of the widget.

const Root *	get_root () const
	Returns the `Gtk::Root` widget of the widget.

Native *	get_native ()
	Returns the nearest `Gtk::Native` ancestor of the widget.

const Native *	get_native () const
	Returns the nearest `Gtk::Native` ancestor of the widget.

bool	child_focus (DirectionType direction)
	Called by widgets as the user moves around the window using keyboard shortcuts.

bool	keynav_failed (DirectionType direction)
	Emits the signal_keynav_failed() signal on the widget.

void	error_bell ()
	Notifies the user about an input-related error on the widget.

void	set_size_request (int width=-1, int height=-1)
	Sets the minimum size of the widget.

void	get_size_request (int & width, int &height) const
	Gets the size request that was explicitly set for the widget.

Requisition	get_size_request () const
	Like the other overload of get_size_request() but returns a structure holding the sizes instead of using output parameters.

void	set_opacity (double opacity)
	Requests the widget to be rendered partially transparent.

double	get_opacity () const
	Fetches the requested opacity for the widget.

void	set_overflow (Overflow overflow)
	Sets how the widget treats content that is drawn outside the it's content area.

Overflow	get_overflow () const
	Returns the widget’s overflow value.

Widget *	get_ancestor (GType widget_type)
	Gets the first ancestor of the widget with type widget_type.

const Widget *	get_ancestor (GType widget_type) const
	Gets the first ancestor of the widget with type widget_type.

int	get_scale_factor () const
	Retrieves the internal scale factor that maps from window coordinates to the actual device pixels.

Glib::RefPtr< Gdk::Display >	get_display ()
	Get the display for the window that the widget belongs to.

Glib::RefPtr< const Gdk::Display >	get_display () const
	Get the display for the window that the widget belongs to.

Glib::RefPtr< Settings >	get_settings ()
	Gets the settings object holding the settings used for the widget.

Glib::RefPtr< Gdk::Clipboard >	get_clipboard ()
	Gets the clipboard object for the widget.

Glib::RefPtr< const Gdk::Clipboard >	get_clipboard () const
	Gets the clipboard object for the widget.

Glib::RefPtr< Gdk::Clipboard >	get_primary_clipboard ()
	Gets the primary clipboard of the widget.

Glib::RefPtr< const Gdk::Clipboard >	get_primary_clipboard () const
	Gets the primary clipboard of the widget.

bool	get_hexpand () const
	Gets whether the widget would like any available extra horizontal space.

void	set_hexpand (bool expand=true)
	Sets whether the widget would like any available extra horizontal space.

bool	get_hexpand_set () const
	Gets whether the `hexpand` flag has been explicitly set.

void	set_hexpand_set (bool set=true)
	Sets whether the hexpand flag will be used.

bool	get_vexpand () const
	Gets whether the widget would like any available extra vertical space.

void	set_vexpand (bool expand=true)
	Sets whether the widget would like any available extra vertical space.

bool	get_vexpand_set () const
	Gets whether the `vexpand` flag has been explicitly set.

void	set_vexpand_set (bool set=true)
	Sets whether the vexpand flag will be used.

bool	compute_expand (Orientation orientation)
	Computes whether a parent widget should give this widget extra space when possible.

void	set_expand (bool expand=true)
	Sets whether the widget would like any available extra space in both directions.

Align	get_halign () const
	Gets the horizontal alignment of the widget.

void	set_halign (Align align)
	Sets the horizontal alignment of the widget.

Align	get_valign () const
	Gets the vertical alignment of the widget.

void	set_valign (Align align)
	Sets the vertical alignment of the widget.

int	get_margin_start () const
	Gets the start margin of the widget.

void	set_margin_start (int margin)
	Sets the start margin of the widget.

int	get_margin_end () const
	Gets the end margin of the widget.

void	set_margin_end (int margin)
	Sets the end margin of the widget.

int	get_margin_top () const
	Gets the top margin of the widget.

void	set_margin_top (int margin)
	Sets the top margin of the widget.

int	get_margin_bottom () const
	Gets the bottom margin of the widget.

void	set_margin_bottom (int margin)
	Sets the bottom margin of the widget.

void	set_margin (int margin)
	Set all 4 margins to the same value.

bool	is_ancestor (Widget &ancestor) const
	Determines whether the widget is a descendent of ancestor.

bool	translate_coordinates (Widget &dest_widget, double src_x, double src_y, double &dest_x, double &dest_y)
	Translates coordinates relative to src_widget’s allocation to coordinates relative to dest_widget’s allocations.

bool	contains (double x, double y) const
	Tests if a given point is contained in the widget.

Widget *	pick (double x, double y, PickFlags flags=PickFlags::DEFAULT)
	Finds the descendant of the widget closest to a point.

const Widget *	pick (double x, double y, PickFlags flags=PickFlags::DEFAULT) const
	Finds the descendant of the widget closest to a point.

void	add_controller (const Glib::RefPtr< EventController > &controller)
	Adds an event controller to the widget.

void	remove_controller (const Glib::RefPtr< EventController > &controller)
	Removes an event controller from the widget.

Glib::RefPtr< Pango::Context >	create_pango_context ()
	Creates a new `Pango::Context` that is configured for the widget.

Glib::RefPtr< Pango::Context >	get_pango_context ()
	Gets a `Pango::Context` that is configured for the widget.

void	set_font_options (const Cairo::FontOptions &options)
	Sets the `cairo_font_options_t` used for text rendering in the widget.

void	unset_font_options ()
	Undoes the effect of previous calls to set_font_options().

Cairo::FontOptions	get_font_options () const
	Returns the `cairo_font_options_t` of the widget.

Glib::RefPtr< Pango::Layout >	create_pango_layout (const Glib::ustring &text)
	Creates a new `Pango::Layout` that is configured for the widget.

void	set_direction (TextDirection dir)
	Sets the reading direction on the widget.

TextDirection	get_direction () const
	Gets the reading direction for the widget.

void	set_cursor (const Glib::RefPtr< Gdk::Cursor > &cursor)
	Sets the cursor to be shown when the pointer hovers over the widget.

void	set_cursor (const Glib::ustring & name={})
	Sets a named cursor to be shown when pointer devices point towards the widget.

Glib::RefPtr< Gdk::Cursor >	get_cursor ()
	Gets the cursor set on the widget.

Glib::RefPtr< const Gdk::Cursor >	get_cursor () const
	Gets the cursor set on the widget.

std::vector< Widget * >	list_mnemonic_labels ()
	Returns the widgets for which this widget is the target of a mnemonic.

std::vector< const Widget * >	list_mnemonic_labels () const
	Returns the widgets for which this widget is the target of a mnemonic.

void	add_mnemonic_label (Widget &label)
	Adds a widget to the list of mnemonic labels for this widget.

void	remove_mnemonic_label (Widget &label)
	Removes a widget from the list of mnemonic labels for this widget.

bool	drag_check_threshold (int start_x, int start_y, int current_x, int current_y)
	Checks to see if a drag movement has passed the GTK drag threshold.

Glib::RefPtr< Gdk::FrameClock >	get_frame_clock ()
	Obtains the frame clock for a widget.

Glib::RefPtr< const Gdk::FrameClock >	get_frame_clock () const
	Obtains the frame clock for a widget.

void	set_parent (Widget & parent)
	Sets the parent widget of the widget.

void	unparent ()
	Removes widget from its parent.

void	map ()
	Causes a widget to be mapped if it isn’t already.

void	unmap ()
	Causes a widget to be unmapped if it’s currently mapped.

void	trigger_tooltip_query ()
	Triggers a tooltip query on the display of the widget.

void	set_tooltip_text (const Glib::ustring &text)
	Sets the contents of the tooltip for the widget.

Glib::ustring	get_tooltip_text () const
	Gets the contents of the tooltip for the widget.

void	set_tooltip_markup (const Glib::ustring &markup)
	Sets the contents of the tooltip for widget.

Glib::ustring	get_tooltip_markup () const
	Gets the contents of the tooltip for the widget.

void	set_has_tooltip (bool has_tooltip=TRUE)
	Sets the `has-tooltip` property on the widget.

bool	get_has_tooltip () const
	Returns the current value of the `has-tooltip` property.

bool	in_destruction () const
	Returns whether the widget is currently being destroyed.

Glib::RefPtr< StyleContext >	get_style_context ()
	Returns the style context associated to the widget.

Glib::RefPtr< const StyleContext >	get_style_context () const
	Returns the style context associated to the widget.

guint	add_tick_callback (const SlotTick & slot)
	Queues an animation frame update and adds a callback to be called before each frame.

void	remove_tick_callback (guint id)
	Removes a tick callback previously registered with add_tick_callback().

void	insert_action_group (const Glib::ustring & name, const Glib::RefPtr< Gio::ActionGroup > & group)
	Inserts an action group into the widget's actions.

void	remove_action_group (const Glib::ustring & name)
	Removes a group from the widget.

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.

void	activate_default ()
	Activates the `default.activate` action for the widget.

void	set_font_map (const Glib::RefPtr< Pango::FontMap > &font_map)
	Sets the font map to use for text rendering in the widget.

Glib::RefPtr< Pango::FontMap >	get_font_map ()
	Gets the font map of the widget.

Glib::RefPtr< const Pango::FontMap >	get_font_map () const
	Gets the font map of the widget.

Widget *	get_first_child ()
	Returns the widget’s first child.

const Widget *	get_first_child () const
	Returns the widget’s first child.

Widget *	get_last_child ()
	Returns the widget’s last child.

const Widget *	get_last_child () const
	Returns the widget’s last child.

Widget *	get_next_sibling ()
	Returns the widget’s next sibling.

const Widget *	get_next_sibling () const
	Returns the widget’s next sibling.

Widget *	get_prev_sibling ()
	Returns the widget’s previous sibling.

const Widget *	get_prev_sibling () const
	Returns the widget’s previous sibling.

std::vector< Widget * >	get_children ()
	Gets a vector of the widgetʼs current children, from first child to last.

std::vector< const Widget * >	get_children () const
	Gets a vector of the widgetʼs current children, from first child to last.

Glib::RefPtr< Gio::ListModel >	observe_children ()
	Returns a list model to track the children of the widget.

Glib::RefPtr< const Gio::ListModel >	observe_children () const
	Returns a list model to track the children of the widget.

Glib::RefPtr< Gio::ListModel >	observe_controllers ()
	Returns a list model to track the event controllers of the widget.

Glib::RefPtr< const Gio::ListModel >	observe_controllers () const
	Returns a list model to track the event controllers of the widget.

void	insert_after (Widget & parent, const Widget &previous_sibling)
	Inserts the Widget into the child widget list of parent after previous_sibling.

void	insert_before (Widget & parent, const Widget & next_sibling)
	Inserts the Widget into the child widget list of parent before next_sibling.

void	insert_at_start (Widget & parent)
	Inserts the Widget at the beginning of the child widget list of parent.

void	insert_at_end (Widget & parent)
	Inserts the Widget at the end of the child widget list of parent.

void	snapshot_child (Widget &child, const Glib::RefPtr< Gtk::Snapshot > & snapshot)
	Snapshots a child of the widget.

bool	should_layout () const
	Returns whether the widget should contribute to the measuring and allocation of its parent.

Glib::ustring	get_css_name () const
	Returns the CSS name of the widget.

void	add_css_class (const Glib::ustring &css_class)
	Adds a style class to the widget.

void	remove_css_class (const Glib::ustring &css_class)
	Removes a style from the widget.

bool	has_css_class (const Glib::ustring &css_class) const
	Returns whether a style class is currently applied to the widget.

std::vector< Glib::ustring >	get_css_classes () const
	Returns the list of style classes applied to the widget.

void	set_css_classes (const std::vector< Glib::ustring > &classes)
	Replaces the current style classes of the widget with classes.

Gdk::RGBA	get_color () const
	Gets the current foreground color for the widget's CSS style.

void	set_limit_events (bool limit_events=true)
	Sets whether the widget acts like a modal dialog, with respect to event delivery.

bool	get_limit_events () const
	Gets the value of the property_limit_events() property.

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

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

Glib::SignalProxy< void()>	signal_map ()
	Emitted on mapping of a widget to the screen.

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

Glib::SignalProxy< void()>	signal_realize ()
	Emitted on realization of a widget.

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< void()>	signal_destroy ()
	Emitted during the dispose phase.

Glib::SignalProxy< bool(int, int, bool, const Glib::RefPtr< Tooltip > &)>	signal_query_tooltip ()

Glib::PropertyProxy< Glib::ustring >	property_name ()
	The name of the widget.

Glib::PropertyProxy_ReadOnly< Glib::ustring >	property_name () const
	The name of the widget.

Glib::PropertyProxy_ReadOnly< Widget * >	property_parent () const
	The parent widget of this widget.

Glib::PropertyProxy_ReadOnly< Root * >	property_root () const
	The `Gtk::Root` widget of the widget tree containing this widget.

Glib::PropertyProxy< int >	property_width_request ()
	Overrides for width request of the widget.

Glib::PropertyProxy_ReadOnly< int >	property_width_request () const
	Overrides for width request of the widget.

Glib::PropertyProxy< int >	property_height_request ()
	Overrides for height request of the widget.

Glib::PropertyProxy_ReadOnly< int >	property_height_request () const
	Overrides for height request of the widget.

Glib::PropertyProxy< bool >	property_visible ()
	Whether the widget is visible.

Glib::PropertyProxy_ReadOnly< bool >	property_visible () const
	Whether the widget is visible.

Glib::PropertyProxy< bool >	property_sensitive ()
	Whether the widget responds to input.

Glib::PropertyProxy_ReadOnly< bool >	property_sensitive () const
	Whether the widget responds to input.

Glib::PropertyProxy< bool >	property_can_focus ()
	Whether the widget or any of its descendents can accept the input focus.

Glib::PropertyProxy_ReadOnly< bool >	property_can_focus () const
	Whether the widget or any of its descendents can accept the input focus.

Glib::PropertyProxy_ReadOnly< bool >	property_has_focus () const
	Whether the widget has the input focus.

Glib::PropertyProxy< bool >	property_can_target ()
	Whether the widget can receive pointer events.

Glib::PropertyProxy_ReadOnly< bool >	property_can_target () const
	Whether the widget can receive pointer events.

Glib::PropertyProxy< bool >	property_focus_on_click ()
	Whether the widget should grab focus when it is clicked with the mouse.

Glib::PropertyProxy_ReadOnly< bool >	property_focus_on_click () const
	Whether the widget should grab focus when it is clicked with the mouse.

Glib::PropertyProxy< bool >	property_focusable ()
	Whether this widget itself will accept the input focus.

Glib::PropertyProxy_ReadOnly< bool >	property_focusable () const
	Whether this widget itself will accept the input focus.

Glib::PropertyProxy_ReadOnly< bool >	property_has_default () const
	Whether the widget is the default widget.

Glib::PropertyProxy< bool >	property_receives_default ()
	Whether the widget will receive the default action when it is focused.

Glib::PropertyProxy_ReadOnly< bool >	property_receives_default () const
	Whether the widget will receive the default action when it is focused.

Glib::PropertyProxy< Glib::RefPtr< Gdk::Cursor > >	property_cursor ()
	The cursor used by widget.

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gdk::Cursor > >	property_cursor () const
	The cursor used by widget.

Glib::PropertyProxy< bool >	property_has_tooltip ()
	Enables or disables the emission of the signal_query_tooltip() signal on widget.

Glib::PropertyProxy_ReadOnly< bool >	property_has_tooltip () const
	Enables or disables the emission of the signal_query_tooltip() signal on widget.

Glib::PropertyProxy< Glib::ustring >	property_tooltip_markup ()
	Sets the text of tooltip to be the given string, which is marked up with Pango markup.

Glib::PropertyProxy_ReadOnly< Glib::ustring >	property_tooltip_markup () const
	Sets the text of tooltip to be the given string, which is marked up with Pango markup.

Glib::PropertyProxy< Glib::ustring >	property_tooltip_text ()
	Sets the text of tooltip to be the given string.

Glib::PropertyProxy_ReadOnly< Glib::ustring >	property_tooltip_text () const
	Sets the text of tooltip to be the given string.

Glib::PropertyProxy< Align >	property_halign ()
	How to distribute horizontal space if widget gets extra space.

Glib::PropertyProxy_ReadOnly< Align >	property_halign () const
	How to distribute horizontal space if widget gets extra space.

Glib::PropertyProxy< Align >	property_valign ()
	How to distribute vertical space if widget gets extra space.

Glib::PropertyProxy_ReadOnly< Align >	property_valign () const
	How to distribute vertical space if widget gets extra space.

Glib::PropertyProxy< int >	property_margin_start ()
	Margin on start of widget, horizontally.

Glib::PropertyProxy_ReadOnly< int >	property_margin_start () const
	Margin on start of widget, horizontally.

Glib::PropertyProxy< int >	property_margin_end ()
	Margin on end of widget, horizontally.

Glib::PropertyProxy_ReadOnly< int >	property_margin_end () const
	Margin on end of widget, horizontally.

Glib::PropertyProxy< int >	property_margin_top ()
	Margin on top side of widget.

Glib::PropertyProxy_ReadOnly< int >	property_margin_top () const
	Margin on top side of widget.

Glib::PropertyProxy< int >	property_margin_bottom ()
	Margin on bottom side of widget.

Glib::PropertyProxy_ReadOnly< int >	property_margin_bottom () const
	Margin on bottom side of widget.

Glib::PropertyProxy< bool >	property_hexpand ()
	Whether to expand horizontally.

Glib::PropertyProxy_ReadOnly< bool >	property_hexpand () const
	Whether to expand horizontally.

Glib::PropertyProxy< bool >	property_hexpand_set ()
	Whether to use the `hexpand` property.

Glib::PropertyProxy_ReadOnly< bool >	property_hexpand_set () const
	Whether to use the `hexpand` property.

Glib::PropertyProxy< bool >	property_vexpand ()
	Whether to expand vertically.

Glib::PropertyProxy_ReadOnly< bool >	property_vexpand () const
	Whether to expand vertically.

Glib::PropertyProxy< bool >	property_vexpand_set ()
	Whether to use the `vexpand` property.

Glib::PropertyProxy_ReadOnly< bool >	property_vexpand_set () const
	Whether to use the `vexpand` property.

Glib::PropertyProxy< double >	property_opacity ()
	The requested opacity of the widget.

Glib::PropertyProxy_ReadOnly< double >	property_opacity () const
	The requested opacity of the widget.

Glib::PropertyProxy< Overflow >	property_overflow ()
	How content outside the widget's content area is treated.

Glib::PropertyProxy_ReadOnly< Overflow >	property_overflow () const
	How content outside the widget's content area is treated.

Glib::PropertyProxy_ReadOnly< int >	property_scale_factor () const
	The scale factor of the widget.

Glib::PropertyProxy_ReadOnly< Glib::ustring >	property_css_name () const
	The name of this widget in the CSS tree.

Glib::PropertyProxy< std::vector< Glib::ustring > >	property_css_classes ()
	A list of css classes applied to this widget.

Glib::PropertyProxy_ReadOnly< std::vector< Glib::ustring > >	property_css_classes () const
	A list of css classes applied to this widget.

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.

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.

Glib::PropertyProxy< bool >	property_limit_events ()
	Makes this widget act like a modal dialog, with respect to event delivery.

Glib::PropertyProxy_ReadOnly< bool >	property_limit_events () const
	Makes this widget act like a modal dialog, with respect to event delivery.

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_with_c_callback (const Quark &key, void *data, GDestroyNotify notify)

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.

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

Glib::RefPtr< ATContext >	get_at_context ()
	Retrieves the implementation for the given accessible object.

Glib::RefPtr< const ATContext >	get_at_context () const
	Retrieves the implementation for the given accessible object.

bool	get_platform_state (PlatformState state) const
	Queries a platform state, such as focus.

void	update_platform_state (PlatformState state)
	Informs ATs that the platform state has changed.

Glib::RefPtr< Accessible >	get_accessible_parent ()
	Retrieves the accessible parent for an accessible object.

Glib::RefPtr< const Accessible >	get_accessible_parent () const
	Retrieves the accessible parent for an accessible object.

void	set_accessible_parent (const Glib::RefPtr< Accessible > & parent, const Glib::RefPtr< Accessible > & next_sibling)
	Sets the parent and sibling of an accessible object.

Glib::RefPtr< Accessible >	get_first_accessible_child ()
	Retrieves the first accessible child of an accessible object.

Glib::RefPtr< const Accessible >	get_first_accessible_child () const
	Retrieves the first accessible child of an accessible object.

Glib::RefPtr< Accessible >	get_next_accessible_sibling ()
	Retrieves the next accessible sibling of an accessible object.

Glib::RefPtr< const Accessible >	get_next_accessible_sibling () const
	Retrieves the next accessible sibling of an accessible object.

void	update_next_accessible_sibling (const Glib::RefPtr< Accessible > &new_sibling)
	Updates the next accessible sibling.

bool	get_bounds (int &x, int &y, int & width, int &height) const
	Queries the coordinates and dimensions of this accessible.

Role	get_accessible_role () const
	Retrieves the accessible role of an accessible object.

void	update_state (State state, const Glib::ValueBase & value)
	Updates an accessible state.

void	update_property (Property property, const Glib::ValueBase & value)
	Updates an accessible property.

void	update_relation (Relation relation, const Glib::ValueBase & value)
	Updates an accessible relation.

void	reset_state (State state)
	Resets the accessible state to its default value.

void	reset_property (Property property)
	Resets the accessible property to its default value.

void	reset_relation (Relation relation)
	Resets the accessible relation to its default value.

void	announce (const Glib::ustring & message, AnnouncementPriority priority)
	Requests the user's screen reader to announce the given message.

Glib::PropertyProxy< Role >	property_accessible_role ()
	The accessible role of the given `Gtk::Accessible` implementation.

Glib::PropertyProxy_ReadOnly< Role >	property_accessible_role () const
	The accessible role of the given `Gtk::Accessible` implementation.

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.

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

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

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.

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

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

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.

static void	set_default_direction (TextDirection dir)
	Sets the default reading direction for widgets.

static TextDirection	get_default_direction ()
	Obtains the default reading direction.

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.

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.

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.

Related Symbols
(Note that these are not member symbols.)
Gtk::Picture *	wrap (GtkPicture *object, bool take_copy=false)
	A Glib::wrap() method for this object.

Related Symbols inherited from Gtk::Widget
Gtk::Widget *	wrap (GtkWidget *object, bool take_copy=false)
	A Glib::wrap() method for this object.

Related Symbols inherited from Gtk::Accessible
Glib::RefPtr< Gtk::Accessible >	wrap (GtkAccessible *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.

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

Additional Inherited Members
Public Types inherited from Gtk::Widget
using	PreferredSize = MinimumNatural< Requisition >
	Structure returned by the non-output-parameter overload of get_preferred_size().

using	SlotTick = sigc::slot< bool(const Glib::RefPtr< Gdk::FrameClock > &)>
	Callback type for adding a function to update animations.

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 class	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 , Role::TOGGLE_BUTTON , Role::APPLICATION , Role::PARAGRAPH , Role::BLOCK_QUOTE , Role::ARTICLE , Role::COMMENT , Role::TERMINAL }
	The accessible role for a Gtk::Accessible implementation. More...

enum class	State { State::BUSY , State::CHECKED , State::DISABLED , State::EXPANDED , State::HIDDEN , State::INVALID , State::PRESSED , State::SELECTED , State::VISITED }
	The possible accessible states of a Gtk::Accessible. More...

enum class	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 , Property::HELP_TEXT }
	The possible accessible properties of a Gtk::Accessible. More...

enum class	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 , Relation::LABEL_FOR , Relation::DESCRIPTION_FOR , Relation::CONTROLLED_BY , Relation::DETAILS_FOR , Relation::ERROR_MESSAGE_FOR , Relation::FLOW_FROM }
	The possible accessible relations of a Gtk::Accessible. More...

enum class	PlatformState { PlatformState::FOCUSABLE , PlatformState::FOCUSED , PlatformState::ACTIVE }
	The various platform states which can be queried using Gtk::Accessible::get_platform_state(). More...

enum class	AnnouncementPriority { AnnouncementPriority::LOW , AnnouncementPriority::MEDIUM , AnnouncementPriority::HIGH }
	The priority of an accessibility announcement. 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.

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 resources associated with a widget.

void	unrealize ()
	Causes a widget to be unrealized.

void	realize_if_needed ()

void	set_focus_child (Widget &child)
	Set the focus child of the widget.

void	unset_focus_child ()
	Unsets the focus child of the widget.

Widget *	get_focus_child ()
	Returns the focus child of the widget.

const Widget *	get_focus_child () const
	Returns the focus child of the widget.

virtual void	on_show ()
	This is a default handler for the signal signal_show().

virtual void	on_hide ()
	This is a default handler for the signal signal_hide().

virtual void	on_map ()
	This is a default handler for the signal signal_map().

virtual void	on_unmap ()
	This is a default handler for the signal signal_unmap().

virtual void	on_realize ()
	This is a default handler for the signal signal_realize().

virtual void	on_unrealize ()
	This is a default handler for the signal signal_unrealize().

virtual void	on_state_flags_changed (Gtk::StateFlags previous_state_flags)
	This is a default handler for the signal signal_state_flags_changed().

virtual void	on_direction_changed (TextDirection direction)
	This is a default handler for the signal signal_direction_changed().

virtual bool	on_mnemonic_activate (bool group_cycling)
	This is a default handler for the signal signal_mnemonic_activate().

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().

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.

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

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

Detailed Description

A widget displaying a Gdk::Paintable.

The Gtk::Picture widget displays a Gdk::Paintable. Many convenience functions are provided to make pictures simple to use. For example, if you want to load an image from a file, and then display that, there’s a convenience method to do this: set_filename() or the constructor taking a filename parameter.

If the file isn’t loaded successfully, the picture will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the file with Gdk::Texture::create_from_file(), then create the Gtk::Picture from the texture.

Sometimes an application will want to avoid depending on external data files, such as image files. See the documentation of Gio::Resource for details. In this case, set_resource() should be used.

Sizing the paintable

You can influence how the paintable is displayed inside the Gtk::Picture by changing property_content_fit(). property_can_shrink() can be unset to make sure that paintables are never made smaller than their ideal size - but be careful if you do not know the size of the paintable in use (like when displaying user-loaded images). This can easily cause the picture to grow larger than the screen. And Gtk::Widget::property_halign() and Gtk::Widget::property_valign() can be used to make sure the paintable doesn't fill all available space but is instead displayed at its original size.

Since gtkmm 3.94:

Constructor & Destructor Documentation

◆ Picture() [1/7]

Gtk::Picture::Picture ( Picture && src )

noexcept

◆ Picture() [2/7]

Gtk::Picture::Picture ( const Picture & )

delete

◆ ~Picture()

Gtk::Picture::~Picture ( )

overridenoexcept

◆ Picture() [3/7]

Gtk::Picture::Picture ( )

◆ Picture() [4/7]

Gtk::Picture::Picture ( const Glib::RefPtr< Gdk::Paintable > & paintable )

explicit

Creates a new Picture displaying paintable.

The Picture will track changes to the paintable and update its size and contents in response to it.

Parameters

paintable A Gdk::Paintable or an empty Glib::RefPtr.

◆ Picture() [5/7]

Gtk::Picture::Picture ( const Glib::RefPtr< Gdk::Pixbuf > & pixbuf )

explicit

Creates a new Picture widget displaying pixbuf.

This constructor calls Picture(const Glib::RefPtr<Gdk::Paintable>& paintable). See that constructor for details.

The pixbuf must not be modified after passing it to this constructor.

Parameters

pixbuf A Gdk::Pixbuf or an empty Glib::RefPtr.

Deprecated:: 4.12: Use Gdk::Texture::create_for_pixbuf() and the constructor taking a Gdk::Paintable instead.

◆ Picture() [6/7]

Gtk::Picture::Picture ( const Glib::RefPtr< Gio::File > & file )

explicit

Creates a new Picture displaying the given file.

If the file isn’t found or can’t be loaded, the resulting Picture will be empty.

If you need to detect failures in loading the file, use Gdk::Texture::create_from_file() to load the file yourself, then create the Gtk::Picture from the texture.

Parameters

file	A Gio::File or an empty Glib::RefPtr.

◆ Picture() [7/7]

Gtk::Picture::Picture ( const std::string & filename )

explicit

Creates a new Picture displaying the file filename.

This constructor calls Picture(const Glib::RefPtr<Gio::File>& file). See that constructor for details.

Parameters

filename A filename or an empty string.

Member Function Documentation

◆ get_alternative_text()

Glib::ustring Gtk::Picture::get_alternative_text ( ) const

Gets the alternative textual description of the picture.

The returned string will be nullptr if the picture cannot be described textually.

Returns: The alternative textual description of self.

◆ get_can_shrink()

bool Gtk::Picture::get_can_shrink ( ) const

Returns whether the Gtk::Picture respects its contents size.

Returns: true if the picture can be made smaller than its contents.

◆ get_content_fit()

ContentFit Gtk::Picture::get_content_fit ( ) const

Returns the fit mode for the content of the Gtk::Picture.

See Gtk::ContentFit for details.

Since gtkmm 4.8:

Returns: The content fit mode.

◆ get_file() [1/2]

Glib::RefPtr< Gio::File > Gtk::Picture::get_file ( )

Gets the Gio::File currently displayed if self is displaying a file.

If self is not displaying a file, for example when set_paintable() was used, then nullptr is returned.

Returns: The Gio::File displayed by self.

◆ get_file() [2/2]

Glib::RefPtr< const Gio::File > Gtk::Picture::get_file ( ) const

Gets the Gio::File currently displayed if self is displaying a file.

If self is not displaying a file, for example when set_paintable() was used, then nullptr is returned.

Returns: The Gio::File displayed by self.

◆ get_keep_aspect_ratio()

bool Gtk::Picture::get_keep_aspect_ratio ( ) const

Returns whether the Gtk::Picture preserves its contents aspect ratio.

Deprecated: 4.8: Use get_content_fit() instead. This will now return false only if property_content_fit() is Gtk::ContentFit::FILL. Returns true otherwise.

Deprecated:: Use get_content_fit() instead.

Returns: true if the self tries to keep the contents' aspect ratio.

◆ get_paintable() [1/2]

Glib::RefPtr< Gdk::Paintable > Gtk::Picture::get_paintable ( )

Gets the Gdk::Paintable being displayed by the Gtk::Picture.

Returns: The displayed paintable.

◆ get_paintable() [2/2]

Glib::RefPtr< const Gdk::Paintable > Gtk::Picture::get_paintable ( ) const

Gets the Gdk::Paintable being displayed by the Gtk::Picture.

Returns: The displayed paintable.

◆ get_type()

static GType Gtk::Picture::get_type ( )

static

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

◆ gobj() [1/2]

GtkPicture * Gtk::Picture::gobj ( )

inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const GtkPicture * Gtk::Picture::gobj ( ) const

inline

Provides access to the underlying C GObject.

◆ operator=() [1/2]

Picture & Gtk::Picture::operator= ( const Picture & )

delete

◆ operator=() [2/2]

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

noexcept

◆ property_alternative_text() [1/2]

Glib::PropertyProxy< Glib::ustring > Gtk::Picture::property_alternative_text ( )

The alternative textual description for the picture.

Default value: ""

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_alternative_text() [2/2]

Glib::PropertyProxy_ReadOnly< Glib::ustring > Gtk::Picture::property_alternative_text ( ) const

The alternative textual description for the picture.

Default value: ""

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

◆ property_can_shrink() [1/2]

Glib::PropertyProxy< bool > Gtk::Picture::property_can_shrink ( )

If the Gtk::Picture can be made smaller than the natural size of its contents.

Default value: true

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_can_shrink() [2/2]

Glib::PropertyProxy_ReadOnly< bool > Gtk::Picture::property_can_shrink ( ) const

If the Gtk::Picture can be made smaller than the natural size of its contents.

Default value: true

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

◆ property_content_fit() [1/2]

Glib::PropertyProxy< ContentFit > Gtk::Picture::property_content_fit ( )

How the content should be resized to fit inside the Gtk::Picture.

Since gtkmm 4.8:

Default value: Gtk::ContentFit::CONTAIN

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_content_fit() [2/2]

Glib::PropertyProxy_ReadOnly< ContentFit > Gtk::Picture::property_content_fit ( ) const

How the content should be resized to fit inside the Gtk::Picture.

Since gtkmm 4.8:

Default value: Gtk::ContentFit::CONTAIN

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

◆ property_file() [1/2]

Glib::PropertyProxy< Glib::RefPtr< Gio::File > > Gtk::Picture::property_file ( )

The Gio::File that is displayed 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.

◆ property_file() [2/2]

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gio::File > > Gtk::Picture::property_file ( ) const

The Gio::File that is displayed 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.

◆ property_keep_aspect_ratio() [1/2]

Glib::PropertyProxy< bool > Gtk::Picture::property_keep_aspect_ratio ( )

Whether the GtkPicture will render its contents trying to preserve the aspect ratio.

Deprecated: 4.8: Use property_content_fit() instead.

Deprecated:: Use property_content_fit() instead.

Default value: true

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_keep_aspect_ratio() [2/2]

Glib::PropertyProxy_ReadOnly< bool > Gtk::Picture::property_keep_aspect_ratio ( ) const

Whether the GtkPicture will render its contents trying to preserve the aspect ratio.

Deprecated: 4.8: Use property_content_fit() instead.

Deprecated:: Use property_content_fit() instead.

Default value: true

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

◆ property_paintable() [1/2]

Glib::PropertyProxy< Glib::RefPtr< Gdk::Paintable > > Gtk::Picture::property_paintable ( )

The Gdk::Paintable to be displayed by this Gtk::Picture.

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_paintable() [2/2]

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gdk::Paintable > > Gtk::Picture::property_paintable ( ) const

The Gdk::Paintable to be displayed by this Gtk::Picture.

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

◆ set_alternative_text()

void Gtk::Picture::set_alternative_text ( const Glib::ustring & alternative_text )

Sets an alternative textual description for the picture contents.

It is equivalent to the "alt" attribute for images on websites.

This text will be made available to accessibility tools.

If the picture cannot be described textually, set this property to nullptr.

Parameters

alternative_text A textual description of the contents.

◆ set_can_shrink()

void Gtk::Picture::set_can_shrink ( bool can_shrink = true )

If set to true, the self can be made smaller than its contents.

The contents will then be scaled down when rendering.

If you want to still force a minimum size manually, consider using Gtk::Widget::set_size_request().

Also of note is that a similar function for growing does not exist because the grow behavior can be controlled via Gtk::Widget::set_halign() and Gtk::Widget::set_valign().

Parameters

can_shrink If self can be made smaller than its contents.

◆ set_content_fit()

void Gtk::Picture::set_content_fit ( ContentFit content_fit )

Sets how the content should be resized to fit the Gtk::Picture.

See Gtk::ContentFit for details.

Since gtkmm 4.8:

Parameters

content_fit The content fit mode.

◆ set_file()

void Gtk::Picture::set_file ( const Glib::RefPtr< const Gio::File > & file )

Makes self load and display file.

See new_for_file() for details.

::: warning Note that this function should not be used with untrusted data. Use a proper image loading framework such as libglycin, which can load many image formats into a Gdk::Texture, and then use Gtk::Image::set_from_paintable().

Parameters

file	A `Gio::File`.

◆ set_filename()

void Gtk::Picture::set_filename ( const std::string & filename )

Makes self load and display the given filename.

This is a utility function that calls set_file().

Parameters

filename The filename to play.

◆ set_keep_aspect_ratio()

void Gtk::Picture::set_keep_aspect_ratio ( bool keep_aspect_ratio = true )

If set to true, the self will render its contents according to their aspect ratio.

That means that empty space may show up at the top/bottom or left/right of self.

If set to false or if the contents provide no aspect ratio, the contents will be stretched over the picture's whole area.

Deprecated: 4.8: Use set_content_fit() instead. If still used, this method will always set the property_content_fit() property to Gtk::ContentFit::CONTAIN if keep_aspect_ratio is true, otherwise it will set it to Gtk::ContentFit::FILL.

Deprecated:: Use set_content_fit() instead.

Parameters

keep_aspect_ratio Whether to keep aspect ratio.

◆ set_paintable()

void Gtk::Picture::set_paintable ( const Glib::RefPtr< Gdk::Paintable > & paintable )

Makes self display the given paintable.

If paintable is nullptr, nothing will be displayed.

See new_for_paintable() for details.

Parameters

paintable A Gdk::Paintable.

◆ set_pixbuf()

void Gtk::Picture::set_pixbuf ( const Glib::RefPtr< Gdk::Pixbuf > & pixbuf )

Sets a Gtk::Picture to show a Gdk::Pixbuf.

See new_for_pixbuf() for details.

This is a utility function that calls set_paintable().

Deprecated: 4.12: Use set_paintable() instead

Deprecated:: Use Gdk::Texture::create_for_pixbuf() and set_paintable() instead.

Parameters

pixbuf A Gdk::Pixbuf.

◆ set_resource()

void Gtk::Picture::set_resource ( const std::string & resource_path )

Makes self load and display the resource at the given resource_path.

This is a utility function that calls set_file().

Parameters

resource_path The resource to set.

Friends And Related Symbol Documentation

◆ wrap()

Gtk::Picture * wrap	(	GtkPicture *	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 Member Functions

Static Public Member Functions

Related Symbols

Additional Inherited Members

Detailed Description

Sizing the paintable

Constructor & Destructor Documentation

◆ Picture() [1/7]

◆ Picture() [2/7]

◆ ~Picture()

◆ Picture() [3/7]

◆ Picture() [4/7]

◆ Picture() [5/7]

◆ Picture() [6/7]

◆ Picture() [7/7]

Member Function Documentation

◆ get_alternative_text()

◆ get_can_shrink()

◆ get_content_fit()

◆ get_file() [1/2]

◆ get_file() [2/2]

◆ get_keep_aspect_ratio()

◆ get_paintable() [1/2]

◆ get_paintable() [2/2]

◆ get_type()

◆ gobj() [1/2]

◆ gobj() [2/2]

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ property_alternative_text() [1/2]

◆ property_alternative_text() [2/2]

◆ property_can_shrink() [1/2]

◆ property_can_shrink() [2/2]

◆ property_content_fit() [1/2]

◆ property_content_fit() [2/2]

◆ property_file() [1/2]

◆ property_file() [2/2]

◆ property_keep_aspect_ratio() [1/2]

◆ property_keep_aspect_ratio() [2/2]

◆ property_paintable() [1/2]

◆ property_paintable() [2/2]

◆ set_alternative_text()

◆ set_can_shrink()

◆ set_content_fit()

◆ set_file()

◆ set_filename()

◆ set_keep_aspect_ratio()

◆ set_paintable()

◆ set_pixbuf()

◆ set_resource()

Friends And Related Symbol Documentation

◆ wrap()