gtkmm 4.7.1

Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | Related Functions | List of all members
Gtk::CellArea Class Reference

An abstract base class for laying out CellRenderers. More...

`#include <gtkmm/cellarea.h>`

Inheritance diagram for Gtk::CellArea:
[legend]

## Public Types
typedef sigc::slot< bool(CellRenderer *)> | SlotForeach
| For instance, bool on_foreach(Gtk::CellRenderer* renderer);. More...
typedef sigc::slot< bool(CellRenderer *, const Gdk::Rectangle &, const Gdk::Rectangle &)> | SlotForeachAlloc
| For instance, bool on_foreach(Gtk::CellRenderer* renderer, const Gdk::Rectangle& cell_area, const Gdk::Rectangle& background_area);. 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::CellLayout
typedef sigc::slot< void(const TreeModel::const_iterator &)> | SlotCellData

## Public Member Functions
| CellArea (CellArea && src) noexcept
CellArea & | operator= (CellArea && src) noexcept
| ~CellArea () noexcept override
GtkCellArea * | gobj ()
| Provides access to the underlying C GObject. More...
const GtkCellArea * | gobj () const
| Provides access to the underlying C GObject. More...
GtkCellArea * | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
void | add (CellRenderer & renderer)
| Adds renderer to area with the default child cell properties. More...
void | remove (CellRenderer & renderer)
| Removes renderer from area. More...
bool | has_renderer (CellRenderer & renderer)
| Checks if area contains renderer. More...
void | foreach (const SlotForeach & slot)
| Calls the slot for every CellRenderer in the CellArea. More...
void | foreach (const Glib::RefPtr< CellAreaContext > & context, Widget * widget, const Gdk::Rectangle & cell_area, const Gdk::Rectangle & background_area, const SlotForeachAlloc & slot)
| Calls the slot for every CellRenderer in the CellArea with the allocated rectangle inside the cell_area rectangle. More...
int | event (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, const Glib::RefPtr< const Gdk::Event > & gdk_event, const Gdk::Rectangle & cell_area, GtkCellRendererState flags)
| Delegates event handling to a `Gtk::CellArea`. More...
void | snapshot (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, const Glib::RefPtr< Gtk::Snapshot > & snapshot, const Gdk::Rectangle & background_area, const Gdk::Rectangle & cell_area, CellRendererState flags, bool paint_focus)
| Snapshots area’s cells according to area’s layout onto at the given coordinates. More...
void | get_cell_allocation (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, CellRenderer & renderer, const Gdk::Rectangle & cell_area, Gdk::Rectangle & allocation)
| Derives the allocation of renderer inside area if area were to be renderered in cell_area. More...
CellRenderer * | get_cell_at_position (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, const Gdk::Rectangle & cell_area, int x, int y, Gdk::Rectangle & alloc_area)
| Gets the `Gtk::CellRenderer` at x and y coordinates inside area and optionally returns the full cell allocation for it inside cell_area. More...
const CellRenderer * | get_cell_at_position (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, const Gdk::Rectangle & cell_area, int x, int y, Gdk::Rectangle & alloc_area) const
| Gets the `Gtk::CellRenderer` at x and y coordinates inside area and optionally returns the full cell allocation for it inside cell_area. More...
Glib::RefPtr< CellAreaContext > | create_context () const
| Creates a `Gtk::CellArea`Context to be used with area for all purposes. More...
Glib::RefPtr< CellAreaContext > | copy_context (const Glib::RefPtr< const CellAreaContext > & context)
| This is sometimes needed for cases where rows need to share alignments in one orientation but may be separately grouped in the opposing orientation. More...
SizeRequestMode | get_request_mode () const
| Gets whether the area prefers a height-for-width layout or a width-for-height layout. More...
void | get_preferred_width (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int & minimum_width, int & natural_width)
| Retrieves a cell area’s initial minimum and natural width. More...
void | get_preferred_height_for_width (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int width, int & minimum_height, int & natural_height)
| Retrieves a cell area’s minimum and natural height if it would be given the specified width. More...
void | get_preferred_height (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int & minimum_height, int & natural_height)
| Retrieves a cell area’s initial minimum and natural height. More...
void | get_preferred_width_for_height (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int height, int & minimum_width, int & natural_width)
| Retrieves a cell area’s minimum and natural width if it would be given the specified height. More...
Glib::ustring | get_current_path_string () const
| Gets the current `Gtk::TreePath` string for the currently applied `Gtk::TreeIter`, this is implicitly updated when apply_attributes() is called and can be used to interact with renderers from `Gtk::CellArea` subclasses. More...
void | apply_attributes (const Glib::RefPtr< TreeModel > & tree_model, const TreeModel::iterator & iter, bool is_expander, bool is_expanded)
| Applies any connected attributes to the renderers in area by pulling the values from tree_model. More...
void | attribute_connect (CellRenderer & renderer, const Glib::ustring & attribute, int column)
| Connects an attribute to apply values from column for the `Gtk::TreeModel` in use. More...
void | attribute_disconnect (CellRenderer & renderer, const Glib::ustring & attribute)
| Disconnects attribute for the renderer in area so that attribute will no longer be updated with values from the model. More...
int | attribute_get_column (CellRenderer & renderer, const Glib::ustring & attribute) const
| Returns the model column that an attribute has been mapped to, or -1 if the attribute is not mapped. More...
void | cell_set_property (CellRenderer & renderer, const Glib::ustring & property_name, const Glib::ValueBase & value)
| Sets a cell property for renderer in area. More...
void | cell_get_property (CellRenderer & renderer, const Glib::ustring & property_name, Glib::ValueBase & value)
| Gets the value of a cell property for renderer in area. More...
bool | is_activatable () const
| Returns whether the area can do anything when activated, after applying new attributes to area. More...
bool | activate (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, const Gdk::Rectangle & cell_area, CellRendererState flags, bool edit_only)
| Activates area, usually by activating the currently focused cell, however some subclasses which embed widgets in the area can also activate a widget if it currently has the focus. More...
bool | focus (DirectionType direction)
| This should be called by the area’s owning layout widget when focus is to be passed to area, or moved within area for a given direction and row data. More...
void | set_focus_cell (CellRenderer & renderer)
| Explicitly sets the currently focused cell to renderer. More...
CellRenderer * | get_focus_cell ()
| Retrieves the currently focused cell for area. More...
const CellRenderer * | get_focus_cell () const
| Retrieves the currently focused cell for area. More...
void | add_focus_sibling (CellRenderer & renderer, CellRenderer & sibling)
| Adds sibling to renderer’s focusable area, focus will be drawn around renderer and all of its siblings if renderer can focus for a given row. More...
void | remove_focus_sibling (CellRenderer & renderer, CellRenderer & sibling)
| Removes sibling from renderer’s focus sibling list (see add_focus_sibling()). More...
bool | is_focus_sibling (CellRenderer & renderer, CellRenderer & sibling)
| Returns whether sibling is one of renderer’s focus siblings (see add_focus_sibling()). More...
std::vector< CellRenderer * > | get_focus_siblings (CellRenderer & renderer)
| Gets the focus sibling cell renderers for renderer. More...
std::vector< const CellRenderer * > | get_focus_siblings (const CellRenderer & renderer) const
| Gets the focus sibling cell renderers for renderer. More...
CellRenderer * | get_focus_from_sibling (CellRenderer & renderer)
| Gets the `Gtk::CellRenderer` which is expected to be focusable for which renderer is, or may be a sibling. More...
const CellRenderer * | get_focus_from_sibling (CellRenderer & renderer) const
| Gets the `Gtk::CellRenderer` which is expected to be focusable for which renderer is, or may be a sibling. More...
CellRenderer * | get_edited_cell ()
| Gets the `Gtk::CellRenderer` in area that is currently being edited. More...
const CellRenderer * | get_edited_cell () const
| Gets the `Gtk::CellRenderer` in area that is currently being edited. More...
CellEditable * | get_edit_widget ()
| Gets the `Gtk::CellEditable` widget currently used to edit the currently edited cell. More...
const CellEditable * | get_edit_widget () const
| Gets the `Gtk::CellEditable` widget currently used to edit the currently edited cell. More...
bool | activate_cell (Widget & widget, CellRenderer & renderer, const Glib::RefPtr< const Gdk::Event > & gdk_event, const Gdk::Rectangle & cell_area, CellRendererState flags)
| This is used by `Gtk::CellArea` subclasses when handling events to activate cells, the base `Gtk::CellArea` class activates cells for keyboard events for free in its own GtkCellArea->activate() implementation. More...
void | stop_editing (bool canceled)
| Explicitly stops the editing of the currently edited cell. More...
void | inner_cell_area (Widget & widget, const Gdk::Rectangle & cell_area, Gdk::Rectangle & inner_area)
| This is a convenience function for `Gtk::CellArea` implementations to get the inner area where a given `Gtk::CellRenderer` will be rendered. More...
void | request_renderer (CellRenderer & renderer, Orientation orientation, Widget & widget, int for_size, int & minimum_size, int & natural_size)
| This is a convenience function for `Gtk::CellArea` implementations to request size for cell renderers. 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 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 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::CellLayout
| CellLayout (CellLayout && src) noexcept
CellLayout & | operator= (CellLayout && src) noexcept
| ~CellLayout () noexcept override
GtkCellLayout * | gobj ()
| Provides access to the underlying C GObject. More...
const GtkCellLayout * | gobj () const
| Provides access to the underlying C GObject. More...
template<class ColumnType >
void | pack_start (const TreeModelColumn< ColumnType > & model_column, bool expand=true)
void | pack_start (CellRenderer & cell, bool expand=true)
| Packs the cell into the beginning of cell_layout. More...
void | pack_end (CellRenderer & cell, bool expand=true)
| Adds the cell to the end of cell_layout. More...
std::vector< CellRenderer * > | get_cells ()
| Returns the cell renderers which have been added to cell_layout. More...
std::vector< const CellRenderer * > | get_cells () const
| Returns the cell renderers which have been added to cell_layout. More...
CellRenderer * | get_first_cell ()
| Gets the CellRenderer for the first column if any has been added, or nullptr otherwise. More...
const CellRenderer * | get_first_cell () const
| Gets the CellRenderer for the first column if any has been added, or nullptr otherwise. More...
void | clear ()
| Unsets all the mappings on all renderers on cell_layout and removes all renderers from cell_layout. More...
void | add_attribute (CellRenderer & cell, const Glib::ustring & attribute, int column)
| Adds an attribute mapping to the list in cell_layout. More...
void | add_attribute (const Glib::PropertyProxy_Base & property, const TreeModelColumnBase & column)
void | add_attribute (CellRenderer & cell, const Glib::ustring & attribute, const TreeModelColumnBase & column)
void | set_cell_data_func (CellRenderer & cell, const SlotCellData & slot)
void | clear_attributes (CellRenderer & cell)
| Clears all existing attributes previously set with set_attributes(). More...
void | reorder (CellRenderer & cell, int position)
| Re-inserts cell at position. More...
Glib::RefPtr< CellArea > | get_area ()
| Returns the underlying `Gtk::CellArea` which might be cell_layout if called on a `Gtk::CellArea` or might be `nullptr` if no `Gtk::CellArea` is used by cell_layout. More...
Glib::RefPtr< const CellArea > | get_area () const
| Returns the underlying `Gtk::CellArea` which might be cell_layout if called on a `Gtk::CellArea` or might be `nullptr` if no `Gtk::CellArea` is used by cell_layout. More...
template<class T_ModelColumnType >
void | pack_start (const TreeModelColumn< T_ModelColumnType > & column, bool expand)

## 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::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::CellLayout
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
| CellArea ()
Glib::SignalProxy< void(const Glib::RefPtr< TreeModel > &, const TreeModel::iterator &, bool, bool)> | signal_apply_attributes ()
Glib::SignalProxy< void(CellRenderer *, CellEditable *, const Gdk::Rectangle &, const Glib::ustring &)> | signal_add_editable ()
Glib::SignalProxy< void(CellRenderer *, CellEditable *)> | signal_remove_editable ()
Glib::SignalProxy< void(CellRenderer *, const Glib::ustring &)> | signal_focus_changed ()
virtual void | snapshot_vfunc (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, const Glib::RefPtr< Gtk::Snapshot > &snapshot, const Gdk::Rectangle & background_area, const Gdk::Rectangle & cell_area, CellRendererState flags, bool paint_focus)
virtual SizeRequestMode | get_request_mode_vfunc () const
virtual void | get_preferred_width_vfunc (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int & minimum_width, int & natural_width)
virtual void | get_preferred_height_for_width_vfunc (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int width, int & minimum_height, int & natural_height)
virtual void | get_preferred_height_vfunc (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int & minimum_height, int & natural_height)
virtual void | get_preferred_width_for_height_vfunc (const Glib::RefPtr< CellAreaContext > & context, Widget & widget, int height, int & minimum_width, int & natural_width)
Glib::PropertyProxy< CellRenderer * > | property_focus_cell ()
| The cell in the area that currently has focus. More...
Glib::PropertyProxy_ReadOnly< CellRenderer * > | property_focus_cell () const
| The cell in the area that currently has focus. More...
Glib::PropertyProxy_ReadOnly< CellRenderer * > | property_edited_cell () const
| The cell in the area that is currently edited. More...
Glib::PropertyProxy_ReadOnly< CellEditable * > | property_edit_widget () const
| The widget currently editing the edited cell. More...
virtual void | on_apply_attributes (const Glib::RefPtr< TreeModel > & tree_model, const TreeModel::iterator & iter, bool is_expander, bool is_expanded)
| This is a default handler for the signal signal_apply_attributes(). 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::Buildable
| Buildable ()
| You should derive from this class to use it. More...
Protected Member Functions inherited from Gtk::CellLayout
| CellLayout ()
| You should derive from this class to use it. More...
virtual void | pack_start_vfunc (CellRenderer * cell, bool expand)
virtual void | pack_end_vfunc (CellRenderer * cell, bool expand)
virtual void | clear_vfunc ()
virtual void | add_attribute_vfunc (CellRenderer * cell, const Glib::ustring & attribute, int column)
virtual void | clear_attributes_vfunc (CellRenderer * cell)
virtual void | reorder_vfunc (CellRenderer * cell, int position)

## Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gtk::CellArea > | wrap (GtkCellArea * 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::CellLayout
Glib::RefPtr< Gtk::CellLayout > | wrap (GtkCellLayout * object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Detailed Description

An abstract base class for laying out CellRenderers.

This is an abstract base class for CellLayout widgets (also referred to as "layouting widgets") to interface with an arbitrary number of CellRenderers and interact with the user for a given TreeModel row.

The cell area handles events, focus navigation, drawing and size requests and allocations for a given row of data.

Usually users dont have to interact with the CellArea directly unless they are implementing a cell layouting widget themselves.

## Requesting area sizes

As outlined in Gtk::Widget's geometry management description, GTK+ uses a height-for-width geometry management system to compute the sizes of widgets and user interfaces. CellArea uses the same semantics to calculate the size of an area for an arbitrary number of TreeModel rows.

When requesting the size of a cell area one needs to calculate the size for a handful of rows, and this will be done differently by different layouting widgets. For instance a TreeViewColumn always lines up the areas from top to bottom while an IconView, on the other hand, might enforce that all areas received the same width and wrap the areas around, requesting height for more cell areas when allocated less width.

It's also important for areas to maintain some cell alignments with areas rendered for adjacent rows (cells can appear "columnized" inside an area even when the size of cells are different in each row). For this reason the CellArea uses a CellAreaContext object to store the alignments and sizes along the way (as well as the overall largest minimum and natural size for all the rows which have been calculated with the said context).

The CellAreaContext is an opaque object specific to the CellArea which created it (see CellArea::create_context()). The owning cell-layouting widget can create as many contexts as it wishes to calculate sizes of rows which should receive the same size in at least one orientation (horizontally or vertically). However, it's important that the same CellAreaContext which was used to request the sizes for a given TreeModel row be used when rendering or processing events for that row.

## Cell Properties

The CellArea introduces cell properties for CellRenderers. This provides some general interfaces for defining the relationship cell areas have with their cells. For instance in a CellAreaBox a cell might “expand” and receive extra space when the area is allocated more than its full natural request, or a cell might be configured to “align” with adjacent rows which were requested and rendered with the same CellAreaContext.

To set the value of a cell property, use cell_set_property(). To obtain the value of a cell property, use cell_get_property().

Since gtkmm 3.0:

## Member Typedef Documentation

## ◆ SlotForeach

typedef sigc::slot<bool(CellRenderer*)> Gtk::CellArea::SlotForeach

For instance, bool on_foreach(Gtk::CellRenderer* renderer);.

Parameters

  renderer | the cell renderer to operate on

Returns
  true to stop iterating over cells.

Since gtkmm 3.4:

## ◆ SlotForeachAlloc

typedef sigc::slot<bool(CellRenderer*, const Gdk::Rectangle&, const Gdk::Rectangle&)> Gtk::CellArea::SlotForeachAlloc

For instance, bool on_foreach(Gtk::CellRenderer* renderer, const Gdk::Rectangle& cell_area, const Gdk::Rectangle& background_area);.

Parameters

  renderer | the cell renderer to operate on
  cell_area | the area allocated to the renderer inside the rectangle provided to foreach().
  background_area | The background area for the renderer inside the background area provided to foreach().

Returns
  true to stop iterating over cells.

Since gtkmm 3.4:

## Constructor & Destructor Documentation

## ◆ CellArea() [1/2]

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

## ◆ ~CellArea()

Gtk::CellArea::~CellArea | ( |  | ) |
| override noexcept

## ◆ CellArea() [2/2]

Gtk::CellArea::CellArea | ( |  | ) |
| protected

## Member Function Documentation

## ◆ activate()

bool Gtk::CellArea::activate | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | const Gdk::Rectangle & | cell_area,
|  | CellRendererState | flags,
|  | bool | edit_only
| ) |  |

Activates area, usually by activating the currently focused cell, however some subclasses which embed widgets in the area can also activate a widget if it currently has the focus.

Parameters

  context | The `Gtk::CellArea`Context in context with the current row data.
  widget | The `Gtk::Widget` that area is rendering on.
  cell_area | The size and location of area relative to widget’s allocation.
  flags | The `Gtk::CellRenderer`State flags for area for this row of data.
  edit_only | If `true` then only cell renderers that are Gtk::CellRendererMode::EDITABLE will be activated.

Returns
  Whether area was successfully activated.

## ◆ activate_cell()

bool Gtk::CellArea::activate_cell | ( | Widget & | widget,
|  | CellRenderer & | renderer,
|  | const Glib::RefPtr< const Gdk::Event > & | gdk_event,
|  | const Gdk::Rectangle & | cell_area,
|  | CellRendererState | flags
| ) |  |

This is used by `Gtk::CellArea` subclasses when handling events to activate cells, the base `Gtk::CellArea` class activates cells for keyboard events for free in its own GtkCellArea->activate() implementation.

Parameters

  widget | The `Gtk::Widget` that area is rendering onto.
  renderer | The `Gtk::CellRenderer` in area to activate.
  gdk_event | The `Gdk::Event` for which cell activation should occur.
  cell_area | The `Gdk::Rectangle` in widget relative coordinates of renderer for the current row.
  flags | The `Gtk::CellRenderer`State for renderer.

Returns
  Whether cell activation was successful.

## ◆ add()

void Gtk::CellArea::add | ( | CellRenderer & | renderer | ) |

Adds renderer to area with the default child cell properties.

Parameters

  renderer | The `Gtk::CellRenderer` to add to area.

## ◆ add_focus_sibling()

void Gtk::CellArea::add_focus_sibling | ( | CellRenderer & | renderer,
|  | CellRenderer & | sibling
| ) |  |

Adds sibling to renderer’s focusable area, focus will be drawn around renderer and all of its siblings if renderer can focus for a given row.

Events handled by focus siblings can also activate the given focusable renderer.

Parameters

  renderer | The `Gtk::CellRenderer` expected to have focus.
  sibling | The `Gtk::CellRenderer` to add to renderer’s focus area.

## ◆ apply_attributes()

void Gtk::CellArea::apply_attributes | ( | const Glib::RefPtr< TreeModel > & | tree_model,
|  | const TreeModel::iterator & | iter,
|  | bool | is_expander,
|  | bool | is_expanded
| ) |  |

Applies any connected attributes to the renderers in area by pulling the values from tree_model.

Parameters

  tree_model | The `Gtk::TreeModel` to pull values from.
  iter | The `Gtk::TreeIter` in tree_model to apply values for.
  is_expander | Whether iter has children.
  is_expanded | Whether iter is expanded in the view and children are visible.

## ◆ attribute_connect()

void Gtk::CellArea::attribute_connect | ( | CellRenderer & | renderer,
|  | const Glib::ustring & | attribute,
|  | int | column
| ) |  |

Connects an attribute to apply values from column for the `Gtk::TreeModel` in use.

Parameters

  renderer | The `Gtk::CellRenderer` to connect an attribute for.
  attribute | The attribute name.
  column | The `Gtk::TreeModel` column to fetch attribute values from.

## ◆ attribute_disconnect()

void Gtk::CellArea::attribute_disconnect | ( | CellRenderer & | renderer,
|  | const Glib::ustring & | attribute
| ) |  |

Disconnects attribute for the renderer in area so that attribute will no longer be updated with values from the model.

Parameters

  renderer | The `Gtk::CellRenderer` to disconnect an attribute for.
  attribute | The attribute name.

## ◆ attribute_get_column()

int Gtk::CellArea::attribute_get_column | ( | CellRenderer & | renderer,
|  | const Glib::ustring & | attribute
| ) |  | const

Returns the model column that an attribute has been mapped to, or -1 if the attribute is not mapped.

Parameters

  renderer | A `Gtk::CellRenderer`.
  attribute | An attribute on the renderer.

Returns
  The model column, or -1.

## ◆ cell_get_property()

void Gtk::CellArea::cell_get_property | ( | CellRenderer & | renderer,
|  | const Glib::ustring & | property_name,
|  | Glib::ValueBase & | value
| ) |  |

Gets the value of a cell property for renderer in area.

Parameters

  renderer | A `Gtk::CellRenderer` inside area.
  property_name | The name of the property to get.
  value | A location to return the value.

## ◆ cell_set_property()

void Gtk::CellArea::cell_set_property | ( | CellRenderer & | renderer,
|  | const Glib::ustring & | property_name,
|  | const Glib::ValueBase & | value
| ) |  |

Sets a cell property for renderer in area.

Parameters

  renderer | A `Gtk::CellRenderer` inside area.
  property_name | The name of the cell property to set.
  value | The value to set the cell property to.

## ◆ copy_context()

Glib::RefPtr<CellAreaContext> Gtk::CellArea::copy_context | ( | const Glib::RefPtr< const CellAreaContext > & | context | ) |

This is sometimes needed for cases where rows need to share alignments in one orientation but may be separately grouped in the opposing orientation.

For instance, `Gtk::IconView` creates all icons (rows) to have the same width and the cells theirin to have the same horizontal alignments. However each row of icons may have a separate collective height. `Gtk::IconView` uses this to request the heights of each row based on a context which was already used to request all the row widths that are to be displayed.

Parameters

  context | The `Gtk::CellArea`Context to copy.

Returns
  A newly created `Gtk::CellArea`Context copy of context.

## ◆ create_context()

Glib::RefPtr<CellAreaContext> Gtk::CellArea::create_context | ( |  | ) | const

Creates a `Gtk::CellArea`Context to be used with area for all purposes.

`Gtk::CellArea`Context stores geometry information for rows for which it was operated on, it is important to use the same context for the same row of data at all times (i.e. one should render and handle events with the same `Gtk::CellArea`Context which was used to request the size of those rows of data).

Returns
  A newly created `Gtk::CellArea`Context which can be used with area.

## ◆ event()

int Gtk::CellArea::event | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | const Glib::RefPtr< const Gdk::Event > & | gdk_event,
|  | const Gdk::Rectangle & | cell_area,
|  | GtkCellRendererState | flags
| ) |  |

Delegates event handling to a `Gtk::CellArea`.

Parameters

  context | The `Gtk::CellArea`Context for this row of data.
  widget | The `Gtk::Widget` that area is rendering to.
  gdk_event | The `Gdk::Event` to handle.
  cell_area | The widget relative coordinates for area.
  flags | The `Gtk::CellRenderer`State for area in this row.

Returns
  `true` if the event was handled by area.

## ◆ focus()

bool Gtk::CellArea::focus | ( | DirectionType | direction | ) |

This should be called by the area’s owning layout widget when focus is to be passed to area, or moved within area for a given direction and row data.

Implementing `Gtk::CellArea` classes should implement this method to receive and navigate focus in its own way particular to how it lays out cells.

Parameters

  direction | The `Gtk::DirectionType`.

Returns
  `true` if focus remains inside area as a result of this call.

## ◆ foreach() [1/2]

void Gtk::CellArea::foreach | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget * | widget,
|  | const Gdk::Rectangle & | cell_area,
|  | const Gdk::Rectangle & | background_area,
|  | const SlotForeachAlloc & | slot
| ) |  |

Calls the slot for every CellRenderer in the CellArea with the allocated rectangle inside the cell_area rectangle.

Parameters

  context | The CellAreaContext for this row of data.
  widget | The widget that the CellArea is rendering to.
  cell_area | The widget-relative coordinates and size for the CellArea.
  background_area | The widget-relative coordinates of the background area.
  slot | The slot to call for every CellRenderer.

Since gtkmm 3.4:

## ◆ foreach() [2/2]

void Gtk::CellArea::foreach | ( | const SlotForeach & | slot | ) |

Calls the slot for every CellRenderer in the CellArea.

Parameters

  slot | The slot to call for every CellRenderer.

Since gtkmm 3.4:

## ◆ get_cell_allocation()

void Gtk::CellArea::get_cell_allocation | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | CellRenderer & | renderer,
|  | const Gdk::Rectangle & | cell_area,
|  | Gdk::Rectangle & | allocation
| ) |  |

Derives the allocation of renderer inside area if area were to be renderered in cell_area.

Parameters

  context | The `Gtk::CellArea`Context used to hold sizes for area.
  widget | The `Gtk::Widget` that area is rendering on.
  renderer | The `Gtk::CellRenderer` to get the allocation for.
  cell_area | The whole allocated area for area in widget for this row.
  allocation | Where to store the allocation for renderer.

## ◆ get_cell_at_position() [1/2]

CellRenderer* Gtk::CellArea::get_cell_at_position | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | const Gdk::Rectangle & | cell_area,
|  | int | x,
|  | int | y,
|  | Gdk::Rectangle & | alloc_area
| ) |  |

Gets the `Gtk::CellRenderer` at x and y coordinates inside area and optionally returns the full cell allocation for it inside cell_area.

Parameters

  context | The `Gtk::CellArea`Context used to hold sizes for area.
  widget | The `Gtk::Widget` that area is rendering on.
  cell_area | The whole allocated area for area in widget for this row.
  x | The x position.
  y | The y position.
  alloc_area | Where to store the inner allocated area of the returned cell renderer.

Returns
  The `Gtk::CellRenderer` at x and y.

## ◆ get_cell_at_position() [2/2]

const CellRenderer* Gtk::CellArea::get_cell_at_position | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | const Gdk::Rectangle & | cell_area,
|  | int | x,
|  | int | y,
|  | Gdk::Rectangle & | alloc_area
| ) |  | const

Gets the `Gtk::CellRenderer` at x and y coordinates inside area and optionally returns the full cell allocation for it inside cell_area.

Parameters

  context | The `Gtk::CellArea`Context used to hold sizes for area.
  widget | The `Gtk::Widget` that area is rendering on.
  cell_area | The whole allocated area for area in widget for this row.
  x | The x position.
  y | The y position.
  alloc_area | Where to store the inner allocated area of the returned cell renderer.

Returns
  The `Gtk::CellRenderer` at x and y.

## ◆ get_current_path_string()

Glib::ustring Gtk::CellArea::get_current_path_string | ( |  | ) | const

Gets the current `Gtk::TreePath` string for the currently applied `Gtk::TreeIter`, this is implicitly updated when apply_attributes() is called and can be used to interact with renderers from `Gtk::CellArea` subclasses.

Returns
  The current `Gtk::TreePath` string for the current attributes applied to area. This string belongs to the area and should not be freed.

## ◆ get_edit_widget() [1/2]

CellEditable* Gtk::CellArea::get_edit_widget | ( |  | ) |

Gets the `Gtk::CellEditable` widget currently used to edit the currently edited cell.

Returns
  The currently active `Gtk::CellEditable` widget.

## ◆ get_edit_widget() [2/2]

const CellEditable* Gtk::CellArea::get_edit_widget | ( |  | ) | const

Gets the `Gtk::CellEditable` widget currently used to edit the currently edited cell.

Returns
  The currently active `Gtk::CellEditable` widget.

## ◆ get_edited_cell() [1/2]

CellRenderer* Gtk::CellArea::get_edited_cell | ( |  | ) |

Gets the `Gtk::CellRenderer` in area that is currently being edited.

Returns
  The currently edited `Gtk::CellRenderer`.

## ◆ get_edited_cell() [2/2]

const CellRenderer* Gtk::CellArea::get_edited_cell | ( |  | ) | const

Gets the `Gtk::CellRenderer` in area that is currently being edited.

Returns
  The currently edited `Gtk::CellRenderer`.

## ◆ get_focus_cell() [1/2]

CellRenderer* Gtk::CellArea::get_focus_cell | ( |  | ) |

Retrieves the currently focused cell for area.

Returns
  The currently focused cell in area.

## ◆ get_focus_cell() [2/2]

const CellRenderer* Gtk::CellArea::get_focus_cell | ( |  | ) | const

Retrieves the currently focused cell for area.

Returns
  The currently focused cell in area.

## ◆ get_focus_from_sibling() [1/2]

CellRenderer* Gtk::CellArea::get_focus_from_sibling | ( | CellRenderer & | renderer | ) |

Gets the `Gtk::CellRenderer` which is expected to be focusable for which renderer is, or may be a sibling.

This is handy for `Gtk::CellArea` subclasses when handling events, after determining the renderer at the event location it can then chose to activate the focus cell for which the event cell may have been a sibling.

Parameters

  renderer | The `Gtk::CellRenderer`.

Returns
  The `Gtk::CellRenderer` for which renderer is a sibling.

## ◆ get_focus_from_sibling() [2/2]

const CellRenderer* Gtk::CellArea::get_focus_from_sibling | ( | CellRenderer & | renderer | ) | const

Gets the `Gtk::CellRenderer` which is expected to be focusable for which renderer is, or may be a sibling.

This is handy for `Gtk::CellArea` subclasses when handling events, after determining the renderer at the event location it can then chose to activate the focus cell for which the event cell may have been a sibling.

Parameters

  renderer | The `Gtk::CellRenderer`.

Returns
  The `Gtk::CellRenderer` for which renderer is a sibling.

## ◆ get_focus_siblings() [1/2]

std::vector<CellRenderer*> Gtk::CellArea::get_focus_siblings | ( | CellRenderer & | renderer | ) |

Gets the focus sibling cell renderers for renderer.

Parameters

  renderer | The `Gtk::CellRenderer` expected to have focus.

Returns
  A `GList` of `Gtk::CellRenderer`s. The returned list is internal and should not be freed.

## ◆ get_focus_siblings() [2/2]

std::vector<const CellRenderer*> Gtk::CellArea::get_focus_siblings | ( | const CellRenderer & | renderer | ) | const

Gets the focus sibling cell renderers for renderer.

Parameters

  renderer | The `Gtk::CellRenderer` expected to have focus.

Returns
  A `GList` of `Gtk::CellRenderer`s. The returned list is internal and should not be freed.

## ◆ get_preferred_height()

void Gtk::CellArea::get_preferred_height | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int & | minimum_height,
|  | int & | natural_height
| ) |  |

Retrieves a cell area’s initial minimum and natural height.

area will store some geometrical information in context along the way; when requesting sizes over an arbitrary number of rows, it’s not important to check the minimum_height and natural_height of this call but rather to consult Gtk::CellAreaContext::get_preferred_height() after a series of requests.

Parameters

  context | The `Gtk::CellArea`Context to perform this request with.
  widget | The `Gtk::Widget` where area will be rendering.
  minimum_height | Location to store the minimum height.
  natural_height | Location to store the natural height.

## ◆ get_preferred_height_for_width()

void Gtk::CellArea::get_preferred_height_for_width | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int | width,
|  | int & | minimum_height,
|  | int & | natural_height
| ) |  |

Retrieves a cell area’s minimum and natural height if it would be given the specified width.

area stores some geometrical information in context along the way while calling get_preferred_width(). It’s important to perform a series of get_preferred_width() requests with context first and then call get_preferred_height_for_width() on each cell area individually to get the height for width of each fully requested row.

If at some point, the width of a single row changes, it should be requested with get_preferred_width() again and then the full width of the requested rows checked again with Gtk::CellAreaContext::get_preferred_width().

Parameters

  context | The `Gtk::CellArea`Context which has already been requested for widths.
  widget | The `Gtk::Widget` where area will be rendering.
  width | The width for which to check the height of this area.
  minimum_height | Location to store the minimum height.
  natural_height | Location to store the natural height.

## ◆ get_preferred_height_for_width_vfunc()

virtual void Gtk::CellArea::get_preferred_height_for_width_vfunc | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int | width,
|  | int & | minimum_height,
|  | int & | natural_height
| ) |  |
| protected virtual

## ◆ get_preferred_height_vfunc()

virtual void Gtk::CellArea::get_preferred_height_vfunc | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int & | minimum_height,
|  | int & | natural_height
| ) |  |
| protected virtual

## ◆ get_preferred_width()

void Gtk::CellArea::get_preferred_width | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int & | minimum_width,
|  | int & | natural_width
| ) |  |

Retrieves a cell area’s initial minimum and natural width.

area will store some geometrical information in context along the way; when requesting sizes over an arbitrary number of rows, it’s not important to check the minimum_width and natural_width of this call but rather to consult Gtk::CellAreaContext::get_preferred_width() after a series of requests.

Parameters

  context | The `Gtk::CellArea`Context to perform this request with.
  widget | The `Gtk::Widget` where area will be rendering.
  minimum_width | Location to store the minimum width.
  natural_width | Location to store the natural width.

## ◆ get_preferred_width_for_height()

void Gtk::CellArea::get_preferred_width_for_height | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int | height,
|  | int & | minimum_width,
|  | int & | natural_width
| ) |  |

Retrieves a cell area’s minimum and natural width if it would be given the specified height.

area stores some geometrical information in context along the way while calling get_preferred_height(). It’s important to perform a series of get_preferred_height() requests with context first and then call get_preferred_width_for_height() on each cell area individually to get the height for width of each fully requested row.

If at some point, the height of a single row changes, it should be requested with get_preferred_height() again and then the full height of the requested rows checked again with Gtk::CellAreaContext::get_preferred_height().

Parameters

  context | The `Gtk::CellArea`Context which has already been requested for widths.
  widget | The `Gtk::Widget` where area will be rendering.
  height | The height for which to check the width of this area.
  minimum_width | Location to store the minimum width.
  natural_width | Location to store the natural width.

## ◆ get_preferred_width_for_height_vfunc()

virtual void Gtk::CellArea::get_preferred_width_for_height_vfunc | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int | height,
|  | int & | minimum_width,
|  | int & | natural_width
| ) |  |
| protected virtual

## ◆ get_preferred_width_vfunc()

virtual void Gtk::CellArea::get_preferred_width_vfunc | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | int & | minimum_width,
|  | int & | natural_width
| ) |  |
| protected virtual

## ◆ get_request_mode()

SizeRequestMode Gtk::CellArea::get_request_mode | ( |  | ) | const

Gets whether the area prefers a height-for-width layout or a width-for-height layout.

Returns
  The `Gtk::SizeRequestMode` preferred by area.

## ◆ get_request_mode_vfunc()

virtual SizeRequestMode Gtk::CellArea::get_request_mode_vfunc | ( |  | ) | const
| protected virtual

## ◆ get_type()

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

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

## ◆ gobj() [1/2]

GtkCellArea* Gtk::CellArea::gobj | ( |  | ) |
| inline

Provides access to the underlying C GObject.

## ◆ gobj() [2/2]

const GtkCellArea* Gtk::CellArea::gobj | ( |  | ) | const
| inline

Provides access to the underlying C GObject.

## ◆ gobj_copy()

GtkCellArea* Gtk::CellArea::gobj_copy | ( |  | ) |

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

## ◆ has_renderer()

bool Gtk::CellArea::has_renderer | ( | CellRenderer & | renderer | ) |

Checks if area contains renderer.

Parameters

  renderer | The `Gtk::CellRenderer` to check.

Returns
  `true` if renderer is in the area.

## ◆ inner_cell_area()

void Gtk::CellArea::inner_cell_area | ( | Widget & | widget,
|  | const Gdk::Rectangle & | cell_area,
|  | Gdk::Rectangle & | inner_area
| ) |  |

This is a convenience function for `Gtk::CellArea` implementations to get the inner area where a given `Gtk::CellRenderer` will be rendered.

It removes any padding previously added by request_renderer().

Parameters

  widget | The `Gtk::Widget` that area is rendering onto.
  cell_area | The widget relative coordinates where one of area’s cells is to be placed.
  inner_area | The return location for the inner cell area.

## ◆ is_activatable()

bool Gtk::CellArea::is_activatable | ( |  | ) | const

Returns whether the area can do anything when activated, after applying new attributes to area.

Returns
  Whether area can do anything when activated.

## ◆ is_focus_sibling()

bool Gtk::CellArea::is_focus_sibling | ( | CellRenderer & | renderer,
|  | CellRenderer & | sibling
| ) |  |

Returns whether sibling is one of renderer’s focus siblings (see add_focus_sibling()).

Parameters

  renderer | The `Gtk::CellRenderer` expected to have focus.
  sibling | The `Gtk::CellRenderer` to check against renderer’s sibling list.

Returns
  `true` if sibling is a focus sibling of renderer.

## ◆ on_apply_attributes()

virtual void Gtk::CellArea::on_apply_attributes | ( | const Glib::RefPtr< TreeModel > & | tree_model,
|  | const TreeModel::iterator & | iter,
|  | bool | is_expander,
|  | bool | is_expanded
| ) |  |
| protected virtual

This is a default handler for the signal signal_apply_attributes().

## ◆ operator=()

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

## ◆ property_edit_widget()

Glib::PropertyProxy_ReadOnly< CellEditable* > Gtk::CellArea::property_edit_widget | ( |  | ) | const
| protected

The widget currently editing the edited cell.

This property is read-only and only changes as a result of a call Gtk::CellArea::activate_cell().

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_edited_cell()

Glib::PropertyProxy_ReadOnly< CellRenderer* > Gtk::CellArea::property_edited_cell | ( |  | ) | const
| protected

The cell in the area that is currently edited.

This property is read-only and only changes as a result of a call Gtk::CellArea::activate_cell().

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_focus_cell() [1/2]

Glib::PropertyProxy< CellRenderer* > Gtk::CellArea::property_focus_cell | ( |  | ) |
| protected

The cell in the area that currently has focus.

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_focus_cell() [2/2]

Glib::PropertyProxy_ReadOnly< CellRenderer* > Gtk::CellArea::property_focus_cell | ( |  | ) | const
| protected

The cell in the area that currently has focus.

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()

void Gtk::CellArea::remove | ( | CellRenderer & | renderer | ) |

Removes renderer from area.

Parameters

  renderer | The `Gtk::CellRenderer` to remove from area.

## ◆ remove_focus_sibling()

void Gtk::CellArea::remove_focus_sibling | ( | CellRenderer & | renderer,
|  | CellRenderer & | sibling
| ) |  |

Removes sibling from renderer’s focus sibling list (see add_focus_sibling()).

Parameters

  renderer | The `Gtk::CellRenderer` expected to have focus.
  sibling | The `Gtk::CellRenderer` to remove from renderer’s focus area.

## ◆ request_renderer()

void Gtk::CellArea::request_renderer | ( | CellRenderer & | renderer,
|  | Orientation | orientation,
|  | Widget & | widget,
|  | int | for_size,
|  | int & | minimum_size,
|  | int & | natural_size
| ) |  |

This is a convenience function for `Gtk::CellArea` implementations to request size for cell renderers.

It’s important to use this function to request size and then use inner_cell_area() at render and event time since this function will add padding around the cell for focus painting.

Parameters

  renderer | The `Gtk::CellRenderer` to request size for.
  orientation | The `Gtk::Orientation` in which to request size.
  widget | The `Gtk::Widget` that area is rendering onto.
  for_size | The allocation contextual size to request for, or -1 if the base request for the orientation is to be returned.
  minimum_size | Location to store the minimum size.
  natural_size | Location to store the natural size.

## ◆ set_focus_cell()

void Gtk::CellArea::set_focus_cell | ( | CellRenderer & | renderer | ) |

Explicitly sets the currently focused cell to renderer.

This is generally called by implementations of `GtkCellAreaClass.focus()` or `GtkCellAreaClass.event()`, however it can also be used to implement functions such as Gtk::TreeView::set_cursor_on_cell().

Parameters

  renderer | The `Gtk::CellRenderer` to give focus to.

## ◆ signal_add_editable()

Glib::SignalProxy<void(CellRenderer*, CellEditable*, const Gdk::Rectangle&, const Glib::ustring&)> Gtk::CellArea::signal_add_editable | ( |  | ) |
| protected

Slot Prototype:
  `void on_my_add_editable(CellRenderer* renderer, CellEditable* editable, const Gdk::Rectangle& cell_area, const Glib::ustring& path)`

Flags: Run First

Indicates that editing has started on renderer and that editable should be added to the owning cell-layouting widget at cell_area.

Parameters

  renderer | The `Gtk::CellRenderer` that started the edited.
  editable | The `Gtk::CellEditable` widget to add.
  cell_area | The `Gtk::Widget` relative `Gdk::Rectangle` coordinates where editable should be added.
  path | The `Gtk::TreePath` string this edit was initiated for.

## ◆ signal_apply_attributes()

Glib::SignalProxy<void(const Glib::RefPtr<TreeModel>&, const TreeModel::iterator&, bool, bool)> Gtk::CellArea::signal_apply_attributes | ( |  | ) |
| protected

Slot Prototype:
  `void on_my_apply_attributes(const Glib::RefPtr<TreeModel>& tree_model, const TreeModel::iterator& iter, bool is_expander, bool is_expanded)`

Flags: Run First

This signal is emitted whenever applying attributes to area from tree_model

Parameters

  tree_model | The `Gtk::TreeModel` to apply the attributes from.
  iter | The `Gtk::TreeIter` indicating which row to apply the attributes of.
  is_expander | Whether the view shows children for this row.
  is_expanded | Whether the view is currently showing the children of this row.

## ◆ signal_focus_changed()

Glib::SignalProxy<void(CellRenderer*, const Glib::ustring&)> Gtk::CellArea::signal_focus_changed | ( |  | ) |
| protected

Slot Prototype:
  `void on_my_focus_changed(CellRenderer* renderer, const Glib::ustring& path)`

Flags: Run First

Indicates that focus changed on this area. This signal is emitted either as a result of focus handling or event handling.

It's possible that the signal is emitted even if the currently focused renderer did not change, this is because focus may change to the same renderer in the same cell area for a different row of data.

Parameters

  renderer | The `Gtk::CellRenderer` that has focus.
  path | The current `Gtk::TreePath` string set for area.

## ◆ signal_remove_editable()

Glib::SignalProxy<void(CellRenderer*, CellEditable*)> Gtk::CellArea::signal_remove_editable | ( |  | ) |
| protected

Slot Prototype:
  `void on_my_remove_editable(CellRenderer* renderer, CellEditable* editable)`

Flags: Run First

Indicates that editing finished on renderer and that editable should be removed from the owning cell-layouting widget.

Parameters

  renderer | The `Gtk::CellRenderer` that finished editeding.
  editable | The `Gtk::CellEditable` widget to remove.

## ◆ snapshot()

void Gtk::CellArea::snapshot | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | const Glib::RefPtr< Gtk::Snapshot > & | snapshot,
|  | const Gdk::Rectangle & | background_area,
|  | const Gdk::Rectangle & | cell_area,
|  | CellRendererState | flags,
|  | bool | paint_focus
| ) |  |

Snapshots area’s cells according to area’s layout onto at the given coordinates.

Parameters

  context | The `Gtk::CellArea`Context for this row of data.
  widget | The `Gtk::Widget` that area is rendering to.
  snapshot | The `Gtk::Snapshot` to draw to.
  background_area | The widget relative coordinates for area’s background.
  cell_area | The widget relative coordinates for area.
  flags | The `Gtk::CellRenderer`State for area in this row.
  paint_focus | Whether area should paint focus on focused cells for focused rows or not.

## ◆ snapshot_vfunc()

virtual void Gtk::CellArea::snapshot_vfunc | ( | const Glib::RefPtr< CellAreaContext > & | context,
|  | Widget & | widget,
|  | const Glib::RefPtr< Gtk::Snapshot > & | snapshot,
|  | const Gdk::Rectangle & | background_area,
|  | const Gdk::Rectangle & | cell_area,
|  | CellRendererState | flags,
|  | bool | paint_focus
| ) |  |
| protected virtual

## ◆ stop_editing()

void Gtk::CellArea::stop_editing | ( | bool | canceled | ) |

Explicitly stops the editing of the currently edited cell.

If canceled is `true`, the currently edited cell renderer will emit the signal_editing_canceled() signal, otherwise the the signal_editing_done() signal will be emitted on the current edit widget.

See get_edited_cell() and get_edit_widget().

Parameters

  canceled | Whether editing was canceled.

## Friends And Related Function Documentation

## ◆ wrap()

Glib::RefPtr< Gtk::CellArea > wrap | ( | GtkCellArea * | 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.