class: CellArea

[174:7] extends: object

An abstract class for laying out GtkCellRenderers The GtkCellArea is an abstract class for [iface@Gtk.CellLayout] widgets (also referred to as "layouting widgets") to interface with an arbitrary number of [class@Gtk.CellRenderer]s and interact with the user for a given [iface@Gtk.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 GtkCellArea directly unless they are implementing a cell-layouting widget themselves. ## Requesting area sizes As outlined in GtkWidget’s geometry management section, GTK uses a height-for-width geometry management system to compute the sizes of widgets and user interfaces. GtkCellArea uses the same semantics to calculate the size of an area for an arbitrary number of GtkTreeModel 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 [class@Gtk.TreeViewColumn] always lines up the areas from top to bottom while a [class@Gtk.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 GtkCellArea uses a [class@Gtk.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 [class@Gtk.CellAreaContext] is an opaque object specific to the GtkCellArea which created it (see [method@Gtk.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 [class@Gtk.CellAreaContext] which was used to request the sizes for a given GtkTreeModel row be used when rendering or processing events for that row. In order to request the width of all the rows at the root level of a GtkTreeModel one would do the following: c GtkTreeIter iter; int minimum_width; int natural_width; valid = gtk_tree_model_get_iter_first (model, &iter); while (valid) { gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE); gtk_cell_area_get_preferred_width (area, context, widget, NULL, NULL); valid = gtk_tree_model_iter_next (model, &iter); } gtk_cell_area_context_get_preferred_width (context, &minimum_width, &natural_width); Note that in this example it’s not important to observe the returned minimum and natural width of the area for each row unless the cell-layouting object is actually interested in the widths of individual rows. The overall width is however stored in the accompanying GtkCellAreaContext object and can be consulted at any time. This can be useful since GtkCellLayout widgets usually have to support requesting and rendering rows in treemodels with an exceedingly large amount of rows. The GtkCellLayout widget in that case would calculate the required width of the rows in an idle or timeout source (see [func@GLib.timeout_add]) and when the widget is requested its actual width in [vfunc@Gtk.Widget.measure] it can simply consult the width accumulated so far in the GtkCellAreaContext object. A simple example where rows are rendered from top to bottom and take up the full width of the layouting widget would look like: c static void foo_get_preferred_width (GtkWidget *widget, int *minimum_size, int *natural_size) { Foo *self = FOO (widget); FooPrivate *priv = foo_get_instance_private (self); foo_ensure_at_least_one_handfull_of_rows_have_been_requested (self); gtk_cell_area_context_get_preferred_width (priv->context, minimum_size, natural_size); } In the above example the Foo widget has to make sure that some row sizes have been calculated (the amount of rows that Foo judged was appropriate to request space for in a single timeout iteration) before simply returning the amount of space required by the area via the GtkCellAreaContext. Requesting the height for width (or width for height) of an area is a similar task except in this case the GtkCellAreaContext does not store the data (actually, it does not know how much space the layouting widget plans to allocate it for every row. It’s up to the layouting widget to render each row of data with the appropriate height and width which was requested by the GtkCellArea). In order to request the height for width of all the rows at the root level of a GtkTreeModel one would do the following: c GtkTreeIter iter; int minimum_height; int natural_height; int full_minimum_height = 0; int full_natural_height = 0; valid = gtk_tree_model_get_iter_first (model, &iter); while (valid) { gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE); gtk_cell_area_get_preferred_height_for_width (area, context, widget, width, &minimum_height, &natural_height); if (width_is_for_allocation) cache_row_height (&iter, minimum_height, natural_height); full_minimum_height += minimum_height; full_natural_height += natural_height; valid = gtk_tree_model_iter_next (model, &iter); } Note that in the above example we would need to cache the heights returned for each row so that we would know what sizes to render the areas for each row. However we would only want to really cache the heights if the request is intended for the layouting widgets real allocation. In some cases the layouting widget is requested the height for an arbitrary for_width, this is a special case for layouting widgets who need to request size for tens of thousands of rows. For this case it’s only important that the layouting widget calculate one reasonably sized chunk of rows and return that height synchronously. The reasoning here is that any layouting widget is at least capable of synchronously calculating enough height to fill the screen height (or scrolled window height) in response to a single call to [vfunc@Gtk.Widget.measure]. Returning a perfect height for width that is larger than the screen area is inconsequential since after the layouting receives an allocation from a scrolled window it simply continues to drive the scrollbar values while more and more height is required for the row heights that are calculated in the background. ## Rendering Areas Once area sizes have been acquired at least for the rows in the visible area of the layouting widget they can be rendered at [vfunc@Gtk.Widget.snapshot] time. A crude example of how to render all the rows at the root level runs as follows: c GtkAllocation allocation; GdkRectangle cell_area = { 0, }; GtkTreeIter iter; int minimum_width; int natural_width; gtk_widget_get_allocation (widget, &allocation); cell_area.width = allocation.width; valid = gtk_tree_model_get_iter_first (model, &iter); while (valid) { cell_area.height = get_cached_height_for_row (&iter); gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE); gtk_cell_area_render (area, context, widget, cr, &cell_area, &cell_area, state_flags, FALSE); cell_area.y += cell_area.height; valid = gtk_tree_model_iter_next (model, &iter); } Note that the cached height in this example really depends on how the layouting widget works. The layouting widget might decide to give every row its minimum or natural height or, if the model content is expected to fit inside the layouting widget without scrolling, it would make sense to calculate the allocation for each row at the time the widget is allocated using [func@Gtk.distribute_natural_allocation]. ## Handling Events and Driving Keyboard Focus Passing events to the area is as simple as handling events on any normal widget and then passing them to the [method@Gtk.CellArea.event] API as they come in. Usually GtkCellArea is only interested in button events, however some customized derived areas can be implemented who are interested in handling other events. Handling an event can trigger the [signal@Gtk.CellArea::focus-changed] signal to fire; as well as [signal@Gtk.CellArea::add-editable] in the case that an editable cell was clicked and needs to start editing. You can call [method@Gtk.CellArea.stop_editing] at any time to cancel any cell editing that is currently in progress. The GtkCellArea drives keyboard focus from cell to cell in a way similar to GtkWidget. For layouting widgets that support giving focus to cells it’s important to remember to pass GTK_CELL_RENDERER_FOCUSED to the area functions for the row that has focus and to tell the area to paint the focus at render time. Layouting widgets that accept focus on cells should implement the [vfunc@Gtk.Widget.focus] virtual method. The layouting widget is always responsible for knowing where GtkTreeModel rows are rendered inside the widget, so at [vfunc@Gtk.Widget.focus] time the layouting widget should use the GtkCellArea methods to navigate focus inside the area and then observe the [enum@Gtk.DirectionType] to pass the focus to adjacent rows and areas. A basic example of how the [vfunc@Gtk.Widget.focus] virtual method should be implemented: ``` static gboolean foo_focus (GtkWidget *widget, GtkDirectionType direction) { Foo *self = FOO (widget); FooPrivate *priv = foo_get_instance_private (self); int focus_row = priv->focus_row; gboolean have_focus = FALSE; if (!gtk_widget_has_focus (widget)) gtk_widget_grab_focus (widget); valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, priv->focus_row); while (valid) { gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE); if (gtk_cell_area_focus (priv->area, direction)) { priv->focus_row = focus_row; have_focus = TRUE; break; } else { if (direction == GTK_DIR_RIGHT || direction == GTK_DIR_LEFT) break; else if (direction == GTK_DIR_UP || direction == GTK_DIR_TAB_BACKWARD) { if (focus_row == 0) break; else { focus_row--; valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, focus_row); } } else { if (focus_row == last_row) break; else { focus_row++; valid = gtk_tree_model_iter_next (priv->model, &iter); } } } } return have_focus; }

`GtkDirectionType` values to the way it lays out its cells. ## Cell
Properties The `GtkCellArea` introduces cell properties for
`GtkCellRenderer`s. This provides some general interfaces for defining the
relationship cell areas have with their cells. For instance in a
[class@Gtk.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 `GtkCellAreaContext`. Use
[method@Gtk.CellAreaClass.install_cell_property] to install cell properties
for a cell area class and [method@Gtk.CellAreaClass.find_cell_property] or
[method@Gtk.CellAreaClass.list_cell_properties] to get information about
existing cell properties. To set the value of a cell property, use
[method@Gtk.CellArea.cell_set_property], [method@Gtk.CellArea.cell_set] or
[method@Gtk.CellArea.cell_set_valist]. To obtain the value of a cell
property, use [method@Gtk.CellArea.cell_get_property]
[method@Gtk.CellArea.cell_get] or [method@Gtk.CellArea.cell_get_valist].

#### Members
- **handleObj**
- **lib**
- **retainedCallbacks**
- **signalHandlerNames**
- **signalSetterHandlers**

#### Methods

- **CellArea** (`Handle = null`)

	> Creates a new `CellArea` by wrapping a native handle or another wrapper.

	- **@p** `Handle` is the native handle or another wrapper whose handle to adopt.


- **toNativeHandle** (`Source`)

	> Normalizes a constructor argument into a raw pointer carrier. Accepts a raw NativeHandle, a raw NativeBuffer returned from `fn.call(...)`, another generated wrapper exposing `handle()`, or null. Returns null when the argument carries no pointer.

	- **@p** `Source` is the raw handle, raw buffer, wrapper, or null.
	- **@r** `A` raw pointer carrier or null when no pointer is present.


- **getLib** ()

	> Returns the opened native library for this generated wrapper.

	- **@r** `The` opened native library.


- **handle** ()

	> Returns the wrapped NativeHandle.

	- **@r** `The` wrapped NativeHandle.


- **isNull** ()

	> Returns true when the wrapped handle is null.

	- **@r** `A` bool.


- **describe** ()

	> Returns a small string for debugging generated wrappers.

	- **@r** `A` string.


- **asInitiallyUnowned** ()

	> Wraps this handle as `InitiallyUnowned`.

	- **@r** `A` `InitiallyUnowned` object.


- **asBuildable** ()

	> Wraps this handle as `Buildable`.

	- **@r** `A` `Buildable` object.


- **asCellLayout** ()

	> Wraps this handle as `CellLayout`.

	- **@r** `A` `CellLayout` object.


- **connectSignal** (`string Name, CallbackObj`)

	> Connects one generated callback wrapper to a named signal.

	- **@p** `Name` is the signal name.
	- **@p** `CallbackObj` is the generated callback wrapper to connect.
	- **@r** `The` connected handler id.


- **disconnectSignalHandler** (`int HandlerId`)

	> Disconnects one retained signal handler id.

	- **@p** `HandlerId` is the signal handler id to disconnect.
	- **@r** `None.` 


- **setOnAddeditable** (`callback Fn, UserData = null`)

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

	- **@p** `Fn` is the Aussom callback.
	- **@p** `Fn` is called with (CellArea Self, CellRenderer Renderer, CellEditable Editable, object Cell_area, string Path).
	- **@p** `UserData` is retained and passed through to the generated callback wrapper when provided.
	- **@r** `The` connected handler id.


- **setOnApplyattributes** (`callback Fn, UserData = null`)

	> This signal is emitted whenever applying attributes to @area from @model

	- **@p** `Fn` is the Aussom callback.
	- **@p** `Fn` is called with (CellArea Self, TreeModel Model, object Iter, bool Is_expander, bool Is_expanded).
	- **@p** `UserData` is retained and passed through to the generated callback wrapper when provided.
	- **@r** `The` connected handler id.


- **setOnFocuschanged** (`callback Fn, UserData = null`)

	> 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.

	- **@p** `Fn` is the Aussom callback.
	- **@p** `Fn` is called with (CellArea Self, CellRenderer Renderer, string Path).
	- **@p** `UserData` is retained and passed through to the generated callback wrapper when provided.
	- **@r** `The` connected handler id.


- **setOnRemoveeditable** (`callback Fn, UserData = null`)

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

	- **@p** `Fn` is the Aussom callback.
	- **@p** `Fn` is called with (CellArea Self, CellRenderer Renderer, CellEditable Editable).
	- **@p** `UserData` is retained and passed through to the generated callback wrapper when provided.
	- **@r** `The` connected handler id.


- **getProperty** (`string Name`)

	> Reads one generated property by name.



- **setProperty** (`string Name, Value`)

	> Writes one generated property by name.



- **setFocuscell** (`object Value`)

	> The cell in the area that currently has focus

	- **@p** `Value` is the new property value.
	- **@r** `None.` 


- **activate** (`object context, object widget, cell_area, string 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.

	- **@p** `context` is the `GtkCellArea`Context in context with the current row data.
	- **@p** `widget` is the `GtkWidget` that @area is rendering on.
	- **@p** `cell_area` is the size and location of @area relative to @widget’s allocation.
	- **@p** `flags` is the `GtkCellRenderer`State flags for @area for this row of data..
	- **@p** `edit_only` is if %TRUE then only cell renderers that are %GTK_CELL_RENDERER_MODE_EDITABLE will be activated..


- **activate\_cell** (`object widget, object renderer, object event, cell_area, string flags`)

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

	- **@p** `widget` is the `GtkWidget` that @area is rendering onto.
	- **@p** `renderer` is the `GtkCellRenderer` in @area to activate.
	- **@p** `event` is the `GdkEvent` for which cell activation should occur.
	- **@p** `cell_area` is the `GdkRectangle` in @widget relative coordinates of
	- **@renderer** `for` the current row..
	- **@p** `flags` is the `GtkCellRenderer`State for @renderer.


- **add** (`object renderer`)

	> Adds @renderer to @area with the default child cell properties.

	- **@p** `renderer` is the `GtkCellRenderer` to add to @area.
	- **@r** `None.` 


- **add\_focus\_sibling** (`object renderer, object 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.** `` 
	- **@p** `renderer` is the `GtkCellRenderer` expected to have focus.
	- **@p** `sibling` is the `GtkCellRenderer` to add to @renderer’s focus area.
	- **@r** `None.` 


- **apply\_attributes** (`object tree_model, iter, bool is_expander, bool is_expanded`)

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

	- **@p** `tree_model` is the `GtkTreeModel` to pull values from.
	- **@p** `iter` is the `GtkTreeIter` in @tree_model to apply values for.
	- **@p** `is_expander` is whether @iter has children.
	- **@p** `is_expanded` is whether @iter is expanded in the view and children are visible.
	- **@r** `None.` 


- **attribute\_connect** (`object renderer, string attribute, int column`)

	> Connects an @attribute to apply values from @column for the `GtkTreeModel` in use.

	- **@p** `renderer` is the `GtkCellRenderer` to connect an attribute for.
	- **@p** `attribute` is the attribute name.
	- **@p** `column` is the `GtkTreeModel` column to fetch attribute values from.
	- **@r** `None.` 


- **attribute\_disconnect** (`object renderer, string attribute`)

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

	- **@p** `renderer` is the `GtkCellRenderer` to disconnect an attribute for.
	- **@p** `attribute` is the attribute name.
	- **@r** `None.` 


- **attribute\_get\_column** (`object renderer, string attribute`)

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

	- **@p** `renderer` is a `GtkCellRenderer`.
	- **@p** `attribute` is an attribute on the renderer.


- **cell\_get\_property** (`object renderer, string property_name, object value`)

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

	- **@p** `renderer` is a `GtkCellRenderer` inside @area.
	- **@p** `property_name` is the name of the property to get.
	- **@p** `value` is a location to return the value.
	- **@r** `None.` 


- **cell\_set\_property** (`object renderer, string property_name, object value`)

	> Sets a cell property for @renderer in @area.

	- **@p** `renderer` is a `GtkCellRenderer` inside @area.
	- **@p** `property_name` is the name of the cell property to set.
	- **@p** `value` is the value to set the cell property to.
	- **@r** `None.` 


- **copy\_context** (`object 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, `GtkIconView` 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. `GtkIconView` 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.

	- **@p** `context` is the `GtkCellArea`Context to copy.


- **create\_context** ()

	> Creates a `GtkCellArea`Context to be used with @area for all purposes. `GtkCellArea`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 `GtkCellArea`Context which was used to request the size of those rows of data).



- **event** (`object context, object widget, object event, cell_area, string flags`)

	> Delegates event handling to a `GtkCellArea`.

	- **@p** `context` is the `GtkCellArea`Context for this row of data..
	- **@p** `widget` is the `GtkWidget` that @area is rendering to.
	- **@p** `event` is the `GdkEvent` to handle.
	- **@p** `cell_area` is the @widget relative coordinates for @area.
	- **@p** `flags` is the `GtkCellRenderer`State for @area in this row..


- **focus** (`string 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 `GtkCellArea` classes should implement this method to receive and navigate focus in its own way particular to how it lays out cells.

	- **@p** `direction` is the `GtkDirectionType`.


- **get\_current\_path\_string** ()

	> Gets the current `GtkTreePath` string for the currently applied `GtkTreeIter`, this is implicitly updated when gtk_cell_area_apply_attributes() is called and can be used to interact with renderers from `GtkCellArea` subclasses.



- **get\_edit\_widget** ()

	> Gets the `GtkCellEditable` widget currently used to edit the currently edited cell.



- **get\_edited\_cell** ()

	> Gets the `GtkCellRenderer` in @area that is currently being edited.



- **get\_focus\_cell** ()

	> Retrieves the currently focused cell for @area



- **get\_focus\_from\_sibling** (`object renderer`)

	> Gets the `GtkCellRenderer` which is expected to be focusable for which

	- **@renderer** `is,` or may be a sibling. This is handy for `GtkCellArea` 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.
	- **@p** `renderer` is the `GtkCellRenderer`.


- **get\_focus\_siblings** (`object renderer`)

	> Gets the focus sibling cell renderers for @renderer.

	- **@p** `renderer` is the `GtkCellRenderer` expected to have focus.


- **get\_request\_mode** ()

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



- **has\_renderer** (`object renderer`)

	> Checks if @area contains @renderer.

	- **@p** `renderer` is the `GtkCellRenderer` to check.


- **is\_activatable** ()

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



- **is\_focus\_sibling** (`object renderer, object sibling`)

	> Returns whether @sibling is one of @renderer’s focus siblings (see gtk_cell_area_add_focus_sibling()).

	- **@p** `renderer` is the `GtkCellRenderer` expected to have focus.
	- **@p** `sibling` is the `GtkCellRenderer` to check against @renderer’s sibling list.


- **remove** (`object renderer`)

	> Removes @renderer from @area.

	- **@p** `renderer` is the `GtkCellRenderer` to remove from @area.
	- **@r** `None.` 


- **remove\_focus\_sibling** (`object renderer, object sibling`)

	> Removes @sibling from @renderer’s focus sibling list (see gtk_cell_area_add_focus_sibling()).

	- **@p** `renderer` is the `GtkCellRenderer` expected to have focus.
	- **@p** `sibling` is the `GtkCellRenderer` to remove from @renderer’s focus area.
	- **@r** `None.` 


- **set\_focus\_cell** (`object 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_tree_view_set_cursor_on_cell().

	- **@p** `renderer` is the `GtkCellRenderer` to give focus to.
	- **@r** `None.` 


- **snapshot** (`object context, object widget, object snapshot, background_area, cell_area, string flags, bool paint_focus`)

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

	- **@p** `context` is the `GtkCellArea`Context for this row of data..
	- **@p** `widget` is the `GtkWidget` that @area is rendering to.
	- **@p** `snapshot` is the `GtkSnapshot` to draw to.
	- **@p** `background_area` is the @widget relative coordinates for @area’s background.
	- **@p** `cell_area` is the @widget relative coordinates for @area.
	- **@p** `flags` is the `GtkCellRenderer`State for @area in this row..
	- **@p** `paint_focus` is whether @area should paint focus on focused cells for focused rows or not..
	- **@r** `None.` 


- **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 ::editing-canceled signal, otherwise the the ::editing-done signal will be emitted on the current edit widget. See gtk_cell_area_get_edited_cell() and gtk_cell_area_get_edit_widget().

	- **@p** `canceled` is whether editing was canceled..
	- **@r** `None.` 


- **focus\_siblings** ()

	> Returns `get_focus_siblings` as an Aussom list of wrapper objects. This companion method materializes the full collection up front; use `get_focus_siblings()` when lazy or change-notify access is required.

	- **@r** `An` Aussom list of elements.




## class: CellAreaRemoveeditableCallback

[1052:7] **extends: object** 

Generated low-level callback wrapper for GIR callback `remove-editable`.

#### Members
- **callbackObj**
- **userFn**
- **userData**
- **hasUserData**

#### Methods

- **CellAreaRemoveeditableCallback** (`callback Fn, UserData = null`)

	> Creates one native callback wrapper. The wrapper owns a trampoline that converts native pointers into generated wrapper objects before invoking `Fn`.

	- **@p** `Fn` is the Aussom callback implementation.
	- **@p** `UserData` is retained and passed through to Fn on each invocation when provided.


- **trampoline** (`nativeSelf, renderer, editable, nativeUserData`)

	> Internal trampoline. Converts native pointer arguments into generated wrapper instances, then invokes the user's callback.



- **callback** ()

	> Returns the wrapped NativeCallback.



- **handle** ()

	> Returns the callback as a NativeHandle.



- **close** ()

	> Closes the underlying NativeCallback.



- **isClosed** ()

	> Returns true when the callback has been closed.





## class: CellAreaMeta

[1124:14] `static` **extends: object** 

Generated metadata helpers for `CellArea` class surfaces.

#### Methods

- **properties** ()

	> Returns property metadata for `CellArea`.

	- **@r** `A` list.


- **signals** ()

	> Returns signal metadata for `CellArea`.

	- **@r** `A` list.




## class: CellAreaAddeditableCallback

[836:7] **extends: object** 

Generated low-level callback wrapper for GIR callback `add-editable`.

#### Members
- **callbackObj**
- **userFn**
- **userData**
- **hasUserData**

#### Methods

- **CellAreaAddeditableCallback** (`callback Fn, UserData = null`)

	> Creates one native callback wrapper. The wrapper owns a trampoline that converts native pointers into generated wrapper objects before invoking `Fn`.

	- **@p** `Fn` is the Aussom callback implementation.
	- **@p** `UserData` is retained and passed through to Fn on each invocation when provided.


- **trampoline** (`nativeSelf, renderer, editable, cell_area, path, nativeUserData`)

	> Internal trampoline. Converts native pointer arguments into generated wrapper instances, then invokes the user's callback.



- **callback** ()

	> Returns the wrapped NativeCallback.



- **handle** ()

	> Returns the callback as a NativeHandle.



- **close** ()

	> Closes the underlying NativeCallback.



- **isClosed** ()

	> Returns true when the callback has been closed.





## class: CellAreaApplyattributesCallback

[908:7] **extends: object** 

Generated low-level callback wrapper for GIR callback `apply-attributes`.

#### Members
- **callbackObj**
- **userFn**
- **userData**
- **hasUserData**

#### Methods

- **CellAreaApplyattributesCallback** (`callback Fn, UserData = null`)

	> Creates one native callback wrapper. The wrapper owns a trampoline that converts native pointers into generated wrapper objects before invoking `Fn`.

	- **@p** `Fn` is the Aussom callback implementation.
	- **@p** `UserData` is retained and passed through to Fn on each invocation when provided.


- **trampoline** (`nativeSelf, model, iter, is_expander, is_expanded, nativeUserData`)

	> Internal trampoline. Converts native pointer arguments into generated wrapper instances, then invokes the user's callback.



- **callback** ()

	> Returns the wrapped NativeCallback.



- **handle** ()

	> Returns the callback as a NativeHandle.



- **close** ()

	> Closes the underlying NativeCallback.



- **isClosed** ()

	> Returns true when the callback has been closed.





## class: CellAreaFocuschangedCallback

[981:7] **extends: object** 

Generated low-level callback wrapper for GIR callback `focus-changed`.

#### Members
- **callbackObj**
- **userFn**
- **userData**
- **hasUserData**

#### Methods

- **CellAreaFocuschangedCallback** (`callback Fn, UserData = null`)

	> Creates one native callback wrapper. The wrapper owns a trampoline that converts native pointers into generated wrapper objects before invoking `Fn`.

	- **@p** `Fn` is the Aussom callback implementation.
	- **@p** `UserData` is retained and passed through to Fn on each invocation when provided.


- **trampoline** (`nativeSelf, renderer, path, nativeUserData`)

	> Internal trampoline. Converts native pointer arguments into generated wrapper instances, then invokes the user's callback.



- **callback** ()

	> Returns the wrapped NativeCallback.



- **handle** ()

	> Returns the callback as a NativeHandle.



- **close** ()

	> Closes the underlying NativeCallback.



- **isClosed** ()

	> Returns true when the callback has been closed.