This is called when the layouting widget rendering the gtk.cell_area.CellArea activates the focus cell (see gtk.cell_area.CellArea.getFocusCell).
adds a gtk.cell_renderer.CellRenderer to the area.
Apply the cell attributes to the cells. This is implemented as a signal and generally gtk.cell_area.CellArea subclasses don't need to implement it since it is handled by the base class.
Creates a new gtk.cell_area_context.CellAreaContext in the same state as the passed @context with any cell alignment data and allocations intact.
Creates and returns a class specific gtk.cell_area_context.CellAreaContext to store cell alignment and allocation details for a said gtk.cell_area.CellArea class.
Handle an event in the area, this is generally used to activate a cell at the event location for button events but can also be used to generically pass events to gtk.widget.Widgets drawn onto the area.
This virtual method should be implemented to navigate focus from cell to cell inside the gtk.cell_area.CellArea. The gtk.cell_area.CellArea should move focus from cell to cell inside the area and return false if focus logically leaves the area with the following exceptions: When the area contains no activatable cells, the entire area receives focus. Focus should not be given to cells that are actually “focus siblings” of other sibling cells (see gtk.cell_area.CellArea.getFocusFromSibling). Focus is set by calling gtk.cell_area.CellArea.setFocusCell.
Calls the gtk.types.CellAllocCallback function on every gtk.cell_renderer.CellRenderer in the area with the allocated area for the cell and the provided user data until the callback returns true.
calls the gtk.types.CellCallback function on every gtk.cell_renderer.CellRenderer in the area with the provided user data until the callback returns true.
This should be implemented to report the values of child cell properties for a given child gtk.cell_renderer.CellRenderer.
Calculates the minimum and natural height of the areas cells with the current attributes applied. Essentially this is the same as GtkCellAreaClass.get_preferred_width() only for areas that are being requested as gtk.types.SizeRequestMode.WidthForHeight.
Calculates the minimum and natural height for the area if the passed @context would be allocated the given width. When implementing this virtual method it is safe to assume that @context has already stored the aligned cell widths for every gtk.tree_model.TreeModel row that @context will be allocated for since this information was stored at GtkCellAreaClass.get_preferred_width() time. This virtual method should also store any necessary alignments of cell heights for the case that the context is allocated a height.
Calculates the minimum and natural width of the areas cells with the current attributes applied while considering the particular layouting details of the said gtk.cell_area.CellArea. While requests are performed over a series of rows, alignments and overall minimum and natural sizes should be stored in the corresponding gtk.cell_area_context.CellAreaContext.
Calculates the minimum and natural width for the area if the passed @context would be allocated the given height. The same as GtkCellAreaClass.get_preferred_height_for_width() only for handling requests in the gtk.types.SizeRequestMode.WidthForHeight mode.
This allows an area to tell its layouting widget whether it prefers to be allocated in gtk.types.SizeRequestMode.HeightForWidth or gtk.types.SizeRequestMode.WidthForHeight mode.
Returns whether the gtk.cell_area.CellArea can respond to GtkCellAreaClass.activate(), usually this does not need to be implemented since the base class takes care of this however it can be enhanced if the gtk.cell_area.CellArea subclass can handle activation in other ways than activating its GtkCellRenderers.
removes a gtk.cell_renderer.CellRenderer from the area.
This should be implemented to handle changes in child cell properties for a given gtk.cell_renderer.CellRenderer that were previously installed on the gtk.cell_area_class.CellAreaClass with gtk.cell_area_class.CellAreaClass.installCellProperty.
Actually snapshot the area’s cells to the specified rectangle, @background_area should be correctly distributed to the cells corresponding background areas.