Main renderering method. Implementations should implement this method to
draw onto the cairo context. The background_area indicates total area of
the cell (without padding or margin) to be drawn. The cell_area indicates
the area where content can be drawn (text, images, etc).
The state argument indicates the current state of the renderer and should
be taken into account to properly draw the different possible states
(cursor, prelit, selected) if appropriate.
Main renderering method. Implementations should implement this method to draw onto the cairo context. The background_area indicates total area of the cell (without padding or margin) to be drawn. The cell_area indicates the area where content can be drawn (text, images, etc). The state argument indicates the current state of the renderer and should be taken into account to properly draw the different possible states (cursor, prelit, selected) if appropriate.