get_cell_allocation

Description:

public Rectangle get_cell_allocation (CellAreaContext context, Widget widget, CellRenderer renderer, Rectangle cell_area)

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

this	a `GtkCellArea`
context	the `GtkCellArea`Context used to hold sizes for this.
widget	the `GtkWidget` that this is rendering on
renderer	the `GtkCellRenderer` to get the allocation for
cell_area	the whole allocated area for this in `widget` for this row
allocation	where to store the allocation for `renderer`