Fills the bounding rectangle in bin_window coordinates for the cell at the row specified by path and the column specified by
column.
If path is null, or points to a node not found in the tree, the y and
height fields of the rectangle will be filled with 0. If column is null, the
x and width fields will be filled with 0. The returned rectangle is equivalent to the background_area
passed to gtk_cell_renderer_render. These background areas tile to cover the entire bin window. Contrast with the
cell_area, returned by get_cell_area, which returns only the
cell itself, excluding surrounding borders and the tree expander area.
| this |
a `GtkTreeView` |
| path |
a `GtkTreePath` for the row, or null to get only horizontal coordinates |
| column |
a `GtkTreeViewColumn` for the column, or null to get only vertical coordinates |
| rect |
rectangle to fill with cell background rect |