Fills the bounding rectangle in widget coordinates for the cell specified by path and cell.
If cell is null the main cell area is used.
This function is only valid if this is realized.
| this |
a `GtkIconView` |
| path |
a `GtkTreePath` |
| cell |
a `GtkCellRenderer` |
| rect |
rectangle to fill with cell rect |
|
false if there is no such item, true otherwise |