set_column_types
Description:
Sets the types of the columns of a list store.
Note:
Use list models
This function is meant primarily for objects that inherit from `GtkListStore`, and should only be used when constructing a new instance.
This function cannot be called after a row has been added, or a method on the `GtkTreeModel` interface is called.
Parameters:
| this |
A `GtkListStore` |
| types |
An array length n of `GType`s |
| n_columns |
Number of columns for the list store |