Method
GtkTreeViewset_column_drag_function
Declaration [src]
void
gtk_tree_view_set_column_drag_function (
GtkTreeView* tree_view,
GtkTreeViewColumnDropFunc func,
gpointer user_data,
GDestroyNotify destroy
)
Description [src]
Sets a user function for determining where a column may be dropped when
dragged. This function is called on every column pair in turn at the
beginning of a column drag to determine where a drop can take place. The
arguments passed to func
are: the tree_view
, the GtkTreeViewColumn
being
dragged, the two GtkTreeViewColumn
s determining the drop spot, and
user_data
. If either of the GtkTreeViewColumn
arguments for the drop spot
are NULL
, then they indicate an edge. If func
is set to be NULL
, then
tree_view
reverts to the default behavior of allowing all columns to be
dropped everywhere.
Parameters
func |
GtkTreeViewColumnDropFunc |
A function to determine which columns are reorderable. |
|
The argument can be NULL . | |
user_data |
gpointer |
User data to be passed to |
|
The argument can be NULL . | |
The data is owned by the caller of the function. | |
destroy |
GDestroyNotify |
Destroy notifier for |
|
The argument can be NULL . |