gtkTreeViewSetColumnDragFunction    package:RGtk2    R Documentation

_g_t_k_T_r_e_e_V_i_e_w_S_e_t_C_o_l_u_m_n_D_r_a_g_F_u_n_c_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     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.

_U_s_a_g_e:

     gtkTreeViewSetColumnDragFunction(object, func, user.data = NULL)

_A_r_g_u_m_e_n_t_s:

'object': ['GtkTreeView']  A 'GtkTreeView'.

  'func': ['GtkTreeViewColumnDropFunc']  A function to determine which
          columns are reorderable, or 'NULL'.

'user.data': [R object]  User data to be passed to 'func', or 'NULL'

_A_u_t_h_o_r(_s):

     Derived by RGtkGen from GTK+ documentation

