Re: Finding which row is selected in a CList

[Peter Zelezny <zed linux com>]

On Thu, 23 May 2002 10:52:13 +0100
martyn 2 russell bt com wrote:

> The two most common ways of doing it are:
>
> 1, (Jean-Christophe Berthon's Code submitted earlier this week)
>
>  gint SelectedRowRank;
>
>  for (i = 0; i < g_list_length((GTK_CLIST(myCList))->selection); i++)
>  {
>   /* This is to get the row rank (or index) in the Clist */
>   SelectedRowRank =
> GPOINTER_TO_INT(g_list_nth_data((GTK_CLIST(myCList))->selection, i));
>
>   /* Now you can use it to access the text field, or whatever you'd like */
>   gtk_clist_get_text(GTK_CLIST(myCList), SelectedRowRank, Column,
> &pcTextField);
>   g_print("Field = %s", pcTextField);
>  }
>
> OR 
>
> 2, (the way I sometimes do it)
>
>   gint index = -1;
>   gint count = GTK_CLIST(myclist)->rows;
>  
>   GList *list = NULL;
>  
>   for(index=0;index<count;index++)
>     {
>       list = g_list_nth(GTK_CLIST(myclist)->row_list, index);
>       
>       if(GTK_CLIST_ROW(list)->state == GTK_STATE_SELECTED)
>       {
>          ...
>       }
>     }
>
> Regards,
>
> Martyn

Both routines are O(n^2) complexity. You could really improve the
first one by remembering the g_list_length, rather than measuring it
each time. The second one could be improved by using list=list->next
rather than g_list_nth. It could really make a difference on lists
above a few 100 rows.

-- 
Peter Zelezny.