On Wed, Mar 25, 2009 at 02:18:04PM -0400, José Alburquerque wrote: > On Wed, 2009-03-25 at 13:02 +0800, Deng Xiyue wrote: > > So, with the given test program, what I'm experiencing is: > > > > 1. If I drag the last row in a TreeView to other place within the same > > TreeView, no delete signal is emitted, only insert signal got signaled. > > > > 2. If I drag any row (that is not the last row) to the last position, > > the insert signal always returns the path that evaluates to be row 0, > > which is the first row. That way, I cannot distinguish whether the row > > is dragged to the first row or the last row. Note that there are some > > assertion message when dragging to to last position. > > Okay. I think that what you're experiencing is a side effect of when > rows are inserted and deleted in the tree model (this can be very > tricky). I think that you should use the path in the signal handlers > instead of attempting to get an iterator to get the rows that have been > inserted/deleted. The patch I've attached exemplifies how to do that. > You'll probably have to make adjustment to the row numbers based on > whether an insertion or a deletion has taken place (I'm not sure). > > If you have to get an iterator, you should make sure you're working with > the right row because as the Gtk::Path[1] docs say, it is not guaranteed > that a path will always yield a vaild TreeModel::iterator. HTH. > > [1] > http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGtk_1_1TreePath.html > > > -- > José Alburquerque
Sorry again for the delay of my reply. Thanks a lot for the patch. It makes it clear that in both scenario the delete signal is indeed emitted, but yields an invalid iterator, so my code doesn't work. I also found I can use 'path[0]' to get an actual usable index, which should be enough for my current use case, but please do correct me if I'm still using a suboptimal way to achieve this. Thanks again. Regards, Deng Xiyue _______________________________________________ gtkmm-list mailing list gtkmm-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtkmm-list
