Re: Enable drag and drop for treeview?

[Jef Driesen <jefdriesen hotmail com>]

Paul Davis wrote:
> On 5/2/07, Jef Driesen <jefdriesen hotmail com> wrote:
> > For my application, I want to be able to re-order rows in a treeview
> > (treestore model) using drag and drop. According to the gtkmm book, I
> > can use set_reorderable(). But how can I detect when a drag and drop
> > operation is finished (to update the underlying database)? I can't find
> > any signals to connect to. Am I missing something?
>
> I think to do this, you have to subclass Gtk::TreeModel and override
> Gtk::TreeDragDest::drag_data_received_vfunc()
>
> I did something similar here:
> http://trac.lsdcas.engineering.uiowa.edu/browser/trunk/cas2/plugins/viewer/event_analysis/treemodel.hh
> http://trac.lsdcas.engineering.uiowa.edu/browser/trunk/cas2/plugins/viewer/event_analysis/treemodel.cc
>
> There's also an example in the book about doing this stuff which is
> what I based my implementation on:
>
> http://www.gtkmm.org/docs/gtkmm-2.4/examples/book/treeview/drag_and_drop/

Does this method also work well with a sorted treemodel? Because the 
simple set_reorderable() does not seem to work in that case. Once the 
model is sorted (by clicking on a treeview column header), drag and drop 
is not possible anymore.