Re: DND in TreeView

[Murray Cumming <murrayc murrayc com>]

On Tue, 2009-03-31 at 08:37 +0800, Deng Xiyue wrote:
> On Mon, Mar 30, 2009 at 10:06:41AM -0400, Paul Davis wrote:
> > On Sat, Mar 28, 2009 at 11:08 PM, Deng Xiyue <manphiz gmail com> wrote:
> > >
> > >
> > > OTOH, the docs is not quite clear about how to handle DND in TreeView,
> > > and I supposed such operation is quite common which merits an example.
> > > The existing DND examples in TreeView is about how to use TreeView as a
> > > general DND source or destination, which doesn't cover the case of DND
> > > of rows within the TreeView. I'll try to provide one for review and file
> > > a enhancement bug against gtkmm-documentation when time permits.
> > 
> > i also have no time for code review, but i do have an app that uses
> > in-treeview DnD and works. however, we do it simply by allowing the
> > treeview code to handle DnD itself, and then we handle the
> > "rows-reordered" signal and work from there.
> > 
> 
> It is very appreciated to see an example program if you find some spare
> time to kill and prepare one :-)

I also do in-treeview row DnD in Glom, but I don't remember anything
about a "delete" signal. I do derive a TreeModel (but just from
TreeStore) to override some vfuncs so I can say what may be dragged
where.

The code is cluttered with other things, but this might be a starting
point if you want to look:
http://svn.gnome.org/viewvc/glom/trunk/glom/mode_data/treestore_layout.h?view=markup
http://svn.gnome.org/viewvc/glom/trunk/glom/mode_data/dialog_layout_details.cc?view=markup

> > i also have DnD from treeviews to other widgets working, but this is
> > very application specific.
> 
> Ditto, if the idea is not covered by the doc.

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