DnD: signal handler for signal_data_received not called

[Matthias Kaeppler <nospam digitalraid com>]

Hi,

what if I have a TreeView which is supposed to act both as a source and 
destination for drag and drop events? This treeview is embedded in a 
Gtk::ScrolledWindow (class DirBrowser).
I have connected three signal handlers, but only two are called. The 
signal handler which is supposed to be called when the destination 
receives the drop is never called.

    m_target_entries.push_back( Gtk::TargetEntry("STRING") );
    m_target_entries.push_back( Gtk::TargetEntry("text/plain") );

    m_view.drag_source_set(
	m_target_entries,
	Gdk::ModifierType( Gdk::BUTTON1_MASK | Gdk::BUTTON2_MASK ),
	Gdk::DragAction( Gdk::ACTION_COPY | Gdk::ACTION_MOVE | Gdk::ACTION_LINK )
	);
    m_view.drag_dest_set(
	m_target_entries,
	Gtk::DEST_DEFAULT_ALL,
	Gdk::DragAction( Gdk::ACTION_COPY | Gdk::ACTION_MOVE | Gdk::ACTION_LINK )
	);


    m_view.signal_drag_data_get()
	.connect( sigc::mem_fun( *this, &DirBrowser::on_drag_data_get ) );
    m_view.signal_drag_data_received()
	.connect( sigc::mem_fun( *this, &DirBrowser::on_drag_data_received ) );
    m_view.signal_button_press_event()
	.connect_notify( sigc::mem_fun( *this, &DirBrowser::on_button_clicked ) );

[...]

void DirBrowser::on_drag_begin( const Glib::RefPtr<Gdk::DragContext>& 
context )
{
    //Gtk::ScrolledWindow::on_drag_begin( context );
    std::cout << "dragging" << std::endl;
}

void DirBrowser::on_drag_data_get
( const Glib::RefPtr<Gdk::DragContext>&, const Gtk::SelectionData&, 
guint, guint )
{
    std::cout << "getting data" << std::endl;
}

void DirBrowser::on_drag_data_received
( const Glib::RefPtr<Gdk::DragContext>& context, int, int, const 
Gtk::SelectionData& data, guint, guint time )
{
    std::cout << "data received" << std::endl;
    context->drag_finish(false, false, time);
}


--
Matthias Kaeppler