'RE: I can't figure out how to use Gtk::ListStore::move() and move a'

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List: gtkmm
Subject: RE: I can't figure out how to use Gtk::ListStore::move() and move a
From: sledge hammer <sledgehammer_999 () hotmail ! com>
Date: 2010-12-07 21:12:37
Message-ID: DUB102-w497D189DBDC2393507BEB6AB2C0 () phx ! gbl
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I forgot to say that "destination" is a private variable of my class of type \
"Gtk::TreeModel::Path";

From: sledgehammer_999@hotmail.com
To: gtkmm-list@gnome.org
Subject: I can't figure out how to use Gtk::ListStore::move() and move a row	to the \
                end...
Date: Tue, 7 Dec 2010 23:03:44 +0200

I am subclasssing Gtk::ListStore and overriding \
Gtk::TreeDragSource::drag_data_delete_vfunc and \
Gtk::TreeDragDest::drag_data_received_vfunc.  In these methods I use \
Gtk::ListStore::move instead of Gtk::ListStore::insert/Gtk::ListStore::delete. The \
reordering of the rows works fine if the dragged row is position on any position \
except one corner case.  If the row is dropped at the end of the TreeView \
Gtk::ListStore::move fails with this message " Gtk-CRITICAL **: \
gtk_list_store_move_before: assertion `VALID_ITER (position, store)' failed"

Here is my code for my two overriden methods:

bool CustomListStore::drag_data_delete_vfunc(const Gtk::TreeModel::Path& path)
{
  Gtk::TreeModel::iterator dest, source;
  dest = get_iter(destination);
  source = get_iter(path);
  move(source, dest);
  destination.clear();
  return true;
}

bool CustomListStore::drag_data_received_vfunc(const Gtk::TreeModel::Path& dest, \
const Gtk::SelectionData& selection_data) {
  destination = dest;
  return true;
}

received_vfunc always gets called before the delete_vfunc. Maybe, in my corner case, \
the  Gtk::TreeModel::Path returned in the received_vfunc is not correct? 

How should I proceed to solve my corner case?

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<font style="font-size: 12pt;" size="3">I forgot to say that </font><font \
style="font-size: 12pt;" size="3">"<font style="font-size: 8pt;" \
size="1">destination</font></font><font style="font-size: 12pt;" size="3">" is a \
private variable of my class of type "</font><font style="font-size: 12pt;" \
size="3"><font style="font-size: 8pt;" \
size="1">Gtk::TreeModel::Path</font>";</font><br><br><hr id="stopSpelling">From: \
sledgehammer_999@hotmail.com<br>To: gtkmm-list@gnome.org<br>Subject: I can't figure \
out how to use Gtk::ListStore::move() and move a row	to the end...<br>Date: Tue, 7 \
Dec 2010 23:03:44 +0200<br><br>

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I am subclasssing Gtk::ListStore and overriding Gtk::TreeDragSource::<a \
href="http://library.gnome.org/devel/gtkmm/unstable/classGtk_1_1TreeDragSource.html#a34849cb405c5a97999f749a59c08cda3" \
class="ecxel" target="_blank">drag_data_delete_vfunc</a> and Gtk::TreeDragDest::<a \
href="http://library.gnome.org/devel/gtkmm/unstable/classGtk_1_1TreeDragDest.html#a61b2d071896c38c9b79b457f1a140ba9" \
class="ecxel" target="_blank">drag_data_received_vfunc. </a> In these methods I \
use Gtk::ListStore::move instead of Gtk::ListStore::insert/Gtk::ListStore::delete. \
The reordering of the rows works fine if the dragged row is position on any position \
except one corner case.&nbsp; If the row is dropped at the end of the TreeView \
Gtk::ListStore::move fails with this message " Gtk-CRITICAL **: \
gtk_list_store_move_before: assertion `VALID_ITER (position, store)' \
failed" Here is my code for my two overriden methods: bool CustomListStore::drag_data_delete_vfunc(const \
Gtk::TreeModel::Path&amp; path) { &nbsp; Gtk::TreeModel::iterator dest, source; &nbsp; dest = \
get_iter(destination); &nbsp; source = get_iter(path); &nbsp; move(source, dest); &nbsp; \
destination.clear(); &nbsp; return true; } bool \
CustomListStore::drag_data_received_vfunc(const Gtk::TreeModel::Path&amp; dest, const \
Gtk::SelectionData&amp; selection_data) { &nbsp; destination = dest; &nbsp; return \
true; } received_vfunc always gets called before the \
delete_vfunc. Maybe, in my corner case, the \
Gtk::TreeModel::Path returned in the \
received_vfunc is not correct? How should I proceed to solve my \
corner case? 		 	 		 \
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