Allow to sort peer list either by country or by IP

src/properties/peerlistsortmodel.h

@@ -0,0 +1,70 @@
+/*
+ * Bittorrent Client using Qt4 and libtorrent.
+ * Copyright (C) 2013  Nick Tiskov
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ *
+ * Contact : daymansmail@gmail.com
+ */
+
+#ifndef PEERLISTSORTMODEL_H
+#define PEERLISTSORTMODEL_H
+
+#include <QStringList>
+#include <QSortFilterProxyModel>
+#include "peerlistdelegate.h"
+
+class PeerListSortModel : public QSortFilterProxyModel {
+  Q_OBJECT
+
+public:
+  PeerListSortModel(QObject *parent = 0) : QSortFilterProxyModel(parent) {}
+
+protected:
+  bool lessThan(const QModelIndex &left, const QModelIndex &right) const {
+    if (sortColumn() == PeerListDelegate::IP) {
+      const QStringList ipLeft = sourceModel()->data(left).toString().split('.');
+      const QStringList ipRight = sourceModel()->data(right).toString().split('.');
+      if ((ipRight.size() & ipLeft.size()) != 4) // One row in model
+        return false;
+      Q_ASSERT(ipLeft.size() == 4);
+      Q_ASSERT(ipRight.size() == 4);
+
+      int i = 0;
+      while (i < 4) {
+        int l = ipLeft.at(i).toInt();
+        int r = ipRight.at(i).toInt();
+        if (l < r)
+          return true;
+        else if (l > r)
+          return false;
+        ++i;
+      }
+      return false;
+    }
+    return QSortFilterProxyModel::lessThan(left, right);
+  }
+};
+
+#endif // PEERLISTSORTMODEL_H