src/cx/fbn/nevernote/filters/NoteSortFilterProxyModel.java

   1 /*\r
   2  * This file is part of NixNote \r
   3  * Copyright 2009 Randy Baumgarte\r
   4  * \r
   5  * This file may be licensed under the terms of of the\r
   6  * GNU General Public License Version 2 (the ``GPL'').\r
   7  *\r
   8  * Software distributed under the License is distributed\r
   9  * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either\r
  10  * express or implied. See the GPL for the specific language\r
  11  * governing rights and limitations.\r
  12  *\r
  13  * You should have received a copy of the GPL along with this\r
  14  * program. If not, go to http://www.gnu.org/licenses/gpl.html\r
  15  * or write to the Free Software Foundation, Inc.,\r
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\r
  17  *\r
  18 */\r
  19 \r
  20 package cx.fbn.nevernote.filters;\r
  21 \r
  22 import java.util.TreeSet;\r
  23 \r
  24 import com.trolltech.qt.core.QAbstractItemModel;\r
  25 import com.trolltech.qt.core.QModelIndex;\r
  26 import com.trolltech.qt.core.QObject;\r
  27 import com.trolltech.qt.core.Qt;\r
  28 import com.trolltech.qt.gui.QIcon;\r
  29 import com.trolltech.qt.gui.QImage;\r
  30 import com.trolltech.qt.gui.QSortFilterProxyModel;\r
  31 \r
  32 import cx.fbn.nevernote.Global;\r
  33 \r
  34 public class NoteSortFilterProxyModel extends QSortFilterProxyModel {\r
  35         private final TreeSet<String> guids;\r
  36         public Signal2<Integer,Integer> sortChanged;\r
  37         public boolean blocked;\r
  38         \r
  39         public NoteSortFilterProxyModel(QObject parent) {\r
  40                 super(parent);\r
  41                 guids = new TreeSet<String>();\r
  42                 setDynamicSortFilter(true);\r
  43                 sortChanged = new Signal2<Integer,Integer>();\r
  44 //              logger = new ApplicationLogger("filter.log");\r
  45         }\r
  46         public void clear() {\r
  47                 guids.clear();\r
  48         }\r
  49         public void addGuid(String guid) {\r
  50 //              if (!guids.containsKey(guid))\r
  51                         guids.add(guid);\r
  52         }\r
  53         public void filter() {\r
  54                 invalidateFilter();\r
  55         }\r
  56         @Override\r
  57         protected boolean filterAcceptsRow(int sourceRow, QModelIndex sourceParent) {\r
  58                 if (guids.size() == 0)\r
  59                         return false;\r
  60                 QAbstractItemModel model = sourceModel();\r
  61                 QModelIndex guidIndex = sourceModel().index(sourceRow, Global.noteTableGuidPosition);\r
  62                 String guid = (String)model.data(guidIndex);\r
  63                 \r
  64                 if (guids.contains(guid))\r
  65                         return true;\r
  66                 else\r
  67                         return false;\r
  68         }\r
  69         \r
  70         \r
  71         @Override\r
  72         public void sort(int col, Qt.SortOrder order) {\r
  73                 if (col != Global.noteTableThumbnailPosition) {\r
  74                         if (!blocked)   {\r
  75                                 sortChanged.emit(col, order.value());    // Signal that the sort order has been modified\r
  76                         }\r
  77                         super.sort(col,order);\r
  78                 }\r
  79         }\r
  80         \r
  81         @Override\r
  82         protected boolean lessThan(QModelIndex left, QModelIndex right) {\r
  83                 Object leftData = sourceModel().data(left);\r
  84                 Object rightData = sourceModel().data(right);\r
  85                 \r
  86                 if (rightData == null)\r
  87                         return true;\r
  88                 if (leftData instanceof QIcon)\r
  89                         return true;\r
  90                 if (leftData instanceof QImage && rightData instanceof QImage)\r
  91                         return true;\r
  92                 if (leftData instanceof Long && rightData instanceof Long) {\r
  93                           Long leftLong = (Long)leftData;\r
  94                           Long rightLong = (Long)rightData;\r
  95                           return leftLong.compareTo(rightLong) < 0;            \r
  96                 }\r
  97                 if (leftData instanceof String && rightData instanceof String) {\r
  98                         String leftString = (String)leftData;\r
  99                         String rightString = (String)rightData;\r
 100                         return leftString.compareTo(rightString) < 0;\r
 101                 }\r
 102                 \r
 103                 return super.lessThan(left, right);\r
 104         }\r
 105 }