src/HEXABLOCKGUI/klinkitemselectionmodel.hxx

   1 /*
   2     Copyright (C) 2010 Klarälvdalens Datakonsult AB,
   3         a KDAB Group company, info@kdab.net,
   4         author Stephen Kelly <stephen@kdab.com>
   5
   6     This library is free software; you can redistribute it and/or modify it
   7     under the terms of the GNU Library General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or (at your
   9     option) any later version.
  10
  11     This library is distributed in the hope that it will be useful, but WITHOUT
  12     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
  14     License for more details.
  15
  16     You should have received a copy of the GNU Library General Public License
  17     along with this library; see the file COPYING.LIB.  If not, write to the
  18     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19     02110-1301, USA.
  20 */
  21
  22 #ifndef KLINKITEMSELECTIONMODEL_H
  23 #define KLINKITEMSELECTIONMODEL_H
  24
  25 #include <QtCore/QObject>
  26 #include <QtGui/QItemSelectionModel>
  27 #include <QtGui/QAbstractProxyModel>
  28
  29 #include <iostream>
  30
  31 // #include "kdeui_export.h"
  32 // #include "klinkitemselectionmodel_p.hxx"
  33
  34 #include "hexa_base.hxx"
  35 #include "kmodelindexproxymapper.hxx"
  36
  37 class KLinkItemSelectionModelPrivate;
  38
  39 class HexaExport KLinkItemSelectionModel : public QItemSelectionModel
  40 {
  41     Q_OBJECT
  42 public:
  43     KLinkItemSelectionModel(QAbstractItemModel *targetModel, QItemSelectionModel *linkedItemSelectionModel, QObject *parent = 0);
  44     ~KLinkItemSelectionModel();
  45     /* reimp */ void select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command);
  46     /* reimp */ void select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command);
  47
  48 protected:
  49     KLinkItemSelectionModelPrivate * const d_ptr;
  50
  51 private:
  52     Q_DECLARE_PRIVATE(KLinkItemSelectionModel)
  53     Q_PRIVATE_SLOT( d_func(), void sourceSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected))
  54
  55 };
  56
  57
  58 // QAbstractProxyModel::mapSelectionFromSource creates invalid ranges to we filter
  59 // those out manually in a loop. Hopefully fixed in Qt 4.7.2, so we ifdef it out.
  60 // http://qt.gitorious.org/qt/qt/merge_requests/2474
  61 // http://qt.gitorious.org/qt/qt/merge_requests/831
  62 #if QT_VERSION < 0x040702
  63 #define RANGE_FIX_HACK
  64 #endif
  65
  66 #ifdef RANGE_FIX_HACK
  67 static QItemSelection klink_removeInvalidRanges(const QItemSelection &selection)
  68 {
  69 //   std::cout<< " klink_removeInvalidRanges " << std::endl;
  70   QItemSelection result;
  71   Q_FOREACH(const QItemSelectionRange &range, selection)
  72   {
  73
  74 //    Q_FOREACH(const QModelIndex &i, range.indexes ())
  75 //    {
  76 ////       std::cout<< " =====> " << i.data().toString().toStdString() << std::endl;
  77 //    }
  78     if (!range.isValid())
  79       continue;
  80 //     std::cout<< " is VALID !!"<< std::endl;
  81     result << range;
  82   }
  83   return result;
  84 }
  85 #endif
  86
  87
  88 class KLinkItemSelectionModelPrivate
  89 {
  90 public:
  91     KLinkItemSelectionModelPrivate(KLinkItemSelectionModel *proxySelectionModel, QAbstractItemModel *model,
  92                                     QItemSelectionModel *linkedItemSelectionModel)
  93       : q_ptr(proxySelectionModel),
  94         m_model(model),
  95         m_linkedItemSelectionModel(linkedItemSelectionModel),
  96         m_ignoreCurrentChanged(false),
  97         m_indexMapper(new KModelIndexProxyMapper(model, linkedItemSelectionModel->model(), proxySelectionModel))
  98     {
  99     }
 100
 101     Q_DECLARE_PUBLIC(KLinkItemSelectionModel)
 102     KLinkItemSelectionModel * const q_ptr;
 103
 104
 105     bool assertSelectionValid(const QItemSelection &selection) const {
 106       foreach(const QItemSelectionRange &range, selection) {
 107 //         if (!range.isValid()) {
 108 //           kDebug() << selection;
 109 //         }
 110
 111         Q_ASSERT(range.isValid());
 112       }
 113       return true;
 114     }
 115
 116 void sourceSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
 117 {
 118
 119
 120     Q_Q(KLinkItemSelectionModel);
 121 #ifdef RANGE_FIX_HACK
 122 //     std::cout<<"XXXXXXXXXXXXX  sourceSelectionChanged!!!!!!!! RANGE_FIX_HACK"<<std::endl;
 123     QItemSelection _selected = klink_removeInvalidRanges(selected);
 124     QItemSelection _deselected = klink_removeInvalidRanges(deselected);
 125 #else
 126 //     std::cout<<"XXXXXXXXXXXXX  sourceSelectionChanged!!!!!!!! "<<std::endl;
 127     QItemSelection _selected = selected;
 128     QItemSelection _deselected = deselected;
 129 #endif
 130     Q_ASSERT(assertSelectionValid(_selected));
 131     Q_ASSERT(assertSelectionValid(_deselected));
 132
 133 //     std::cout << "XXXXXXXXXXXXX  _selected.count() "   << _selected.count() << std::endl;
 134 //     std::cout << "XXXXXXXXXXXXX  _deselected.count() " << _deselected.count() << std::endl;
 135
 136     const QItemSelection mappedDeselection = m_indexMapper->mapSelectionRightToLeft(_deselected);
 137     const QItemSelection mappedSelection   = m_indexMapper->mapSelectionRightToLeft(_selected);
 138
 139 //     const QItemSelection mappedDeselection = _deselected;
 140 //     const QItemSelection mappedSelection   = _selected;
 141
 142 //     std::cout << "XXXXXXXXXXXXX  mappedSelection.count() "   << mappedSelection.count() << std::endl;
 143 //     std::cout << "XXXXXXXXXXXXX  mappedDeselection.count() " << mappedDeselection.count() << std::endl;
 144
 145     q->QItemSelectionModel::select(mappedDeselection, QItemSelectionModel::Deselect);
 146     q->QItemSelectionModel::select(mappedSelection, QItemSelectionModel::Select);
 147
 148 //     q->select(mappedDeselection, QItemSelectionModel::Deselect);
 149 //     q->select(mappedSelection, QItemSelectionModel::Select);
 150
 151
 152 }
 153
 154     QAbstractItemModel * const m_model;
 155     QItemSelectionModel * const m_linkedItemSelectionModel;
 156     bool m_ignoreCurrentChanged;
 157     KModelIndexProxyMapper * const m_indexMapper;
 158 };
 159
 160
 161
 162 #endif