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 "HEXABLOCKGUI_Export.hxx"
  26
  27 #include <QtCore/QObject>
  28 #include <QtGui/QItemSelectionModel>
  29 #include <QtGui/QAbstractProxyModel>
  30
  31 #include <iostream>
  32
  33 // #include "kdeui_export.h"
  34 // #include "klinkitemselectionmodel_p.hxx"
  35
  36 #include "kmodelindexproxymapper.hxx"
  37
  38 class KLinkItemSelectionModelPrivate;
  39
  40 class HEXABLOCK_EXPORT KLinkItemSelectionModel : public QItemSelectionModel
  41 {
  42     Q_OBJECT
  43 public:
  44     KLinkItemSelectionModel(QAbstractItemModel *targetModel, QItemSelectionModel *linkedItemSelectionModel, QObject *parent = 0);
  45     ~KLinkItemSelectionModel();
  46     /* reimp */ void select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command);
  47     /* reimp */ void select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command);
  48
  49 protected:
  50     KLinkItemSelectionModelPrivate * const d_ptr;
  51
  52 private:
  53     Q_DECLARE_PRIVATE(KLinkItemSelectionModel)
  54     Q_PRIVATE_SLOT( d_func(), void sourceSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected))
  55
  56 };
  57
  58
  59 // QAbstractProxyModel::mapSelectionFromSource creates invalid ranges to we filter
  60 // those out manually in a loop. Hopefully fixed in Qt 4.7.2, so we ifdef it out.
  61 // http://qt.gitorious.org/qt/qt/merge_requests/2474
  62 // http://qt.gitorious.org/qt/qt/merge_requests/831
  63 #if QT_VERSION < 0x040702
  64 #define RANGE_FIX_HACK
  65 #endif
  66
  67 #ifdef RANGE_FIX_HACK
  68 static QItemSelection klink_removeInvalidRanges(const QItemSelection &selection)
  69 {
  70 //   std::cout<< " klink_removeInvalidRanges " << std::endl;
  71   QItemSelection result;
  72   Q_FOREACH(const QItemSelectionRange &range, selection)
  73   {
  74
  75 //    Q_FOREACH(const QModelIndex &i, range.indexes ())
  76 //    {
  77 ////       std::cout<< " =====> " << i.data().toString().toStdString() << std::endl;
  78 //    }
  79     if (!range.isValid())
  80       continue;
  81 //     std::cout<< " is VALID !!"<< std::endl;
  82     result << range;
  83   }
  84   return result;
  85 }
  86 #endif
  87
  88
  89 class HEXABLOCK_EXPORT KLinkItemSelectionModelPrivate
  90 {
  91 public:
  92     KLinkItemSelectionModelPrivate(KLinkItemSelectionModel *proxySelectionModel, QAbstractItemModel *model,
  93                                     QItemSelectionModel *linkedItemSelectionModel)
  94       : q_ptr(proxySelectionModel),
  95         m_model(model),
  96         m_linkedItemSelectionModel(linkedItemSelectionModel),
  97         m_ignoreCurrentChanged(false),
  98         m_indexMapper(new KModelIndexProxyMapper(model, linkedItemSelectionModel->model(), proxySelectionModel))
  99     {
 100     }
 101
 102     Q_DECLARE_PUBLIC(KLinkItemSelectionModel)
 103     KLinkItemSelectionModel * const q_ptr;
 104
 105
 106     bool assertSelectionValid(const QItemSelection &selection) const {
 107       foreach(const QItemSelectionRange &range, selection) {
 108 //         if (!range.isValid()) {
 109 //           kDebug() << selection;
 110 //         }
 111
 112         Q_ASSERT(range.isValid());
 113       }
 114       return true;
 115     }
 116
 117 void sourceSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
 118 {
 119
 120
 121     Q_Q(KLinkItemSelectionModel);
 122 #ifdef RANGE_FIX_HACK
 123 //     std::cout<<"XXXXXXXXXXXXX  sourceSelectionChanged!!!!!!!! RANGE_FIX_HACK"<<std::endl;
 124     QItemSelection _selected = klink_removeInvalidRanges(selected);
 125     QItemSelection _deselected = klink_removeInvalidRanges(deselected);
 126 #else
 127 //     std::cout<<"XXXXXXXXXXXXX  sourceSelectionChanged!!!!!!!! "<<std::endl;
 128     QItemSelection _selected = selected;
 129     QItemSelection _deselected = deselected;
 130 #endif
 131     Q_ASSERT(assertSelectionValid(_selected));
 132     Q_ASSERT(assertSelectionValid(_deselected));
 133
 134 //     std::cout << "XXXXXXXXXXXXX  _selected.count() "   << _selected.count() << std::endl;
 135 //     std::cout << "XXXXXXXXXXXXX  _deselected.count() " << _deselected.count() << std::endl;
 136
 137     const QItemSelection mappedDeselection = m_indexMapper->mapSelectionRightToLeft(_deselected);
 138     const QItemSelection mappedSelection   = m_indexMapper->mapSelectionRightToLeft(_selected);
 139
 140 //     const QItemSelection mappedDeselection = _deselected;
 141 //     const QItemSelection mappedSelection   = _selected;
 142
 143 //     std::cout << "XXXXXXXXXXXXX  mappedSelection.count() "   << mappedSelection.count() << std::endl;
 144 //     std::cout << "XXXXXXXXXXXXX  mappedDeselection.count() " << mappedDeselection.count() << std::endl;
 145
 146     q->QItemSelectionModel::select(mappedDeselection, QItemSelectionModel::Deselect);
 147     q->QItemSelectionModel::select(mappedSelection, QItemSelectionModel::Select);
 148
 149 //     q->select(mappedDeselection, QItemSelectionModel::Deselect);
 150 //     q->select(mappedSelection, QItemSelectionModel::Select);
 151
 152
 153 }
 154
 155     QAbstractItemModel * const m_model;
 156     QItemSelectionModel * const m_linkedItemSelectionModel;
 157     bool m_ignoreCurrentChanged;
 158     KModelIndexProxyMapper * const m_indexMapper;
 159 };
 160
 161
 162
 163 #endif