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