src/HEXABLOCKGUI/klinkitemselectionmodel.cxx

   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 #include <QtCore/QObject>
  23 #include "klinkitemselectionmodel.hxx"
  24 // #include "klinkitemselectionmodel_p.hxx"
  25
  26 #include "kmodelindexproxymapper.hxx"
  27
  28 // #include "kdebug.h"
  29
  30 #include <QItemSelection>
  31
  32 #include <iostream>
  33
  34
  35 KLinkItemSelectionModel::KLinkItemSelectionModel(QAbstractItemModel *model, QItemSelectionModel *proxySelector, QObject *parent)
  36         : QItemSelectionModel(model, parent),
  37         d_ptr(new KLinkItemSelectionModelPrivate(this, model, proxySelector))
  38 {
  39     connect(proxySelector, SIGNAL(selectionChanged(QItemSelection, QItemSelection)), SLOT(sourceSelectionChanged(QItemSelection, QItemSelection)));
  40 }
  41
  42 KLinkItemSelectionModel::~KLinkItemSelectionModel()
  43 {
  44     delete d_ptr;
  45 }
  46
  47 void KLinkItemSelectionModel::select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command)
  48 {
  49     //std::cout<<"KLinkItemSelectionModel::select(const QModelIndex &index"<<std::endl;
  50     Q_D(KLinkItemSelectionModel);
  51     // When an item is removed, the current index is set to the top index in the model.
  52     // That causes a selectionChanged signal with a selection which we do not want.
  53     if (d->m_ignoreCurrentChanged) {
  54         return;
  55     }
  56     QItemSelectionModel::select(index, command);
  57     if (index.isValid())
  58         d->m_linkedItemSelectionModel->select(d->m_indexMapper->mapSelectionLeftToRight(QItemSelection(index, index)), command);
  59     else {
  60         d->m_linkedItemSelectionModel->clearSelection();
  61     }
  62 }
  63
  64 // // QAbstractProxyModel::mapSelectionFromSource creates invalid ranges to we filter
  65 // // those out manually in a loop. Hopefully fixed in Qt 4.7.2, so we ifdef it out.
  66 // // http://qt.gitorious.org/qt/qt/merge_requests/2474
  67 // // http://qt.gitorious.org/qt/qt/merge_requests/831
  68 // #if QT_VERSION < 0x040702
  69 // #define RANGE_FIX_HACK
  70 // #endif
  71 //
  72 // #ifdef RANGE_FIX_HACK
  73 // static QItemSelection klink_removeInvalidRanges(const QItemSelection &selection)
  74 // {
  75 //   QItemSelection result;
  76 //   Q_FOREACH(const QItemSelectionRange &range, selection)
  77 //   {
  78 //     if (!range.isValid())
  79 //       continue;
  80 //     result << range;
  81 //   }
  82 //   return result;
  83 // }
  84 // #endif
  85
  86 void KLinkItemSelectionModel::select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command)
  87 {
  88 //  std::cout<<"KLinkItemSelectionModel::select(const QItemSelection &selection"<<std::endl;
  89
  90   Q_FOREACH(const QItemSelectionRange &range, selection){
  91 //     if (range.isEmpty()){
  92 //       std::cout<<"range    EMPTY"<<std::endl;
  93 //     } else {
  94 //       std::cout<<"range    NOT EMPTY"<<std::endl;
  95 //     }
  96 //    if (range.isValid()){
  97 //      std::cout<<"range    VALID"<<std::endl;
  98 //      std::cout<<"count           =>"<<range.indexes().count()<<std::endl;
  99 //      Q_FOREACH(const QModelIndex &i, range.indexes())
 100 //        std::cout<< " KLinkItemSelectionModel::select =====> " << i.data().toString().toStdString() << std::endl;
 101 //    } else {
 102 //      std::cout<<"range    NOT VALID"<<std::endl;
 103 //    }
 104   }
 105
 106
 107     Q_D(KLinkItemSelectionModel);
 108     d->m_ignoreCurrentChanged = true;
 109 #ifdef RANGE_FIX_HACK
 110     QItemSelection _selection = klink_removeInvalidRanges(selection);
 111 #else
 112     QItemSelection _selection = selection;
 113 #endif
 114     QItemSelectionModel::select(_selection, command);
 115     Q_ASSERT(d->assertSelectionValid(_selection));
 116     QItemSelection mappedSelection = d->m_indexMapper->mapSelectionLeftToRight(_selection);
 117     Q_ASSERT(d->assertSelectionValid(mappedSelection));
 118     d->m_linkedItemSelectionModel->select(mappedSelection, command);
 119     d->m_ignoreCurrentChanged = false;
 120 }
 121
 122
 123
 124 // #include "klinkitemselectionmodel_moc.cxx"
 125 // #include "klinkitemselectionmodel.moc"
 126