src/views/dolphindetailsviewexpander.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Frank Reininghaus (frank78ac@googlemail.com)    *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphindetailsviewexpander.h"
  21
  22 #include "dolphindetailsview.h"
  23 #include "dolphinmodel.h"
  24 #include "dolphinsortfilterproxymodel.h"
  25
  26 #include <KDirLister>
  27 #include <KDirModel>
  28
  29 DolphinDetailsViewExpander::DolphinDetailsViewExpander(DolphinDetailsView* parent,
  30                                                        const QSet<KUrl>& urlsToExpand) :
  31     QObject(parent),
  32     m_detailsView(parent),
  33     m_dirLister(0),
  34     m_dolphinModel(0),
  35     m_proxyModel(0)
  36 {
  37     Q_ASSERT(parent != 0);
  38
  39     m_proxyModel = qobject_cast<const DolphinSortFilterProxyModel*>(parent->model());
  40     Q_ASSERT(m_proxyModel != 0);
  41
  42     m_dolphinModel = qobject_cast<const DolphinModel*>(m_proxyModel->sourceModel());
  43     Q_ASSERT(m_dolphinModel != 0);
  44
  45     m_dirLister = m_dolphinModel->dirLister();
  46     Q_ASSERT(m_dirLister != 0);
  47
  48     // The URLs must be sorted. E.g. /home/user/ cannot be expanded before /home/
  49     // because it is not known to the dir model before.
  50     m_urlsToExpand = urlsToExpand.toList();
  51     qSort(m_urlsToExpand);
  52
  53     // The dir lister must have completed the folder listing before a subfolder can be expanded.
  54     connect(m_dirLister, SIGNAL(completed()), this, SLOT(slotDirListerCompleted()));
  55 }
  56
  57 DolphinDetailsViewExpander::~DolphinDetailsViewExpander()
  58 {
  59 }
  60
  61 void DolphinDetailsViewExpander::stop()
  62 {
  63     disconnect(m_dirLister, SIGNAL(completed()), this, SLOT(slotDirListerCompleted()));
  64     deleteLater();
  65 }
  66
  67 void DolphinDetailsViewExpander::slotDirListerCompleted()
  68 {
  69     QModelIndex dirIndex;
  70
  71     while(!m_urlsToExpand.isEmpty() && !dirIndex.isValid()) {
  72         const KUrl url = m_urlsToExpand.takeFirst();
  73         dirIndex = m_dolphinModel->indexForUrl(url);
  74     }
  75
  76     if(dirIndex.isValid()) {
  77         // A valid model index was found. Note that only one item is expanded in each call of this slot
  78         // because expanding any item will trigger KDirLister::openUrl(...) via KDirModel::fetchMore(...),
  79         // and we can only continue when the dir lister is done.
  80         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
  81         m_detailsView->expand(proxyIndex);
  82     }
  83     else {
  84         emit completed();
  85         stop();
  86     }
  87 }