src/iconmanager.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Peter Penz <peter.penz@gmx.at>                  *
   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 "iconmanager.h"
  21
  22 #include "dolphinmodel.h"
  23 #include "dolphinsortfilterproxymodel.h"
  24
  25 #include <kiconeffect.h>
  26 #include <kio/previewjob.h>
  27 #include <kdebug.h>
  28 #include <kdirlister.h>
  29 #include <konqmimedata.h>
  30
  31 #include <QApplication>
  32 #include <QAbstractItemView>
  33 #include <QClipboard>
  34 #include <QIcon>
  35
  36 IconManager::IconManager(QAbstractItemView* parent, DolphinSortFilterProxyModel* model) :
  37     QObject(parent),
  38     m_showPreview(false),
  39     m_view(parent),
  40     m_previewJobs(),
  41     m_dolphinModel(0),
  42     m_proxyModel(model),
  43     m_cutItemsCache()
  44 {
  45     m_dolphinModel = static_cast<DolphinModel*>(m_proxyModel->sourceModel());
  46     connect(m_dolphinModel->dirLister(), SIGNAL(newItems(const KFileItemList&)),
  47             this, SLOT(generatePreviews(const KFileItemList&)));
  48
  49     QClipboard* clipboard = QApplication::clipboard();
  50     connect(clipboard, SIGNAL(dataChanged()),
  51             this, SLOT(updateCutItems()));
  52 }
  53
  54 IconManager::~IconManager()
  55 {
  56     foreach (KJob* job, m_previewJobs) {
  57         Q_ASSERT(job != 0);
  58         job->kill();
  59     }
  60     m_previewJobs.clear();
  61 }
  62
  63
  64 void IconManager::setShowPreview(bool show)
  65 {
  66     if (m_showPreview != show) {
  67         m_showPreview = show;
  68         m_cutItemsCache.clear();
  69         updateCutItems();
  70     }
  71 }
  72
  73 void IconManager::generatePreviews(const KFileItemList& items)
  74 {
  75     if (!m_showPreview) {
  76         return;
  77     }
  78
  79     const QRect visibleArea = m_view->viewport()->rect();
  80
  81     // Order the items in a way that the preview for the visible items
  82     // is generated first, as this improves the feeled performance a lot.
  83     KFileItemList orderedItems;
  84     foreach (KFileItem item, items) {
  85         const QModelIndex dirIndex = m_dolphinModel->indexForItem(item);
  86         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
  87         const QRect itemRect = m_view->visualRect(proxyIndex);
  88         if (itemRect.intersects(visibleArea)) {
  89             orderedItems.insert(0, item);
  90         } else {
  91             orderedItems.append(item);
  92         }
  93     }
  94
  95     KIO::PreviewJob* job = KIO::filePreview(orderedItems, 128);
  96     connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
  97             this, SLOT(replaceIcon(const KFileItem&, const QPixmap&)));
  98     connect(job, SIGNAL(finished(KJob*)),
  99             this, SLOT(slotPreviewJobFinished(KJob*)));
 100
 101     m_previewJobs.append(job);
 102 }
 103
 104 void IconManager::replaceIcon(const KFileItem& item, const QPixmap& pixmap)
 105 {
 106     Q_ASSERT(!item.isNull());
 107     KDirLister* dirLister = m_dolphinModel->dirLister();
 108     if (!m_showPreview || (item.url().directory() != dirLister->url().path())) {
 109         // the preview has been canceled in the meanwhile or the preview
 110         // job is still working on items of an older URL, hence
 111         // the item is not part of the directory model anymore
 112         return;
 113     }
 114
 115     const QModelIndex idx = m_dolphinModel->indexForItem(item);
 116     if (idx.isValid() && (idx.column() == 0)) {
 117         const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 118         if (KonqMimeData::decodeIsCutSelection(mimeData) && isCutItem(item)) {
 119             KIconEffect iconEffect;
 120             const QPixmap cutPixmap = iconEffect.apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 121             m_dolphinModel->setData(idx, QIcon(cutPixmap), Qt::DecorationRole);
 122         } else {
 123             m_dolphinModel->setData(idx, QIcon(pixmap), Qt::DecorationRole);
 124         }
 125     }
 126 }
 127
 128 void IconManager::slotPreviewJobFinished(KJob* job)
 129 {
 130     const int index = m_previewJobs.indexOf(job);
 131     m_previewJobs.removeAt(index);
 132 }
 133
 134 void IconManager::updateCutItems()
 135 {
 136     // restore the icons of all previously selected items to the
 137     // original state...
 138     foreach (CutItem cutItem, m_cutItemsCache) {
 139         const QModelIndex index = m_dolphinModel->indexForUrl(cutItem.url);
 140         if (index.isValid()) {
 141             m_dolphinModel->setData(index, QIcon(cutItem.pixmap), Qt::DecorationRole);
 142         }
 143     }
 144     m_cutItemsCache.clear();
 145
 146     // ... and apply an item effect to all currently cut items
 147     applyCutItemEffect();
 148 }
 149
 150 bool IconManager::isCutItem(const KFileItem& item) const
 151 {
 152     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 153     const KUrl::List cutUrls = KUrl::List::fromMimeData(mimeData);
 154
 155     const KUrl& itemUrl = item.url();
 156     foreach (KUrl url, cutUrls) {
 157         if (url == itemUrl) {
 158             return true;
 159         }
 160     }
 161
 162     return false;
 163 }
 164
 165 void IconManager::applyCutItemEffect()
 166 {
 167     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 168     if (!KonqMimeData::decodeIsCutSelection(mimeData)) {
 169         return;
 170     }
 171
 172     const KFileItemList items(m_dolphinModel->dirLister()->items());
 173     foreach (KFileItem item, items) {
 174         if (isCutItem(item)) {
 175             const QModelIndex index = m_dolphinModel->indexForItem(item);
 176             const QVariant value = m_dolphinModel->data(index, Qt::DecorationRole);
 177             if (value.type() == QVariant::Icon) {
 178                 const QIcon icon(qvariant_cast<QIcon>(value));
 179                 QPixmap pixmap = icon.pixmap(128, 128);
 180
 181                 // remember current pixmap for the item to be able
 182                 // to restore it when other items get cut
 183                 CutItem cutItem;
 184                 cutItem.url = item.url();
 185                 cutItem.pixmap = pixmap;
 186                 m_cutItemsCache.append(cutItem);
 187
 188                 // apply icon effect to the cut item
 189                 KIconEffect iconEffect;
 190                 pixmap = iconEffect.apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 191                 m_dolphinModel->setData(index, QIcon(pixmap), Qt::DecorationRole);
 192             }
 193         }
 194     }
 195 }
 196
 197 #include "iconmanager.moc"