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 <QColor>
  35 #include <QIcon>
  36
  37 IconManager::IconManager(QAbstractItemView* parent, DolphinSortFilterProxyModel* model) :
  38     QObject(parent),
  39     m_showPreview(false),
  40     m_view(parent),
  41     m_previewJobs(),
  42     m_dolphinModel(0),
  43     m_proxyModel(model),
  44     m_cutItemsCache()
  45 {
  46     Q_ASSERT(m_view->iconSize().isValid());  // each view must provide its current icon size
  47
  48     m_dolphinModel = static_cast<DolphinModel*>(m_proxyModel->sourceModel());
  49     connect(m_dolphinModel->dirLister(), SIGNAL(newItems(const KFileItemList&)),
  50             this, SLOT(updateIcons(const KFileItemList&)));
  51
  52     QClipboard* clipboard = QApplication::clipboard();
  53     connect(clipboard, SIGNAL(dataChanged()),
  54             this, SLOT(updateCutItems()));
  55 }
  56
  57 IconManager::~IconManager()
  58 {
  59     foreach (KJob* job, m_previewJobs) {
  60         Q_ASSERT(job != 0);
  61         job->kill();
  62     }
  63     m_previewJobs.clear();
  64 }
  65
  66
  67 void IconManager::setShowPreview(bool show)
  68 {
  69     if (m_showPreview != show) {
  70         m_showPreview = show;
  71         m_cutItemsCache.clear();
  72         updateCutItems();
  73     }
  74 }
  75
  76 void IconManager::updateIcons(const KFileItemList& items)
  77 {
  78     // make the icons of all hidden files semitransparent
  79     foreach (KFileItem item, items) {
  80         if (item.name().startsWith('.')) {
  81             applyHiddenItemEffect(item);
  82         }
  83     }
  84
  85     if (!m_showPreview) {
  86         return;
  87     }
  88
  89     // generate previews
  90     const QRect visibleArea = m_view->viewport()->rect();
  91
  92     // Order the items in a way that the preview for the visible items
  93     // is generated first, as this improves the feeled performance a lot.
  94     KFileItemList orderedItems;
  95     foreach (KFileItem item, items) {
  96         if (item.name().startsWith('.')) {
  97             applyHiddenItemEffect(item);
  98         }
  99
 100         const QModelIndex dirIndex = m_dolphinModel->indexForItem(item);
 101         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 102         const QRect itemRect = m_view->visualRect(proxyIndex);
 103         if (itemRect.intersects(visibleArea)) {
 104             orderedItems.insert(0, item);
 105         } else {
 106             orderedItems.append(item);
 107         }
 108     }
 109
 110     const QSize size = m_view->iconSize();
 111     KIO::PreviewJob* job = KIO::filePreview(orderedItems, size.width(), size.height());
 112     connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 113             this, SLOT(replaceIcon(const KFileItem&, const QPixmap&)));
 114     connect(job, SIGNAL(finished(KJob*)),
 115             this, SLOT(slotPreviewJobFinished(KJob*)));
 116
 117     m_previewJobs.append(job);
 118 }
 119
 120 void IconManager::replaceIcon(const KFileItem& item, const QPixmap& pixmap)
 121 {
 122     Q_ASSERT(!item.isNull());
 123     KDirLister* dirLister = m_dolphinModel->dirLister();
 124     if (!m_showPreview || (item.url().directory() != dirLister->url().path())) {
 125         // the preview has been canceled in the meanwhile or the preview
 126         // job is still working on items of an older URL, hence
 127         // the item is not part of the directory model anymore
 128         return;
 129     }
 130
 131     const QModelIndex idx = m_dolphinModel->indexForItem(item);
 132     if (idx.isValid() && (idx.column() == 0)) {
 133         QPixmap newPixmap = pixmap;
 134         if (item.name().startsWith('.')) {
 135             KIconEffect::semiTransparent(newPixmap);
 136         }
 137
 138         const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 139         if (KonqMimeData::decodeIsCutSelection(mimeData) && isCutItem(item)) {
 140             KIconEffect iconEffect;
 141             newPixmap = iconEffect.apply(newPixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 142             m_dolphinModel->setData(idx, QIcon(newPixmap), Qt::DecorationRole);
 143         } else {
 144             m_dolphinModel->setData(idx, QIcon(newPixmap), Qt::DecorationRole);
 145         }
 146     }
 147 }
 148
 149 void IconManager::slotPreviewJobFinished(KJob* job)
 150 {
 151     const int index = m_previewJobs.indexOf(job);
 152     m_previewJobs.removeAt(index);
 153 }
 154
 155 void IconManager::updateCutItems()
 156 {
 157     // restore the icons of all previously selected items to the
 158     // original state...
 159     foreach (CutItem cutItem, m_cutItemsCache) {
 160         const QModelIndex index = m_dolphinModel->indexForUrl(cutItem.url);
 161         if (index.isValid()) {
 162             m_dolphinModel->setData(index, QIcon(cutItem.pixmap), Qt::DecorationRole);
 163         }
 164     }
 165     m_cutItemsCache.clear();
 166
 167     // ... and apply an item effect to all currently cut items
 168     applyCutItemEffect();
 169 }
 170
 171 bool IconManager::isCutItem(const KFileItem& item) const
 172 {
 173     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 174     const KUrl::List cutUrls = KUrl::List::fromMimeData(mimeData);
 175
 176     const KUrl& itemUrl = item.url();
 177     foreach (KUrl url, cutUrls) {
 178         if (url == itemUrl) {
 179             return true;
 180         }
 181     }
 182
 183     return false;
 184 }
 185
 186 void IconManager::applyCutItemEffect()
 187 {
 188     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 189     if (!KonqMimeData::decodeIsCutSelection(mimeData)) {
 190         return;
 191     }
 192
 193     const KFileItemList items(m_dolphinModel->dirLister()->items());
 194     foreach (KFileItem item, items) {
 195         if (isCutItem(item)) {
 196             const QModelIndex index = m_dolphinModel->indexForItem(item);
 197             const QVariant value = m_dolphinModel->data(index, Qt::DecorationRole);
 198             if (value.type() == QVariant::Icon) {
 199                 const QIcon icon(qvariant_cast<QIcon>(value));
 200                 QPixmap pixmap = icon.pixmap(m_view->iconSize());
 201
 202                 // remember current pixmap for the item to be able
 203                 // to restore it when other items get cut
 204                 CutItem cutItem;
 205                 cutItem.url = item.url();
 206                 cutItem.pixmap = pixmap;
 207                 m_cutItemsCache.append(cutItem);
 208
 209                 // apply icon effect to the cut item
 210                 KIconEffect iconEffect;
 211                 pixmap = iconEffect.apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 212                 m_dolphinModel->setData(index, QIcon(pixmap), Qt::DecorationRole);
 213             }
 214         }
 215     }
 216 }
 217
 218 void IconManager::applyHiddenItemEffect(const KFileItem& hiddenItem)
 219 {
 220     const QModelIndex index = m_dolphinModel->indexForItem(hiddenItem);
 221     const QVariant value = m_dolphinModel->data(index, Qt::DecorationRole);
 222     if (value.type() == QVariant::Icon) {
 223         const QIcon icon(qvariant_cast<QIcon>(value));
 224         QPixmap pixmap = icon.pixmap(m_view->iconSize());
 225         KIconEffect::semiTransparent(pixmap);
 226         m_dolphinModel->setData(index, QIcon(pixmap), Qt::DecorationRole);
 227     }
 228 }
 229
 230 #include "iconmanager.moc"