src/views/dolphinitemlistview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.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 "dolphinitemlistview.h"
  21
  22 #include "dolphin_generalsettings.h"
  23 #include "dolphin_iconsmodesettings.h"
  24 #include "dolphin_detailsmodesettings.h"
  25 #include "dolphin_compactmodesettings.h"
  26 #include "dolphinfileitemlistwidget.h"
  27
  28 #include <kitemviews/kfileitemlistview.h>
  29 #include <kitemviews/kfileitemmodel.h>
  30 #include <kitemviews/kitemlistcontroller.h>
  31 #include <kitemviews/kitemliststyleoption.h>
  32
  33 #include <KIO/PreviewJob>
  34
  35 #include <views/viewmodecontroller.h>
  36
  37 #include "zoomlevelinfo.h"
  38
  39
  40 DolphinItemListView::DolphinItemListView(QGraphicsWidget* parent) :
  41     KFileItemListView(parent),
  42     m_zoomLevel(0)
  43 {
  44     updateFont();
  45     updateGridSize();
  46 }
  47
  48 DolphinItemListView::~DolphinItemListView()
  49 {
  50     writeSettings();
  51 }
  52
  53 void DolphinItemListView::setZoomLevel(int level)
  54 {
  55     if (level < ZoomLevelInfo::minimumLevel()) {
  56         level = ZoomLevelInfo::minimumLevel();
  57     } else if (level > ZoomLevelInfo::maximumLevel()) {
  58         level = ZoomLevelInfo::maximumLevel();
  59     }
  60
  61     if (level == m_zoomLevel) {
  62         return;
  63     }
  64
  65     m_zoomLevel = level;
  66
  67     ViewModeSettings settings(viewMode());
  68     if (previewsShown()) {
  69         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
  70         settings.setPreviewSize(previewSize);
  71     } else {
  72         const int iconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
  73         settings.setIconSize(iconSize);
  74     }
  75
  76     updateGridSize();
  77 }
  78
  79 int DolphinItemListView::zoomLevel() const
  80 {
  81     return m_zoomLevel;
  82 }
  83
  84 void DolphinItemListView::readSettings()
  85 {
  86     ViewModeSettings settings(viewMode());
  87     settings.readConfig();
  88
  89     beginTransaction();
  90
  91     setEnabledSelectionToggles(GeneralSettings::showSelectionToggle());
  92     setSupportsItemExpanding(itemLayoutSupportsItemExpanding(itemLayout()));
  93
  94     updateFont();
  95     updateGridSize();
  96
  97     const KConfigGroup globalConfig(KSharedConfig::openConfig(), "PreviewSettings");
  98     QStringList enabledPlugins = globalConfig.readEntry("Plugins", QStringList());
  99     if (enabledPlugins.isEmpty()) {
 100         enabledPlugins = KIO::PreviewJob::defaultPlugins();
 101     }
 102     setEnabledPlugins(enabledPlugins);
 103
 104     endTransaction();
 105 }
 106
 107 void DolphinItemListView::writeSettings()
 108 {
 109     IconsModeSettings::self()->save();
 110     CompactModeSettings::self()->save();
 111     DetailsModeSettings::self()->save();
 112 }
 113
 114 KItemListWidgetCreatorBase* DolphinItemListView::defaultWidgetCreator() const
 115 {
 116     return new KItemListWidgetCreator<DolphinFileItemListWidget>();
 117 }
 118
 119 bool DolphinItemListView::itemLayoutSupportsItemExpanding(ItemLayout layout) const
 120 {
 121     return layout == DetailsLayout && DetailsModeSettings::expandableFolders();
 122 }
 123
 124 void DolphinItemListView::onItemLayoutChanged(ItemLayout current, ItemLayout previous)
 125 {
 126     setHeaderVisible(current == DetailsLayout);
 127
 128     updateFont();
 129     updateGridSize();
 130
 131     KFileItemListView::onItemLayoutChanged(current, previous);
 132 }
 133
 134 void DolphinItemListView::onPreviewsShownChanged(bool shown)
 135 {
 136     Q_UNUSED(shown);
 137     updateGridSize();
 138 }
 139
 140 void DolphinItemListView::onVisibleRolesChanged(const QList<QByteArray>& current,
 141                                                 const QList<QByteArray>& previous)
 142 {
 143     KFileItemListView::onVisibleRolesChanged(current, previous);
 144     updateGridSize();
 145 }
 146
 147 void DolphinItemListView::updateFont()
 148 {
 149     const ViewModeSettings settings(viewMode());
 150
 151     if (settings.useSystemFont()) {
 152         KItemListView::updateFont();
 153     } else {
 154         QFont font(settings.fontFamily(), qRound(settings.fontSize()));
 155         font.setItalic(settings.italicFont());
 156         font.setWeight(settings.fontWeight());
 157         font.setPointSizeF(settings.fontSize());
 158
 159         KItemListStyleOption option = styleOption();
 160         option.font = font;
 161         option.fontMetrics = QFontMetrics(font);
 162
 163         setStyleOption(option);
 164     }
 165 }
 166
 167 void DolphinItemListView::updateGridSize()
 168 {
 169     const ViewModeSettings settings(viewMode());
 170
 171     // Calculate the size of the icon
 172     const int iconSize = previewsShown() ? settings.previewSize() : settings.iconSize();
 173     m_zoomLevel = ZoomLevelInfo::zoomLevelForIconSize(QSize(iconSize, iconSize));
 174     KItemListStyleOption option = styleOption();
 175
 176     const int padding = 2;
 177     int horizontalMargin = 0;
 178     int verticalMargin = 0;
 179
 180     // Calculate the item-width and item-height
 181     int itemWidth;
 182     int itemHeight;
 183     int maxTextLines = 0;
 184     int maxTextWidth = 0;
 185
 186     switch (itemLayout()) {
 187     case KFileItemListView::IconsLayout: {
 188         const int minItemWidth = 48;
 189         itemWidth = minItemWidth + IconsModeSettings::textWidthIndex() * 64;
 190
 191         if (previewsShown()) {
 192             // Optimize the width for previews with a 3:2 aspect ratio instead
 193             // of a 1:1 ratio to avoid wasting too much vertical space when
 194             // showing photos.
 195             const int minWidth = iconSize * 3 / 2;
 196             itemWidth = qMax(itemWidth, minWidth);
 197         }
 198
 199         if (itemWidth < iconSize + padding * 2) {
 200             itemWidth = iconSize + padding * 2;
 201         }
 202
 203         itemHeight = padding * 3 + iconSize + option.fontMetrics.lineSpacing();
 204
 205         horizontalMargin = 4;
 206         verticalMargin = 8;
 207         maxTextLines = IconsModeSettings::maximumTextLines();
 208         break;
 209     }
 210     case KFileItemListView::CompactLayout: {
 211         itemWidth = padding * 4 + iconSize + option.fontMetrics.height() * 5;
 212         const int textLinesCount = visibleRoles().count();
 213         itemHeight = padding * 2 + qMax(iconSize, textLinesCount * option.fontMetrics.lineSpacing());
 214
 215         if (CompactModeSettings::maximumTextWidthIndex() > 0) {
 216             // A restriction is given for the maximum width of the text (0 means
 217             // having no restriction)
 218             maxTextWidth = option.fontMetrics.height() * 10 * CompactModeSettings::maximumTextWidthIndex();
 219         }
 220
 221         horizontalMargin = 8;
 222         break;
 223     }
 224     case KFileItemListView::DetailsLayout: {
 225         itemWidth = -1;
 226         itemHeight = padding * 2 + qMax(iconSize, option.fontMetrics.lineSpacing());
 227         break;
 228     }
 229     default:
 230         itemWidth = -1;
 231         itemHeight = -1;
 232         Q_ASSERT(false);
 233         break;
 234     }
 235
 236     // Apply the calculated values
 237     option.padding = padding;
 238     option.horizontalMargin = horizontalMargin;
 239     option.verticalMargin = verticalMargin;
 240     option.iconSize = iconSize;
 241     option.maxTextLines = maxTextLines;
 242     option.maxTextWidth = maxTextWidth;
 243     beginTransaction();
 244     setStyleOption(option);
 245     setItemSize(QSizeF(itemWidth, itemHeight));
 246     endTransaction();
 247 }
 248
 249 ViewModeSettings::ViewMode DolphinItemListView::viewMode() const
 250 {
 251     ViewModeSettings::ViewMode mode;
 252
 253     switch (itemLayout()) {
 254     case KFileItemListView::IconsLayout:   mode = ViewModeSettings::IconsMode; break;
 255     case KFileItemListView::CompactLayout: mode = ViewModeSettings::CompactMode; break;
 256     case KFileItemListView::DetailsLayout: mode = ViewModeSettings::DetailsMode; break;
 257     default:                               mode = ViewModeSettings::IconsMode;
 258                                            Q_ASSERT(false);
 259                                            break;
 260     }
 261
 262     return mode;
 263 }
 264