src/views/dolphinitemlistview.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "dolphinitemlistview.h"
   8
   9 #include "dolphin_compactmodesettings.h"
  10 #include "dolphin_detailsmodesettings.h"
  11 #include "dolphin_generalsettings.h"
  12 #include "dolphin_iconsmodesettings.h"
  13 #include "dolphinfileitemlistwidget.h"
  14 #include "kitemviews/kfileitemmodel.h"
  15 #include "kitemviews/kitemlistcontroller.h"
  16 #include "settings/viewmodes/viewmodesettings.h"
  17 #include "views/viewmodecontroller.h"
  18 #include "zoomlevelinfo.h"
  19
  20 #include <KIO/PreviewJob>
  21 #include <QtMath>
  22
  23
  24 DolphinItemListView::DolphinItemListView(QGraphicsWidget* parent) :
  25     KFileItemListView(parent),
  26     m_zoomLevel(0)
  27 {
  28     updateFont();
  29     updateGridSize();
  30 }
  31
  32 DolphinItemListView::~DolphinItemListView()
  33 {
  34     writeSettings();
  35 }
  36
  37 void DolphinItemListView::setZoomLevel(int level)
  38 {
  39     if (level < ZoomLevelInfo::minimumLevel()) {
  40         level = ZoomLevelInfo::minimumLevel();
  41     } else if (level > ZoomLevelInfo::maximumLevel()) {
  42         level = ZoomLevelInfo::maximumLevel();
  43     }
  44
  45     if (level == m_zoomLevel) {
  46         return;
  47     }
  48
  49     m_zoomLevel = level;
  50
  51     ViewModeSettings settings(itemLayout());
  52     if (previewsShown()) {
  53         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
  54         settings.setPreviewSize(previewSize);
  55     } else {
  56         const int iconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
  57         settings.setIconSize(iconSize);
  58     }
  59
  60     updateGridSize();
  61 }
  62
  63 int DolphinItemListView::zoomLevel() const
  64 {
  65     return m_zoomLevel;
  66 }
  67
  68 void DolphinItemListView::readSettings()
  69 {
  70     ViewModeSettings settings(itemLayout());
  71     settings.readConfig();
  72
  73     beginTransaction();
  74
  75     setEnabledSelectionToggles(GeneralSettings::showSelectionToggle());
  76     setHighlightEntireRow(DetailsModeSettings::sidePadding());
  77     setSupportsItemExpanding(itemLayoutSupportsItemExpanding(itemLayout()));
  78
  79     updateFont();
  80     updateGridSize();
  81
  82     const KConfigGroup globalConfig(KSharedConfig::openConfig(), "PreviewSettings");
  83     setEnabledPlugins(globalConfig.readEntry("Plugins", KIO::PreviewJob::defaultPlugins()));
  84     setLocalFileSizePreviewLimit(globalConfig.readEntry("MaximumSize", 0));
  85     endTransaction();
  86 }
  87
  88 void DolphinItemListView::writeSettings()
  89 {
  90     IconsModeSettings::self()->save();
  91     CompactModeSettings::self()->save();
  92     DetailsModeSettings::self()->save();
  93 }
  94
  95 KItemListWidgetCreatorBase* DolphinItemListView::defaultWidgetCreator() const
  96 {
  97     return new KItemListWidgetCreator<DolphinFileItemListWidget>();
  98 }
  99
 100 bool DolphinItemListView::itemLayoutSupportsItemExpanding(ItemLayout layout) const
 101 {
 102     return layout == DetailsLayout && DetailsModeSettings::expandableFolders();
 103 }
 104
 105 void DolphinItemListView::onItemLayoutChanged(ItemLayout current, ItemLayout previous)
 106 {
 107     setHeaderVisible(current == DetailsLayout);
 108
 109     updateFont();
 110     updateGridSize();
 111
 112     KFileItemListView::onItemLayoutChanged(current, previous);
 113 }
 114
 115 void DolphinItemListView::onPreviewsShownChanged(bool shown)
 116 {
 117     Q_UNUSED(shown)
 118     updateGridSize();
 119 }
 120
 121 void DolphinItemListView::onVisibleRolesChanged(const QList<QByteArray>& current,
 122                                                 const QList<QByteArray>& previous)
 123 {
 124     KFileItemListView::onVisibleRolesChanged(current, previous);
 125     updateGridSize();
 126 }
 127
 128 void DolphinItemListView::updateFont()
 129 {
 130     const ViewModeSettings settings(itemLayout());
 131
 132     if (settings.useSystemFont()) {
 133         KItemListView::updateFont();
 134     } else {
 135         QFont font(settings.viewFont());
 136
 137         KItemListStyleOption option = styleOption();
 138         option.font = font;
 139         option.fontMetrics = QFontMetrics(font);
 140
 141         setStyleOption(option);
 142     }
 143 }
 144
 145 void DolphinItemListView::updateGridSize()
 146 {
 147     const ViewModeSettings settings(itemLayout());
 148
 149     // Calculate the size of the icon
 150     const int iconSize = previewsShown() ? settings.previewSize() : settings.iconSize();
 151     m_zoomLevel = ZoomLevelInfo::zoomLevelForIconSize(QSize(iconSize, iconSize));
 152     KItemListStyleOption option = styleOption();
 153
 154     const int padding = 2;
 155     int horizontalMargin = 0;
 156     int verticalMargin = 0;
 157
 158     // Calculate the item-width and item-height
 159     int itemWidth;
 160     int itemHeight;
 161     int maxTextLines = 0;
 162     int maxTextWidth = 0;
 163
 164     switch (itemLayout()) {
 165     case KFileItemListView::IconsLayout: {
 166
 167         // an exponential factor based on zoom, 0 -> 1, 4 -> 1.36 8 -> ~1.85, 16 -> 3.4
 168         auto zoomFactor = qExp(m_zoomLevel / 13.0);
 169         // 9 is the average char width for 10pt Noto Sans, making fontFactor =1
 170         // by each pixel the font gets larger the factor increases by 1/9
 171         auto fontFactor = option.fontMetrics.averageCharWidth() / 9.0;
 172         itemWidth = 48 + IconsModeSettings::textWidthIndex() * 64 * fontFactor * zoomFactor;
 173
 174         if (itemWidth < iconSize + padding * 2 * zoomFactor) {
 175             itemWidth = iconSize + padding * 2 * zoomFactor;
 176         }
 177
 178         itemHeight = padding * 3 + iconSize + option.fontMetrics.lineSpacing();
 179
 180         horizontalMargin = 4;
 181         verticalMargin = 8;
 182         maxTextLines = IconsModeSettings::maximumTextLines();
 183         break;
 184     }
 185     case KFileItemListView::CompactLayout: {
 186         itemWidth = padding * 4 + iconSize + option.fontMetrics.height() * 5;
 187         const int textLinesCount = visibleRoles().count();
 188         itemHeight = padding * 2 + qMax(iconSize, textLinesCount * option.fontMetrics.lineSpacing());
 189
 190         if (CompactModeSettings::maximumTextWidthIndex() > 0) {
 191             // A restriction is given for the maximum width of the text (0 means
 192             // having no restriction)
 193             maxTextWidth = option.fontMetrics.height() * 10 * CompactModeSettings::maximumTextWidthIndex();
 194         }
 195
 196         horizontalMargin = 8;
 197         break;
 198     }
 199     case KFileItemListView::DetailsLayout: {
 200         itemWidth = -1;
 201         itemHeight = padding * 2 + qMax(iconSize, option.fontMetrics.lineSpacing());
 202         break;
 203     }
 204     default:
 205         itemWidth = -1;
 206         itemHeight = -1;
 207         Q_ASSERT(false);
 208         break;
 209     }
 210
 211     // Apply the calculated values
 212     option.padding = padding;
 213     option.horizontalMargin = horizontalMargin;
 214     option.verticalMargin = verticalMargin;
 215     option.iconSize = iconSize;
 216     option.maxTextLines = maxTextLines;
 217     option.maxTextWidth = maxTextWidth;
 218     beginTransaction();
 219     setStyleOption(option);
 220     setItemSize(QSizeF(itemWidth, itemHeight));
 221     endTransaction();
 222 }