src/settings/previewssettingspage.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 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 "previewssettingspage.h"
  21 #include "dolphinsettings.h"
  22
  23 #include "dolphin_generalsettings.h"
  24
  25 #include <QCheckBox>
  26 #include <QEvent>
  27 #include <QGroupBox>
  28 #include <QLabel>
  29 #include <QListWidget>
  30 #include <QRadioButton>
  31 #include <QSlider>
  32 #include <QSpinBox>
  33 #include <QBoxLayout>
  34
  35 #include <kconfiggroup.h>
  36 #include <kdialog.h>
  37 #include <kglobal.h>
  38 #include <klocale.h>
  39 #include <khbox.h>
  40 #include <kservicetypetrader.h>
  41 #include <kservice.h>
  42 #include <kvbox.h>
  43
  44 // default settings
  45 const bool USE_THUMBNAILS = true;
  46 const int MAX_PREVIEW_SIZE = 5; // 5 MB
  47
  48 PreviewsSettingsPage::PreviewsSettingsPage(QWidget* parent) :
  49     SettingsPageBase(parent),
  50     m_initialized(false),
  51     m_previewPluginsList(0),
  52     m_enabledPreviewPlugins(),
  53     m_maxPreviewSize(0),
  54     m_spinBox(0),
  55     m_useFileThumbnails(0)
  56 {
  57     QVBoxLayout* topLayout = new QVBoxLayout(this);
  58     topLayout->setSpacing(KDialog::spacingHint());
  59     topLayout->setMargin(KDialog::marginHint());
  60
  61     QLabel* listDescription = new QLabel(i18nc("@label", "Show previews for:"), this);
  62
  63     m_previewPluginsList = new QListWidget(this);
  64     m_previewPluginsList->setSortingEnabled(true);
  65     m_previewPluginsList->setSelectionMode(QAbstractItemView::NoSelection);
  66     connect(m_previewPluginsList, SIGNAL(itemClicked(QListWidgetItem*)),
  67             this, SIGNAL(changed()));
  68
  69     KHBox* hBox = new KHBox(this);
  70     hBox->setSpacing(KDialog::spacingHint());
  71
  72     new QLabel(i18nc("@label:slider", "Maximum file size:"), hBox);
  73     m_maxPreviewSize = new QSlider(Qt::Horizontal, hBox);
  74     m_maxPreviewSize->setPageStep(10);
  75     m_maxPreviewSize->setSingleStep(1);
  76     m_maxPreviewSize->setTickPosition(QSlider::TicksBelow);
  77     m_maxPreviewSize->setRange(1, 100); /* MB */
  78
  79     m_spinBox = new QSpinBox(hBox);
  80     m_spinBox->setSingleStep(1);
  81     m_spinBox->setSuffix(" MB");
  82     m_spinBox->setRange(1, 100); /* MB */
  83
  84     connect(m_maxPreviewSize, SIGNAL(valueChanged(int)),
  85             m_spinBox, SLOT(setValue(int)));
  86     connect(m_spinBox, SIGNAL(valueChanged(int)),
  87             m_maxPreviewSize, SLOT(setValue(int)));
  88
  89     connect(m_maxPreviewSize, SIGNAL(valueChanged(int)),
  90             this, SIGNAL(changed()));
  91     connect(m_spinBox, SIGNAL(valueChanged(int)),
  92             this, SIGNAL(changed()));
  93
  94     m_useFileThumbnails = new QCheckBox(i18nc("@option:check", "Use thumbnails embedded in files"), this);
  95     connect(m_useFileThumbnails, SIGNAL(toggled(bool)), this, SIGNAL(changed()));
  96
  97     topLayout->addWidget(listDescription);
  98     topLayout->addWidget(m_previewPluginsList);
  99     topLayout->addWidget(hBox);
 100     topLayout->addWidget(m_useFileThumbnails);
 101
 102     loadSettings();
 103 }
 104
 105
 106 PreviewsSettingsPage::~PreviewsSettingsPage()
 107 {
 108 }
 109
 110 void PreviewsSettingsPage::applySettings()
 111 {
 112     m_enabledPreviewPlugins.clear();
 113     const int count = m_previewPluginsList->count();
 114     for (int i = 0; i < count; ++i) {
 115         const QListWidgetItem* item = m_previewPluginsList->item(i);
 116         if (item->checkState() == Qt::Checked) {
 117             const QString enabledPlugin = item->data(Qt::UserRole).toString();
 118             m_enabledPreviewPlugins.append(enabledPlugin);
 119         }
 120     }
 121
 122     KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
 123     globalConfig.writeEntry("Plugins", m_enabledPreviewPlugins);
 124
 125     const int byteCount = m_maxPreviewSize->value() * 1024 * 1024; // value() returns size in MB
 126     globalConfig.writeEntry("MaximumSize",
 127                             byteCount,
 128                             KConfigBase::Normal | KConfigBase::Global);
 129     globalConfig.writeEntry("UseFileThumbnails",
 130                             m_useFileThumbnails->isChecked(),
 131                             KConfigBase::Normal | KConfigBase::Global);
 132     globalConfig.sync();
 133 }
 134
 135 void PreviewsSettingsPage::restoreDefaults()
 136 {
 137     m_maxPreviewSize->setValue(MAX_PREVIEW_SIZE);
 138     m_useFileThumbnails->setChecked(USE_THUMBNAILS);
 139 }
 140
 141 bool PreviewsSettingsPage::event(QEvent* event)
 142 {
 143     if ((event->type() == QEvent::Polish) && !m_initialized) {
 144         // load all available plugins for previews
 145         const KService::List plugins = KServiceTypeTrader::self()->query("ThumbCreator");
 146         foreach (const KSharedPtr<KService> service, plugins) {
 147             QListWidgetItem* item = new QListWidgetItem(service->name(),
 148                                                         m_previewPluginsList);
 149             item->setData(Qt::UserRole, service->desktopEntryName());
 150             const bool show = m_enabledPreviewPlugins.contains(service->desktopEntryName());
 151             item->setCheckState(show ? Qt::Checked : Qt::Unchecked);
 152         }
 153
 154         m_initialized = true;
 155     }
 156     return SettingsPageBase::event(event);
 157 }
 158
 159 void PreviewsSettingsPage::loadSettings()
 160 {
 161     KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
 162     m_enabledPreviewPlugins = globalConfig.readEntry("Plugins", QStringList()
 163                                                                 << "directorythumbnail"
 164                                                                 << "imagethumbnail"
 165                                                                 << "jpegthumbnail");
 166
 167     // TODO: The default value of 5 MB must match with the default value inside
 168     // kdelibs/kio/kio/previewjob.cpp. Maybe a static getter method in PreviewJob
 169     // should be added for getting the default size?
 170     const int min = 1;   // MB
 171     const int max = 100; // MB
 172
 173     const int maxByteSize = globalConfig.readEntry("MaximumSize", MAX_PREVIEW_SIZE * 1024 * 1024);
 174     int maxMByteSize = maxByteSize / (1024 * 1024);
 175     if (maxMByteSize < min) {
 176         maxMByteSize = min;
 177     } else if (maxMByteSize > max) {
 178         maxMByteSize = max;
 179     }
 180     m_maxPreviewSize->setValue(maxMByteSize);
 181
 182     const bool useFileThumbnails = globalConfig.readEntry("UseFileThumbnails", USE_THUMBNAILS);
 183     m_useFileThumbnails->setChecked(useFileThumbnails);
 184 }
 185
 186 #include "previewssettingspage.moc"