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 <kconfiggroup.h>
  26 #include <kdialog.h>
  27 #include <kglobal.h>
  28 #include <khbox.h>
  29 #include <klocale.h>
  30 #include <KNumInput>
  31 #include <kservicetypetrader.h>
  32 #include <kservice.h>
  33
  34 #include <QCheckBox>
  35 #include <QGroupBox>
  36 #include <QLabel>
  37 #include <QListWidget>
  38 #include <QRadioButton>
  39 #include <QShowEvent>
  40 #include <QSlider>
  41 #include <QBoxLayout>
  42
  43 // default settings
  44 const bool USE_THUMBNAILS = true;
  45 const int MAX_PREVIEW_SIZE = 5; // 5 MB
  46
  47 PreviewsSettingsPage::PreviewsSettingsPage(QWidget* parent) :
  48     SettingsPageBase(parent),
  49     m_initialized(false),
  50     m_previewPluginsList(0),
  51     m_enabledPreviewPlugins(),
  52     m_maxPreviewSize(0),
  53     m_spinBox(0),
  54     m_useFileThumbnails(0)
  55 {
  56     QVBoxLayout* topLayout = new QVBoxLayout(this);
  57     topLayout->setSpacing(KDialog::spacingHint());
  58     topLayout->setMargin(KDialog::marginHint());
  59
  60     QLabel* listDescription = new QLabel(i18nc("@label", "Show previews for:"), this);
  61
  62     m_previewPluginsList = new QListWidget(this);
  63     m_previewPluginsList->setSortingEnabled(true);
  64     m_previewPluginsList->setSelectionMode(QAbstractItemView::NoSelection);
  65     connect(m_previewPluginsList, SIGNAL(itemClicked(QListWidgetItem*)),
  66             this, SIGNAL(changed()));
  67
  68     KHBox* hBox = new KHBox(this);
  69     hBox->setSpacing(KDialog::spacingHint());
  70
  71     new QLabel(i18nc("@label:slider", "Maximum file size:"), hBox);
  72     m_maxPreviewSize = new QSlider(Qt::Horizontal, hBox);
  73     m_maxPreviewSize->setPageStep(10);
  74     m_maxPreviewSize->setSingleStep(1);
  75     m_maxPreviewSize->setTickPosition(QSlider::TicksBelow);
  76     m_maxPreviewSize->setRange(1, 100); /* MB */
  77
  78     m_spinBox = new KIntSpinBox(hBox);
  79     m_spinBox->setSingleStep(1);
  80     m_spinBox->setSuffix(" MB");
  81     m_spinBox->setRange(1, 100); /* MB */
  82
  83     connect(m_maxPreviewSize, SIGNAL(valueChanged(int)),
  84             m_spinBox, SLOT(setValue(int)));
  85     connect(m_spinBox, SIGNAL(valueChanged(int)),
  86             m_maxPreviewSize, SLOT(setValue(int)));
  87
  88     connect(m_maxPreviewSize, SIGNAL(valueChanged(int)),
  89             this, SIGNAL(changed()));
  90     connect(m_spinBox, SIGNAL(valueChanged(int)),
  91             this, SIGNAL(changed()));
  92
  93     m_useFileThumbnails = new QCheckBox(i18nc("@option:check", "Use thumbnails embedded in files"), this);
  94     connect(m_useFileThumbnails, SIGNAL(toggled(bool)), this, SIGNAL(changed()));
  95
  96     topLayout->addWidget(listDescription);
  97     topLayout->addWidget(m_previewPluginsList);
  98     topLayout->addWidget(hBox);
  99     topLayout->addWidget(m_useFileThumbnails);
 100
 101     loadSettings();
 102 }
 103
 104
 105 PreviewsSettingsPage::~PreviewsSettingsPage()
 106 {
 107 }
 108
 109 void PreviewsSettingsPage::applySettings()
 110 {
 111     m_enabledPreviewPlugins.clear();
 112     const int count = m_previewPluginsList->count();
 113     for (int i = 0; i < count; ++i) {
 114         const QListWidgetItem* item = m_previewPluginsList->item(i);
 115         if (item->checkState() == Qt::Checked) {
 116             const QString enabledPlugin = item->data(Qt::UserRole).toString();
 117             m_enabledPreviewPlugins.append(enabledPlugin);
 118         }
 119     }
 120
 121     KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
 122     globalConfig.writeEntry("Plugins", m_enabledPreviewPlugins);
 123
 124     const int byteCount = m_maxPreviewSize->value() * 1024 * 1024; // value() returns size in MB
 125     globalConfig.writeEntry("MaximumSize",
 126                             byteCount,
 127                             KConfigBase::Normal | KConfigBase::Global);
 128     globalConfig.writeEntry("UseFileThumbnails",
 129                             m_useFileThumbnails->isChecked(),
 130                             KConfigBase::Normal | KConfigBase::Global);
 131     globalConfig.sync();
 132 }
 133
 134 void PreviewsSettingsPage::restoreDefaults()
 135 {
 136     m_maxPreviewSize->setValue(MAX_PREVIEW_SIZE);
 137     m_useFileThumbnails->setChecked(USE_THUMBNAILS);
 138 }
 139
 140 void PreviewsSettingsPage::showEvent(QShowEvent* event)
 141 {
 142     if (!event->spontaneous() && !m_initialized) {
 143         QMetaObject::invokeMethod(this, "loadPreviewPlugins", Qt::QueuedConnection);
 144         m_initialized = true;
 145     }
 146     SettingsPageBase::showEvent(event);
 147 }
 148
 149 void PreviewsSettingsPage::loadPreviewPlugins()
 150 {
 151     const KService::List plugins = KServiceTypeTrader::self()->query("ThumbCreator");
 152     foreach (const KSharedPtr<KService>& service, plugins) {
 153         QListWidgetItem* item = new QListWidgetItem(service->name(),
 154                                                     m_previewPluginsList);
 155         item->setData(Qt::UserRole, service->desktopEntryName());
 156         const bool show = m_enabledPreviewPlugins.contains(service->desktopEntryName());
 157         item->setCheckState(show ? Qt::Checked : Qt::Unchecked);
 158     }
 159 }
 160
 161 void PreviewsSettingsPage::loadSettings()
 162 {
 163     KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
 164     m_enabledPreviewPlugins = globalConfig.readEntry("Plugins", QStringList()
 165                                                                 << "directorythumbnail"
 166                                                                 << "imagethumbnail"
 167                                                                 << "jpegthumbnail");
 168
 169     // TODO: The default value of 5 MB must match with the default value inside
 170     // kdelibs/kio/kio/previewjob.cpp. Maybe a static getter method in PreviewJob
 171     // should be added for getting the default size?
 172     const int min = 1;   // MB
 173     const int max = 100; // MB
 174
 175     const int maxByteSize = globalConfig.readEntry("MaximumSize", MAX_PREVIEW_SIZE * 1024 * 1024);
 176     int maxMByteSize = maxByteSize / (1024 * 1024);
 177     if (maxMByteSize < min) {
 178         maxMByteSize = min;
 179     } else if (maxMByteSize > max) {
 180         maxMByteSize = max;
 181     }
 182     m_maxPreviewSize->setValue(maxMByteSize);
 183
 184     const bool useFileThumbnails = globalConfig.readEntry("UseFileThumbnails", USE_THUMBNAILS);
 185     m_useFileThumbnails->setChecked(useFileThumbnails);
 186 }
 187
 188 #include "previewssettingspage.moc"