path: root/archiveview.cpp

/*
  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version
  2 of the License, or (at your option) any later version.
*/

#include <QComboBox>
#include <QDialog>
#include <QHBoxLayout>
#include <QInputDialog>
#include <QLabel>
#include <QLineEdit>
#include <QMessageBox>
#include <QPushButton>
#include <QSettings>
#include <QSplitter>
#include <QVBoxLayout>
#include <QHeaderView>
#include <QSpinBox>
#include <QGroupBox>
#include <QTextEdit>
#include <QCompleter>
#include <QStandardItemModel>
#include <QFormLayout>

#include "archiveview.h"
#include "archivecontroller.h"
#include "mappingtablewidget.h"
#include "smglobals.h"
#include "helper.h"

ArchiveView::ArchiveView(QWidget *parent) : QWidget(parent) {
    QSettings s;
    mArchiveModel = static_cast<ArchiveModel*>(SmGlobals::instance()->model("ArchiveModel"));
    connect(mArchiveModel, SIGNAL(needRefresh()), this, SLOT(refreshArchive()));
    connect(mArchiveModel, SIGNAL(databaseError(QString)), this, SLOT(showDatabaseError(QString)));

    mProxy = new ArchiveProxy;
    mProxy->setSourceModel(mArchiveModel);
    mTree = new ArchiveTree;
    mTree->setModel(mProxy);
    mTree->setColumnHidden(ArchiveModel::GenericId, true);
    mTree->setColumnHidden(ArchiveModel::SeriesPartId, true);
    mTree->setColumnHidden(ArchiveModel::SeriesPart, true);
    mTree->setColumnHidden(ArchiveModel::Type, true);
    mTree->setColumnHidden(ArchiveModel::Favorite, true);
    mTree->setColumnHidden(ArchiveModel::Subtitle, true);
    mTree->setColumnHidden(ArchiveModel::Count, true);
    mTree->resizeColumnToContents(ArchiveModel::Name);
    mTree->setSortingEnabled(true);
    mTree->setEditTriggers(QAbstractItemView::NoEditTriggers);
    connect(mTree, SIGNAL(expanded(QModelIndex)), this, SLOT(expandItem(QModelIndex)));
    connect(mTree, SIGNAL(collapsed(QModelIndex)), this, SLOT(collapseItem(QModelIndex)));

    QString sortOrderName = s.value("archivemodel/sortorder", "Series Name").toString();
    mSortOrder = new QComboBox;
    mSortOrder->addItems(mArchiveModel->availableOrders());
    mSortOrder->setCurrentText(sortOrderName);
    // this is _not_ redundant! when sortOrderName is the first
    // item in the list, nothing will happen otherwise!
    mArchiveModel->setOrder(sortOrderName);
    connect(mSortOrder, SIGNAL(currentIndexChanged(QString)), mArchiveModel, SLOT(setOrder(QString)));
    connect(mArchiveModel, SIGNAL(modelReset()), this, SLOT(doSelection()));

    QLabel *l1 = new QLabel(tr("Filter"));
    mFilter = new QLineEdit;
    QString savedFilter = s.value("archivemodel/filter", QString()).toString();
    connect(mFilter, SIGNAL(returnPressed()), this, SLOT(setFilter()));
    QPushButton *filter = new QPushButton(tr("Filter"));
    connect(filter, SIGNAL(clicked()), this, SLOT(setFilter()));
    QPushButton *clear = new QPushButton(tr("Clear"));
    mFilter->setText(savedFilter);
    connect(clear, SIGNAL(clicked()), this, SLOT(clearFilter()));
    mProxy->setFilter(savedFilter, currentSortOrder());
    QHBoxLayout *filterLayout = new QHBoxLayout;
    filterLayout->addWidget(l1);
    filterLayout->addWidget(mFilter);
    filterLayout->addWidget(filter);
    filterLayout->addWidget(clear);
    QVBoxLayout *treeLayout = new QVBoxLayout;
    treeLayout->addWidget(mSortOrder);
    treeLayout->addLayout(filterLayout);
    treeLayout->addWidget(mTree);
    QWidget *treeWidget = new QWidget;
    treeWidget->setLayout(treeLayout);

    mFiles = new ArchiveFiles;
    mFiles->setItemDelegateForColumn(ArchiveFilesModel::FileType, new FileTypeDelegate(this));
    mFiles->setItemDelegateForColumn(ArchiveFilesModel::DvdNo, new DvdNoDelegate(this));
    mFiles->setItemDelegateForColumn(ArchiveFilesModel::Size, new SizeDelegate(this));
    mFiles->setItemDelegateForColumn(ArchiveFilesModel::SizeDur, new DurationDelegate(this));
    mFiles->setItemDelegateForColumn(ArchiveFilesModel::FileNumber, new EmptyDelegate(this));
    mFiles->setSelectionMode(QAbstractItemView::ExtendedSelection);
    mFiles->setSelectionBehavior(QAbstractItemView::SelectRows);
    mFilesModel = new ArchiveFilesModel(QStringList() << QChar(0x26A7) << tr("Seriespartid") << tr("Filename") << tr("Md5Sum") << tr("Size") << tr("Dvd") << tr("Type") << tr("No") << tr("Q") << tr("Fileid") << tr("S/Dur") << tr("Full Path"), this);
    mFilesProxy = new ArchiveFilesProxy;
    mFilesProxy->setSourceModel(mFilesModel);
    mFiles->setModel(mFilesProxy);

    QHBoxLayout *bottomRightLayout = new QHBoxLayout;
    mActorView = new SmTreeView;
    mActorView->setHeaderHidden(true);
    mActorModel = new QStandardItemModel(this);
    mActorView->setModel(mActorModel);
    QGroupBox *actorBox = new QGroupBox(tr("Actors"));
    QHBoxLayout *actorLayout = new QHBoxLayout;
    actorLayout->addWidget(mActorView);
    actorBox->setLayout(actorLayout);

    mGenreView = new SmTreeView;
    mGenreView->setHeaderHidden(true);
    mGenreModel = new QStandardItemModel(this);
    mGenreView->setModel(mGenreModel);
    QGroupBox *genreBox = new QGroupBox(tr("Genres"));
    QHBoxLayout *genreLayout = new QHBoxLayout;
    genreLayout->addWidget(mGenreView);
    genreBox->setLayout(genreLayout);

    mMetadataView = new QTextEdit;
    mMetadataView->setReadOnly(true);
    QGroupBox *metadataBox = new QGroupBox("Metadata");
    QHBoxLayout *metadataLayout = new QHBoxLayout;
    metadataLayout->addWidget(mMetadataView);
    metadataBox->setLayout(metadataLayout);

    bottomRightLayout->addWidget(actorBox);
    bottomRightLayout->addWidget(genreBox);
    bottomRightLayout->addWidget(metadataBox);
    QVBoxLayout *rightLayout = new QVBoxLayout;
    rightLayout->addWidget(mFiles);
    rightLayout->addLayout(bottomRightLayout);
    QWidget *rightWidget = new QWidget;
    rightLayout->setStretchFactor(mFiles, 3);
    rightWidget->setLayout(rightLayout);

    mTreeSplitter = new QSplitter(Qt::Horizontal);
    mTreeSplitter->addWidget(treeWidget);
    mTreeSplitter->addWidget(rightWidget);
    mTreeSplitter->setStretchFactor(0, 1);
    mTreeSplitter->setStretchFactor(1, 4);
    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addWidget(mTreeSplitter);

    setLayout(mainLayout);
    initController();
}

int ArchiveView::currentSortOrder() const {
    return mArchiveModel->availableOrdersHash().value(mSortOrder->currentText());
}

void ArchiveView::readSettings(){
    QSettings s;
    QVariantList list;
    list = s.value("archivemodel/expandedgenres").toList();
    mExpandedItems[ArchiveModel::Genre] = list;
    list = s.value("archivemodel/expandedactors").toList();
    mExpandedItems[ArchiveModel::Actor] = list;
    list = s.value("archivemodel/expandedseries").toList();
    mExpandedItems[ArchiveModel::SeriesName] = list;
    mCurrentArchivePath = s.value("archivemodel/selectedseries").toStringList();
    QByteArray splitterState = s.value("archivemodel/vsplitter").toByteArray();
    mTreeSplitter->restoreState(splitterState);
    doSelection();
    mFiles->readHeaderConfig();
    mFiles->setSortingEnabled(true);
}

void ArchiveView::writeSettings() {
    QSettings s;
    s.setValue("archivemodel/sortorder", mSortOrder->currentText());
    s.setValue("archivemodel/filter", mFilter->text());
    s.setValue("archivemodel/expandedgenres", mExpandedItems.value(ArchiveModel::Genre));
    s.setValue("archivemodel/expandedactors", mExpandedItems.value(ArchiveModel::Actor));
    s.setValue("archivemodel/expandedseries", mExpandedItems.value(ArchiveModel::SeriesName));
    s.setValue("archivemodel/selectedseries", mCurrentArchivePath);
    s.setValue("archivemodel/vsplitter", mTreeSplitter->saveState());
    mFiles->writeHeaderConfig();
}

void ArchiveView::refreshArchive(){
    writeSettings();
    mArchiveModel->refresh();
    doSelection();
}

void ArchiveView::doSelection(){
    QVariantList list = mExpandedItems.value(currentSortOrder());
    foreach(QVariant p, list){
        QStringList path = p.toStringList();
        QModelIndexList expand = mArchiveModel->pathToIndex(path);
        foreach(QModelIndex idx, expand){
            mTree->setExpanded(mProxy->mapFromSource(idx), true);
        }
    }
    if(!mCurrentArchivePath.isEmpty()){
        QModelIndexList l = mArchiveModel->pathToIndex(mCurrentArchivePath);
        if(!l.isEmpty()){
            QModelIndex sel = mProxy->mapFromSource(l.last());
            mTree->selectionModel()->select(sel, QItemSelectionModel::Rows | QItemSelectionModel::ClearAndSelect);
        }
    }
}

void ArchiveView::setFilter(){
    QString filter = mFilter->text();
    mProxy->setFilter(filter, currentSortOrder());
    mTree->expandAll();
}

void ArchiveView::clearFilter(){
    mFilter->clear();
    mProxy->setFilter(QString(), currentSortOrder());
    mTree->collapseAll();
}

void ArchiveView::showDatabaseError(const QString &errorMsg){
    QMessageBox::critical(this, tr("Database Error"), errorMsg);
}

void ArchiveView::expandItem(const QModelIndex &idx){
    QModelIndex realIdx = mProxy->mapToSource(idx);
    if(realIdx.isValid()){
        QStringList path = mArchiveModel->indexToPath(realIdx);
        QVariantList list = mExpandedItems.value(currentSortOrder());
        if(!list.contains(path)){
            list << mArchiveModel->indexToPath(realIdx);
        }
        mExpandedItems[currentSortOrder()] = list;
    }
}

void ArchiveView::collapseItem(const QModelIndex &idx){
    QModelIndex realIdx = mProxy->mapToSource(idx);
    if(realIdx.isValid()){
        QVariantList list = mExpandedItems.value(currentSortOrder());
        list.removeAll(mArchiveModel->indexToPath(realIdx));
        mExpandedItems[currentSortOrder()] = list;
    }
}

void ArchiveView::initController(){
    mController = new ArchiveController(this);
    mController->setArchiveView(this);
    mController->setArchiveTree(mTree, mProxy);
    mController->setArchiveFiles(mFiles, mFilesProxy);
    mController->setModels(mArchiveModel, mFilesModel);
    mController->setMappingModels(mActorModel, mGenreModel);
    mController->setMetadata(mMetadataView);
    mController->init();
    SmGlobals::instance()->setArchiveController(mController);
}

ArchiveTree::ArchiveTree(QWidget *parent) : SmTreeView(parent) {}

void ArchiveTree::setModel(ArchiveProxy *model){
    mProxy = model;
    mModel = qobject_cast<ArchiveModel*>(mProxy->sourceModel());
    QTreeView::setModel(model);
}

void ArchiveTree::rename(){
    QModelIndex idx = currentIndex();
    int nodeType = idx.data(ArchiveModel::TypeRole).toInt();
    if(nodeType == ArchiveModel::SeriesPartNode){
        impossible();
        return;
    }
    QString currentName = idx.data(ArchiveModel::NameRole).toString();
    QString question = QString(tr("Rename %1 to:")).arg(currentName);
    QString newName = QInputDialog::getText(this, tr("Rename"), question, QLineEdit::Normal, currentName);
    if(!newName.isEmpty()){
        QModelIndex realIdx = mProxy->mapToSource(idx);
        mModel->setData(realIdx, newName, Qt::EditRole);
    }
}

void ArchiveTree::remove(){
    QModelIndex idx = currentIndex();
    QModelIndex realIdx = mProxy->mapToSource(idx);
    QString warningMsg = QString("Really remove %1?").arg(idx.data().toString());
    int retval = QMessageBox::warning(this, tr("Question"), warningMsg, QMessageBox::Yes | QMessageBox::No);
    if(retval == QMessageBox::Yes){
        if(!mModel->removeNode(realIdx)){
            impossible();
        }
    }
}

void ArchiveTree::editActors(){
    MappingEditor e(tr("Actors"), this);
    QStringList actors = mModel->allActors();
    e.fillCompleter(actors);
    QModelIndex idx = currentIndex();
    int pId = idx.data(ArchiveModel::SeriesPartIdRole).toInt();
    QStringList curActors = mModel->actors(QSet<int>() << pId);
    e.setCurrentItems(curActors);
    int res = e.exec();
    if(res == QDialog::Accepted){
        QStringList selActors = e.items();
        mModel->setActors(pId, selActors);
        ArchiveController *c = SmGlobals::instance()->archiveController();
        c->treeSelectionChanged(QItemSelection(), QItemSelection());
    }
}

void ArchiveTree::editGenres(){
    MappingEditor e(tr("Genres"), this);
    QStringList genres = mModel->allGenres();
    e.fillCompleter(genres);
    QModelIndex idx = currentIndex();
    int pId = idx.data(ArchiveModel::SeriesPartIdRole).toInt();
    QStringList curGenres = mModel->genres(QSet<int>() << pId);
    e.setCurrentItems(curGenres);
    int res = e.exec();
    if(res == QDialog::Accepted){
        QStringList selGenres = e.items();
        mModel->setGenres(pId, selGenres);
        ArchiveController *c = SmGlobals::instance()->archiveController();
        c->treeSelectionChanged(QItemSelection(), QItemSelection());
    }
}

void ArchiveTree::editMetadata(){
    MetadataEditor e(this);
    ArchiveController *c = SmGlobals::instance()->archiveController();
    QStringList sources = c->archiveTreeModel()->allSources();
    e.setSources(sources);
    QStringList relGroups = c->archiveTreeModel()->allReleaseGroups();
    e.setReleaseGroups(relGroups);
    QModelIndex idx = currentIndex();
    int pId = idx.data(ArchiveModel::SeriesPartIdRole).toInt();
    QList<QVariant> curMetadata = c->archiveTreeModel()->metadataList(pId);
    e.setMetadata(curMetadata);
    int res = e.exec();
    if(res == QDialog::Accepted){
        QList<QVariant> data = e.metadata();
        mModel->setMetadata(pId, data);
        c->treeSelectionChanged(QItemSelection(), QItemSelection());
    }
}


void ArchiveTree::impossible(const QString msg){
    QMessageBox::critical(this, tr("Error"), msg);
}

ArchiveFiles::ArchiveFiles(const QString &headerSettings, QWidget *parent) : SmTreeView(headerSettings, parent){
    setEditTriggers(QAbstractItemView::NoEditTriggers);
}

ArchiveProxy::ArchiveProxy(QObject *parent) : QSortFilterProxyModel(parent) {}

void ArchiveProxy::setFilter(const QString &filter, int sortOrder){
    mFilter = QRegExp(filter);
    mSortOrder = sortOrder;
    invalidateFilter();
}

bool ArchiveProxy::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const {
    if(mFilter.isEmpty()){
        return true;
    }
    QModelIndex nameIdx = sourceModel()->index(sourceRow, ArchiveModel::Name, sourceParent);
    ArchiveModel *model = qobject_cast<ArchiveModel*>(sourceModel());
    return model->matchRecursive(nameIdx, mFilter);
}

ArchiveFilesProxy::ArchiveFilesProxy(QObject *parent) : QSortFilterProxyModel(parent) {}

/* Delegate for file type */

FileTypeDelegate::FileTypeDelegate(QObject *parent) : QStyledItemDelegate(parent){
    mFiletypeMap = SmGlobals::instance()->filetypeMap();
}

QString FileTypeDelegate::displayText(const QVariant &value, const QLocale &locale) const{
    Q_UNUSED(locale);
    int type = value.toInt();
    QString retval = mFiletypeMap.value(type);
    if(!retval.isEmpty()){
        return retval;
    }
    return tr("n/a");
}

QWidget *FileTypeDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{
    Q_UNUSED(option);
    Q_UNUSED(index);
    QComboBox *retval = new QComboBox(parent);
    retval->addItems(mFiletypeMap.values());
    return retval;
}

/* Mapping Editor */

MappingEditor::MappingEditor(const QString &caption, QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f) {
    mModel = new QStandardItemModel(this);
    mModel->setHorizontalHeaderLabels(QStringList() << caption);
    mProxy = new QSortFilterProxyModel(this);
    mProxy->setSourceModel(mModel);
    QVBoxLayout *viewLayout = new QVBoxLayout;
    mView = new SmTreeView;
    viewLayout->addWidget(mView);
    mView->setModel(mProxy);
    mView->setSortingEnabled(true);

    QHBoxLayout *editLayout = new QHBoxLayout;
    QLabel *l2 = new QLabel(tr("Add:"));
    mEditor = new QLineEdit;
    mCompleter = new QCompleter(this);
    mCompleterModel = new QStringListModel(this);
    mCompleter->setModel(mCompleterModel);
    mEditor->setCompleter(mCompleter);
    editLayout->addWidget(l2);
    editLayout->addWidget(mEditor);

    QHBoxLayout *editButtonLayout = new QHBoxLayout;
    mRemove = new QPushButton(tr("Remove"));
    connect(mRemove, SIGNAL(clicked()), this, SLOT(removeItem()));
    editButtonLayout->addWidget(mRemove);
    mAdd = new QPushButton(tr("Add"));
    connect(mAdd, SIGNAL(clicked()), this, SLOT(addItem()));
    editButtonLayout->addWidget(mAdd);

    QHBoxLayout *buttonLayout = new QHBoxLayout;
    buttonLayout->addStretch();
    mCancel = new QPushButton(tr("Cancel"));
    connect(mCancel, SIGNAL(clicked()), this, SLOT(reject()));
    buttonLayout->addWidget(mCancel);
    mAccept = new QPushButton(tr("Accept"));
    connect(mAccept, SIGNAL(clicked()), this, SLOT(accept()));
    buttonLayout->addWidget(mAccept);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addLayout(viewLayout);
    mainLayout->addLayout(editLayout);
    mainLayout->addLayout(editButtonLayout);
    mainLayout->addLayout(buttonLayout);
    setLayout(mainLayout);
    setMinimumWidth(400);
}

void MappingEditor::fillCompleter(const QStringList &completions){
    mCompleterModel->setStringList(completions);
}

void MappingEditor::setCurrentItems(const QStringList &items){
    foreach(QString i, items){
        QStandardItem *item = new QStandardItem(i);
        item->setIcon(QIcon(":/huge_bra.png"));
        mModel->appendRow(item);
    }
}

QStringList MappingEditor::items() const{
    QStringList retval;
    for(int i = 0; i < mModel->rowCount(); ++i){
        QStandardItem *item = mModel->item(i);
        retval << item->text();
    }
    return retval;
}

void MappingEditor::addItem(){
    QString itemName = mEditor->text();
    if(itemName.isEmpty()){
        return;
    }
    QList<QStandardItem*> found = mModel->findItems(itemName, Qt::MatchFixedString);
    if(found.size()){
        return;
    }
    QStandardItem *newItem = new QStandardItem(itemName);
    newItem->setIcon(QIcon(":/huge_bra.png"));
    mModel->appendRow(newItem);
    mEditor->clear();
}

void MappingEditor::removeItem(){
    QModelIndexList sel = mView->selectionModel()->selectedRows();
    if(sel.isEmpty()){
        return;
    }
    QModelIndex real = mProxy->mapToSource(sel.first());
    mModel->removeRow(real.row());
}

/* Metadata Editor */

MetadataEditor::MetadataEditor(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f){
    QLabel *captionL = new QLabel(tr("<b>Edit Metadata</b>"));

    QFormLayout *dataLayout = new QFormLayout;
    mReleaseYear = new QSpinBox;
    mReleaseYear->setMinimum(1900);
    mReleaseYear->setMaximum(3000);
    dataLayout->addRow(tr("&Release Year"), mReleaseYear);
    mSource = new QComboBox;
    mSource->setEditable(true);
    dataLayout->addRow(tr("&Source"), mSource);
    mRelGroup = new QComboBox;
    mRelGroup->setEditable(true);
    dataLayout->addRow(tr("Release &Group"), mRelGroup);
    mSubject = new QLineEdit;
    dataLayout->addRow(tr("Sub&ject"), mSubject);
    mEncoderOpts = new QLineEdit;
    dataLayout->addRow(tr("&Encoder Opts."), mEncoderOpts);
    mPasses = new QSpinBox;
    mPasses->setMinimum(0);
    mPasses->setMaximum(10);
    dataLayout->addRow(tr("&Passes"), mPasses);

    QVBoxLayout *commentLayout = new QVBoxLayout;
    QLabel *commentL = new QLabel(tr("<b>Comment</b>"));
    commentLayout->addWidget(commentL);
    mComment = new QTextEdit;
    commentLayout->addWidget(mComment);

    QHBoxLayout *buttonLayout = new QHBoxLayout;
    buttonLayout->addStretch();
    mCancel = new QPushButton(tr("Cancel"));
    connect(mCancel, SIGNAL(clicked()), this, SLOT(reject()));
    buttonLayout->addWidget(mCancel);
    mAccept = new QPushButton(tr("Accept"));
    connect(mAccept, SIGNAL(clicked()), this, SLOT(accept()));
    buttonLayout->addWidget(mAccept);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(captionL);
    mainLayout->addLayout(dataLayout);
    mainLayout->addLayout(commentLayout);
    mainLayout->addLayout(buttonLayout);
    setLayout(mainLayout);
    setMinimumWidth(400);
}

void MetadataEditor::setSources(const QStringList &sources){
    mSource->addItems(sources);
}

void MetadataEditor::setReleaseGroups(const QStringList &relGroups){
    mRelGroup->addItems(relGroups);
}

void MetadataEditor::setMetadata(const QList<QVariant> &data){
    mReleaseYear->setValue(data.at(ArchiveModel::ReleaseYear).toInt());
    mSource->setCurrentText(data.at(ArchiveModel::Source).toString());
    mSubject->setText(data.at(ArchiveModel::Subject).toString());
    mRelGroup->setCurrentText(data.at(ArchiveModel::ReleaseGroup).toString());
    mEncoderOpts->setText(data.at(ArchiveModel::EncoderOpts).toString());
    mPasses->setValue(data.at(ArchiveModel::Passes).toInt());
    mComment->setText(data.at(ArchiveModel::Comment).toString());
    mAdded = data.at(ArchiveModel::Added).toDate();
}

QList<QVariant> MetadataEditor::metadata() const{
    QList<QVariant> retval;
    for(int i = 0; i < ArchiveModel::MetadataNumFields; ++i){
        retval << QVariant();
    }
    retval[ArchiveModel::ReleaseYear] = mReleaseYear->value();
    retval[ArchiveModel::Source] = mSource->currentText();
    retval[ArchiveModel::Subject] = mSubject->text();
    retval[ArchiveModel::ReleaseGroup] = mRelGroup->currentText();
    retval[ArchiveModel::EncoderOpts] = mEncoderOpts->text();
    retval[ArchiveModel::Passes] = mPasses->value();
    retval[ArchiveModel::Comment] = mComment->toPlainText();
    retval[ArchiveModel::Added] = mAdded;
    return retval;
}

/* Delegate for File no. */

QString FileNoDelegate::displayText(const QVariant &value, const QLocale &locale) const{
    Q_UNUSED(locale);
    int no = value.toInt();
    if(no){
        return QString::number(no);
    }
    return QString();
}

QWidget *FileNoDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{
    Q_UNUSED(option);
    QSpinBox *retval = new QSpinBox(parent);
    int no = index.data().toInt();
    retval->setValue(no);
    return retval;
}

/* Delegate for Dvd no. */

QString DvdNoDelegate::displayText(const QVariant &value, const QLocale &locale) const{
    Q_UNUSED(locale);
    int no = value.toInt();
    if(no < 0){
        return tr("(local)");
    }
    QString retval = QString(tr("#%1")).arg(QString::number(no));
    return retval;
}

/* Delegate for size */

QString SizeDelegate::displayText(const QVariant &value, const QLocale &locale) const{
    // locale.toString() doesn't work, maybe b/c it's const
    Q_UNUSED(locale);
    QLocale l;
    return l.toString(value.toLongLong());
}

/* Delegate for duration */

QString DurationDelegate::displayText(const QVariant &value, const QLocale &locale) const{
    Q_UNUSED(locale);
    if(value.toString().contains("x")){
        return value.toString();
    }
    qint64 secs = value.toInt();
    if(secs == 0){
        return tr("n/a");
    }
    Helper::Duration dur(secs);
    return dur.toString();
}

/* Empty delegate */

QString EmptyDelegate::displayText(const QVariant &value, const QLocale &locale) const{
    int i = value.toInt();
    if(i < 1){
        return QString();
    }
    return QStyledItemDelegate::displayText(value, locale);
}