class SelectFormats(QDialog):
    def __init__(self,
                 fmt_count,
                 msg,
                 single=False,
                 parent=None,
                 exclude=False):
        QDialog.__init__(self, parent)
        self._l = QVBoxLayout(self)
        self.single_fmt = single
        self.setLayout(self._l)
        self.setWindowTitle(_('Choose formats'))
        self._m = QLabel(msg)
        self._m.setWordWrap(True)
        self._l.addWidget(self._m)
        self.formats = Formats(fmt_count)
        self.fview = QListView(self)
        self.fview.doubleClicked.connect(
            self.double_clicked, type=Qt.ConnectionType.QueuedConnection)
        if exclude:
            if QApplication.instance().is_dark_theme:
                sheet = 'background-color: #DAA520; color: black'
            else:
                sheet = 'background-color: #fae7b5'
            self.fview.setStyleSheet('QListView { %s }' % sheet)
        self._l.addWidget(self.fview)
        self.fview.setModel(self.formats)
        self.fview.setSelectionMode(
            QAbstractItemView.SelectionMode.SingleSelection
            if single else QAbstractItemView.SelectionMode.MultiSelection)
        self.bbox = \
        QDialogButtonBox(QDialogButtonBox.StandardButton.Ok|QDialogButtonBox.StandardButton.Cancel,
                Qt.Orientation.Horizontal, self)
        self._l.addWidget(self.bbox)
        self.bbox.accepted.connect(self.accept)
        self.bbox.rejected.connect(self.reject)
        self.fview.setIconSize(QSize(48, 48))
        self.fview.setSpacing(2)

        self.resize(350, 500)
        self.selected_formats = set()

    def accept(self, *args):
        for idx in self.fview.selectedIndexes():
            self.selected_formats.add(self.formats.fmt(idx))
        QDialog.accept(self, *args)

    def double_clicked(self, index):
        if self.single_fmt:
            self.accept()
class SelectNames(QDialog):  # {{{
    def __init__(self, names, txt, parent=None):
        QDialog.__init__(self, parent)
        self.l = l = QVBoxLayout(self)
        self.setLayout(l)

        self.la = la = QLabel(_('Create a Virtual library based on %s') % txt)
        l.addWidget(la)

        self.filter = f = QLineEdit(self)
        f.setPlaceholderText(_('Filter {}').format(txt))
        f.setClearButtonEnabled(True)
        l.addWidget(f)

        self.model = QStringListModel(sorted(names, key=sort_key))
        self.pmodel = QSortFilterProxyModel(self)
        self.pmodel.setFilterCaseSensitivity(
            Qt.CaseSensitivity.CaseInsensitive)
        f.textChanged.connect(self.pmodel.setFilterFixedString)
        self.pmodel.setSourceModel(self.model)
        self._names = QListView(self)
        self._names.setModel(self.pmodel)
        self._names.setSelectionMode(
            QAbstractItemView.SelectionMode.MultiSelection)
        l.addWidget(self._names)

        self._or = QRadioButton(_('Match any of the selected %s') % txt)
        self._and = QRadioButton(_('Match all of the selected %s') % txt)
        self._or.setChecked(True)
        l.addWidget(self._or)
        l.addWidget(self._and)

        self.bb = QDialogButtonBox(QDialogButtonBox.StandardButton.Ok
                                   | QDialogButtonBox.StandardButton.Cancel)
        self.bb.accepted.connect(self.accept)
        self.bb.rejected.connect(self.reject)
        l.addWidget(self.bb)

        self.resize(self.sizeHint())

    @property
    def names(self):
        for index in self._names.selectedIndexes():
            yield index.data(Qt.ItemDataRole.DisplayRole) or ''

    @property
    def match_type(self):
        return ' and ' if self._and.isChecked() else ' or '