Python Qt.QToolButton类代码示例

    def _init_controls(self):
        # Add the control set
        vbl = QVBoxLayout()
        self.move_rule_up_tb = QToolButton()
        self.move_rule_up_tb.setObjectName("move_rule_up_tb")
        self.move_rule_up_tb.setToolTip('Move rule up')
        self.move_rule_up_tb.setIcon(QIcon(I('arrow-up.png')))
        self.move_rule_up_tb.clicked.connect(self.move_row_up)
        vbl.addWidget(self.move_rule_up_tb)

        self.add_rule_tb = QToolButton()
        self.add_rule_tb.setObjectName("add_rule_tb")
        self.add_rule_tb.setToolTip('Add a new rule')
        self.add_rule_tb.setIcon(QIcon(I('plus.png')))
        self.add_rule_tb.clicked.connect(self.add_row)
        vbl.addWidget(self.add_rule_tb)

        self.delete_rule_tb = QToolButton()
        self.delete_rule_tb.setObjectName("delete_rule_tb")
        self.delete_rule_tb.setToolTip('Delete selected rule')
        self.delete_rule_tb.setIcon(QIcon(I('list_remove.png')))
        self.delete_rule_tb.clicked.connect(self.delete_row)
        vbl.addWidget(self.delete_rule_tb)

        self.move_rule_down_tb = QToolButton()
        self.move_rule_down_tb.setObjectName("move_rule_down_tb")
        self.move_rule_down_tb.setToolTip('Move rule down')
        self.move_rule_down_tb.setIcon(QIcon(I('arrow-down.png')))
        self.move_rule_down_tb.clicked.connect(self.move_row_down)
        vbl.addWidget(self.move_rule_down_tb)

        self.layout.addLayout(vbl)

    def _init_controls(self):
        # Add the control set
        vbl = QVBoxLayout()
        self.move_element_up_tb = QToolButton()
        self.move_element_up_tb.setObjectName("move_element_up_tb")
        self.move_element_up_tb.setToolTip('Move element up')
        self.move_element_up_tb.setIcon(QIcon(I('arrow-up.png')))
        self.move_element_up_tb.clicked.connect(self.move_row_up)
        vbl.addWidget(self.move_element_up_tb)

        self.undo_css_tb = QToolButton()
        self.undo_css_tb.setObjectName("undo_css_tb")
        self.undo_css_tb.setToolTip('Restore CSS to last saved')
        self.undo_css_tb.setIcon(QIcon(I('edit-undo.png')))
        self.undo_css_tb.clicked.connect(partial(self.undo_reset_button_clicked, 'undo'))
        vbl.addWidget(self.undo_css_tb)

        self.reset_css_tb = QToolButton()
        self.reset_css_tb.setObjectName("reset_css_tb")
        self.reset_css_tb.setToolTip('Reset CSS to default')
        self.reset_css_tb.setIcon(QIcon(I('trash.png')))
        self.reset_css_tb.clicked.connect(partial(self.undo_reset_button_clicked, 'reset'))
        vbl.addWidget(self.reset_css_tb)

        self.move_element_down_tb = QToolButton()
        self.move_element_down_tb.setObjectName("move_element_down_tb")
        self.move_element_down_tb.setToolTip('Move element down')
        self.move_element_down_tb.setIcon(QIcon(I('arrow-down.png')))
        self.move_element_down_tb.clicked.connect(self.move_row_down)
        vbl.addWidget(self.move_element_down_tb)

        self.layout.addLayout(vbl)

 def __init__(self, parent, label, filename=None, dialog_label=None, file_types=None, default_suffix=None,
              file_mode=QFileDialog.AnyFile):
     QWidget.__init__(self, parent)
     lo = QHBoxLayout(self)
     lo.setContentsMargins(0, 0, 0, 0)
     lo.setSpacing(5)
     # label
     lab = QLabel(label, self)
     lo.addWidget(lab, 0)
     # text field
     self.wfname = QLineEdit(self)
     self.wfname.setReadOnly(True)
     self.setFilename(filename)
     lo.addWidget(self.wfname, 1)
     # selector
     wsel = QToolButton(self)
     wsel.setText("Choose...")
     QObject.connect(wsel, SIGNAL("clicked()"), self._chooseFile)
     lo.addWidget(wsel, 0)
     # other init
     self._file_dialog = None
     self._dialog_label = dialog_label or label
     self._file_types = file_types or "All files (*)"
     self._file_mode = file_mode
     self._default_suffix = default_suffix
     self._dir = None

    def __init__(self, parent, db, author, series=None):
        QDialog.__init__(self, parent)
        self.db = db

        self.setWindowTitle(_('How many empty books?'))

        self._layout = QGridLayout(self)
        self.setLayout(self._layout)

        self.qty_label = QLabel(_('How many empty books should be added?'))
        self._layout.addWidget(self.qty_label, 0, 0, 1, 2)

        self.qty_spinbox = QSpinBox(self)
        self.qty_spinbox.setRange(1, 10000)
        self.qty_spinbox.setValue(1)
        self._layout.addWidget(self.qty_spinbox, 1, 0, 1, 2)

        self.author_label = QLabel(_('Set the author of the new books to:'))
        self._layout.addWidget(self.author_label, 2, 0, 1, 2)

        self.authors_combo = EditWithComplete(self)
        self.authors_combo.setSizeAdjustPolicy(
                self.authors_combo.AdjustToMinimumContentsLengthWithIcon)
        self.authors_combo.setEditable(True)
        self._layout.addWidget(self.authors_combo, 3, 0, 1, 1)
        self.initialize_authors(db, author)

        self.clear_button = QToolButton(self)
        self.clear_button.setIcon(QIcon(I('trash.png')))
        self.clear_button.setToolTip(_('Reset author to Unknown'))
        self.clear_button.clicked.connect(self.reset_author)
        self._layout.addWidget(self.clear_button, 3, 1, 1, 1)

        self.series_label = QLabel(_('Set the series of the new books to:'))
        self._layout.addWidget(self.series_label, 4, 0, 1, 2)

        self.series_combo = EditWithComplete(self)
        self.authors_combo.setSizeAdjustPolicy(
                self.authors_combo.AdjustToMinimumContentsLengthWithIcon)
        self.series_combo.setEditable(True)
        self._layout.addWidget(self.series_combo, 5, 0, 1, 1)
        self.initialize_series(db, series)

        self.sclear_button = QToolButton(self)
        self.sclear_button.setIcon(QIcon(I('trash.png')))
        self.sclear_button.setToolTip(_('Reset series'))
        self.sclear_button.clicked.connect(self.reset_series)
        self._layout.addWidget(self.sclear_button, 5, 1, 1, 1)

        self.create_epub = c = QCheckBox(_('Create an empty EPUB file as well'))
        c.setChecked(gprefs.get('create_empty_epub_file', False))
        c.setToolTip(_('Also create an empty EPUB file that you can subsequently edit'))
        self._layout.addWidget(c, 6, 0, 1, -1)

        button_box = self.bb = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
        button_box.accepted.connect(self.accept)
        button_box.rejected.connect(self.reject)
        self._layout.addWidget(button_box, 7, 0, 1, -1)
        self.resize(self.sizeHint())

    class SliderControl(QObject):
        """This class implements a slider control for a colormap"""

        def __init__(self, name, value, minval, maxval, step, format="%s: %.1f"):
            QObject.__init__(self)
            self.name, self.value, self.minval, self.maxval, self.step, self.format = \
                name, value, minval, maxval, step, format
            self._default = value
            self._wlabel = None

        def makeControlWidgets(self, parent, gridlayout, row, column):
            toprow = QWidget(parent)
            gridlayout.addWidget(toprow, row * 2, column)
            top_lo = QHBoxLayout(toprow)
            top_lo.setContentsMargins(0, 0, 0, 0)
            self._wlabel = QLabel(self.format % (self.name, self.value), toprow)
            top_lo.addWidget(self._wlabel)
            self._wreset = QToolButton(toprow)
            self._wreset.setText("reset")
            self._wreset.setToolButtonStyle(Qt.ToolButtonTextOnly)
            self._wreset.setAutoRaise(True)
            self._wreset.setEnabled(self.value != self._default)
            QObject.connect(self._wreset, SIGNAL("clicked()"), self._resetValue)
            top_lo.addWidget(self._wreset)
            self._wslider = QwtSlider(parent)
            # This works around a stupid bug in QwtSliders -- see comments on histogram zoom wheel above
            self._wslider_timer = QTimer(parent)
            self._wslider_timer.setSingleShot(True)
            self._wslider_timer.setInterval(500)
            QObject.connect(self._wslider_timer, SIGNAL("timeout()"), self.setValue)
            gridlayout.addWidget(self._wslider, row * 2 + 1, column)
            self._wslider.setRange(self.minval, self.maxval)
            self._wslider.setStep(self.step)
            self._wslider.setValue(self.value)
            self._wslider.setTracking(False)
            QObject.connect(self._wslider, SIGNAL("valueChanged(double)"), self.setValue)
            QObject.connect(self._wslider, SIGNAL("sliderMoved(double)"), self._previewValue)

        def _resetValue(self):
            self._wslider.setValue(self._default)
            self.setValue(self._default)

        def setValue(self, value=None, notify=True):
            # only update widgets if already created
            self.value = value
            if self._wlabel is not None:
                if value is None:
                    self.value = value = self._wslider.value()
                self._wreset.setEnabled(value != self._default)
                self._wlabel.setText(self.format % (self.name, self.value))
                # stop timer if being called to finalize the change in value
                if notify:
                    self._wslider_timer.stop()
                    self.emit(SIGNAL("valueChanged"), self.value)

        def _previewValue(self, value):
            self.setValue(notify=False)
            self._wslider_timer.start(500)
            self.emit(SIGNAL("valueMoved"), self.value)

 def __init__(self, *args):
     QToolButton.__init__(self, *args)
     self.animation = QPropertyAnimation(self, 'iconSize', self)
     self.animation.setDuration(60/72.*1000)
     self.animation.setLoopCount(4)
     self.normal_icon_size = QSize(64, 64)
     self.animation.valueChanged.connect(self.value_changed)
     self.setCursor(Qt.PointingHandCursor)
     self.animation.finished.connect(self.animation_finished)

class DateEdit(QDateTimeEdit):

    TOOLTIP = ''
    LABEL = _('&Date:')
    FMT = 'dd MMM yyyy hh:mm:ss'
    ATTR = 'timestamp'
    TWEAK = 'gui_timestamp_display_format'

    def __init__(self, parent):
        QDateTimeEdit.__init__(self, parent)
        self.setToolTip(self.TOOLTIP)
        self.setWhatsThis(self.TOOLTIP)
        fmt = tweaks[self.TWEAK]
        if fmt is None:
            fmt = self.FMT
        self.setDisplayFormat(fmt)
        self.setCalendarPopup(True)
        self.cw = CalendarWidget(self)
        self.cw.setVerticalHeaderFormat(self.cw.NoVerticalHeader)
        self.setCalendarWidget(self.cw)
        self.setMinimumDateTime(UNDEFINED_QDATETIME)
        self.setSpecialValueText(_('Undefined'))
        self.clear_button = QToolButton(parent)
        self.clear_button.setIcon(QIcon(I('trash.png')))
        self.clear_button.setToolTip(_('Clear date'))
        self.clear_button.clicked.connect(self.reset_date)

    def reset_date(self, *args):
        self.current_val = None

    @dynamic_property
    def current_val(self):
        def fget(self):
            return qt_to_dt(self.dateTime(), as_utc=False)
        def fset(self, val):
            if val is None:
                val = UNDEFINED_DATE
            else:
                val = as_local_time(val)
            self.setDateTime(val)
        return property(fget=fget, fset=fset)

    def initialize(self, db, id_):
        self.current_val = getattr(db, self.ATTR)(id_, index_is_id=True)
        self.original_val = self.current_val

    def commit(self, db, id_):
        if self.changed:
            getattr(db, 'set_'+self.ATTR)(id_, self.current_val, commit=False,
                notify=False)
        return True

    @property
    def changed(self):
        o, c = self.original_val, self.current_val
        return o != c

 def create_color_button(key, text):
     b = ColorButton(data, key, text, self)
     b.changed.connect(self.changed), l.addWidget(b)
     bc = QToolButton(self)
     bc.setIcon(QIcon(I('clear_left.png')))
     bc.setToolTip(_('Remove color'))
     bc.clicked.connect(b.clear)
     h = QHBoxLayout()
     h.addWidget(b), h.addWidget(bc)
     return h

class MovedDialog(QDialog):  # {{{
    def __init__(self, stats, location, parent=None):
        QDialog.__init__(self, parent)
        self.setWindowTitle(_("No library found"))
        self._l = l = QGridLayout(self)
        self.setLayout(l)
        self.stats, self.location = stats, location

        loc = self.oldloc = location.replace("/", os.sep)
        self.header = QLabel(
            _(
                "No existing calibre library was found at %s. "
                "If the library was moved, select its new location below. "
                "Otherwise calibre will forget this library."
            )
            % loc
        )
        self.header.setWordWrap(True)
        ncols = 2
        l.addWidget(self.header, 0, 0, 1, ncols)
        self.cl = QLabel("<br><b>" + _("New location of this library:"))
        l.addWidget(self.cl, 1, 0, 1, ncols)
        self.loc = QLineEdit(loc, self)
        l.addWidget(self.loc, 2, 0, 1, 1)
        self.cd = QToolButton(self)
        self.cd.setIcon(QIcon(I("document_open.png")))
        self.cd.clicked.connect(self.choose_dir)
        l.addWidget(self.cd, 2, 1, 1, 1)
        self.bb = QDialogButtonBox(QDialogButtonBox.Abort)
        b = self.bb.addButton(_("Library moved"), self.bb.AcceptRole)
        b.setIcon(QIcon(I("ok.png")))
        b = self.bb.addButton(_("Forget library"), self.bb.RejectRole)
        b.setIcon(QIcon(I("edit-clear.png")))
        b.clicked.connect(self.forget_library)
        self.bb.accepted.connect(self.accept)
        self.bb.rejected.connect(self.reject)
        l.addWidget(self.bb, 3, 0, 1, ncols)
        self.resize(self.sizeHint() + QSize(100, 50))

    def choose_dir(self):
        d = choose_dir(self, "library moved choose new loc", _("New library location"), default_dir=self.oldloc)
        if d is not None:
            self.loc.setText(d)

    def forget_library(self):
        self.stats.remove(self.location)

    def accept(self):
        newloc = unicode(self.loc.text())
        if not db_class.exists_at(newloc):
            error_dialog(self, _("No library found"), _("No existing calibre library found at %s") % newloc, show=True)
            return
        self.stats.rename(self.location, newloc)
        self.newloc = newloc
        QDialog.accept(self)

class MovedDialog(QDialog): # {{{

    def __init__(self, stats, location, parent=None):
        QDialog.__init__(self, parent)
        self.setWindowTitle(_('No library found'))
        self._l = l = QGridLayout(self)
        self.setLayout(l)
        self.stats, self.location = stats, location

        loc = self.oldloc = location.replace('/', os.sep)
        self.header = QLabel(_('No existing calibre library was found at %s. '
            'If the library was moved, select its new location below. '
            'Otherwise calibre will forget this library.')%loc)
        self.header.setWordWrap(True)
        ncols = 2
        l.addWidget(self.header, 0, 0, 1, ncols)
        self.cl = QLabel('<br><b>'+_('New location of this library:'))
        l.addWidget(self.cl, 1, 0, 1, ncols)
        self.loc = QLineEdit(loc, self)
        l.addWidget(self.loc, 2, 0, 1, 1)
        self.cd = QToolButton(self)
        self.cd.setIcon(QIcon(I('document_open.png')))
        self.cd.clicked.connect(self.choose_dir)
        l.addWidget(self.cd, 2, 1, 1, 1)
        self.bb = QDialogButtonBox(self)
        b = self.bb.addButton(_('Library moved'), self.bb.AcceptRole)
        b.setIcon(QIcon(I('ok.png')))
        b = self.bb.addButton(_('Forget library'), self.bb.RejectRole)
        b.setIcon(QIcon(I('edit-clear.png')))
        self.bb.accepted.connect(self.accept)
        self.bb.rejected.connect(self.reject)
        l.addWidget(self.bb, 3, 0, 1, ncols)
        self.resize(self.sizeHint() + QSize(100, 50))

    def choose_dir(self):
        d = choose_dir(self, 'library moved choose new loc',
                _('New library location'), default_dir=self.oldloc)
        if d is not None:
            self.loc.setText(d)

    def reject(self):
        self.stats.remove(self.location)
        QDialog.reject(self)

    def accept(self):
        newloc = unicode(self.loc.text())
        if not LibraryDatabase2.exists_at(newloc):
            error_dialog(self, _('No library found'),
                    _('No existing calibre library found at %s')%newloc,
                    show=True)
            return
        self.stats.rename(self.location, newloc)
        self.newloc = newloc
        QDialog.accept(self)

    def __init__(self, current_family, parent=None):
        QDialog.__init__(self, parent)
        self.setWindowTitle(_('Choose font family'))
        self.setWindowIcon(QIcon(I('font.png')))
        from calibre.utils.fonts.scanner import font_scanner
        self.font_scanner = font_scanner

        self.m = QStringListModel(self)
        self.build_font_list()
        self.l = l = QGridLayout()
        self.setLayout(l)
        self.view = FontsView(self)
        self.view.setModel(self.m)
        self.view.setCurrentIndex(self.m.index(0))
        if current_family:
            for i, val in enumerate(self.families):
                if icu_lower(val) == icu_lower(current_family):
                    self.view.setCurrentIndex(self.m.index(i))
                    break
        self.view.doubleClicked.connect(self.accept, type=Qt.QueuedConnection)
        self.view.changed.connect(self.current_changed,
                type=Qt.QueuedConnection)
        self.faces = Typefaces(self)
        self.bb = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Cancel)
        self.bb.accepted.connect(self.accept)
        self.bb.rejected.connect(self.reject)
        self.add_fonts_button = afb = self.bb.addButton(_('Add &fonts'),
                self.bb.ActionRole)
        afb.setIcon(QIcon(I('plus.png')))
        afb.clicked.connect(self.add_fonts)
        self.ml = QLabel(_('Choose a font family from the list below:'))
        self.search = QLineEdit(self)
        self.search.setPlaceholderText(_('Search'))
        self.search.returnPressed.connect(self.find)
        self.nb = QToolButton(self)
        self.nb.setIcon(QIcon(I('arrow-down.png')))
        self.nb.setToolTip(_('Find Next'))
        self.pb = QToolButton(self)
        self.pb.setIcon(QIcon(I('arrow-up.png')))
        self.pb.setToolTip(_('Find Previous'))
        self.nb.clicked.connect(self.find_next)
        self.pb.clicked.connect(self.find_previous)

        l.addWidget(self.ml, 0, 0, 1, 4)
        l.addWidget(self.search, 1, 0, 1, 1)
        l.addWidget(self.nb, 1, 1, 1, 1)
        l.addWidget(self.pb, 1, 2, 1, 1)
        l.addWidget(self.view, 2, 0, 1, 3)
        l.addWidget(self.faces, 1, 3, 2, 1)
        l.addWidget(self.bb, 3, 0, 1, 4)
        l.setAlignment(self.faces, Qt.AlignTop)

        self.resize(800, 600)

    def __init__(self, icon, text, splitter, parent=None, shortcut=None):
        QToolButton.__init__(self, parent)
        self.label = text
        self.setIcon(QIcon(icon))
        self.setCheckable(True)

        self.splitter = splitter
        splitter.state_changed.connect(self.update_state)
        self.setCursor(Qt.PointingHandCursor)
        self.shortcut = ''
        if shortcut:
            self.shortcut = shortcut

    def __init__(self, parent, copy_fmt):
        QWidget.__init__(self, parent)
        self.dialog = parent
        self.copy_fmt = copy_fmt
        self.changed = False

        self.l = l = QGridLayout()
        self.setLayout(l)
        self.cover_from_format_button = QToolButton(self)
        self.cover_from_format_button.setToolTip(
                _('Set the cover for the book from the selected format'))
        self.cover_from_format_button.setIcon(QIcon(I('book.png')))
        self.cover_from_format_button.setIconSize(QSize(32, 32))

        self.metadata_from_format_button = QToolButton(self)
        self.metadata_from_format_button.setIcon(QIcon(I('edit_input.png')))
        self.metadata_from_format_button.setIconSize(QSize(32, 32))
        self.metadata_from_format_button.setToolTip(
                _('Set metadata for the book from the selected format'))

        self.add_format_button = QToolButton(self)
        self.add_format_button.setIcon(QIcon(I('add_book.png')))
        self.add_format_button.setIconSize(QSize(32, 32))
        self.add_format_button.clicked.connect(self.add_format)
        self.add_format_button.setToolTip(
                _('Add a format to this book'))

        self.remove_format_button = QToolButton(self)
        self.remove_format_button.setIcon(QIcon(I('trash.png')))
        self.remove_format_button.setIconSize(QSize(32, 32))
        self.remove_format_button.clicked.connect(self.remove_format)
        self.remove_format_button.setToolTip(
                _('Remove the selected format from this book'))

        self.formats = FormatList(self)
        self.formats.setAcceptDrops(True)
        self.formats.formats_dropped.connect(self.formats_dropped)
        self.formats.restore_fmt.connect(self.restore_fmt)
        self.formats.delete_format.connect(self.remove_format)
        self.formats.itemDoubleClicked.connect(self.show_format)
        self.formats.setDragDropMode(self.formats.DropOnly)
        self.formats.setIconSize(QSize(32, 32))
        self.formats.setMaximumWidth(200)

        l.addWidget(self.cover_from_format_button,    0, 0, 1, 1)
        l.addWidget(self.metadata_from_format_button, 2, 0, 1, 1)
        l.addWidget(self.add_format_button,           0, 2, 1, 1)
        l.addWidget(self.remove_format_button,        2, 2, 1, 1)
        l.addWidget(self.formats,                     0, 1, 3, 1)

        self.temp_files = []

class MultipleWidget(QWidget):

    def __init__(self, parent):
        QWidget.__init__(self, parent)
        layout = QHBoxLayout()
        layout.setSpacing(5)
        layout.setContentsMargins(0, 0, 0, 0)

        self.tags_box = EditWithComplete(parent)
        layout.addWidget(self.tags_box, stretch=1000)
        self.editor_button = QToolButton(self)
        self.editor_button.setToolTip(_('Open Item Editor'))
        self.editor_button.setIcon(QIcon(I('chapters.png')))
        layout.addWidget(self.editor_button)
        self.setLayout(layout)

    def get_editor_button(self):
        return self.editor_button

    def update_items_cache(self, values):
        self.tags_box.update_items_cache(values)

    def clear(self):
        self.tags_box.clear()

    def setEditText(self):
        self.tags_box.setEditText()

    def addItem(self, itm):
        self.tags_box.addItem(itm)

    def set_separator(self, sep):
        self.tags_box.set_separator(sep)

    def set_add_separator(self, sep):
        self.tags_box.set_add_separator(sep)

    def set_space_before_sep(self, v):
        self.tags_box.set_space_before_sep(v)

    def setSizePolicy(self, v1, v2):
        self.tags_box.setSizePolicy(v1, v2)

    def setText(self, v):
        self.tags_box.setText(v)

    def text(self):
        return self.tags_box.text()

 def makeControlWidgets(self, parent, gridlayout, row, column):
     toprow = QWidget(parent)
     gridlayout.addWidget(toprow, row * 2, column)
     top_lo = QHBoxLayout(toprow)
     top_lo.setContentsMargins(0, 0, 0, 0)
     self._wlabel = QLabel(self.format % (self.name, self.value), toprow)
     top_lo.addWidget(self._wlabel)
     self._wreset = QToolButton(toprow)
     self._wreset.setText("reset")
     self._wreset.setToolButtonStyle(Qt.ToolButtonTextOnly)
     self._wreset.setAutoRaise(True)
     self._wreset.setEnabled(self.value != self._default)
     QObject.connect(self._wreset, SIGNAL("clicked()"), self._resetValue)
     top_lo.addWidget(self._wreset)
     self._wslider = QwtSlider(parent)
     # This works around a stupid bug in QwtSliders -- see comments on histogram zoom wheel above
     self._wslider_timer = QTimer(parent)
     self._wslider_timer.setSingleShot(True)
     self._wslider_timer.setInterval(500)
     QObject.connect(self._wslider_timer, SIGNAL("timeout()"), self.setValue)
     gridlayout.addWidget(self._wslider, row * 2 + 1, column)
     self._wslider.setRange(self.minval, self.maxval)
     self._wslider.setStep(self.step)
     self._wslider.setValue(self.value)
     self._wslider.setTracking(False)
     QObject.connect(self._wslider, SIGNAL("valueChanged(double)"), self.setValue)
     QObject.connect(self._wslider, SIGNAL("sliderMoved(double)"), self._previewValue)