How to use the taurus.external.qt.Qt.Qt function in taurus

self._execFileButton.setIcon(Qt.QIcon.fromTheme("folder-open"))
        self._execFileButton.setToolTip("Browse...")
        self._execFileButton.setMaximumSize(80, 25)
        self._layout1.addWidget(self._execFileLabel, 2, 0, Qt.Qt.AlignRight)
        self._layout1.addWidget(self._execFileLineEdit, 2, 1, Qt.Qt.AlignRight)
        self._layout1.addWidget(self._execFileButton, 2, 2, Qt.Qt.AlignLeft)
        self._paramsLabel = Qt.QLabel("Parameters:")
        self._paramsLineEdit = Qt.QLineEdit()
        self._paramsLineEdit.setMinimumSize(150, 25)
        self._layout1.addWidget(self._paramsLabel, 3, 0, Qt.Qt.AlignRight)
        self._layout1.addWidget(self._paramsLineEdit, 3, 1, Qt.Qt.AlignRight)
        self._textLabel = Qt.QLabel("Text:")
        self._textLineEdit = Qt.QLineEdit()
        self._textLineEdit.setMinimumSize(150, 25)
        self._layout1.addWidget(self._textLabel, 4, 0, Qt.Qt.AlignRight)
        self._layout1.addWidget(self._textLineEdit, 4, 1, Qt.Qt.AlignRight)

        self._iconLabel = Qt.QLabel("Icon:")
        self._iconLogo = Qt.QPushButton()
        self._iconLogo.setIcon(Qt.QIcon("status:image-missing.svg"))
        self._iconLogo.setIconSize(Qt.QSize(60, 60))
        self._layout1.addWidget(self._iconLabel, 5, 0, Qt.Qt.AlignRight)
        self._layout1.addWidget(self._iconLogo, 5, 1, Qt.Qt.AlignCenter)
        self._spacerItem1 = Qt.QSpacerItem(
            10, 0, Qt.QSizePolicy.Fixed, Qt.QSizePolicy.Expanding)
        self._layout1.addItem(self._spacerItem1, 8, 0, 1, 1, Qt.Qt.AlignCenter)

        # connections
        self._execFileButton.clicked.connect(self._selectExecFile)
        self._execFileLineEdit.textChanged.connect(self._setDefaultText)
        self._iconLogo.clicked.connect(self._selectIcon)
        self._dlgBox.accepted.connect(self.accept)

self.layout().addWidget(self._splitter, 0, 0)
        self._header = Qt.QFrame()
        self._header.setFixedHeight(1.1 * IMAGE_SIZE[1])
        self._header.setLayout(Qt.QGridLayout())

        self._dup = Qt.QPushButton()
        qpixmap = Qt.QIcon("actions:window-new.svg")
        self._dup.setIcon(Qt.QIcon(qpixmap))
        self._dup.setIconSize(Qt.QSize(15, 15))
        self._dup.pressed.connect(self.duplicate)

        self._image = Qt.QLabel()

        self._header.layout().addWidget(self._image, 0, 0, 2, 1, Qt.Qt.AlignCenter)
        self._header.layout().addWidget(self._label, 0, 1, Qt.Qt.AlignLeft)
        self._header.layout().addWidget(self._stateframe, 1, 1, 1, 2, Qt.Qt.AlignLeft)
        self._header.layout().addWidget(self._dup, 0, 2, Qt.Qt.AlignRight)

        self._splitter.insertWidget(0, self._header)
        self._splitter.insertWidget(1, self._attrsframe)
        self._splitter.insertWidget(2, self._statusframe)
        self._splitter.setSizes(SPLIT_SIZES)
        [self._splitter.setStretchFactor(i, v)
         for i, v in enumerate(SPLIT_SIZES)]
        self._splitter.setCollapsible(0, False)
        self._splitter.setCollapsible(1, False)

        if model:
            self.setModel(model)

def keyPressEvent(self, key_event):
        if key_event.key() == Qt.Qt.Key_Escape:
            self.abort()
            key_event.accept()
        TaurusWidget.keyPressEvent(self, key_event)

return None

        item = index.internalPointer()
        row, column, depth = index.row(), index.column(), item.depth()
        item_role = self.role(column, depth)

        ret = None
        if role == Qt.Qt.DisplayRole:
            ret = Qt.QString(item.data(index))
        elif role == Qt.Qt.DecorationRole:
            ret = item.icon()
        elif role == Qt.Qt.ToolTipRole:
            ret = item.toolTip()
        # elif role == Qt.Qt.SizeHintRole:
        #    ret = self.columnSize(column)
        elif role == Qt.Qt.FontRole:
            ret = self.DftFont
        return ret

def __init__(self, parent=None, designMode=False, taurusparam=None, toolbar=True, **kwargs):
        '''see :class:`guiqwt.plot.CurveDialog` for other valid initialization parameters'''
        CurveDialog.__init__(self, parent=parent, toolbar=toolbar, **kwargs)
        TaurusBaseWidget.__init__(self, 'TaurusTrendDialog')
        self.deprecated(rel='4.1', dep='TaurusTrendDialog', alt='TaurusTrend / taurus tpg trend launcher')
        self.setWindowFlags(Qt.Qt.Widget)
        self._designMode = designMode
        self._modelNames = CaselessList()
        from guiqwt.styles import style_generator
        self.style = style_generator()
        self.setSupportedMimeTypes(
            [TAURUS_MODEL_LIST_MIME_TYPE, TAURUS_ATTR_MIME_TYPE])
        from taurus.qt.qtgui.extra_guiqwt.tools import TaurusModelChooserTool, AutoScrollTool
        self.add_tool(TaurusModelChooserTool, singleModel=False)
        self.add_tool(AutoScrollTool)
        self.setModifiableByUser(self._modifiableByUser)
        if taurusparam is None:
            taurusparam = TaurusTrendParam()
        self.defaultTaurusparam = taurusparam
        self.setContextMenuPolicy(Qt.Qt.CustomContextMenu)
        self.registerConfigDelegate(self.get_tool(AutoScrollTool))

self._rect = Qt.QGraphicsRectItem(self)
        if scene is not None:
            scene.addItem(self._rect)
        self._rect.setBrush(Qt.QBrush(Qt.Qt.NoBrush))
        self._rect.setPen(Qt.QPen(Qt.Qt.NoPen))
        self._text = Qt.QGraphicsTextItem(self)
        if scene is not None:
            scene.addItem(self._text)
        self._text.setTransform(
            Qt.QTransform.fromScale(self._TEXT_RATIO, self._TEXT_RATIO),
            True)

        self._validBackground = None
        # using that like the previous code create a worst result
        self.__layoutValide = True
        self._alignment = Qt.Qt.AlignCenter | Qt.Qt.AlignVCenter

def __init__(self, qt_parent=None, designMode=False):
        Qt.QWidget.__init__(self, qt_parent)
        layout = Qt.QGridLayout()
        layout.setMargin(0)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(0)
        self.setLayout(layout)
        self.setStyleSheet(_S)
        self.__dict__['spinBox'] = spin = TaurusValueSpinBox(
            qt_parent=self, designMode=designMode)
        self.__dict__['sliderButton1'] = b1 = Qt.QToolButton(self)
        self.__dict__['sliderButton2'] = b2 = Qt.QToolButton(self)
        b1.setIcon(getStandardIcon(Qt.QStyle.SP_TitleBarShadeButton, b1))
        b2.setIcon(getStandardIcon(Qt.QStyle.SP_TitleBarUnshadeButton, b2))
        layout.addWidget(spin, 0, 0, 2, 1)
        layout.addWidget(b1, 0, 1, 1, 1, Qt.Qt.AlignBottom)
        layout.addWidget(b2, 1, 1, 1, 1, Qt.Qt.AlignTop)
        layout.setColumnStretch(0, 1)
        layout.setColumnStretch(1, 0)

        policy = self.sizePolicy()
        policy.setHorizontalPolicy(Qt.QSizePolicy.Minimum)
        policy.setVerticalPolicy(Qt.QSizePolicy.Fixed)
        self.setSizePolicy(policy)

def changeAspectRatio(self, i):
            v = Qt.Qt.IgnoreAspectRatio
            if i == 1:
                v = Qt.Qt.KeepAspectRatio
            elif i == 2:
                v = Qt.Qt.KeepAspectRatioByExpanding
            self.w.setAspectRatioMode(v)

down = _DownArrowButton(id-i-1)
            d.setButtons(up, down)
            up.setFocusProxy(d)
            down.setFocusProxy(d)
            self._upButtons.addButton(up, col)
            self._downButtons.addButton(down, col)
            self._digitLabels.append(d)
            if self.getShowArrowButtons():
                l.addWidget(up, 0, col)
                l.addWidget(down, 2, col)
            l.addWidget(d, 1, col)

        if showDot:
            dotLabel = _DigitLabel('.')
            dotLabel.setFocusPolicy(Qt.Qt.NoFocus)
            dotLabel.setAlignment(Qt.Qt.AlignCenter)
            self._digitLabels.append(dotLabel)
            l.addWidget(dotLabel, 1, id + 1)
            
        for i in xrange(id, digits):
            col = i + 1
            if showDot: col += 1
            d = _DigitLabel('0')
            up   = _UpArrowButton(id-i-1)
            down = _DownArrowButton(id-i-1)
            d.setButtons(up, down)
            up.setFocusProxy(d)
            down.setFocusProxy(d)
            self._upButtons.addButton(up, col)
            self._downButtons.addButton(down, col)
            self._digitLabels.append(d)
            if self.getShowArrowButtons():