Python PyQt5.QtCore.pyqtSignal() Examples

def test_slot():
    class Dummy(QObject):

        signal = pyqtSignal(int)

        def __init__(self):
            super().__init__()
            self.value = 0

    dummy = Dummy()

    @utils.slot
    def test(x: int):
        dummy.value = x

    dummy.signal.connect(test)
    dummy.signal.emit(42)
    assert dummy.value == 42 

def _pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, QtWidgets, uic

    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)

    _add(PyQt5, "__binding__", PyQt5.__name__)
    _add(PyQt5, "load_ui", lambda fname: uic.loadUi(fname))
    _add(PyQt5, "translate", lambda context, sourceText, disambiguation, n: (
        QtCore.QCoreApplication(context, sourceText,
                                disambiguation, n)))
    _add(PyQt5,
         "setSectionResizeMode",
         QtWidgets.QHeaderView.setSectionResizeMode)

    _maintain_backwards_compatibility(PyQt5)

    return PyQt5 

def _pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, QtWidgets, uic

    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)

    _add(PyQt5, "__binding__", PyQt5.__name__)
    _add(PyQt5, "load_ui", lambda fname: uic.loadUi(fname))
    _add(PyQt5, "translate", lambda context, sourceText, disambiguation, n: (
        QtCore.QCoreApplication(context, sourceText,
                                disambiguation, n)))
    _add(PyQt5,
         "setSectionResizeMode",
         QtWidgets.QHeaderView.setSectionResizeMode)

    _maintain_backwards_compatibility(PyQt5)

    return PyQt5 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui, QtPrintSupport

    import sip

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)
    QtGuiCompat.__dict__.update(QtPrintSupport.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui, QtPrintSupport

    import sip

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)
    QtGuiCompat.__dict__.update(QtPrintSupport.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def _pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, QtWidgets, uic

    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)

    _add(QtCompat, "__binding__", PyQt5.__name__)
    _add(QtCompat, "__binding_version__", PyQt5.QtCore.PYQT_VERSION_STR)
    _add(QtCompat, "__qt_version__", PyQt5.QtCore.QT_VERSION_STR)
    _add(QtCompat, "load_ui", lambda fname: uic.loadUi(fname))
    _add(QtCompat, "translate", QtCore.QCoreApplication.translate)
    _add(QtCompat, "setSectionResizeMode",
         QtWidgets.QHeaderView.setSectionResizeMode)

    _maintain_backwards_compatibility(PyQt5)

    return PyQt5 

def start_playing(self, filename):
        class QtPlaybin(Playbin, QtCore.QObject):
            eos = QtCore.pyqtSignal()

            def end_of_stream(self):
                self.eos.emit()

            def create_video_sink(self, name):
                if platform.system() == 'Darwin':
                    # default (gl) sink does not play well with GstOverlay, at least not when using Qt
                    return Gst.ElementFactory.make('osxvideosink', name)
                elif platform.system() == 'Linux':
                    # Same for the default on Linux...
                    return Gst.ElementFactory.make('xvimagesink', name)
                return super().create_video_sink(name)

        self.playbin = QtPlaybin(win_id=self.winId())
        self.playbin.eos.connect(self.close)
        yield from self.playbin.play(filename) 

def _pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, QtWidgets, uic

    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)

    _add(PyQt5, "__binding__", PyQt5.__name__)
    _add(PyQt5, "load_ui", lambda fname: uic.loadUi(fname))
    _add(PyQt5, "translate", lambda context, sourceText, disambiguation, n: (
        QtCore.QCoreApplication(context, sourceText,
                                disambiguation, n)))
    _add(PyQt5,
         "setSectionResizeMode",
         QtWidgets.QHeaderView.setSectionResizeMode)

    _maintain_backwards_compatibility(PyQt5)

    return PyQt5 

def __init__(self, main_window):
        super().__init__(main_window)
        self.about.setText("Author:\nErebos\n2018.09.25")
        self.md5_file_name = ""
        self.import_plaintext_button_file_name = ""
        self.export_ciphertext_button_file_name = ""
        self.rsa_public_key_file_name = ""
        self.ecc_public_key_file_name = ""
        self.file_to_encrypt_name = ""
        self.file_to_decrypt_name = ""
        self.encrypted_file_to_save_name = ""
        self.decrypted_file_to_save_name = ""

        # 自定义信号范例
        self._window_switch_signal = QtCore.pyqtSignal(str)
        self.button_mapper = QSignalMapper(self)

        self.show_base_frame = True
        self.is_show_widgets = True
        self.default_page_set()
        self.setup_mapper()
        self.setup_mapper()
        self.setup_connect() 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, uic

    remap(QtCore, "Signal", QtCore.pyqtSignal)
    remap(QtCore, "Slot", QtCore.pyqtSlot)
    remap(QtCore, "Property", QtCore.pyqtProperty)

    add(PyQt5, "__wrapper_version__", __version__)
    add(PyQt5, "__binding__", "PyQt5")
    add(PyQt5, "__binding_version__", QtCore.PYQT_VERSION_STR)
    add(PyQt5, "__qt_version__", QtCore.QT_VERSION_STR, safe=False)
    add(PyQt5, "__added__", __added__)
    add(PyQt5, "__remapped__", __remapped__)
    add(PyQt5, "__modified__", __modified__)
    add(PyQt5, "load_ui", lambda fname: uic.loadUi(fname))

    return PyQt5 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """
    import sip

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """
    import sip

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def _pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, QtWidgets, uic

    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)

    _add(QtCompat, "__binding__", PyQt5.__name__)
    _add(QtCompat, "__binding_version__", PyQt5.QtCore.PYQT_VERSION_STR)
    _add(QtCompat, "__qt_version__", PyQt5.QtCore.QT_VERSION_STR)
    _add(QtCompat, "load_ui", lambda fname: uic.loadUi(fname))
    _add(QtCompat, "translate", QtCore.QCoreApplication.translate)
    _add(QtCompat, "setSectionResizeMode",
         QtWidgets.QHeaderView.setSectionResizeMode)

    _maintain_backwards_compatibility(PyQt5)

    return PyQt5 

def _set_private_bridge_handler(self, bridge_signal, handler, setter):
        """
        Helper method to set handler for private bridges like the ones use for
        double click and popup menu events.

        :param pyqtSignal bridge_signal: A Qt signal in bridge object.
        :param callable|None handler: Handler of signal. If None it
            disconnects handler from graph.
        :param callable setter: Internal setter method used to set bridge in
            QmxGraph object, only if already loaded.
        """
        try:
            bridge_signal.disconnect()
        except TypeError:
            # It fails if tries to disconnect without any handler connected.
            pass

        if handler:
            bridge_signal.connect(handler)

        if self.is_loaded():
            setter() 

def _pyqt5():
    import PyQt5.Qt
    from PyQt5 import QtCore, QtWidgets, uic

    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)

    _add(PyQt5, "__binding__", PyQt5.__name__)
    _add(PyQt5, "load_ui", lambda fname: uic.loadUi(fname))
    _add(PyQt5, "translate", lambda context, sourceText, disambiguation, n: (
        QtCore.QCoreApplication(context, sourceText,
                                disambiguation, n)))
    _add(PyQt5,
         "setSectionResizeMode",
         QtWidgets.QHeaderView.setSectionResizeMode)

    _maintain_backwards_compatibility(PyQt5)

    return PyQt5 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui, QtPrintSupport

    import sip

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)
    QtGuiCompat.__dict__.update(QtPrintSupport.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui
    
    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """
    import sip

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors raised within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors raised within this function are non-recoverable
    """
    from PyQt5 import QtGui, QtCore, QtSvg

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    return QtCore, QtGui, QtSvg, QT_API_PYQT5 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def __init__(self, myvar, parent=None):
        QtCore.QThread.__init__(self, parent)
        self.notifyProgress = QtCore.pyqtSignal(int)
        self.l = myvar 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors rasied within this function are non-recoverable
    """
    import sip

    from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # Join QtGui and QtWidgets for Qt4 compatibility.
    QtGuiCompat = types.ModuleType('QtGuiCompat')
    QtGuiCompat.__dict__.update(QtGui.__dict__)
    QtGuiCompat.__dict__.update(QtWidgets.__dict__)

    api = QT_API_PYQT5
    return QtCore, QtGuiCompat, QtSvg, api 

def _setup_pyqt5():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    if QT_API == QT_API_PYQT5:
        from PyQt5 import QtCore, QtGui, QtWidgets
        __version__ = QtCore.PYQT_VERSION_STR
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
    elif QT_API == QT_API_PYSIDE2:
        from PySide2 import QtCore, QtGui, QtWidgets, __version__
    else:
        raise ValueError("Unexpected value for the 'backend.qt5' rcparam")
    _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName

    def is_pyqt5():
        return True 

def handle_print(
        widget: "PrintWidget",
        dialog: Union[QPrintPreviewDialog, QPrintDialog],
        *signals: pyqtSignal,
        auto_apply_orientation: bool = False,
    ) -> None:
        """Handle a print request of widget for a specific dialog."""

        def handler() -> None:
            widget.print(dialog.printer(), auto_apply_orientation)

        for signal in signals:
            signal.connect(handler)
        dialog.open(handler) 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("QtConsole requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("QtConsole requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors raised within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors raised within this function are non-recoverable
    """
    from PyQt5 import QtGui, QtCore, QtSvg

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    return QtCore, QtGui, QtSvg, QT_API_PYQT5 

def pyqtSignal(*args, **kwargs):  # pragma: no cover
    """Declare dummy pyqtSignal function."""
    pass 

def __init__(self):
        QThread.__init__(self)
        self.step = 0
        # self.s = pyqtSignal(str)
        # QObject.__init__(self)
        # self.down = down
        # self.s.connect(self.do) 

def __init__(self):
            """
            Initialise class
            """
            QtWidgets.QWidget.__init__(self)
            self.setupUi(self)
            output.PPTevents.updateSlide = self.powerpointSlides.setCurrentRow
            self.contentControls.setCurrentIndex(0)

            # TODO not implemented
            """ 
            self.mediaProgressSeek.setMouseTracking(True)
            self.mediaProgressSeek.leaveEvent=self.seekMouse
            self.mediaProgressSeek.mouseMoveEvent=self.seekMouse
            self.mediaProgressSeek.mouseReleaseEvent=lambda e: output.seek(e.x()/self.mediaProgressSeek.width())
            """

            # Update video scrubber position
            class ProgressBarUpdater(QtCore.QThread):
                tick = QtCore.pyqtSignal(int)

                def run(self):
                    while True:
                        self.sleep(1)
                        self.tick.emit(oncue.lib.utils.confine(int(output.VLCposition() * 1000), 0, 1000))

            self.mediaProgressBarThread = ProgressBarUpdater()
            self.mediaProgressBarThread.tick.connect(
                lambda value: self.mediaProgressBar.setValue(value) or self.mediaProgressBar.repaint()) 

def get_signals(self, source):
        cls = source if isinstance(source, type) else type(source)
        signal = type(QtCore.pyqtSignal())
        for name in dir(source):
            if isinstance(getattr(cls, name), signal):
                print(name) 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors raised within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt5():
    """
    Import PyQt5

    ImportErrors raised within this function are non-recoverable
    """
    from PyQt5 import QtGui, QtCore, QtSvg

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    return QtCore, QtGui, QtSvg, QT_API_PYQT5 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("QtConsole requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def import_pyqt4(version=2):
    """
    Import PyQt4

    Parameters
    ----------
    version : 1, 2, or None
      Which QString/QVariant API to use. Set to None to use the system
      default

    ImportErrors rasied within this function are non-recoverable
    """
    # The new-style string API (version=2) automatically
    # converts QStrings to Unicode Python strings. Also, automatically unpacks
    # QVariants to their underlying objects.
    import sip

    if version is not None:
        sip.setapi('QString', version)
        sip.setapi('QVariant', version)

    from PyQt4 import QtGui, QtCore, QtSvg

    if not check_version(QtCore.PYQT_VERSION_STR, '4.7'):
        raise ImportError("IPython requires PyQt4 >= 4.7, found %s" %
                          QtCore.PYQT_VERSION_STR)

    # Alias PyQt-specific functions for PySide compatibility.
    QtCore.Signal = QtCore.pyqtSignal
    QtCore.Slot = QtCore.pyqtSlot

    # query for the API version (in case version == None)
    version = sip.getapi('QString')
    api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT
    return QtCore, QtGui, QtSvg, api 

def _setup_pyqt4():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    def _setup_pyqt4_internal(api):
        global QtCore, QtGui, QtWidgets, \
            __version__, is_pyqt5, _getSaveFileName
        # List of incompatible APIs:
        # http://pyqt.sourceforge.net/Docs/PyQt4/incompatible_apis.html
        _sip_apis = ["QDate", "QDateTime", "QString", "QTextStream", "QTime",
                     "QUrl", "QVariant"]
        try:
            import sip
        except ImportError:
            pass
        else:
            for _sip_api in _sip_apis:
                try:
                    sip.setapi(_sip_api, api)
                except ValueError:
                    pass
        from PyQt4 import QtCore, QtGui
        __version__ = QtCore.PYQT_VERSION_STR
        # PyQt 4.6 introduced getSaveFileNameAndFilter:
        # https://riverbankcomputing.com/news/pyqt-46
        if __version__ < LooseVersion("4.6"):
            raise ImportError("PyQt<4.6 is not supported")
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
        _getSaveFileName = QtGui.QFileDialog.getSaveFileNameAndFilter

    if QT_API == QT_API_PYQTv2:
        _setup_pyqt4_internal(api=2)
    elif QT_API == QT_API_PYSIDE:
        from PySide import QtCore, QtGui, __version__, __version_info__
        # PySide 1.0.3 fixed the following:
        # https://srinikom.github.io/pyside-bz-archive/809.html
        if __version_info__ < (1, 0, 3):
            raise ImportError("PySide<1.0.3 is not supported")
        _getSaveFileName = QtGui.QFileDialog.getSaveFileName
    elif QT_API == QT_API_PYQT:
        _setup_pyqt4_internal(api=1)
    else:
        raise ValueError("Unexpected value for the 'backend.qt4' rcparam")
    QtWidgets = QtGui

    def is_pyqt5():
        return False 

def _setup_pyqt4():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    def _setup_pyqt4_internal(api):
        global QtCore, QtGui, QtWidgets, \
            __version__, is_pyqt5, _getSaveFileName
        # List of incompatible APIs:
        # http://pyqt.sourceforge.net/Docs/PyQt4/incompatible_apis.html
        _sip_apis = ["QDate", "QDateTime", "QString", "QTextStream", "QTime",
                     "QUrl", "QVariant"]
        try:
            import sip
        except ImportError:
            pass
        else:
            for _sip_api in _sip_apis:
                try:
                    sip.setapi(_sip_api, api)
                except ValueError:
                    pass
        from PyQt4 import QtCore, QtGui
        __version__ = QtCore.PYQT_VERSION_STR
        # PyQt 4.6 introduced getSaveFileNameAndFilter:
        # https://riverbankcomputing.com/news/pyqt-46
        if __version__ < LooseVersion("4.6"):
            raise ImportError("PyQt<4.6 is not supported")
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
        _getSaveFileName = QtGui.QFileDialog.getSaveFileNameAndFilter

    if QT_API == QT_API_PYQTv2:
        _setup_pyqt4_internal(api=2)
    elif QT_API == QT_API_PYSIDE:
        from PySide import QtCore, QtGui, __version__, __version_info__
        # PySide 1.0.3 fixed the following:
        # https://srinikom.github.io/pyside-bz-archive/809.html
        if __version_info__ < (1, 0, 3):
            raise ImportError("PySide<1.0.3 is not supported")
        _getSaveFileName = QtGui.QFileDialog.getSaveFileName
    elif QT_API == QT_API_PYQT:
        _setup_pyqt4_internal(api=1)
    else:
        raise ValueError("Unexpected value for the 'backend.qt4' rcparam")
    QtWidgets = QtGui

    def is_pyqt5():
        return False 

def _pyqt4():
    # Attempt to set sip API v2 (must be done prior to importing PyQt4)
    import sip
    try:
        sip.setapi("QString", 2)
        sip.setapi("QVariant", 2)
        sip.setapi("QDate", 2)
        sip.setapi("QDateTime", 2)
        sip.setapi("QTextStream", 2)
        sip.setapi("QTime", 2)
        sip.setapi("QUrl", 2)
    except AttributeError:
        raise ImportError
        # PyQt4 < v4.6
    except ValueError:
        # API version already set to v1
        raise ImportError

    import PyQt4.Qt
    from PyQt4 import QtCore, QtGui, uic

    _remap(PyQt4, "QtWidgets", QtGui)
    _remap(QtCore, "Signal", QtCore.pyqtSignal)
    _remap(QtCore, "Slot", QtCore.pyqtSlot)
    _remap(QtCore, "Property", QtCore.pyqtProperty)
    _remap(QtCore, "QItemSelection", QtGui.QItemSelection)
    _remap(QtCore, "QStringListModel", QtGui.QStringListModel)
    _remap(QtCore, "QItemSelectionModel", QtGui.QItemSelectionModel)
    _remap(QtCore, "QSortFilterProxyModel", QtGui.QSortFilterProxyModel)
    _remap(QtCore, "QAbstractProxyModel", QtGui.QAbstractProxyModel)

    try:
        from PyQt4 import QtWebKit
        _remap(PyQt4, "QtWebKitWidgets", QtWebKit)
    except ImportError:
        # QtWebkit is optional in Qt , therefore might not be available
        pass

    _add(PyQt4, "QtCompat", self)
    _add(PyQt4, "__binding__", PyQt4.__name__)
    _add(PyQt4, "load_ui", lambda fname: uic.loadUi(fname))
    _add(PyQt4, "translate", lambda context, sourceText, disambiguation, n: (
        QtCore.QCoreApplication(context, sourceText,
                                disambiguation, None, n)))
    _add(PyQt4, "setSectionResizeMode", QtGui.QHeaderView.setResizeMode)

    _maintain_backwards_compatibility(PyQt4)

    return PyQt4 

def _setup_pyqt4():
    global QtCore, QtGui, QtWidgets, __version__, is_pyqt5, _getSaveFileName

    def _setup_pyqt4_internal(api):
        global QtCore, QtGui, QtWidgets, \
            __version__, is_pyqt5, _getSaveFileName
        # List of incompatible APIs:
        # http://pyqt.sourceforge.net/Docs/PyQt4/incompatible_apis.html
        _sip_apis = ["QDate", "QDateTime", "QString", "QTextStream", "QTime",
                     "QUrl", "QVariant"]
        try:
            import sip
        except ImportError:
            pass
        else:
            for _sip_api in _sip_apis:
                try:
                    sip.setapi(_sip_api, api)
                except ValueError:
                    pass
        from PyQt4 import QtCore, QtGui
        __version__ = QtCore.PYQT_VERSION_STR
        # PyQt 4.6 introduced getSaveFileNameAndFilter:
        # https://riverbankcomputing.com/news/pyqt-46
        if __version__ < LooseVersion("4.6"):
            raise ImportError("PyQt<4.6 is not supported")
        QtCore.Signal = QtCore.pyqtSignal
        QtCore.Slot = QtCore.pyqtSlot
        QtCore.Property = QtCore.pyqtProperty
        _getSaveFileName = QtGui.QFileDialog.getSaveFileNameAndFilter

    if QT_API == QT_API_PYQTv2:
        _setup_pyqt4_internal(api=2)
    elif QT_API == QT_API_PYSIDE:
        from PySide import QtCore, QtGui, __version__, __version_info__
        # PySide 1.0.3 fixed the following:
        # https://srinikom.github.io/pyside-bz-archive/809.html
        if __version_info__ < (1, 0, 3):
            raise ImportError("PySide<1.0.3 is not supported")
        _getSaveFileName = QtGui.QFileDialog.getSaveFileName
    elif QT_API == QT_API_PYQT:
        _setup_pyqt4_internal(api=1)
    else:
        raise ValueError("Unexpected value for the 'backend.qt4' rcparam")
    QtWidgets = QtGui

    def is_pyqt5():
        return False