Python QThread.currentThread方法代码示例

# 需要导入模块: from PyQt5.Qt import QThread [as 别名]
# 或者: from PyQt5.Qt.QThread import currentThread [as 别名]
def must_use_qt(headless=True):
    ''' This function should be called if you want to use Qt for some non-GUI
    task like rendering HTML/SVG or using a headless browser. It will raise a
    RuntimeError if using Qt is not possible, which will happen if the current
    thread is not the main GUI thread. On linux, it uses a special QPA headless
    plugin, so that the X server does not need to be running. '''
    global gui_thread
    ensure_app(headless=headless)
    if gui_thread is None:
        gui_thread = QThread.currentThread()
    if gui_thread is not QThread.currentThread():
        raise RuntimeError('Cannot use Qt in non GUI thread')

# 需要导入模块: from PyQt5.Qt import QThread [as 别名]
# 或者: from PyQt5.Qt.QThread import currentThread [as 别名]
def must_use_qt():
    ''' This function should be called if you want to use Qt for some non-GUI
    task like rendering HTML/SVG or using a headless browser. It will raise a
    RuntimeError if using Qt is not possible, which will happen if the current
    thread is not the main GUI thread. On linux, it uses a special QPA headless
    plugin, so that the X server does not need to be running. '''
    global gui_thread, _store_app
    if _store_app is None and QApplication.instance() is None:
        args = sys.argv[:1]
        if islinux or isbsd:
            args += ['-platformpluginpath', sys.extensions_location, '-platform', 'headless']
        _store_app = QApplication(args)
    if gui_thread is None:
        gui_thread = QThread.currentThread()
    if gui_thread is not QThread.currentThread():
        raise RuntimeError('Cannot use Qt in non GUI thread')

# 需要导入模块: from PyQt5.Qt import QThread [as 别名]
# 或者: from PyQt5.Qt.QThread import currentThread [as 别名]
    def __init__(self, args, force_calibre_style=False, override_program_name=None, headless=False, color_prefs=gprefs):
        self.file_event_hook = None
        if override_program_name:
            args = [override_program_name] + args[1:]
        if headless:
            if not args:
                args = sys.argv[:1]
            args.extend(['-platformpluginpath', sys.extensions_location, '-platform', 'headless'])
        qargs = [i.encode('utf-8') if isinstance(i, unicode) else i for i in args]
        self.pi = plugins['progress_indicator'][0]
        QApplication.__init__(self, qargs)
        self.setup_styles(force_calibre_style)
        f = QFont(QApplication.font())
        if (f.family(), f.pointSize()) == ('Sans Serif', 9):  # Hard coded Qt settings, no user preference detected
            f.setPointSize(10)
            QApplication.setFont(f)
        f = QFontInfo(f)
        self.original_font = (f.family(), f.pointSize(), f.weight(), f.italic(), 100)
        if not self.using_calibre_style and self.style().objectName() == 'fusion':
            # Since Qt is using the fusion style anyway, specialize it
            self.load_calibre_style()
        fi = gprefs['font']
        if fi is not None:
            font = QFont(*(fi[:4]))
            s = gprefs.get('font_stretch', None)
            if s is not None:
                font.setStretch(s)
            QApplication.setFont(font)

        dl = QLocale(get_lang())
        if unicode(dl.bcp47Name()) != u'C':
            QLocale.setDefault(dl)
        global gui_thread, qt_app
        gui_thread = QThread.currentThread()
        self._translator = None
        self.load_translations()
        qt_app = self
        self._file_open_paths = []
        self._file_open_lock = RLock()

        if not isosx:
            # OS X uses a native color dialog that does not support custom
            # colors
            self.color_prefs = color_prefs
            self.read_custom_colors()
            self.lastWindowClosed.connect(self.save_custom_colors)

        if isxp:
            error_dialog(None, _('Windows XP not supported'), '<p>' + _(
                'calibre versions newer than 2.0 do not run on Windows XP. This is'
                ' because the graphics toolkit calibre uses (Qt 5) crashes a lot'
                ' on Windows XP. We suggest you stay with <a href="%s">calibre 1.48</a>'
                ' which works well on Windows XP.') % 'http://download.calibre-ebook.com/1.48.0/', show=True)
            raise SystemExit(1)

# 需要导入模块: from PyQt5.Qt import QThread [as 别名]
# 或者: from PyQt5.Qt.QThread import currentThread [as 别名]
    def __init__(self, func, queued=True, parent=None):
        global gui_thread
        if gui_thread is None:
            gui_thread = QThread.currentThread()
        if not is_gui_thread():
            raise ValueError(
                'You can only create a FunctionDispatcher in the GUI thread')

        QObject.__init__(self, parent)
        self.func = func
        typ = Qt.QueuedConnection
        if not queued:
            typ = Qt.AutoConnection if queued is None else Qt.DirectConnection
        self.dispatch_signal.connect(self.dispatch, type=typ)
        self.q = Queue.Queue()
        self.lock = threading.Lock()

# 需要导入模块: from PyQt5.Qt import QThread [as 别名]
# 或者: from PyQt5.Qt.QThread import currentThread [as 别名]
    def __init__(self, args, force_calibre_style=False, override_program_name=None, headless=False):
        self.file_event_hook = None
        if override_program_name:
            args = [override_program_name] + args[1:]
        if headless:
            if not args:
                args = sys.argv[:1]
            args.extend(['-platformpluginpath', sys.extensions_location, '-platform', 'headless'])
        qargs = [i.encode('utf-8') if isinstance(i, unicode) else i for i in args]
        self.pi = plugins['progress_indicator'][0]
        self.setup_styles(force_calibre_style)
        QApplication.__init__(self, qargs)
        f = QFont(QApplication.font())
        if (f.family(), f.pointSize()) == ('Sans Serif', 9):  # Hard coded Qt settings, no user preference detected
            f.setPointSize(10)
            QApplication.setFont(f)
        f = QFontInfo(f)
        self.original_font = (f.family(), f.pointSize(), f.weight(), f.italic(), 100)
        if not self.using_calibre_style and self.style().objectName() == 'fusion':
            # Since Qt is using the fusion style anyway, specialize it
            self.load_calibre_style()
        fi = gprefs['font']
        if fi is not None:
            font = QFont(*(fi[:4]))
            s = gprefs.get('font_stretch', None)
            if s is not None:
                font.setStretch(s)
            QApplication.setFont(font)

        dl = QLocale(get_lang())
        if unicode(dl.bcp47Name()) != u'C':
            QLocale.setDefault(dl)
        global gui_thread, qt_app
        gui_thread = QThread.currentThread()
        self._translator = None
        self.load_translations()
        qt_app = self
        self._file_open_paths = []
        self._file_open_lock = RLock()

# 需要导入模块: from PyQt5.Qt import QThread [as 别名]
# 或者: from PyQt5.Qt.QThread import currentThread [as 别名]
def is_gui_thread():
    global gui_thread
    return gui_thread is QThread.currentThread()