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')
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')
def rock(server_address):
app = QApplication(sys.argv)
ex = WebView(server_address)
# ex.metaObject().invokeMethod(ex,'test_function',Qt.QueuedConnection)
return ex, app, QThread.currentThread()
def __init__(self, updater):
super().__init__(QEvent.User)
self._updater = updater
self._result = None
self._semaphore = QSemaphore(1)
if QCoreApplication.instance().thread() != QThread.currentThread():
self._semaphore.acquire()
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')
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)
def __init__(self, parent=None, db: DbManager = None, env: DEnvEnvironment = None):
super(DockerWindow, self).__init__(parent)
QThread.currentThread().setObjectName('Docker Window')
self._db = db
self._env = env
# Toolbar
self._toolbar: DockerToolbar = None
# Status
self._status_bar: DockerStatusBar = None
self._debug_console: DebugConsole = None
self._loading_dialog: LoadingDialog = None
self.image_detail_view: DockerImageDialog = None
self.container_console_widget: WorkAreaDockWidget = None
self._docker_service: DockerService = DockerService()
# DAO
self._dao_env: DaoEnvironment = None
self._dao_registry: DaoRegistry = None
self.general_signals = GeneralSignals()
self.docker_signals = DockerSignals()
self.threads = []
self._dock_widgets = {}
self.env_configure_dialog: EnvConfigureDialog = None
self.env_connect_dialog: EnvConnectDialog = None
self.image_pull_dialog: ImagePullDialog = None
self.login_dialog: RepositoryLoginDialog = None
self._init_dao()
self._init_ui()
self.start_docker_service(env=self._env)
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()
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()
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()
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'])
self.headless = 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)
if islinux or isbsd:
self.setAttribute(Qt.AA_DontUseNativeMenuBar, 'CALIBRE_NO_NATIVE_MENUBAR' in os.environ)
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)
if iswindows:
# On windows the highlighted colors for inactive widgets are the
# same as non highlighted colors. This is a regression from Qt 4.
# https://bugreports.qt-project.org/browse/QTBUG-41060
p = self.palette()
for role in (p.Highlight, p.HighlightedText, p.Base, p.AlternateBase):
p.setColor(p.Inactive, role, p.color(p.Active, role))
self.setPalette(p)
# Prevent text copied to the clipboard from being lost on quit due to
# Qt 5 bug: https://bugreports.qt-project.org/browse/QTBUG-41125
self.aboutToQuit.connect(self.flush_clipboard)
def is_gui_thread():
global gui_thread
return gui_thread is QThread.currentThread()
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'])
self.headless = headless
qargs = [i.encode('utf-8') if isinstance(i, unicode) else i for i in args]
self.pi = plugins['progress_indicator'][0]
if not isosx and not headless:
# On OS X high dpi scaling is turned on automatically by the OS, so we dont need to set it explicitly
setup_hidpi()
QApplication.setOrganizationName('calibre-ebook.com')
QApplication.setOrganizationDomain(QApplication.organizationName())
QApplication.setApplicationVersion(__version__)
QApplication.setApplicationName(APP_UID)
QApplication.__init__(self, qargs)
self.setAttribute(Qt.AA_UseHighDpiPixmaps)
self.setAttribute(Qt.AA_SynthesizeTouchForUnhandledMouseEvents, False)
try:
base_dir()
except EnvironmentError as err:
if not headless:
show_temp_dir_error(err)
raise SystemExit('Failed to create temporary directory')
if DEBUG and not headless:
prints('devicePixelRatio:', self.devicePixelRatio())
s = self.primaryScreen()
if s:
prints('logicalDpi:', s.logicalDotsPerInchX(), 'x', s.logicalDotsPerInchY())
prints('physicalDpi:', s.physicalDotsPerInchX(), 'x', s.physicalDotsPerInchY())
if not iswindows:
self.setup_unix_signals()
if islinux or isbsd:
self.setAttribute(Qt.AA_DontUseNativeMenuBar, 'CALIBRE_NO_NATIVE_MENUBAR' in os.environ)
self.setup_styles(force_calibre_style)
self.setup_ui_font()
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)
self.line_height = max(12, QFontMetrics(self.font()).lineSpacing())
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)
if iswindows:
# On windows the highlighted colors for inactive widgets are the
# same as non highlighted colors. This is a regression from Qt 4.
# https://bugreports.qt-project.org/browse/QTBUG-41060
p = self.palette()
for role in (p.Highlight, p.HighlightedText, p.Base, p.AlternateBase):
p.setColor(p.Inactive, role, p.color(p.Active, role))
self.setPalette(p)
# Prevent text copied to the clipboard from being lost on quit due to
# Qt 5 bug: https://bugreports.qt-project.org/browse/QTBUG-41125
self.aboutToQuit.connect(self.flush_clipboard)
