def _pre_and_post_app_setup(self):
''' Call this before instantiating the QApplication object. It sets up
some platform-specific miscellany that need to happen before the
QApplication is constructed.
A function is returned. This function *must* be called after the
QApplication is constructed. '''
callables = []
def call_callables():
for func in callables:
func()
ret = call_callables
if hasattr(QGuiApplication, 'setDesktopFileName'):
QGuiApplication.setDesktopFileName('electron-cash.desktop')
if self.windows_qt_use_freetype:
# Use FreeType for font rendering on Windows. This fixes rendering
# of the Schnorr sigil and allows us to load the Noto Color Emoji
# font if needed.
os.environ['QT_QPA_PLATFORM'] = 'windows:fontengine=freetype'
QCoreApplication.setAttribute(Qt.AA_X11InitThreads)
if hasattr(Qt, "AA_ShareOpenGLContexts"):
QCoreApplication.setAttribute(Qt.AA_ShareOpenGLContexts)
if sys.platform not in ('darwin', ) and hasattr(
Qt, "AA_EnableHighDpiScaling"):
# The below only applies to non-macOS. On macOS this setting is
# never used (because it is implicitly auto-negotiated by the OS
# in a differernt way).
#
# qt_disable_highdpi will be set to None by default, or True if
# specified on command-line. The command-line override is intended
# to supporess high-dpi mode just for this run for testing.
#
# The more permanent setting is qt_enable_highdpi which is the GUI
# preferences option, so we don't enable highdpi if it's explicitly
# set to False in the GUI.
#
# The default on Linux, Windows, etc is to enable high dpi
disable_scaling = self.config.get('qt_disable_highdpi', False)
enable_scaling = self.config.get('qt_enable_highdpi', True)
if not disable_scaling and enable_scaling:
QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
if hasattr(Qt, "AA_UseHighDpiPixmaps"):
QCoreApplication.setAttribute(Qt.AA_UseHighDpiPixmaps)
# macOS Mojave "font rendering looks terrible on PyQt5.11" workaround.
# See: https://old.reddit.com/r/apple/comments/9leavs/fix_mojave_font_rendering_issues_on_a_perapp_basis/
# This affects PyQt 5.11 (which is what we ship in the macOS El Capitan
# .dmg). We apply the workaround and also warn the user to not use
# the El Capitan compatibility .dmg.
if sys.platform in ('darwin', ) and self.qt_version() < (5, 12):
# macOS hacks. On Mojave with PyQt <5.12 the font rendering is terrible.
# As a workaround we need to temporarily set this 'defaults' keys
# which we immediately disable after the QApplication is started.
try:
ver = tuple(int(a) for a in platform.mac_ver()[0].split('.'))
except (TypeError, ValueError):
self.print_error("WARNING: Cannot parse platform.mac_ver",
f"'{platform.mac_ver()[0]}'")
ver = None
if ver and ver >= (10, 14):
from electroncash.utils import macos
self.print_error(
"Mojave+ with PyQt<5.12 detected; applying CGFontRenderingFontSmoothingDisabled workaround..."
)
bundle = macos.get_bundle_identifier()
os.system(
f'defaults write {bundle} CGFontRenderingFontSmoothingDisabled -bool NO'
)
def undo_hack():
os.system(
f'defaults delete {bundle} CGFontRenderingFontSmoothingDisabled'
)
self.print_error(
"Mojave+ font rendering workaround applied.")
#msg = _("Mojave or newer system detected, however you are running the "
# "El Capitan compatibility release of Electron Cash. "
# "Font and graphics rendering may be affected."
# "\n\nPlease obtain the latest non-compatibility version "
# "of Electron Cash for MacOS.")
#QMessageBox.warning(None, _("Warning"), msg) # this works even if app is not exec_() yet.
callables.append(undo_hack)
return ret
def _pre_and_post_app_setup(self):
"""
Call this before instantiating the QApplication object. It sets up
some platform-specific miscellany that need to happen before the
QApplication is constructed.
A function is returned. This function *must* be called after the
QApplication is constructed.
"""
callables = []
def call_callables():
for func in callables:
func()
ret = call_callables
if hasattr(QGuiApplication, 'setDesktopFileName'):
QGuiApplication.setDesktopFileName('electron-cash.desktop')
if self.windows_qt_use_freetype:
# Use FreeType for font rendering on Windows. This fixes rendering
# of the Schnorr sigil and allows us to load the Noto Color Emoji
# font if needed.
os.environ['QT_QPA_PLATFORM'] = 'windows:fontengine=freetype'
QCoreApplication.setAttribute(Qt.AA_X11InitThreads)
if hasattr(Qt, "AA_ShareOpenGLContexts"):
QCoreApplication.setAttribute(Qt.AA_ShareOpenGLContexts)
if sys.platform not in ('darwin',) and hasattr(Qt, "AA_EnableHighDpiScaling"):
# The below only applies to non-macOS. On macOS this setting is
# never used (because it is implicitly auto-negotiated by the OS
# in a differernt way).
#
# qt_disable_highdpi will be set to None by default, or True if
# specified on command-line. The command-line override is intended
# to supporess high-dpi mode just for this run for testing.
#
# The more permanent setting is qt_enable_highdpi which is the GUI
# preferences option, so we don't enable highdpi if it's explicitly
# set to False in the GUI.
#
# The default on Linux, Windows, etc is to enable high dpi
disable_scaling = self.config.get('qt_disable_highdpi', False)
enable_scaling = self.config.get('qt_enable_highdpi', True)
if not disable_scaling and enable_scaling:
QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
if hasattr(Qt, "AA_UseHighDpiPixmaps"):
QCoreApplication.setAttribute(Qt.AA_UseHighDpiPixmaps)
# Set mac_ver to the appropriate macOS version e.g.: (10,15,1) for Catalina, etc or None if not macOS
mac_ver = None
if sys.platform in ('darwin',):
try:
mac_ver = tuple(int(a) for a in platform.mac_ver()[0].split('.'))
self.print_error("macOS version:", mac_ver)
except (TypeError, ValueError) as e:
self.print_error("WARNING: Cannot parse platform.mac_ver:", repr(e))
# macOS Mojave "font rendering looks terrible on PyQt5.11" workaround.
# See: https://old.reddit.com/r/apple/comments/9leavs/fix_mojave_font_rendering_issues_on_a_perapp_basis/
# This affects PyQt 5.11 (which is what we ship in the macOS El Capitan
# .dmg). We apply the workaround and also warn the user to not use
# the El Capitan compatibility .dmg.
if mac_ver and mac_ver >= (10, 14) and self.qt_version() < (5, 12):
# macOS hacks. On Mojave with PyQt <5.12 the font rendering is terrible.
# As a workaround we need to temporarily set this 'defaults' keys
# which we immediately disable after the QApplication is started.
from electroncash.utils import macos
self.print_error("Mojave+ with PyQt<5.12 detected; applying CGFontRenderingFontSmoothingDisabled workaround...")
bundle = macos.get_bundle_identifier()
os.system(f'defaults write {bundle} CGFontRenderingFontSmoothingDisabled -bool NO')
def undo_hack():
os.system(f'defaults delete {bundle} CGFontRenderingFontSmoothingDisabled')
self.print_error("Mojave+ font rendering workaround applied.")
callables.append(undo_hack)
# macOS Big Sur workaround for Qt>=5.13.2 sometimes not working at all
# See: https://bugreports.qt.io/browse/QTBUG-87014
# See also: https://stackoverflow.com/questions/64818879/is-there-any-solution-regarding-to-pyqt-library-doesnt-work-in-mac-os-big-sur
if mac_ver and mac_ver >= (10, 16) and self.qt_version() >= (5, 13, 2) and self.qt_version() < (5, 15, 2):
# Setting this env var causes Qt to use some other macOS API that always works on Big Sur
os.environ['QT_MAC_WANTS_LAYER'] = '1'
self.print_error(f"macOS Big Sur Qt workaround applied")
def setup_layout_direction():
"""Sets the app layout direction depending on language. To be called
after self.app is created successfully. Note this *MUST* be called
after set_language has been called."""
assert i18n.set_language_called > 0
lc = i18n.language.info().get('language')
lc = '' if not isinstance(lc, str) else lc
lc = lc.split('_')[0]
layout_direction = Qt.LeftToRight
blurb = "left-to-right"
if lc in {'ar', 'fa', 'he', 'ps', 'ug', 'ur'}: # Right-to-left languages
layout_direction = Qt.RightToLeft
blurb = "right-to-left"
self.print_error("Setting layout direction:", blurb)
self.app.setLayoutDirection(layout_direction)
# callable will be called after self.app is set-up successfully
callables.append(setup_layout_direction)
return ret