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Allow setting an env var on linux to use the system Qt theme

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Kovid Goyal 2017-05-17 21:01:20 +05:30
parent 0d690f3225
commit fafd278b6e
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2 changed files with 15 additions and 7 deletions
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7
manual/customize.rst
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@ -32,7 +32,12 @@ Environment variables
* ``CALIBRE_TEST_TRANSLATION`` - Used to test a translation .po file (should be the path to the .po file)
* ``CALIBRE_NO_NATIVE_FILEDIALOGS`` - Causes calibre to not use native file dialogs for selecting files/directories.
* ``CALIBRE_NO_NATIVE_MENUBAR`` - Causes calibre to not create a native (global) menu on Ubuntu Unity and similar linux desktop environments. The menu is instead placed inside the window, as is traditional.
* ``CALIBRE_IGNORE_SYSTEM_THEME`` - Causes calibre to ignore any system Qt style plugins and use its builtin style plugin instead. Useful to workaround crashes caused by the system Qt plugin being incompatible with the version of Qt shipped with calibre.
* ``CALIBRE_USE_SYSTEM_THEME`` - By default, on Linux, calibre uses its own
builtin Qt style. This is to avoid crashes and hangs caused by incompatibilities
between the version of Qt calibre is built against and the system Qt. The
downside is that calibre may not follow the system look and feel. If
you set this environment variable on Linux, it will cause calibre to use
the system theme -- beware of crashes and hangs.
* ``CALIBRE_SHOW_DEPRECATION_WARNINGS`` - Causes calibre to print deprecation warnings to stdout. Useful for calibre developers.
* ``CALIBRE_NO_DEFAULT_PROGRAMS`` - Prevent calibre from automatically registering the filetypes it is capable of handling with Windows.
* ``SYSFS_PATH`` - Use if sysfs is mounted somewhere other than /sys

15
src/calibre/gui2/__init__.py
View File

@ -1075,12 +1075,15 @@ class Application(QApplication):
load_builtin_fonts()
def setup_styles(self, force_calibre_style):
self.using_calibre_style = force_calibre_style or 'CALIBRE_IGNORE_SYSTEM_THEME' in os.environ or (
gprefs['ui_style'] != 'system')
if not iswindows and not isosx:
# Force calibre style on linux as the system style causes
# crashes/hangs in Qt
self.using_calibre_style = True
if iswindows or isosx:
using_calibre_style = gprefs['ui_style'] != 'system'
else:
using_calibre_style = 'CALIBRE_USE_SYSTEM_THEME' in os.environ
if force_calibre_style:
using_calibre_style = True
self.using_calibre_style = using_calibre_style
if DEBUG:
prints('Using calibre Qt style:', self.using_calibre_style)
if self.using_calibre_style:
self.load_calibre_style()