def default_font_family():
global _dff
if _dff is None:
families = set(map(unicode, QFontDatabase().families()))
for x in ('Ubuntu Mono', 'Consolas', 'Liberation Mono'):
if x in families:
_dff = x
break
if _dff is None:
_dff = 'Courier New'
return _dff
def __init__(self, *args):
QAbstractListModel.__init__(self, *args)
from calibre.utils.fonts import fontconfig
try:
self.families = fontconfig.find_font_families()
except:
self.families = []
print 'WARNING: Could not load fonts'
traceback.print_exc()
# Restrict to Qt families as Qt tends to crash
qt_families = set([unicode(x) for x in QFontDatabase().families()])
self.families = list(qt_families.intersection(set(self.families)))
self.families.sort()
self.families[:0] = [_('None')]
self.font = QFont('Verdana' if iswindows else 'sansserif')
def do_paint(self, painter, option, index):
text = unicode(index.data(Qt.DisplayRole).toString())
font = QFont(option.font)
font.setPointSize(QFontInfo(font).pointSize() * 1.5)
font2 = QFont(font)
font2.setFamily(text)
system, has_latin = writing_system_for_font(font2)
if has_latin:
font = font2
r = option.rect
if option.state & QStyle.State_Selected:
painter.setPen(QPen(option.palette.highlightedText(), 0))
if (option.direction == Qt.RightToLeft):
r.setRight(r.right() - 4)
else:
r.setLeft(r.left() + 4)
painter.setFont(font)
painter.drawText(r,
Qt.AlignVCenter | Qt.AlignLeading | Qt.TextSingleLine,
text)
if (system != QFontDatabase.Any):
w = painter.fontMetrics().width(text + " ")
painter.setFont(font2)
sample = QFontDatabase().writingSystemSample(system)
if (option.direction == Qt.RightToLeft):
r.setRight(r.right() - w)
else:
r.setLeft(r.left() + w)
painter.drawText(
r, Qt.AlignVCenter | Qt.AlignLeading | Qt.TextSingleLine,
sample)
def writing_system_for_font(font):
has_latin = True
systems = QFontDatabase().writingSystems(font.family())
# this just confuses the algorithm below. Vietnamese is Latin with lots of
# special chars
try:
systems.remove(QFontDatabase.Vietnamese)
except ValueError:
pass
system = QFontDatabase.Any
if (QFontDatabase.Latin not in systems):
has_latin = False
# we need to show something
if systems:
system = systems[-1]
else:
systems.remove(QFontDatabase.Latin)
if not systems:
return system, has_latin
if (len(systems) == 1 and systems[0] > QFontDatabase.Cyrillic):
return systems[0], has_latin
if (len(systems) <= 2 and systems[-1] > QFontDatabase.Armenian
and systems[-1] < QFontDatabase.Vietnamese):
return systems[-1], has_latin
if (len(systems) <= 5 and systems[-1] >= QFontDatabase.SimplifiedChinese
and systems[-1] <= QFontDatabase.Korean):
system = systems[-1]
return system, has_latin
