def _get_qfont(font: fonts.FontFace) -> Optional[qg.QFont]:
qfont = None
if font:
family = font.family
italic = "italic" in font.style.lower()
weight = _map_weight(font.weight)
qfont = qg.QFont(family, weight=weight, italic=italic)
# INFO: setting the stretch value makes results worse!
# qfont.setStretch(_map_stretch(font.stretch))
return qfont
def __init__(
self,
scene: Optional[qw.QGraphicsScene] = None,
*,
use_text_cache: bool = True,
debug_draw_rect: bool = False,
extra_lineweight_scaling: float = 2.0,
):
"""
Args:
extra_lineweight_scaling: compared to other backends,
PyQt draws lines which appear thinner
"""
super().__init__()
self._scene = scene or qw.QGraphicsScene() # avoids many type errors
self._color_cache: Dict[Color, qg.QColor] = {}
self._pattern_cache: Dict[PatternKey, int] = {}
self._no_line = qg.QPen(qc.Qt.NoPen)
self._no_fill = qg.QBrush(qc.Qt.NoBrush)
self._text_renderer = TextRenderer(qg.QFont(), use_text_cache)
self._line_renderer: PyQtLineRenderer
self._extra_lineweight_scaling = extra_lineweight_scaling
self._debug_draw_rect = debug_draw_rect