def _get_pen(self, properties: Properties) -> qg.QPen:
"""Returns a cosmetic pen with applied lineweight but without line type
support.
"""
px = (
properties.lineweight
/ 0.3527
* self.config.lineweight_scaling
* self._extra_lineweight_scaling
)
pen = qg.QPen(self._get_color(properties.color), px)
# Use constant width in pixel:
pen.setCosmetic(True)
pen.setJoinStyle(qc.Qt.RoundJoin)
return pen
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
def __init__(self, x: float, y: float, brush: qg.QBrush):
super().__init__()
self.location = qc.QPointF(x, y)
self.radius = 1.0
self.setPen(qg.QPen(qc.Qt.NoPen))
self.setBrush(brush)