def _paint_arc(self, item, center, radius_x, radius_y):
if item.is_closed:
self._painter.drawEllipse(center, radius_x, radius_y)
else:
# drawArc cannot be filled !
rectangle = QRectF(
center + QPointF(-radius_x, radius_y),
center + QPointF(radius_x, -radius_y),
)
start_angle, stop_angle = [
int(angle * 16)
for angle in (item.start_angle, item.stop_angle)
]
span_angle = stop_angle - start_angle
if span_angle < 0:
span_angle = 5760 + span_angle
self._painter.drawArc(rectangle, start_angle, span_angle)
def _update_viewport_area(self):
offset = self._viewport_size / 2 * self.scale_mm_by_px
x, y = self._center
dx, dy = offset
self._area = Interval2D(
(x - dx, x + dx),
(y - dy, y + dy),
)
# Fixme: QPointF ???
self._translation = -QPointF(self._area.x.inf, self._area.y.sup)
def scene_to_viewport(self, position):
point = QPointF(position.x, position.y)
point += self._translation
point *= self._scale
point = QPointF(point.x(), -point.y())
return point
def viewport_to_scene(self, position):
point = QPointF(position.x(), -position.y())
point /= self._scale
point -= self._translation
return self._point_to_np(point)
def scene_to_viewport(self, position):
return QPointF(position.x * self._scale, position.y * self._scale)