def __select_range(self, p1: QPointF, p2: QPointF):
rect = QRectF(p1, p2).normalized()
self.__selection.append((rect.topLeft().x(), rect.topRight().x()))
sel_rect_item = SelectionRect(rect)
self.addItem(sel_rect_item)
self.__selection_rect_items.append(sel_rect_item)
def qgraphicsview_map_rect_from_scene(view: QGraphicsView,
rect: QRectF) -> QPolygonF:
"""Like QGraphicsView.mapFromScene(QRectF) but returning a QPolygonF
(without rounding).
"""
tr = view.viewportTransform()
p1 = tr.map(rect.topLeft())
p2 = tr.map(rect.topRight())
p3 = tr.map(rect.bottomRight())
p4 = tr.map(rect.bottomLeft())
return QPolygonF([p1, p2, p3, p4])
