def showFrame(self, image_widget, dimensions):
if self.positions_df is None:
return
self.set_unit_scaling()
scaleFactor = image_widget.scaleFactor
self.clearAll(image_widget)
frame_no = dimensions['t'].position
selection = self.positions_df[self.positions_df['frame'] == frame_no]
for i, row in selection.iterrows():
x = float(row[self.x_name]) * self.unit_scaling
y = float(row[self.y_name]) * self.unit_scaling
r = float(row[self.r_name]) * self.unit_scaling
if np.isnan(r):
r = 10.0
ellipse = QGraphicsEllipseItem(
self.rect_from_xyr(x, y, r, scaleFactor))
pen = ellipse.pen()
pen.setWidth(2)
pen.setColor(Qt.red)
ellipse.setPen(pen)
image_widget.addItemToScene(ellipse)
self.items.append(ellipse)
