poimangui.py 文件源码

def _redraw_label(self):
        if self.label is not None:
            self.viewwidget.removeItem(self.label)

            cos_th = np.cos(self.angle() / 180. * np.pi)
            sin_th = np.sin(self.angle() / 180. * np.pi)

            text_pos = self.position\
                + [self.radius * cos_th, self.radius * sin_th]

            if cos_th > 0 and sin_th > 0:
                my_anchor = (0, 1)
            elif cos_th > 0 and sin_th < 0:
                my_anchor = (0, 0)
            elif cos_th < 0 and sin_th < 0:
                my_anchor = (1, 0)
            else:
                my_anchor = (1, 1)

            # Updating the position of the circleROI origin in case it has been rotated.
            # It is important for finish=False so that this action does not call this
            # _redraw_label method recursively
            self.setPos(self.position + self.get_marker_offset(), finish=False)

            my_color = self.color
            if self.selected:
                my_color = self.selectcolor

            self.label = pg.TextItem(text=self.poi.get_name(),
                                     anchor=my_anchor,
                                     color=my_color
                                     )
            self.label.setPos(text_pos[0], text_pos[1])
            self.viewwidget.addItem(self.label)