app.py 文件源码

def paintEvent(self, event):                                    # pylint: disable=unused-argument
        painter = QPainter(self)
        painter.setPen(Qt.black)

        widgets = {w.get_id(): (self.top_point(w.geometry()), self.bottom_point(w.geometry()))
                   for w in self.children() if isinstance(w, GoalWidget)}
        for widget_id, points in widgets.items():
            line_start = points[0]
            for parent_widget in self.dependencies[widget_id]:
                line_end = widgets[parent_widget][1]
                painter.drawLine(line_start, line_end)