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当我修改 legend_picking.py 示例时，我遇到了一个有趣的怪癖，其中图例位于轴之外，如下所示：

#leg = ax.legend(loc='upper left', fancybox=True, shadow=True)
leg = ax.legend(loc='upper left', fancybox=True, shadow=True,bbox_to_anchor=(.95,0.95))

onpick 函数最终为我在图例中单击的 Line2D 艺术家调用了两次。我认为这与传说中的孩子“树”有两次线条有关。一次，在装箱机的子代中，其次，作为传奇行列表的子代。

我的解决方法是修改 onpick 例程，如下所示：

def onpick(event):
  # on the pick event, find the orig line corresponding to the
  # legend proxy line, and toggle the visibility

  # prevent double pick of same artist all on the same mouseevent
  if onpick.lastevent!=event.mouseevent:
    onpick.artistsdone=[]
  if onpick.lastevent==event.mouseevent and event.artist in onpick.artistsdone:
    return
  onpick.lastevent=event.mouseevent        # save off the mouseevent
  onpick.artistsdone.append(event.artist)  # mark this artist as serviced
  legline = event.artist
  origline = lined[legline]
  vis = not origline.get_visible()
  origline.set_visible(vis)
  # Change the alpha on the line in the legend so we can see what lines
  # have been toggled
  if vis:
      legline.set_alpha(1.0)
  else:
      legline.set_alpha(0.2)
  fig.canvas.draw()
onpick.lastevent=None
onpick.artistsdone=[]

我的问题：有人能想出一种更优雅的方式来处理这个问题吗？并且，你能想到我不会得到我期望的行为的情况吗？

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0 回答 0