Description
Bug report
Bug summary
In this interactive code, the "pick_event" is used to connect clicks on the x-label, legend's items,
and to react when the annotation is dragged. This was working up to matplotlib 2.2.3.
Since matplotlib 3.0, these behaviors are disrupted.
The problem is in the definition of the arrowprops. When I comment the line with arrowprops,
the code works again. Unfortunately, I loose the stem of the annotation.
Code for reproduction
#!/usr/bin/env python
import matplotlib.pyplot as plt
import numpy as np
def onpick(event):
print(event.artist)
fig, ax = plt.subplots()
fig.canvas.mpl_connect('pick_event', onpick)
x = np.arange(10)
blueline = ax.plot(x, x * 2 + 10, color='blue', label='blue line')
redline = ax.plot(x, np.sqrt(x), color='red', label='red line')
annotation = ax.annotate("note", xy=(0.15,0.5), xytext=(0.15,0.2),
xycoords ='axes fraction', textcoords = 'axes fraction',
arrowprops=dict(edgecolor='purple',alpha=0.4,arrowstyle='-') # Offending line
)
annotation.draggable()
ax.set_xlabel('X', picker=True)
legend = ax.legend(fancybox=True)
for legline in legend.get_lines():
legline.set_picker(5)
plt.show()Actual outcome
Traceback (most recent call last):
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/cbook/__init__.py", line 215, in process
func(*args, **kwargs)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/backend_bases.py", line 1675, in pick
self.figure.pick(mouseevent)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/artist.py", line 447, in pick
a.pick(mouseevent)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/axes/_base.py", line 4141, in pick
martist.Artist.pick(self, args[0])
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/artist.py", line 447, in pick
a.pick(mouseevent)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/artist.py", line 429, in pick
inside, prop = picker(self, mouseevent)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/offsetbox.py", line 1698, in artist_picker
return self.ref_artist.contains(evt)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/text.py", line 2184, in contains
contains, tinfo = Text.contains(self, event)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/text.py", line 213, in contains
l, b, w, h = self.get_window_extent().bounds
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/text.py", line 2359, in get_window_extent
self.update_positions(renderer)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/text.py", line 2215, in update_positions
self._update_position_xytext(renderer, xy_pixel)
File "/Users/dfadda/anaconda3/lib/python3.6/site-packages/matplotlib/text.py", line 2298, in _update_position_xytext
pad = renderer.points_to_pixels(4)
AttributeError: 'NoneType' object has no attribute 'points_to_pixels'
Expected outcome
Up to matplotlib version 2.2.3, when clicking:
-
the 'X' label
-
an item in the legend
-
the annotation 'note'
the onpick function was called and the event.artist was printed.
The annotation was also draggable.
In version 3.0, all this does not work anymore, producing the output on the screen described.
When commenting the line with "arrowprops", the previous behavior is restaured.
Unfortunately, when doing so, it is not possible to trace the connection with the note.
Matplotlib version
- Operating system: mac osx
- Matplotlib version: 3.0 (it was working up to version 2.2.3)
- Matplotlib backend (
print(matplotlib.get_backend())): Qt5Agg - Python version: 3.6
- Jupyter version (if applicable):
- Other libraries:
Matplotlib was installed with conda, default channel.