Closed
Description
Bug report
Bug summary
On Linux, the command 'plt.waitforbuttonpress' leads on systems with a qt5 backend to the warning
QTimer::singleShot: Timers cannot have negative timeouts
Code for reproduction
# Paste your code here
import matplotlib.pyplot as plt
plt.waitforbuttonpress()Actual outcome
Python 3.7.4 (default, Aug 13 2019, 20:35:49)
[GCC 7.3.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib.pyplot as plt
>>> plt.waitforbuttonpress()
QTimer::singleShot: Timers cannot have negative timeouts
True
>>> ```
**Expected outcome**
no warning
**Matplotlib version**
<!--Please specify your platform and versions of the relevant libraries you are using:-->
* Operating system: Linux
* Matplotlib version: 3.1.1
* Matplotlib backend (`print(matplotlib.get_backend())`):Qt5Agg
* Python version: 3.7.4
* Jupyter version (if applicable):
* Other libraries:
<!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda-->
<!--If you installed from conda, please specify which channel you used if not the default-->