Bug report

Bug summary

The home, backward, and forward buttons in the UI do nothing when the plot is three dimensional. Also the zoom button does not work at all. It simply rotates the plot.

Code for reproduction

From the examples,

from mpl_toolkits.mplot3d import axes3d
import matplotlib.pyplot as plt
from matplotlib import cm

fig = plt.figure()
ax = fig.gca(projection='3d')
X, Y, Z = axes3d.get_test_data(0.05)

cset = ax.contourf(X, Y, Z, cmap=cm.coolwarm)
ax.clabel(cset, fontsize=9, inline=1)

plt.show()

Actual outcome

Buttons don't work.

Expected outcome

Buttons would work.

Matplotlib version

• Operating system: macOS 10.13.4
• Matplotlib version: 2.2.2
• Matplotlib backend (print(matplotlib.get_backend())): Qt5Agg
• Python version: 3.6
• Jupyter version (if applicable): n/a
• Other libraries: n/a

Python and matplotlib installed via pip in a virtualenv.