Bug report

Bug summary

The interactive plot window is too small, but the text remains at the size that would be correct for a larger properly sized window.

It works if you go through pyplot:

fig, ax = plt.subplots(figsize=(6,4))
ax.plot([1,2,3])

but not in this example, which uses the pure OO interface.

The version of the plot saved to the file text.pdf is correctly sized.

Code for reproduction

from matplotlib.backends.backend_qt5agg \
     import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure

fig = Figure(figsize=(6, 4))
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
ax.plot([1, 2, 3, 2, 3, 4, 3, 4, 5])
ax.set_title('A simple plot')
ax.grid(True)
ax.set_xlabel('time')
ax.set_ylabel('volts')
canvas.print_figure('test.pdf')
canvas.show()

Actual outcome

Expected outcome

Matplotlib version

• Operating System: MacOS Sierra 10.12.5
• Matplotlib Version: 2.0.2
• Python Version: 3.6.1
• Jupyter Version (if applicable):
• Other Libraries:

Installed with conda (default)