Short description

When adding a legend to a plot, the legend and the plot contents overlap. An example out of an application I'm building:

Code to reproduce

import pyqtgraph as pg
import numpy as np

plot = pg.plot().getPlotItem()
plot.addLegend()

x = np.arange(50)
y = np.cos(x / 100) * 3
item = pg.BarGraphItem(x=x, height=y, width=0.8, pen="w")

plot.addItem(item)
plot.legend.addItem(item, 'bar')

input("Press enter to quit")

Expected behavior

I could imagine multiple possible fixes:

1. Make the legend opaque
2. Automatically zoom out a little to make space for the legend

Real behavior

The legend simply appears on the top left, without any consideration whether it overlaps with the plot.

Tested environment(s)

• PyQtGraph version: 0.11.0rc0
• Qt Python binding: PyQt5 5.14.2 Qt 5.14.2
• Python version: 3.8.3
• NumPy version: 1.17.4
• Operating system: Arch Linux
• Installation method: pip