Automatic dark filter for plots

[jmcphers]

Positron's dark themes don't extend to the Plots pane, because plots are images generated from matplotlib, ggplot, etc. Consequently it's not unusual to see a bright white plot in an otherwise dark-themed Positron. It is possible to set the plotting libraries to generate dark-themed plots, but this usually requires some level of effort and skill with the individual plotting library.

When preparing plots for publication, you probably want them to have their true colors, but for exploratory data analysis, the plots could Just Look Nice in Positron with some judicious use of CSS color filters.

(From a conversation with @cscheid at Work Week)

[testlabauto]

Verified Fixed

Positron Version(s) : 2025.03.0-11
OS Version          : OSX

Test scenario(s)

Validated with

import pandas as pd
import matplotlib.pyplot as plt
data_dict = {'name': ['p1', 'p2', 'p3', 'p4', 'p5', 'p6'],
				'age': [20, 20, 21, 20, 21, 20],
				'math_marks': [100, 90, 91, 98, 92, 95],
				'physics_marks': [90, 100, 91, 92, 98, 95],
				'chem_marks': [93, 89, 99, 92, 94, 92]
				}

df = pd.DataFrame(data_dict)

df.plot(kind='scatter',
		x='math_marks',
		y='physics_marks',
		color='red')

plt.title('ScatterPlot')
plt.show()

Link(s) to TestRail test cases run or created: