CODEWITHSUNDEEP
pythonmatplotlib
ntmt
ntmt

Reputation: 173

Matplotlib zoom-in-rectangle: drawing across subplots/outside axis

is there a way to create a zoom-in-rectangle that draws across subplots or outside the axis? The current matplotlib navigation zoom-in-rectangle allows you to click and drag the rectangle within one axis at a time, but I want the option to extend the dash rectangle wherever the mouse is.

Upvotes: 0

Views: 1676

Answers (1)

ImportanceOfBeingErnest
ImportanceOfBeingErnest

Reputation: 339240

The idea can be to create a new axes which fills the entire figure and make it transparent. You can then use a rectange selector for that axes.

enter image description here

from matplotlib.widgets import RectangleSelector
import numpy as np
import matplotlib.pyplot as plt


fig, axes = plt.subplots(2,2)
for ax in axes.flat:
    ax.scatter(np.random.rand(7), np.random.rand(7), c=np.random.rand(7))

def select(eclick, erelease):
    x1, y1 = eclick.xdata, eclick.ydata
    x2, y2 = erelease.xdata, erelease.ydata
    pass

overax = fig.add_axes([0,0,1,1])
overax.patch.set_alpha(0)
overax.axis("off")

rs = RectangleSelector(overax, select,
                       drawtype='box', useblit=True,
                       button=[1, 3],
                       minspanx=5, minspany=5,
                       spancoords='pixels',
                       interactive=True)

plt.show()

Upvotes: 1

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