Zooming and Panning
Zooming and Panning#
%matplotlib widget import matplotlib.pyplot as plt from mpl_interactions import ioff, panhandler, zoom_factory
Load a sample image#
# A sample image image = plt.imread( "https://github.com/matplotlib/matplotlib/raw/v3.3.0/lib/matplotlib/mpl-data/sample_data/ada.png" )
enable scroll to zoom#
Originally based on https://gist.github.com/tacaswell/3144287.
To use just pass the axis object to the zoom factory function. Here I also demonstrate using
ioff() as a context manager, so we can control where the figure canvas shows up.
with ioff: fig, ax = plt.subplots() ax.imshow(image) disconnect_zoom = zoom_factory(ax) display(fig.canvas)
Scrolling and panning#
I like being able to pan by clicking with the mouse without having to click the toolbar. Below is an example demonstrating the
panhandler object. It allows scrolling using the middle mouse button, but with the
button argument, you can change that to any mouse button. You need to make sure to assign the panhanler to a variable otherwise it will be garbage collected and will not work.
pan_handler = panhandler(fig) display(fig.canvas)
It’s also possible to manually enable and disable the