Figure Size & Position After Matplotlib Zoom

I have a matplotlib image plot within a wxPython panel that I zoom in on using the native matplotlib toolbar zoom. Having zoomed in I wish to know the size of the resulting image

Solution 1:

You may want to read the following from the matplotlib doc:

• Event handling and picking
• Transformations tutorial

However, especially the transformations tutorial may take a while to wrap your head around. The transformation system is very efficient and complete, but it may take you a while to figure out what especially it is you do need.

However in your case maybe the following code snippet could be sufficient:

from matplotlib import pyplot as plt
import numpy

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(numpy.random.rand(10))

defondraw(event):
    # print 'ondraw', event# these ax.limits can be stored and reused as-is for set_xlim/set_ylim laterprint ax.get_xlim(), ax.get_ylim()

cid = fig.canvas.mpl_connect('draw_event', ondraw)

plt.show()

In the draw event you can get your axes limits, calculate a scaling and whatnot and can use it as-is later on to set the ax to the desired zoom level.