In [1]:

    

import IPython
import ipywidgets
import numpy as np

import image_attendant as imat
import jpy_canvas


    

In [6]:

    

image = imat.read('images/mini_2.jpg')
image_b = imat.rebin(image, 0.25)  

H,W = image.shape[:2]

L = 20
L2 = L*2 + 1


    

In [7]:

    

wid_img = jpy_canvas.Canvas(image)
wid_sub = jpy_canvas.Canvas(image_b)

wid_img.width = W
wid_img.height = H

# wid_sub.width = L2*3
# wid_sub.height = L2*3


wid_box = ipywidgets.HBox([wid_img, wid_sub])

wid_box


    

In [14]:

    

wid_sub.width=300


    

In [12]:

    

wid_sub.layout.border='black'


    

In [11]:

    

def work_function(wid, event):
    """Mouse motion event handler
    """
    i = event['canvasX']    
    i0 = i-L
    i1 = i+L+1

    j = event['canvasY']
    j0 = j-L
    j1 = j+L+1

    if i0 < 0:
        i0 = 0
        
    if j0 < 0:
        j0 = 0
        
    crop = wid.data[j0:j1, i0:i1]
#     print(i0,i1,j0,j1)
#     print(crop.shape)
    with wid_sub.hold_sync():
        wid_sub.data = crop
        wid_sub.width = crop.shape[1]*5
        wid_sub.height = crop.shape[0]*5

wid_img.register_move(work_function)


    

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