1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
import numpy
from matplotlib.pyplot import figure, show
class IndexTracker:
def __init__(self, ax, X):
self.ax = ax
ax.set_title('use scroll wheel to navigate images')
self.X = X
rows,cols,self.slices = X.shape
self.ind = self.slices/2
self.im = ax.imshow(self.X[:,:,self.ind])
self.update()
def onscroll(self, event):
print event.button, event.step
if event.button=='up':
self.ind = numpy.clip(self.ind+1, 0, self.slices-1)
else:
self.ind = numpy.clip(self.ind-1, 0, self.slices-1)
self.update()
def update(self):
self.im.set_data(self.X[:,:,self.ind])
ax.set_ylabel('slice %s'%self.ind)
self.im.axes.figure.canvas.draw()
fig = figure()
ax = fig.add_subplot(111)
X = numpy.random.rand(20,20,40)
tracker = IndexTracker(ax, X)
fig.canvas.mpl_connect('scroll_event', tracker.onscroll)
show()
|
