Hello list,
I'm encountering a strange problem with the RectangleSelector using the latest
version of svn. Namely it doesn't work if it wasn't initialized as
RS = RectangleSelector(...)
but using
RectangleSelector(...)
in my script.
I modified the example rectangle_selector.py from the folder examples/widgets
to illustrate my observation.
Can anybody reproduce my findings or even explain what is going on?
Thanks in advance for any comments.
Kind regards,
Matthias
"""
Do a mouseclick somewhere, move the mouse to some destination, release
the button. This class gives click- and release-events and also draws
a line or a box from the click-point to the actual mouseposition
(within the same axes) until the button is released. Within the
method 'self.ignore()' it is checked wether the button from eventpress
and eventrelease are the same.
"""
from matplotlib.widgets import RectangleSelector
import numpy as np
import matplotlib.pyplot as plt
def line_select_callback(eclick, erelease):
'eclick and erelease are the press and release events'
x1, y1 = eclick.xdata, eclick.ydata
x2, y2 = erelease.xdata, erelease.ydata
print "(%3.2f, %3.2f) --> (%3.2f, %3.2f)" % (x1, y1, x2, y2)
print " The button you used were: ", eclick.button, erelease.button
def toggle_selector(event):
print ' Key pressed.'
if event.key in ['Q', 'q'] and toggle_selector.RS.active:
print ' RectangleSelector deactivated.'
toggle_selector.RS.set_active(False)
if event.key in ['A', 'a'] and not toggle_selector.RS.active:
print ' RectangleSelector activated.'
toggle_selector.RS.set_active(True)
current_ax = plt.subplot(111) # make a new plotingrange
N = 100000 # If N is large one can see
x = np.linspace(0.0, 10.0, N) # improvement by use blitting!
plt.plot(x, +np.sin(.2*np.pi*x), lw=3.5, c='b', alpha=.7) # plot something
plt.plot(x, +np.cos(.2*np.pi*x), lw=3.5, c='r', alpha=.5)
plt.plot(x, -np.sin(.2*np.pi*x), lw=3.5, c='g', alpha=.3)
print "\n click --> release"
# drawtype is 'box' or 'line' or 'none'
#toggle_selector.RS =
#RS =
RectangleSelector(current_ax, line_select_callback,
drawtype='box', useblit=True,
button=[1,3], # don't use middle button
minspanx=5, minspany=5,
spancoords='pixels')
#plt.connect('key_press_event', toggle_selector)
plt.show()
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