Ok, so I've fixed it. Its just because the mouse goes outside the axes. How
do I make the change in the code?
Error: line 924 in widgets.py
old code:
x,y = event.xdata, event.ydata
fixed code:
if not event.xdata is None:
x = event.xdata
else:
x = self.prev[0]
if not event.ydata is None:
y = event.ydata
else:
y = self.prev[1]
I know it's a bit verbose, but it works.
Thanks,
Aman
On Wed, Jul 21, 2010 at 2:44 PM, Aman Thakral <aman.thak...@gmail.com>wrote:
> Update on the error.
>
> It occurs in the following cases:
> - User clicks and drags from left to right and approaches the edge of the
> right side of the axes
> - User clicks and drags from right to left and approaches the edge of the
> left side of the axes
>
> I'm working on this bug now, I'll see if I can fix it. I'll welcome any
> input you guys can provide though.
>
> Thanks,
> Aman
>
>
> On Wed, Jul 21, 2010 at 1:58 PM, Aman Thakral <aman.thak...@gmail.com>wrote:
>
>> Hi all,
>>
>> I'm getting the following exception when I use the Span Selector. It
>> happens when I try and select the entire region.
>>
>> Exception in Tkinter callback
>>
>> Traceback (most recent call last):
>> File "C:\Python26\lib\lib-tk\Tkinter.py", line 1410, in __call__
>> return self.func(*args)
>> File
>> "C:\Python26\Lib\site-packages\matplotlib\backends\backend_tkagg.py", line
>> 246, in motion_notify_event
>> FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
>> File "C:\Python26\Lib\site-packages\matplotlib\backend_bases.py", line
>> 1245, in motion_notify_event
>> self.callbacks.process(s, event)
>> File "C:\Python26\Lib\site-packages\matplotlib\cbook.py", line 165, in
>> process
>> func(*args, **kwargs)
>> File "C:\Python26\Lib\site-packages\matplotlib\widgets.py", line 952, in
>> onmove
>> self.rect.set_width(maxv-minv)
>> TypeError: unsupported operand type(s) for -: 'float' and 'NoneType'
>>
>>
>> My sample code is shown here (its also attached):
>>
>> import matplotlib.pyplot as plt
>> from matplotlib.widgets import SpanSelector
>> import numpy as np
>> import datetime
>>
>> class TimeSelector(SpanSelector):
>> """
>> SpanSelector that is only activated by the left mouse button
>> """
>> def ignore(self,event):
>> if event.button == 2 or event.button == 3: return True
>>
>> def onselect(xmin,xmax):
>> print xmin,xmax
>>
>> fig = plt.figure()
>> ax = fig.add_subplot(111)
>> span = TimeSelector(ax, onselect, 'horizontal', useblit=True,
>> rectprops=dict(alpha=0.5, facecolor='yellow') )
>>
>> y = np.random.rand(100,1)
>> start = datetime.datetime(2010,7,15,0,0)
>> x = []
>> for i in range(len(y)):
>> x.append(start + datetime.timedelta(hours=i))
>>
>> ax.plot_date(x,y,'b-')
>> plt.show()
>>
>> Any help on this issue would be greatly appreciated.
>>
>> Thanks,
>> Aman
>>
>
>
>
> --
> Aman Thakral
> B.Eng & Biosci, M.Eng Design
>
--
Aman Thakral
B.Eng & Biosci, M.Eng Design
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