On 07/21/2010 09:11 AM, Aman Thakral wrote:
> 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]
Good! When you make the svn diff, as requested by John, you might
change to a more typical idiom--easier to read, to my eye at least:
if event.xdata is None:
x = self.prev[0]
else:
x = event.xdata
Eric
>
> 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 <[email protected]
> <mailto:[email protected]>> 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
> <[email protected] <mailto:[email protected]>> 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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