John Hunter wrote:
> On Wed, Nov 26, 2008 at 10:41 AM, Drain, Theodore R
> <[EMAIL PROTECTED]> wrote:
>
>
>> I'm pretty sure this is exactly what's happening. This is also
>> annoying when you're trying to use a zoom rectangle and want to start
>> at some point in the plot and drag it to the boundary. We've been
>> planning on putting some time in to fix this this but just haven't
>> been able to make the time yet.
>>
>> I think one possible solution is that anytime the mouse moves outside
>> the axes, it should get one last event that is at the boundary which
>> would require tracking which axes the last event was sent in. We
>> haven't tried to see how hard that is to implement thought...
>>
>
> probably fairly easy using a class level attr in the MouseEvent.
> Another possibility would be to add support for figure_enter_event,
> figure_leave_event, axes_enter_event, axes_leave_event. The user code
> would have to separately process the axes_leave_event but this might
> be the cleanest solution. I am happy to add support for these ...
>
John,
in my code, I implemented tests like:
if self.valmin is not None:
if val < self.valmin:
val = self.valmin
which makes limit handling better than that of the Slider class this was
based on:
if self.slidermin is not None:
if val<=self.slidermin.val: return
Theodore nailed what is happening. At the moment, tests like the one I
used cannot be implemented because event.xdata returns None when outside
the boundaries. This cannot be compared with ax.get_xlim().
Maybe a value should be returned even when outside. the event.inaxes
should be enough to know if the mouse pointer is inside or outside.
Although that would probably break a few things that at the moment
depend on event.xdata being None when outside!
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