[IPython-dev] Camera widget

Doug Blank doug.blank@gmail....
Wed Feb 26 20:00:22 CST 2014


Thanks for the hint... I did not know about that hard reset. However, this
is looking like an error. After a reset, in the console:

View creation failed
Backbone.Model.extend.constructor {widget_manager: WidgetManager,
_buffered_state_diff: Object, pending_msgs: 0, msg_buffer: null,
key_value_lock: null…}
manager.js:83

Exception in Comm callback
TypeError {stack: "TypeError: Cannot read property '$el' of null↵
…min.js?v=ccd0edd113b78697e04fb5c1b519a5cd:4:5488)", message: "Cannot read
property '$el' of null"}

message: "Cannot read property '$el' of null"
stack: "TypeError: Cannot read property '$el' of null↵ at
WidgetManager._handle_display_view (
http://127.0.0.1:8888/static/widgets/js/manager.js:97:58)↵ at
WidgetManager.display_view (
http://127.0.0.1:8888/static/widgets/js/manager.js:87:26)↵ at
Backbone.Model.extend._handle_comm_msg (
http://127.0.0.1:8888/static/widgets/js/widget.js:85:41)↵ at x.isFunction.i
(
http://127.0.0.1:8888/static/components/jquery/jquery.min.js?v=ccd0edd113b78697e04fb5c1b519a5cd:4:5488)↵
at Comm._maybe_callback (
http://127.0.0.1:8888/static/services/kernels/js/comm.js?v=f6acfac4110c05a2d4985876fb49765a:177:17)↵
at Comm.handle_msg (
http://127.0.0.1:8888/static/services/kernels/js/comm.js?v=f6acfac4110c05a2d4985876fb49765a:185:14)↵
at CommManager.comm_msg (
http://127.0.0.1:8888/static/services/kernels/js/comm.js?v=f6acfac4110c05a2d4985876fb49765a:116:18)↵
at x.isFunction.i (
http://127.0.0.1:8888/static/components/jquery/jquery.min.js?v=ccd0edd113b78697e04fb5c1b519a5cd:4:5488)↵
at Kernel._handle_iopub_message (
http://127.0.0.1:8888/static/services/kernels/js/kernel.js?v=6af87c42924701bcbf66ba75f4975cec:573:13)↵
at WebSocket.x.isFunction.i (
http://127.0.0.1:8888/static/components/jquery/jquery.min.js?v=ccd0edd113b78697e04fb5c1b519a5cd:4:5488
)"
__proto__: Error

-Doug

On Wed, Feb 26, 2014 at 8:32 PM, Sylvain Corlay <sylvain.corlay@gmail.com>wrote:

> Hi Doug,
> I have experienced this kind of problems with widgets not being rendered
> because of caching issues of Chrome. Even after deleting the cache, some
> javascript files are still not updated to the last version.
> The fix for me is to
>  -open the developer tools (Crtl + Shift + J)
>  -right-click on the reload button of the page
>  -choose *"Empty Cache and Hard Reload*".
> Another solution which only works when the developer tools are kept open
> is to check "*Disable cache (while DevTools is open)*" in the developer
> tools options.
> Best,
> Sylvain
>
>
> On Wed, Feb 26, 2014 at 8:02 PM, Doug Blank <doug.blank@gmail.com> wrote:
>
>> On Wed, Feb 26, 2014 at 6:13 PM, Jason Grout <jason-sage@creativetrax.com
>> > wrote:
>>
>>> On 2/26/14 4:25 PM, Doug Blank wrote:
>>> > Jason, thank you very much for sharing this!
>>> >
>>> > So, I am testing this with IPython 2.0.0-dev master, and after three
>>> > clicks, it no longer updates the imageurl field. The picture continues
>>> > to be updated in the view, both live, and when the picture is taken.
>>> But
>>> > it appears that the data is no longer being sent to the kernel.
>>> >
>>> > I have a feeling that this is because the frontend is not receiving a
>>> > proper message back from the kernel (because auto throttling kicks in).
>>> > This is my guess, anyway.
>>> >
>>> > Can you verify that you are also having this issue, and perhaps suggest
>>> > what could be the matter.
>>>
>>> I'm running pretty close to master, and don't see it with this updated
>>> version:
>>>
>>> http://nbviewer.ipython.org/gist/jasongrout/9210458
>>>
>>> (I didn't double-check the version I sent out earlier just now...it's
>>> possible that one of the changes I made in the sagecell tweaks included
>>> in the above version fixed the issue you are having)
>>>
>>>
>> I'm seeing strange behavior in the latest pull (from today's changes in
>> master) with all of the custom widgets. For example, the widgets in "Part 6
>> Custom Widgets" in the examples are not rendering anymore.
>>
>> Any one else seeing that? Perhaps I need to recreate my profiles? The
>> Camera widget no longer shows as well.
>>
>> -Doug
>>
>>
>>>  Thanks,
>>>
>>> Jason
>>>
>>> _______________________________________________
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>>> IPython-dev@scipy.org
>>> http://mail.scipy.org/mailman/listinfo/ipython-dev
>>>
>>
>>
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