[Qgis-developer] QGIS Custom Widget in Qt Designer

[Alessandro Pasotti]

On Thu, Dec 8, 2016 at 7:42 AM, Denis Rouzaud <denis.rouzaud at gmail.com>
wrote:

>
>
> On 12/07/2016 08:45 PM, Marco Bernasocchi wrote:
>
> Hi Denis,
> I was just put of by the fact that the xml tag is called customwidget.
>
> They are in fact promotet widgets. And I really wonder how this can work.
>
> Could you try the resource sharing plugin. Does it work for you?
>
>
> Well, it made QGIS crash upon installation.
> And now QGIS doesn't start anymore:
>
> I get Warning: Object::connect: No such signal QWebPage::loadProgress(int)
> And then a seg fault....
>
> No real time to investigate...but probably due to the fact that I compiled
> without QtWebKit.
>
>
>
In that case, we might need to add a stub to the compatibility
https://qgis.org/api/classQgsWebView.html and use that class in the plugin
instead of QWebView.

This should at least solve the crash.



>
> Ciao
>
>
>
> On 8 December 2016 02:16:55 GMT+13:00, Rouzaud Denis
> <denis.rouzaud at gmail.com> <denis.rouzaud at gmail.com> wrote:
>>
>> Hi Marco,
>>
>> This doesn’t sound like a QGIS custom widget issue since QWebView is not
>> related to QGIS.
>> It seems that QWebView is well defined in PyQt4 compatibility layer [0].
>> The issue is probably that you try to run system uic instead of
>> qgis.PyQt.uic.
>>
>> This make me thunk of the reply to Matteo as well….try to run
>> qgis.PyQt.uic instead of uic
>>
>> I hope this helps
>>
>> Denis
>>
>> [0] https://github.com/qgis/QGIS/blob/release-2_18/python/
>> PyQt/PyQt4/QtWebKitWidgets.py#L32
>>
>>
>>
>>
>> On 7 Dec 2016, at 12:51, Marco Bernasocchi <marco at opengis.ch> wrote:
>>
>> Salut Denis,
>>
>> I'm a bit lost, I see in plugins like the resources sharing tool [0]
>>
>> <customwidgets>
>>  <customwidget>
>>   <class>QWebView</class>
>>   <extends>QWidget</extends>
>>   <header>QtWebKitWidgets/QWebView</header>
>>  </customwidget>
>> </customwidgets>
>>
>> and when I install the plugin I see:
>>
>> This plugin is broken
>> No module named QtWebKitWidgets.QWebView
>>
>> this plugins also use the uic.loadUi approach
>>
>> I've qgis installed from packages and also self build:
>> marco at placebo:~/dev/QGIS/master/python/custom_widgets$ locate
>> libqgis_customwidgets.so
>> /usr/lib/x86_64-linux-gnu/qt4/plugins/designer/libqgis_customwidgets.so
>> /usr/lib/x86_64-linux-gnu/qt4/plugins/designer/libqgis_
>> customwidgets.so.2.18.1
>> marco at placebo:~/dev/QGIS/master/python/custom_widgets$ locate
>> qgis_customwidgets.py
>> /home/marco/dev/QGIS/master/python/custom_widgets/qgis_customwidgets.py
>> /home/marco/gis_data/pacsafe/QGIS/python/custom_widgets/
>> qgis_customwidgets.py
>> /usr/lib/python2.7/dist-packages/PyQt4/uic/widget-
>> plugins/qgis_customwidgets.py
>> /usr/lib/python2.7/dist-packages/PyQt4/uic/widget-
>> plugins/qgis_customwidgets.pyc
>>
>>
>>
>> Am I missing some magic somewhere? QtWebKitWidgets exists only from Qt5.
>> in Qt4 it should still be QtwebKit.
>>
>> ciao
>> Marco
>>
>>
>> [0]
>> https://github.com/akbargumbira/qgis_resources_
>> sharing/blob/master/resource_sharing/gui/ui/resource_
>> sharing_dialog_base.ui#L598
>>
>>
>> On 07.12.2016 22:58, Denis Rouzaud wrote:
>>
>> Hi Matteo,
>>
>> The file is not present simply because you did not install QGIS.
>>
>> See here https://github.com/qgis/QGIS/blob/master/python/CMakeLists.
>> txt#L287
>>
>>
>> Having it documented somewhere would be nice:
>>
>> * Approach when installing
>>
>> * Without installing: were to put libqgis_customwidget and
>> qgis_customwidgets.py, how to run pyuic.
>>
>>
>> Cheers,
>>
>> Denis
>>
>> On 12/07/2016 10:41 AM, matteo wrote:
>>
>> Hold on.. I should have manage it..
>>
>> I discovered that my machine was missing the file
>>
>> qgis_customwidgets.py
>>
>> in the folder
>>
>> /usr/lib/python2.7/dist-packages/PyQt4/uic/widget-plugins/
>>
>>
>> in another machine I found that file and I copied it in the right folder
>> (the above one) and now it seems working, that is the plugin with the
>> custom widget is now correctly loaded without any more issues..
>>
>> So many thanks Denis for the assistance..
>>
>>
>> My question is now.. why was that file missing in the folder?
>> In the other machine I ran Ubuntu and I was used to compile QGIS with
>> debian rules.
>> In this new machine I compile QGIS with make and run it directly from
>> the output folder (so QGIS has never been installed with repository
>> packages and/or deb files, don't know if this could be related to the
>> problem)
>>
>> I have some confusion on my mind..
>>
>> If this is worth I can put this solution (if you think it is a solution
>> and not a workaround) somewhere in the website or another place so that
>> other people facing the same problem could solve the issue.
>>
>> Many many thanks to all
>>
>> Matteo
>>
>>
>>
>>
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>>
>> --
>> Marco Bernasocchi
>> OPENGIS.ch - berna.io - 27summits.ch
>>
>>
>>
> --
> Marco Bernasocchi (mobile).
> OPENGIS.ch - berna.io - 27summits.ch
>
>
>
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-- 
Alessandro Pasotti
w3:   www.itopen.it
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