[Qgis-developer] Compiling ui files with custom widgets creates wrong imports

[Lauri Kajan]

Hi Denis,

Unfortunately this seems not to be enough.
If pythonpath is set pyuic4 still produces wrong import.

Here's my environment and command to compile ui file
with QgsMapLayerComboBox.
------------------
C:\OSGeo4W64>echo %PATH%
C:\OSGEO4~1\apps\qgis-dev\bin;C:\OSGEO4~1\apps\Python27\Scripts;C:\OSGEO4~1\bin;
C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\WBem;C:\OSGEO4~1\apps\msys\bin

C:\OSGeo4W64>echo %PYTHONPATH%
C:\OSGEO4~1\apps\qgis-dev\python

C:\OSGeo4W64>pyuic4 test_widget.ui -o test_widget.py
-----------------

In the compiled test_widget.py there's still a line:
from qgsmaplayercombobox import QgsMapLayerComboBox


Paths should be set correctly because importing qgis.gui works ok from
python started from the same environment.


PyQt and pyuic4 reads custom witget definitions
from C:\OSGeo4W64\apps\Python27\Lib\site-packages\PyQt4\uic\widget-plugins.
I think that PyQt is not aware
of C:\OSGeo4W64\apps\qgis-dev\python\PyQt4\uic\widget-plugins folder.


This is not a problem of only pyuic4.
Also all plugins that use custom qgis widgets and try to import ui files
directly in their code using the uic.loadUiType() function crashes on
windows!



-Lauri

On Tue, Sep 22, 2015 at 8:05 AM, Denis Rouzaud <denis.rouzaud at gmail.com>
wrote:

> Hi all,
>
>
> The path that must be specified as PYTHONPATH is
> QGIS_PREFIX_PATH/share/qgis/python
>
> All the custom widgets have their classes in qgis gui. Therefore, you
> just need to add the QGIS python path to PYTHONPATH to be able to define
> properly their import.
>
> As Jürgen said there might be several versions of QGIS installed (i.e.
> different versions of the custom widgets library), hence the PYTHONPATH
> can't be set automatically.
>
> Denis
>
>
>
> On 09/19/2015 03:16 PM, Lauri Kajan wrote:
> > Hi Jürgen!
> >
> > I think that this can't be fixed by just setting the PYTHONPATH.
> >
> > If I have understood right the problem is that PyQt and its uic module
> > can't find qgis_customwidgets.py or better said
> > 'qgis-dev\python\PyQt4\uic\widget-plugins' directory because it is not
> > told to do so. It is not that some module can't be imported because it
> > is not in pythonpath. Please correct me if I'm wrong.
> >
> > Directories that are searched for widget plugins by PyQt4 are defined in
> > uic.widgetPluginPath. I have not found any environment variable where
> > this list can be altered.
> > After I appended
> > "C:\OSGeo4W64\apps\qgis-dev\python\PyQt4\uic\widget-plugins" to the
> > widgetPluginPath list I'm able to use uic.loadUiType function inside
> > python. Still that doesn't solve the problem with pyuic4 because
> > widgetPluginPath can't be set externally.
> >
> >
> > -Lauri
> >
> >
> >
> > On Sat, Sep 19, 2015 at 12:47 PM, Jürgen E. <jef at norbit.de
> > <mailto:jef at norbit.de>> wrote:
> >
> >     Hi Lauri,
> >
> >     On Sat, 19. Sep 2015 at 12:11:11 +0300, Lauri Kajan wrote:
> >     > The actual problem might be that
> >     >
> C:\OSGeo4W64\apps\qgis-dev\python\PyQt4\uic\widget-plugins\qgis_customwidgets.py
> >     > file is not found by pyuic4.
> >     > After I copied that file
> >     > to
> C:\OSGeo4W64\apps\Python27\Lib\site-packages\PyQt4\uic\widget-plugins
> >     > everything works ok.
> >     >
> >     > Is this a osgeo4w bug or could this be fixed by us?
> >
> >     > Should the qgis postinstall bat copy qgis_customwidgets.py file to
> the
> >     > right place?
> >
> >     No, qgis-dev might not be the only installed version - so you have
> >     to setup the
> >     PYTHONPATH to use the version you target.
> >
> >
> >     Jürgen
> >
> >     --
> >     Jürgen E. Fischer           norBIT GmbH             Tel.
> >     +49-4931-918175-31 <tel:%2B49-4931-918175-31>
> >     Dipl.-Inf. (FH)             Rheinstraße 13          Fax.
> >     +49-4931-918175-50 <tel:%2B49-4931-918175-50>
> >     Software Engineer           D-26506 Norden
> >      http://www.norbit.de
> >     QGIS release manager (PSC)  Germany                    IRC: jef on
> >     FreeNode
> >
> >     _______________________________________________
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