Re: [PythonReports-users] Images

[Werner F. B. <wer...@fr...>]

On 10/02/2013 18:16, alexander smishlajev wrote:
> On 10.02.2013 15:29, Werner F. Bruhin wrote:
>>
>> expr gets saved
>
> I guess you are talking about template designer.  Sorry, I didn't 
> think of checking that.  I have modified only report building and 
> checked PDF formatting.
>
>> I keep digging through the doc etc, a pointer would obviously be very
>> welcome.
>
> The data returnded from expr is image data - same as would be returned 
> by reading an image file.
Hhm, unless I still do something wrong - quit likely, here is what I get:

Changed things to:

def getRecipeImagePNG(recid):
     """
     Return a PIL.Image instance of the first image found
     of type "Recipe finished" (fk_exttype_id=4), or an empty image

     :param str `recid`: the recipe id

     :return: Image full path or None

     """
     if recid:
         app = wx.GetApp()
         ds = app.ds
         imgF = app.getDirLocations()[5]
         with no_autoflush(ds):
             extfiler =  ds.query(db.Extfiler).filter_by(fk_recipe_id = 
recid,
fk_exttype_id = 4).first()
             if extfiler:
                 img =  Image.open(os.path.join(imgF, extfiler.filename))
             else:
                 # return a blank one if none is found
                 bDir = os.path.join(wx.GetApp().baseDir, "images")
                 bImg = os.path.join(bDir, "blankImage.jpg")

                 img = Image.open(bImg)

             buf= StringIO.StringIO()
             img.save(buf, format= 'PNG')
             temp = buf.getvalue()
             return temp

The image element is:

     <image type="png">
      <box height="30" width="75" x="374" y="50" />
      <data> expr="ru.getRecipeImagePNG(THIS.id)"</data>
     </image>


But I get this traceback:
IOError: cannot identify image file
File "c:\dev\twcbv4\twcbsrc\controllers\dreports.py", line 555, in <module>
   dlg.ShowModal()
File "c:\Python27\Lib\site-packages\wx-2.9.5-msw\wx\_windows.py", line 
805, in ShowModal
   return _windows_.Dialog_ShowModal(*args, **kwargs)
File 
"c:\Python27\Lib\site-packages\wx-2.9.5-msw\wx\lib\agw\aquabutton.py", 
line 434, in OnLeftUp
   self.Notify()
File 
"c:\Python27\Lib\site-packages\wx-2.9.5-msw\wx\lib\agw\aquabutton.py", 
line 864, in Notify
   self.GetEventHandler().ProcessEvent(evt)
File "c:\Python27\Lib\site-packages\wx-2.9.5-msw\wx\_core.py", line 
4154, in ProcessEvent
   return _core_.EvtHandler_ProcessEvent(*args, **kwargs)
File "c:\dev\twcbv4\twcbsrc\controllers\dreports.py", line 345, in 
doReportPreview
   env.report_preview()
File 
"c:\Python27\Lib\site-packages\PythonReports\editor\environment.py", 
line 263, in report_preview
   _printout = self.report_build()
File 
"c:\Python27\Lib\site-packages\PythonReports\editor\environment.py", 
line 245, in report_build
   return Builder(_template).run(_data)
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 
1459, in run
   self._build(_data_iter, _callback)
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 
1475, in _build
   self.fill_title()
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 
1634, in fill_title
   self.start_group(_group)
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 
1852, in start_group
   self.add_section(self.build_section(_title))
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 
2067, in build_section
   _section = Section(self, template, _context)
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 469, 
in __init__
   self.build(context)
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 741, 
in build
   _element.image = self.builder.image(_item)
File "c:\Python27\Lib\site-packages\PythonReports\builder.py", line 
1321, in image
   img_type=_type)
File "c:\Python27\Lib\site-packages\PythonReports\PILDrivers.py", line 
92, in fromdata
   _rv._image = Image.open(StringIO(data))
File "c:\Python27\Lib\site-packages\PIL\Image.py", line 1980, in open
   raise IOError("cannot identify image file")

And "data" in fromdata at line 92 is my expression string instead of the 
image data, as if the expression is never "run".

data
u'expr="ru.getRecipeImagePNG(THIS.id)"'

Hope I am clear and not doing something stupid.  Anyhow it is late, I 
will look at this again tomorrow.

Werner