[GRASS-dev] Re: [GRASS GIS] #1601: output map GUI pulldown broken

GRASS GIS trac at osgeo.org
Thu Mar 15 17:38:16 EDT 2012

#1601: output map GUI pulldown broken
 Reporter:  cmbarton     |       Owner:  grass-dev@…              
     Type:  defect       |      Status:  new                      
 Priority:  normal       |   Milestone:  7.0.0                    
Component:  wxGUI        |     Version:  svn-trunk                
 Keywords:  GUI parser   |    Platform:  Unspecified              
      Cpu:  Unspecified  |  

Comment(by cmbarton):

 Here is some more information:

 This error affects any module that has 'input' and 'output' argument and
 where the 'output' argument is a map. Example modules include r.patch,
 r.to.vect, and v.to.rast.

 Trying to select a map for output raises an error

 GRASS 7.0.svn (Global_latlon):~ > Traceback (most recent call last):
 line 198, in GetStringValue
     return ','.join(self.value)
 TypeError: sequence item 1: expected string or Unicode, TreeItemId found

 Here is what I've traced so far.

 For input and output, GetStringValue is called twice during a map
 selection to return self.value, which it can join to other strings with a
 comma in the case of multiple inputs. self.value is supposed to be the map
 name. Both times GetStringValue is called for the input selection, it
 returns the map name.

 But for the output selection, it returns only the map name the first time,
 and then returns <map name>,<tree item> the second time. since the tree
 item is not a string, it raises this error.

 I'm still trying to find my way through the new code reorganization. My
 guess is that the problem probably lies in forms.py and maybe an incorrect
 call to OnUpdateSelection (at least input does NOT call OnUpdateSelection
 and output DOES call OnUpdateSelection). It could still be in select.py,
 but both input and output call select.py and there is only an error with

 The same thing happens whether output is a vector or a raster. Other kinds
 of output, like files, don't seem to be affected. I hope the detective
 work I've done so far helps.

Ticket URL: <http://trac.osgeo.org/grass/ticket/1601#comment:1>
GRASS GIS <http://grass.osgeo.org>

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