[GRASS-dev] Re: [GRASS GIS] #671: wxgui: v.distance to_column option inaccessible

[GRASS GIS]

#671: wxgui: v.distance to_column option inaccessible
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  Reporter:  mlennert  |       Owner:  martinl             
      Type:  defect    |      Status:  assigned            
  Priority:  major     |   Milestone:  6.4.0               
 Component:  wxGUI     |     Version:  6.4.0 RCs           
Resolution:            |    Keywords:  v.distance to_column
  Platform:  Linux     |         Cpu:  Unspecified         
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Changes (by martinl):

 * cc: grass-dev at lists.osgeo.org (added)
  * owner:  grass-dev at lists.osgeo.org => martinl
  * status:  new => assigned

Comment:

 The reason is that the module contains more {{{G_OPT_V_FIELD}}} parameters
 - in this case 'from_layer' and 'to_layer'. There is no way how to
 determine what layer is connected with 'to_column' paramater. Generally
 speaking all modules which have more 'layer/table/database/...' parameters
 are affected. The current approach is simple: e.g. update all
 {{{G_OPT_DB_COLUMN}}} parameters when {{{G_OPT_V_FIELD}}} parameter value
 is changed.

 I am not sure how to solve this problem. One approach could be to add new
 attribute to the {{{Option}}} structure to track special dependencies. In
 the case of v.select:

 {{{
 to_field->guidep = to_column;
 }}}

 Any ideas?

 Martin

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Ticket URL: <http://trac.osgeo.org/grass/ticket/671#comment:1>
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