[GRASS-dev] [GRASS GIS] #3502: v.proj location not set in dialog

[GRASS GIS]

#3502: v.proj location not set in dialog
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  Reporter:  balagates  |      Owner:  grass-dev@…
      Type:  defect     |     Status:  new
  Priority:  normal     |  Milestone:  7.2.4
 Component:  wxGUI      |    Version:  7.4.0
Resolution:             |   Keywords:  v.proj location
       CPU:  OSX/Intel  |   Platform:  MacOSX
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Comment (by balagates):

 On my Mac running macOS 10.12.6 I installed the pre-built Grass 7.6.0 app
 linked on the Grass download page.  Within the Grass app it reports Python
 2.7.15 and wxPython 4.0.3.  The GUI for v.proj still seems to have the
 same problem and maybe an additional new problem.  From the main GUI menu
 I select "File -> Import Vector Data -> Reproject vector map from
 different GRASS location [v.proj]".  A window appears with the Source tab
 selected and 3 combo boxes (Location, Mapset, Name).  The pull-down for
 the Location ComboBox is populated with values I expect.  Selecting one
 from the pull-down does not set the location.  At the bottom of the
 windows is the assembled command line and after making a selection from
 the pull-down is says "v.proj location=<required>".  If instead of
 selecting the value from the ComboBox pulldown I type in location (or do
 some manual edits on the one I pulled down, the location gets set.

 So my guess is when selecting a ComboBox on macOS wxPython is generating a
 wx.EVT_COMBOBOX event but not a wx.EVT_TEXT event.  Since Grass 7.2 there
 have been several changes in forms.py changing bindings from
 wx.EVT_COMBOBOX to wx.EVT_TEXT with resulting loss of functionality on
 macOS.  Since it appears to work on my Ubuntu machine the events generated
 for a ComboBox must be different.  I haven't studied wxPython to see what
 events we expect when a ComboBox selection is made.  To me it does make
 more sense that when making a ComboBox selection a wx.EVT_COMBOBOX would
 be generated.  It is not so obvious that a wx.EVT_TEXT would get
 generated...but maybe it will?  I do not know enough now to know what
 should be robust.

 Note also that some changes in Grass 7.4.3 forms.py appear to have caused
 similar problems with the Mapset ComboBox selection.  I am still studying
 that but the symptoms are the same.  Selecting a value from the ComboBox
 pulldown does nothing, but typing in a Mapset name in the field sets it
 values and populates the Name ComboBox.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3502#comment:5>
GRASS GIS <https://grass.osgeo.org>