[wxPython-users] Grid Cell Renderer

[Mark Erbaugh]

On Wed, 2008-01-02 at 17:00 -0800, Robin Dunn wrote:
> Mark Erbaugh wrote:
> > On Wed, 2008-01-02 at 06:58 +0100, Raffaello Barella wrote:
> >> Could you please tell what kinds of data you want to convert to a
> >> string?
> >>
> 
> > 
> > The data is an integer that corresponds to the string. I have a dict
> > that has the integer as the key and the string as the value.
> > 
> > wxPython has a GridCellEnumRenderer but I can't seem to get that working
> > and other than it's existence, I can't find any documentation on it.
> > It's not listed in the wxWidgets documentation, although it is there in
> > the C++ code.
> 
> If you really want to keep the integer values all the way through then 
> try implementing GetValueAsLong(self, row, col) in the table, and also 
> CanGetValueAs(self, row, col, typeName) and return true for that cell 
> for typeName == "long".  Otherwise the grid, editors, and renderers 
> should translate the value to/from strings as needed.


I'm having no luck implementing GetValueAsLong.  I added CanGetValueAs
and GetValueAsLong methods  to my grid table.  I placed a print
statement in it so I can see that it is being called and it returns a
Python True.  However, the table's GetValueAsLong is not being called.
Instead, the table's GetValue is called.  I've looked at the C++ code:

    wxGridTableBase *table = grid->GetTable();

    if ( table->CanGetValueAs(row, col, wxGRID_VALUE_NUMBER) )
    {
        m_startint = table->GetValueAsLong(row, col);
    }
    else
    {
        wxString startValue = table->GetValue(row, col);

And it sure looks like it should work.  Here are the relevant methods
from the table:

    def CanGetValueAs(self, row, col, typeName):
        col_name = self.col_fields[col]
        if (col_name == 'category_rsn') and (typeName ==
wx.grid.GRID_VALUE_NUMBER):
            print 'can get value as long'
            return True
        else:
            return False

    def GetValueAsLong(self, row, col):
        print 'get value as long'
        col_name = self.col_fields[col]
        r = self.data[row][col_name]
        return r


Suggestions?

Mark