| Button which controls a font chooser dialog.    This button type is intended to be used in preferencess dialog to
    bring up an interface for editing a font specification.  The
    PrefsDialogandTagAttributeChooserDialoguse this. Options      commandCallback to be executed when value changes.      variableTkinter StringVar instance to be kept up to date
      based on the value of the font specification.
 
        
            | Methods |  |  
        | __init__ command
 variable_trace
 
 |  
            |  | __init__ |  
        | 
__init__ (
        self,
        parent=None,
        **kw,
        )
 |  
            |  | command |  
        | 
command ( self,  *args )
 Callback for when button is pressed. |  
            |  | variable_trace |  
        | 
variable_trace ( self,  *args )
 Follow the changes to the variable. |  |