[maemo-developers] Help with hildon.NumberEditor: IN PYTHON

[From: Darren Enns]

Lauro Moura wrote:
> On Wed, Apr 2, 2008 at 4:28 PM, Darren Enns <darethehair at gmail.com> wrote:
>   
>>  Help please!
>>
>>  I am slowly learning OOP-style PyGTK code, and have recently discovered how
>> 'nasty' gtk.Spinbutton looks on Maemo :(
>>
>>  OK, so I was just going to make some quick changed to my Python code to use
>> 'hildon.NumberEditor' instead, but it is not as much a 'drop-in-replacement'
>> as a newbie like me requires...
>>
>>  """ subclass the gtk.Digalog() class to create a new dialog window """
>>  class spin_window(gtk.Dialog) :
>>          value = [0] * SPIN_BUTTON_COUNT
>>
>>          def hildon_set_value(self,widget,index):
>>             self.value[index] = widget.get_value()
>>             return
>>
>>          # a callback to remember the values of the spin buttons.
>>          # the 'index' is setup when connecting the callback
>>          def set_value(self,widget,index):
>>             self.value[index] = widget.get_value_as_int()
>>             return
>>
>>          def __init__(self,window):
>>                  # init the parent class to create the dialog
>>                  super(spin_window, self).__init__("set spin values",
>> window,
>>                                  gtk.DIALOG_DESTROY_WITH_PARENT |
>> gtk.DIALOG_MODAL,
>>                                  (gtk.STOCK_OK, gtk.RESPONSE_OK))
>>
>>                  number_editor = hildon.NumberEditor(-90,90)
>>                  #number_editor.connect("changed",self.set_value, 0)
>>                  #number_editor.connect("notify::value",self.set_value, 0)
>>
>> number_editor.connect("notify::value",self.hildon_set_value,0)
>>                  number_editor.set_value(0)
>>                  self.vbox.pack_start(number_editor)
>>                  self.value[0] = 0
>>                  number_editor.show()
>>
>>                  label = gtk.Label('Latitude Degrees:')
>>                  self.vbox.pack_start(label)
>>                  #label.modify_font(pango.FontDescription("sans 30"))
>>                  label.show()
>>
>>                  adjustment = gtk.Adjustment(0, -90, 90, 1, 1, 1)
>>                  spinbutton = gtk.SpinButton(adjustment,0,0)
>>                  spinbutton.connect("changed",self.set_value, 1)
>>                  self.vbox.pack_start(spinbutton)
>>                  self.value[1] = 0
>>                  spinbutton.show()
>>  ...
>>
>>  Notice my feeble attempts to add 'special' code for the numbereditor -- but
>> the code above does not work:
>>
>>  "TypeError: hildon_set_value() takes exactly 3 arguments (4 given)"
>>
>>  So I am getting all confused!  It *looks* like I am using the correct
>> signal value, and passing three parameters...
>>
>>  There are very few Python examples out on Google for me to learn the
>> solution with.
>>
>>     
>
> Try replacing the argument list on the callback to
>
> def set_value(self, widget, index, data=None)
>
> Now data will take the extra data passed when the signal is received.
>
> Thanks for the suggestion!  It got me a bit further, but my parameter offsets must be wrong.  This is what my 'hildon' callback looks like now:
>   

def hildon_set_value(self, widget, index, data=None):

When I use it that way, I get complaints that 'index' is not an integer 
(which of course it is):

Traceback (most recent call last):
  File "mephemeris.22.py", line 2480, in hildon_set_value
    self.value[index] = widget.get_value()
TypeError: list indices must be integers

This suggests to me that I have the correct number of parameters, but 
not in the position I am expecting them in.

Dare