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

[From: Lauro Moura]

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.



-- 
Lauro Moura
INdT - Instituto Nokia de Tecnologia