def create_button(self,label,callback):#,flag=None,widget=None):
_btn = MTButton(multiline=True, label=label, anchor_x='left',
halign='left', padding_x=8)
_btn.connect('on_press', callback)
_max = 1
for _s in label.splitlines():
_l = len(_s)
if _l > _max:
_max = _l
_btn.width = min(int(_max * pixels),100)
return _btn
