#!/usr/bin/python
''' handle gui button related commands.'''

import ri_tk as display
import ri_seq
import ri_widget

def quit():
    ''' correspond to quit button '''
    display.quit()

def previous():
    ''' correspond to previous button '''
    wid_name = ri_seq.previous()
    print wid_name
    if wid_name is not None:
        if 'current_window' in dir(display):
            display.kill_widget(display.current_window)

        ri_widget.Widget.dict[wid_name].display()
    else:
        ri_widget.MessageBox.dict["previous"].display()

def next():
    ''' correspond to next button '''
    wid_name = ri_seq.next()
    print wid_name
    if wid_name is not None:
        if 'current_window' in dir(display):
            display.kill_widget(display.current_window)

        ri_widget.Widget.dict[wid_name].display()
    else:
        ri_widget.MessageBox.dict["next"].display()