platform_menu.py

# -*- coding: utf-8 -*-
"""
Created on Tue Jan 19 14:53:39 2016

"""
# -*- coding: utf-8 -*-
"""
Created on Tue Jan 19 12:21:14 2016

@author: pengyou modified on example menu
"""

#! /usr/bin/python

## \file  example_simple.py
#  \brief A (very simple) example of using the menu system
#  \author Scott Barlow
#  \date 2009
#  \version 1.0.0
#
#  An example script to create a window and explore some of the features of the
#  menu class I've created.  This script just creates a very simple menu for
#  users that just want to see a plain and simply menu.  This could be made even
#  more simple, but I keep some features I deem "essential" (such as
#  non-blocking code and only updating the portion of the screen that changed).
#
#
#       Copyright 2009 Scott Barlow
#
#       This program is free software; you can redistribute it and/or modify
#       it under the terms of the GNU General Public License as published by
#       the Free Software Foundation; either version 3 of the License, or
#       (at your option) any later version.
#
#       This program is distributed in the hope that it will be useful,
#       but WITHOUT ANY WARRANTY; without even the implied warranty of
#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#       GNU General Public License for more details.
#
#       You should have received a copy of the GNU General Public License
#       along with this program; if not, write to the Free Software
#       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#       MA 02110-1301, USA or see <http://www.gnu.org/licenses/>.
#
#
#  Changelog
#     V1.0.0 - Initial Release
#     V1.0.1 - No change to this file
#     V1.0.2 - No change to this file
#     V1.0.3 - No change to this file
#


#-------------------------------------------------------------------------------
#---[ Imports ]-----------------------------------------------------------------
#-------------------------------------------------------------------------------
import sys, pygame
from menu import *


## ---[ main ]------------------------------------------------------------------
#  This function runs the entire screen and contains the main while loop
#
def main(screen):

   # Create 3 diffrent menus.  One of them is only text, another one is only
   # images, and a third is -gasp- a mix of images and text buttons!  To
   # understand the input factors, see the menu file
   menu = cMenu(50, 50, 20, 5, 'vertical', 100, screen,
               [('PC', 1, None),
                ('Mac',  2, None),
                ('Back', 3, None)])

   # Center the menu on the draw_surface (the entire screen here)
   menu.set_center(True, True)

   # Center the menu on the draw_surface (the entire screen here)
   menu.set_alignment('center', 'center')

   # Create the state variables (make them different so that the user event is
   # triggered at the start of the "while 1" loop so that the initial display
   # does not wait for user input)
   state = 0
   prev_state = 1

   # rect_list is the list of pygame.Rect's that will tell pygame where to
   # update the screen (there is no point in updating the entire screen if only
   # a small portion of it changed!)
   rect_list = []

   # Ignore mouse motion (greatly reduces resources when not needed)
   pygame.event.set_blocked(pygame.MOUSEMOTION)

   # The main while loop
   while 1:
      # Check if the state has changed, if it has, then post a user event to
      # the queue to force the menu to be shown at least once
      if prev_state != state:
         pygame.event.post(pygame.event.Event(EVENT_CHANGE_STATE, key = 0))
         prev_state = state

      # Get the next event
      e = pygame.event.wait()

      # Update the menu, based on which "state" we are in - When using the menu
      # in a more complex program, definitely make the states global variables
      # so that you can refer to them by a name
      if e.type == pygame.KEYDOWN or e.type == EVENT_CHANGE_STATE:
         if state == 0:
            rect_list, state = menu.update(e, state)
         elif state == 1:
            print 'Platform: PC'
            state = 0
            return 1
         elif state == 2:
            print 'Platform: Mac'
            state = 0
            return 2
         else:
            print 'Back to Main Menu'
            state = 0
            return 4
            

      # Quit if the user presses the exit button
      if e.type == pygame.QUIT:
         pygame.quit()
         sys.exit()

      # Update the screen
      pygame.display.update(rect_list)