#!/usr/bin/env python
# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
# 
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# modification, are permitted provided that the following conditions 
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#  * Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
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#    distribution.
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# ----------------------------------------------------------------------------

'''Demonstrates how to handle a platform-specific event not defined in
pyglet by subclassing Window.  This is not for the faint-hearted!

A message will be printed to stdout when the following events are caught:

 - On Mac OS X, the window drag region is clicked.
 - On Windows, the display resolution is changed.
 - On Linux, the window properties are changed.

'''

import pyglet

# Check for Carbon (OS X)
try:
    from pyglet.window.carbon import *
    _have_carbon = True
except ImportError:
    _have_carbon = False

# Check for Win32
try:
    from pyglet.window.win32 import *
    from pyglet.window.win32.constants import *
    _have_win32 = True
except ImportError:
    _have_win32 = False

# Check for Xlib (Linux)
try:
    from pyglet.window.xlib import *
    _have_xlib = True
except ImportError:
    _have_xlib = False

# Subclass Window
class MyWindow(pyglet.window.Window):
    if _have_carbon:
        @CarbonEventHandler(kEventClassWindow, kEventWindowClickDragRgn)
        def _on_window_click_drag_rgn(self, next_handler, event, data):
            print 'Clicked drag rgn.'
            carbon.CallNextEventHandler(next_handler, event)
            return noErr

    if _have_win32:
        @Win32EventHandler(WM_DISPLAYCHANGE)
        def _on_window_display_change(self, msg, lParam, wParam):
            print 'Display resolution changed.'
            return 0

    if _have_xlib:
        @XlibEventHandler(xlib.PropertyNotify)
        def _on_window_property_notify(self, event):
            print 'Property notify.'

if __name__ == '__main__':
    window = MyWindow()
    pyglet.app.run()
