#! /usr/bin/python

import clutter
from gtk import gdk

stage = clutter.stage_get_default()
stage.set_color(clutter.color_parse('Black'))
stage.set_size(800, 600)
stage.set_title('Cluttershow')
stage.connect('key-press-event', clutter.main_quit)

timeline = clutter.Timeline(15, 30) # 15 frames at 30fps
behaviour = clutter.BehaviourOpacity(clutter.Alpha(timeline, clutter.sine_inc_func),
                                     0x00, 0xFF)

def completed(timeline):
    global current_tex, next_tex, behaviour
    
    behaviour.remove_all()
    
    temp = current_tex
    current_tex = next_tex
    next_tex = temp
    next_tex.hide()
timeline.connect("completed", completed)

def swap(stage, event):
    global timeline, behaviour

    # Don't swap if we're already swapping
    if timeline.is_playing():
        return
    
    behaviour.apply(next_tex)
    # Set the default state
    next_tex.raise_top()
    next_tex.set_opacity(0)
    next_tex.show()
    # Start the timeline again
    timeline.rewind()
    timeline.start()
stage.connect('button-press-event', swap)

pixbuf = gdk.pixbuf_new_from_file_at_size("/home/ross/Pictures/Desktop/1024x768/orange-sky.jpg", 800, 600)
current_tex = clutter.texture_new_from_pixbuf(pixbuf)
current_tex.set_position(0, 0)
current_tex.set_size (800, 600)
stage.add(current_tex)

pixbuf = gdk.pixbuf_new_from_file_at_size("/home/ross/Pictures/Desktop/1024x768/rain.jpg", 800, 600)
next_tex = clutter.texture_new_from_pixbuf(pixbuf)
next_tex.set_position(0, 0)
next_tex.set_size (800, 600)
stage.add(next_tex)

current_tex.show()
stage.show()

clutter.main()