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# -*- mode: python; coding: utf-8 -*-
#
# Pigment Python binding implicit animation example
#
# Copyright © 2006, 2007, 2008 Fluendo Embedded S.L.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
# Author: Florian Boucault <florian@fluendo.com>
import sys, pgm, gobject
from pgm.timing import implicit, controller, ticker
# Update animations
def on_update_pass(viewport, tck):
tck.tick()
# Handles the key presses
def on_key_press(viewport, event, drawable, help):
if event.keyval == pgm.keysyms.q or event.keyval == pgm.keysyms.Escape:
pgm.main_quit()
elif event.keyval == pgm.keysyms.Right:
drawable.x += 0.5
elif event.keyval == pgm.keysyms.Left:
drawable.x -= 0.5
elif event.keyval == pgm.keysyms.Down:
drawable.y += 0.5
elif event.keyval == pgm.keysyms.Up:
drawable.y -= 0.5
elif event.keyval == pgm.keysyms.o:
if drawable.opacity != 0:
drawable.opacity = 0
else:
drawable.opacity = 255
elif event.keyval == pgm.keysyms.h:
if help.opacity != 0:
help.opacity = 0
else:
help.opacity = 220
# Terminate the mainloop on a delete event
def on_delete(viewport, event):
pgm.main_quit()
def main(args):
# OpenGL viewport creation
gl = pgm.viewport_factory_make('opengl')
gl.title = 'Implicit animation'
# Canvas, image drawables creation
cvs = pgm.Canvas()
img = pgm.Image()
# Bind the canvas to the OpenGL viewport
gl.set_canvas(cvs)
# Image properties
img.position = (1.0, 1.5, 0.0)
img.size = (1.0, 1.0)
img.bg_a = 0
img.set_from_file("examples/pictures/fluendo.png")
# A drawable needs to be shown
img.show()
# Add it to the middle layer of the canvas
cvs.add(pgm.DRAWABLE_MIDDLE, img)
# Set the ticker used by controllers
tck = ticker.Ticker()
controller.Controller.set_ticker(tck)
# Implicity animated image wrapping img
animated_img = implicit.AnimatedObject(img)
animated_img.mode = implicit.REPLACE
# Help drawable creation
help = pgm.Text("<b><tt>Implicit animations are great !</tt></b>\n\n" \
"Keys:\n\n" \
"'arrows':\t move the drawable\n" \
"'o':\t set the drawable's opacity to 0 or 255\n" \
"'h':\t get rid of the help\n")
# Help text properties tweaking
help.position = (0.8, 1.0, 0.0)
help.size = (2.0, 1.0)
help.font_height = 0.1
help.fg_color = (220, 220, 220, 255)
help.bg_color = (20, 20, 20, 255)
help.opacity = 0
# A drawable needs to be shown
help.show()
# Add it to the middle layer of the canvas
cvs.add(pgm.DRAWABLE_MIDDLE, help)
# Implicity animated text wrapping help
animated_help = implicit.AnimatedObject(help)
animated_help.mode = implicit.REPLACE
animated_help.opacity = 220
# Let's start the mainloop
gl.connect('delete-event', on_delete)
gl.connect('key-press-event', on_key_press, animated_img, animated_help)
gl.connect('update-pass', on_update_pass, tck)
gl.show()
pgm.main()
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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