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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# animation.py
#
# Copyright 2012 S. Daniel Francis <francis@sugarlabs.org>,
# Agustin Zubiaga <aguz@sugarlabs.org>
#
# 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.
import gtk
import gobject
import logging
_logger = logging.getLogger('animate-animation')
_logger.setLevel(logging.DEBUG)
logging.basicConfig()
MODE_NORMAL = 0
MODE_RETURN = 1
MODE_PING_PONG = 2
class Animation(gtk.Image):
__gproperties__ = {'mode': (gobject.TYPE_INT,
'animation mode',
'mode for iter the frames',
0,
2,
1,
gobject.PARAM_READWRITE),
'fps': (gobject.TYPE_INT,
'framerate',
'frames per second',
1,
24,
2,
gobject.PARAM_READWRITE)}
__gsignals__ = {"current-frame-updated": (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_INT,
(gobject.TYPE_INT,))}
def __init__(self, width, height, fps=2):
super(Animation, self).__init__()
self._current_frame = 0
self._timeout = None
self._mode = MODE_RETURN
self._running = False
self.frames = []
self.frames_reverse = False
self._size = width, height
self._sleep_time = int(1000 / fps)
def do_set_property(self, pspec, value):
if pspec.name == 'mode':
self.set_mode(value)
elif pspec.name == 'fps':
self.set_fps(value)
def do_get_property(self, pspec):
if pspec.name == 'mode':
return self._mode
elif pspec.name == 'fps':
return self.get_fps()
def move(self, old_pos, new_pos):
_object = self.frames[old_pos]
self.frames.remove(old_pos)
self.frames.insert(new_pos, _object)
def remove_current_frame(self):
del(self.frames[self._current_frame])
if len(self.frames):
self.set_current_frame(self._current_frame
if len(self.frames) >= self._current_frame
else len(self.frames) - 1)
else:
self.set_from_pixbuf(None)
self._current_frame = 0
def set_fps(self, fps):
self._sleep_time = int(1000 / fps)
if self._running:
self.pause()
self.run()
def get_fps(self):
return int(self._sleep_time * 1000.0)
def set_mode(self, mode):
"""Defines animation mode"""
if self.frames_reverse:
self.frames.reverse()
self.frames_reverse = False
self._mode = mode
def get_mode(self):
return self._mode
def set_size(self, width, height):
"""Defines animation size"""
self._size = width, height
# Redraw frame:
self.set_current_frame(self._current_frame)
def add_frame(self, pixbuf):
"""Appends an frame to the list"""
self.frames.append(pixbuf)
def run(self):
"""Runs the animation"""
if not self._running:
try:
pixbuf = self.frames[self._current_frame]
width = pixbuf.get_width()
height = pixbuf.get_height()
max_size = max(width, height)
if max_size is width:
scaled_pixbuf = pixbuf.scale_simple(self._size[0],
self._size[0] * height / width,
gtk.gdk.INTERP_TILES)
else:
scaled_pixbuf = pixbuf.scale_simple(self._size[1] *\
width / height,
self._size[1],
gtk.gdk.INTERP_TILES)
self.set_from_pixbuf(scaled_pixbuf)
self._running = True
self._timeout = gobject.timeout_add(self._sleep_time, self.next)
_logger.info(" Running!")
except IndexError:
_logger.error(" There aren't frames")
else:
_logger.error(" The animation is running already")
def get_current_frame(self):
return self._current_frame
def set_current_frame(self, pos):
self._current_frame = pos
pixbuf = self.frames[self._current_frame]
width = pixbuf.get_width()
height = pixbuf.get_height()
max_size = max(width, height)
if max_size is width:
scaled_pixbuf = pixbuf.scale_simple(self._size[0],
self._size[0] * height / width,
gtk.gdk.INTERP_TILES)
else:
scaled_pixbuf = pixbuf.scale_simple(self._size[1] * width / height,
self._size[1],
gtk.gdk.INTERP_TILES)
self.set_from_pixbuf(scaled_pixbuf)
self.set_from_pixbuf(scaled_pixbuf)
def pause(self):
"""Pause the animation"""
gobject.source_remove(self._timeout)
self._running = False
def next(self):
"""Shows the next frame"""
if self._current_frame != len(self.frames) - 1:
self._current_frame += 1
elif not self._current_frame != len(self.frames) - 1 and \
not self._mode == MODE_NORMAL:
if self._mode == MODE_PING_PONG:
self.frames.reverse()
self.frames_reverse = not self.frames_reverse
self._current_frame = 1
else:
self._current_frame = 0
pos = self.emit("current-frame-updated", self._current_frame)
self.set_current_frame(pos)
return True
def back(self):
"""Shows the previous frame"""
if self._current_frame != 0:
self._current_frame -= 1
elif self._current_frame == 0 and not self._mode == MODE_NORMAL:
if self._mode == MODE_PING_PONG:
self.frames.reverse()
self.frames_reverse = not self.frames_reverse
self._current_frame = -2
else:
self._current_frame = -1
self.emit("current-frame-updated", self._current_frame)
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