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# coding: UTF-8
# Copyright 2009 Thomas Jourdan
#
# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
import ka_controller
import ka_task
import cairo
import ka_debug
class KandidIncoming(object):
"""
inv: 0 <= len(self.incoming_protozoans) <= self._capacity
inv: 0 <= len(self.incoming_surface_cache) <= self._capacity
inv: 0 <= len(self.incoming_surface_cache) <= len(self.incoming_protozoans)
inv: self._capacity > 0
"""
ids = 0
def __init__(self, capacity, widget_tree):
"""
pre: capacity > 0
pre: widget_tree is not None
"""
self._capacity = capacity
self._widget_tree = widget_tree
self.incoming_id = []
self.incoming_protozoans = {}
self.incoming_surface_cache = {}
self._inbox_widget = self._widget_tree.get_widget('incomingBox')
self._update_incomming_gui()
def autoconnect_events(self):
"""Create a dictionary to connect events."""
events = { }
for cell_index in range(self._capacity):
key = 'on_incomingarea_#_expose'.replace('#', str(cell_index))
events[key] = self.on_incomingarea_expose
self._widget_tree.signal_autoconnect(events)
def at_index(self, index):
iid = self.incoming_id[index] if index < len(self.incoming_id) \
else -1
protozoon = self.incoming_protozoans[iid] \
if self.incoming_protozoans.has_key(iid) \
else None
return protozoon, iid
def append_protozoon(self, incoming_protozoon):
""" Append incoming protozoon and manage capacity.
pre: incoming_protozoon is not None
"""
ka_debug.info('incoming: append protozoon')
while len(self.incoming_protozoans) >= self._capacity:
iid = self.incoming_id[0]
del self.incoming_id[0]
del self.incoming_protozoans[iid]
if self.incoming_surface_cache.has_key(iid):
del self.incoming_surface_cache[iid]
KandidIncoming.ids += 1
self.incoming_id.append(KandidIncoming.ids)
self.incoming_protozoans[KandidIncoming.ids] = incoming_protozoon
index = len(self.incoming_id) - 1
widget_name = 'incomingarea_' + str(index)
widget = self._widget_tree.get_widget(widget_name)
task = ka_task.GeneratorTask(self.task_render,
self.on_image_completed,
widget_name)
task.start(incoming_protozoon, KandidIncoming.ids,
widget.allocation.width, widget.allocation.height)
# ka_debug.info('incoming: start_calculation %ux%u, iid %u for %s' %
# (widget.allocation.width, widget.allocation.height,
# KandidIncoming.ids, widget.name))
def accept_protozoon(self, index):
""" Move protozoon from incoming list to image population.
pre: 0 <= index < self._capacity
"""
protozoon, iid = self.at_index(index)
if protozoon is not None:
# ka_debug.info('incoming: accept incoming protozoon %u' % iid)
del self.incoming_id[index]
del self.incoming_protozoans[iid]
if self.incoming_surface_cache.has_key(iid):
del self.incoming_surface_cache[iid]
self._update_incomming_gui()
return protozoon
def decline_protozoon(self, index):
""" Remove protozoon from incoming list
pre: 0 <= index < self._capacity
"""
if index < len(self.incoming_protozoans):
# ka_debug.info('incoming: decline incoming protozoon %u' % index)
iid = self.incoming_id[index]
del self.incoming_id[index]
del self.incoming_protozoans[iid]
if self.incoming_surface_cache.has_key(iid):
del self.incoming_surface_cache[iid]
self._update_incomming_gui()
def task_render(self, task, *args, **kwargs):
"""Draw protozoon to surface cache.
pre: len(args) == 4
"""
protozoon, iid, width, height = \
args[0], args[1], args[2], args[3]
# ka_debug.info('incoming: task_render entry: ' + str(iid))
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
ctx = cairo.Context(surface)
protozoon.render(task, ctx, width, height)
if self.incoming_protozoans.has_key(iid):
self.incoming_surface_cache[iid] = surface
# ka_debug.info('incoming: task_render exit: ' + str(iid))
return iid
def on_image_completed(self, *args):
"""Rendering task has finished"""
# ka_debug.info('incoming: on_image_completed: ' + str(args[0]))
self._update_incomming_gui()
def on_incomingarea_expose(self, widget, dummy):
""" Repaint image of a single protozoon inside incoming area.
pre: widget is not None
"""
# ka_debug.info('incoming: on_incomingarea_expose: ' + widget.name)
self.draw(ka_controller.name_to_index(widget.name), \
ka_controller.create_context(widget), \
widget.allocation.width, widget.allocation.height)
def draw(self, index, ctx, width, height):
""" Repaint one protozoon image inside incoming area.
pre: 0 <= index < self._capacity
pre: ctx is not None
pre: width > 0
pre: height > 0
"""
iid = -1
if index < len(self.incoming_id):
iid = self.incoming_id[index]
if self.incoming_surface_cache.has_key(iid):
# draw protozoon to screen
ctx.set_operator(cairo.OPERATOR_SOURCE)
ctx.set_source_surface(self.incoming_surface_cache[iid])
ctx.paint()
else:
ctx.set_source_rgba(0.65, 0.65, 0.65, 0.0)
ctx.rectangle(0.0, 0.0, width, height)
ctx.fill()
def _update_incomming_gui(self):
for index in range(self._capacity):
self._widget_tree.get_widget('incomingbutton_' + str(index)). \
set_sensitive(len(self.incoming_id) > index)
self._inbox_widget.queue_draw()
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