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# coding: UTF-8
# Copyright 2009, 2010 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_debug
import ka_history
import cairo
import math
_ANCESTORS_PAGE_NUMBER = 5
_SCALE = math.sqrt(2.0)
class AncestorsController(object):
"""
inv: self._drawing_page is not None
"""
def __init__(self, controller, widget_tree):
"""
pre: controller is not None
pre: widget_tree is not None
"""
self._widget_tree = widget_tree
self._drawing_page = self._widget_tree.get_widget('kandidNotebook'). \
get_nth_page(_ANCESTORS_PAGE_NUMBER)
self._drawing_area = self._widget_tree.get_widget('ancestors_drawingarea')
self._history = ka_history.KandidHistory.instance()
self._protozoon_id = None
def close(self):
"""Only a dummy."""
pass
def autoconnect_events(self):
"""Auto connect ancestors view."""
self._drawing_area.connect('expose-event', self.on_ancestorsarea_expose)
# events = {
# 'on_ancestrosarea_expose' : self.on_ancestrosarea_expose,
# }
#!NO self._widget_tree.signal_autoconnect(events)
def localize(self):
"""A dummy"""
pass
def show(self):
"""A dummy"""
def on_notebook_switch_page(self):
"""Only a dummy."""
def start_calculation(self, protozoon):
"""Start explaining of a protozoon.
pre: protozoon is not None
"""
ka_debug.info('AncestorsController.start_calculation %s' %
(protozoon.get_unique_id()))
self._protozoon_id = protozoon.get_unique_id()
self._drawing_page.show()
self._widget_tree.get_widget('kandidNotebook'). \
set_current_page(_ANCESTORS_PAGE_NUMBER)
def on_ancestorsarea_expose(self, widget, event):
""" Repaint image of a single protozoon inside ancestors view.
pre: widget is not None
"""
# draw precalculated protozoon stored in the surface cache.
# ka_debug.info('on_ancestrosarea_expose: ' + widget.name + ' '
# + str(widget.allocation.width)
# + 'x' + str(widget.allocation.height))
ctx = widget.window.cairo_create()
# Restrict Cairo to the exposed area; avoid extra work
ctx.rectangle(event.area.x, event.area.y,
event.area.width, event.area.height)
ctx.clip()
ctx.set_operator(cairo.OPERATOR_SOURCE)
# Fill the background with white
ctx.set_source_rgb(1.0, 1.0, 1.0)
ctx.rectangle(event.area.x, event.area.y,
event.area.width, event.area.height)
ctx.fill()
self._paint_next(ctx, event.area.width/2, 3, self._protozoon_id)
def _paint_connector(self, ctx, mx, my, x0, y0, my_parent):
if my_parent is not None:
ctx.set_line_width(2)
ctx.set_source_rgb(0.2, 0.2, 0.2)
ctx.move_to(mx, my)
ctx.line_to(x0, y0)
ctx.stroke()
def _collision(self, my_id):
if my_id is not None and self._history.contains(my_id):
p01, p10 = None, None
my_parents = self._history.get_parents(my_id)
if my_parents[0] is not None and self._history.contains(my_parents[0]):
p0 = self._history.get_parents(my_parents[0])
if p0[1] is not None and self._history.contains(p0[1]):
p01 = self._history.get_parents(p0[1])
if my_parents[1] is not None and self._history.contains(my_parents[1]):
p1 = self._history.get_parents(my_parents[1])
if p1[0] is not None and self._history.contains(p1[0]):
p10 = self._history.get_parents(p1[0])
distance = 1.0 if p01 is None or p10 is None else _SCALE
return 0.5 * distance * \
(self._collision(my_parents[0]) + self._collision(my_parents[1]))
else:
return 0.5
def _paint_next(self, ctx, xpos, ypos, my_id):
if my_id is not None and self._history.contains(my_id):
# ka_debug.info('my_id: ' + my_id)
surface = self._history.get_surface(my_id)
width = surface.get_width() if surface is not None else 200
height = surface.get_height() if surface is not None else 200
if self._history.contains(my_id):
mx, my = xpos, ypos+height
x0, y0 = xpos-(self._collision(my_id)*width+23), ypos+height+23
x1, y1 = xpos+(self._collision(my_id)*width+23), ypos+height+23
my_parents = self._history.get_parents(my_id)
self._paint_connector(ctx, mx, my, x0, y0, my_parents[0])
self._paint_connector(ctx, mx, my, x1, y1, my_parents[1])
ctx.save()
# ka_debug.matrix_s(ctx.get_matrix())
ctx.scale(1.0/_SCALE, 1.0/_SCALE)
# ka_debug.matrix(ctx.get_matrix())
self._paint_next(ctx, _SCALE*x0, _SCALE*y0, my_parents[0])
self._paint_next(ctx, _SCALE*x1, _SCALE*y1, my_parents[1])
# ka_debug.matrix_r(ctx.get_matrix())
ctx.restore()
if surface is not None:
# ka_debug.info('(xpos, ypos): %d, %d' % (xpos, ypos))
ctx.save()
# ka_debug.matrix_s(ctx.get_matrix())
ctx.set_operator(cairo.OPERATOR_SOURCE)
ctx.rectangle(xpos-width/2, ypos, width, height)
ctx.clip()
ctx.set_source_surface(surface, xpos-width/2, ypos)
ctx.paint()
# ctx.reset_clip() #TODO Required argument 'cr' not found
# ka_debug.matrix_r(ctx.get_matrix())
ctx.restore()
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