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# coding: UTF8
# 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 math
import random
import cairo
import ka_random
import model_allele
import exon_position
import exon_direction
class MaskMerger(model_allele.Allele):
"""MaskMerger
"""
def __init__(self, trunk):
"""Constructor for a simple merger."""
super(MaskMerger, self).__init__(trunk)
self.alfa1 = 1.0
self.alfa2 = 0.0
self.center = exon_position.Position(self.path, 0.0, 0.0)
self.direction = exon_direction.Direction(self.path, 0.0, 0.0)
self.constraint_alfa = (0.0, 1.0)
def __eq__(self, other):
"""Equality based on same instance."""
equal = isinstance(other, MaskMerger) \
and self.alfa1 == other.alfa1 \
and self.alfa2 == other.alfa2 \
and self.center == other.center \
and self.direction == other.direction
return equal
def randomize(self):
"""
"""
self.alfa1 = random.uniform(self.constraint_alfa[0], self.constraint_alfa[1])
self.alfa2 = random.uniform(self.constraint_alfa[0], self.constraint_alfa[1])
self.center.randomize()
self.direction.randomize()
def mutate(self):
"""
"""
if ka_random.is_mutating():
self.alfa1 += ka_random.jitter_constrained(self.constraint_alfa)
self.alfa1 = ka_random.limitate_range(self.alfa1, self.constraint_alfa[0], self.constraint_alfa[1])
if ka_random.is_mutating():
self.alfa2 += ka_random.jitter_constrained(self.constraint_alfa)
self.alfa2 = ka_random.limitate_range(self.alfa2, self.constraint_alfa[0], self.constraint_alfa[1])
self.center.mutate()
self.direction.mutate()
def shuffle(self):
"""
"""
pass
def crossingover(self, other):
"""
pre: isinstance(other, MaskMerger)
pre: isinstance(self, MaskMerger)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
post: __return__ is not other
"""
new_one = MaskMerger(self.get_trunk())
crossing = ka_random.crossing_sequence(2)
new_one.alfa1 = self.alfa1 if crossing[0] else other.alfa1
new_one.alfa2 = self.alfa2 if crossing[0] else other.alfa2
new_one.center = self.center if crossing[0] else other.center
new_one.direction = self.direction if crossing[1] else other.direction
return new_one
def draw_single_layer(self, single_layer, mask_layer, ctx, width, height):
"""
pre: single_layer is not None
pre: ctx is not None
pre: width > 0
pre: height > 0
pre: width == height
"""
# paint one layer masked by an linear gradient
ctx.save()
dx = self.direction.offset * math.cos(self.direction.radian)
dy = self.direction.offset * math.sin(self.direction.radian)
linear = cairo.LinearGradient(self.center.x_pos + dx,
self.center.y_pos + dy,
self.center.x_pos - dx,
self.center.y_pos - dy)
linear.add_color_stop_rgba(1.0, 1.0, 1.0, 1.0, self.alfa1)
linear.add_color_stop_rgba(0.0, 0.0, 0.0, 0.0, self.alfa2)
ctx.mask(linear)
single_layer.draw(ctx, width, height)
ctx.restore()
def explain(self):
"""
post len(__return__) == 3
"""
return u'Mask merger, center=' + self.center.explain() \
+ u' direction=' + self.direction.explain(), \
None, \
None
def copy(self):
"""A copy constructor.
post: isinstance(__return__, MaskMerger)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
"""
new_one = MaskMerger(self.get_trunk())
new_one.center = self.center.copy()
new_one.direction = self.direction.copy()
return new_one
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