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# -*- coding: utf-8 -*-
#
# AWL simulator - FUP - Wire classes
#
# Copyright 2016 Michael Buesch <m@bues.ch>
#
# 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 2 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.
#
from __future__ import division, absolute_import, print_function, unicode_literals
from awlsim.common.compat import *
from awlsim.common.xmlfactory import *
from awlsim.gui.util import *
from awlsim.gui.fup.fup_base import *
class FupWire_factory(XmlFactory):
def parser_open(self, tag=None):
self.inWire = False
XmlFactory.parser_open(self, tag)
def parser_beginTag(self, tag):
if not self.inWire:
if tag.name == "wire":
self.inWire = True
idNum = tag.getAttrInt("id")
if idNum in (w.idNum for w in self.grid.wires):
raise self.Error("<wire id=%d> does "
"already exist." % idNum)
# Create wire and add it to the grid.
FupWire(grid=self.grid, idNum=idNum)
return
XmlFactory.parser_beginTag(self, tag)
def parser_endTag(self, tag):
if self.inWire:
if tag.name == "wire":
self.inWire = False
return
else:
if tag.name == "wires":
self.parser_finish()
return
XmlFactory.parser_endTag(self, tag)
def composer_getTags(self):
return [
self.Tag(name="wire",
attrs={
"id" : str(self.wire.idNum),
}),
]
class FupWire(FupBaseClass):
"""FUP/FBD wire connecting two FupConn connections."""
factory = FupWire_factory
BRANCH_DIA = 4
def __init__(self, grid, idNum=None):
FupBaseClass.__init__(self)
self.grid = grid
self.connections = set() # The connections this wire is connected to
self.outConn = None # The out-connection this is connected to
if idNum is None:
idNum = grid.getUnusedWireIdNum()
self.idNum = idNum # The ID number of this wire
grid.addWire(self)
self.__wirePen = QPen(QColor("#000000"))
self.__wirePen.setWidth(2)
self.__wireBranchPen = QPen(QColor("#000000"))
self.__wireBranchPen.setWidth(1)
self.__wireBranchBrush = QBrush(QColor("#000000"))
def connect(self, conn):
"""Add a connection to this wire.
"""
if conn in self.connections:
return
if conn.OUT and\
self.outConn is not None and\
self.outConn is not conn:
# We already have an output connection.
raise ValueError
self.connections.add(conn)
conn.wire = self
if conn.OUT:
self.outConn = conn
def disconnectAll(self):
"""Disconenct all connections.
"""
for conn in self.connections:
conn.wire = None
self.connections.clear()
self.outConn = None
self.grid.removeWire(self)
def disconnect(self, conn):
"""Disconnect a connection from this wire.
"""
conn.wire = None
self.connections.remove(conn)
if self.outConn is conn:
# Only inputs left. Remove them all.
self.disconnectAll()
if len(self.connections) == 1:
# Only one connection left. Remove that, too.
self.disconnectAll()
if not self.connections and not self.outConn:
self.grid.removeWire(self)
def draw(self, painter):
if self.outConn is None:
return
xAbs0, yAbs0 = self.outConn.pixCoords
r, d = self.BRANCH_DIA // 2, self.BRANCH_DIA
painter.setBrush(self.__wireBranchBrush)
for conn in self.connections:
xAbs1, yAbs1 = conn.pixCoords
painter.setPen(self.__wirePen)
painter.drawLine(xAbs0, yAbs0, xAbs0, yAbs1)
painter.drawLine(xAbs0, yAbs1, xAbs1, yAbs1)
painter.setPen(self.__wireBranchPen)
painter.drawEllipse(xAbs0 - r, yAbs0 - r, d, d)
painter.drawEllipse(xAbs1 - r, yAbs1 - r, d, d)
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