# -*- coding: utf-8 -*-
# Copyright (C) 2007-2015  CEA/DEN, EDF R&D, OPEN CASCADE
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
#
# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
#

QT_SALOME_VERSION=@QT_SALOME_VERSION@

try:
    from PyQt@QT_SALOME_VERSION@.Qt import *
except:
    pass

__CONNECT__ = 0
__DISCONNECT__ = 1

def Connect(*args):
    """
    Connects signal of sender to slot of reciever or function.

    Examples:

    1. Connect(sender, signal, reciever, slot)
       - sender: sender of the signal
       - signal: string value in the form 'signal_name(type1,type2,...)'
       - reciever: reciever of the signal
       - slot: string value in the form 'slot_name(type1,type2,...)'

    2. Connect(sender, signal, function)
       - sender: sender of the signal
       - signal: string value in the form 'signal_name(type1,type2,...)'
       - function: function instance
    """
    if len(args) == 4:
        _process(args[0], args[1], args[2], args[3], __CONNECT__)
    elif len(args) == 3:
        _process(args[0], args[1], None, args[2], __CONNECT__)
    else:
        RuntimeError("Bad number of arguments, expected 3 or 4 !!!")

def Disconnect(*args):
    """
    Disconnects signal of sender to slot of reciever or function.

    Examples:

    1. Disconnect(sender, signal, reciever, slot)
       - sender: sender of the signal
       - signal: string value in the form 'signal_name(type1,type2,...)'
       - reciever: reciever of the signal
       - slot: string value in the form 'slot_name(type1,type2,...)'

    2. Disconnect(sender, signal, function)
       - sender: sender of the signal
       - signal: string value in the form 'signal_name(type1,type2,...)'
       - function: function instance
    """
    if len(args) == 4:
        _process(args[0], args[1], args[2], args[3], __DISCONNECT__)
    elif len(args) == 3:
        _process(args[0], args[1], None, args[2], __DISCONNECT__)
    else:
        RuntimeError("Bad number of arguments, expected 3 or 4 !!!")

def _process(sender,signal,reciever,slot,operation):
    isFunc = False
    slotname = ""
    if isinstance(slot, str):
        n = slot.find("(")
        if n > 0:
            slotname = slot[:n]

    if callable(slot):
        isFunc = True

    if QT_SALOME_VERSION == 4:
        _call = None
        if operation == __CONNECT__:
            _call = QObject.connect
        elif operation == __DISCONNECT__:
            _call = QObject.disconnect
        if isFunc:
            _call(sender,SIGNAL(signal),slot)
        else:
            _call(sender,SIGNAL(signal),reciever,SLOT(slot))               
    else:
        signame = ""
        n = signal.find("(")
        if n > 0:
            signame = signal[:n]
        
        tmp = signal[(n+1):]
        m = tmp.rfind(")")
        types = tmp[:m]
        
        if len(signame) > 0 and (len(slotname) > 0 or isFunc):
            arg1 = ""
            arg2 = ""
            op = ""
            rcv = ""
            if len(types.strip()) > 0:
                arg1 = "[" + types + "]"
            if operation == __DISCONNECT__:
                op = "dis"
            if reciever is not None and not isFunc:
                rcv= "reciever."            
            if isFunc:
                arg2 = "slot"
            else:
                arg2 = slotname

            command = "sender." + signame + arg1 + "." + op + "connect(" + rcv + arg2 + ")"
            exec(command)
        else:
            raise RuntimeError("Bad signal '%s' or slot '%s' format !!!"%(signal, slot))