#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# 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.


class button:

    def __init__(self, parent, id, args):
        self.parent = parent
        self.id = id
        self.back_elt = getSVGElementById(args.back_id)
        self.sele_elt = getSVGElementById(args.sele_id)
        self.toggle = args.toggle
        self.active = args.active
        if args.state != undefined:
            self.state = args.state
        else:
            self.state = False
        self.dragging = False
        if self.toggle:
            self.up = not self.state
        else:
            self.up = True

        # Add event on each element of the button
        if self.active:
            self.back_elt.addEventListener("mouseup", self, False)
            self.back_elt.addEventListener("mousedown", self, False)
            self.back_elt.addEventListener("mouseover", self, False)
            self.back_elt.addEventListener("mouseout", self, False)

            self.sele_elt.addEventListener("mouseup", self, False)
            self.sele_elt.addEventListener("mousedown", self, False)
            self.sele_elt.addEventListener("mouseover", self, False)
            self.sele_elt.addEventListener("mouseout", self, False)

        blockSVGElementDrag(self.back_elt)
        blockSVGElementDrag(self.sele_elt)

        self.updateElements()

    # method to display the current state of interface
    def updateElements(self):
        if self.up:
            self.sele_elt.setAttribute("display", "none")
            self.back_elt.removeAttribute("display")
        else:
            self.sele_elt.removeAttribute("display")
            self.back_elt.setAttribute("display", "none")

    def updateValues(self, values):
        if values.state != self.state:
            self.state = values.state
            self.up = not self.state
            if self.toggle:
                updateAttr(self.id, 'state', self.state)
            self.updateElements()

    def handleEvent(self, evt):
        # Quand le bouton de la souris est presse
        if evt.type == "mousedown":
            evt.stopPropagation()
            setCurrentObject(self)

            self.dragging = True

            if self.toggle:
                self.up = self.state
            else:
                self.up = False
                self.state = True
                updateAttr(self.id, 'state', self.state)
            self.updateElements()

        if isCurrentObject(self) and self.dragging:
            # Quand le bouton est survole
            if evt.type == "mouseover" and self.toggle:
                self.up = self.state
                self.updateElements()

            # Quand le curseur quitte la zone du bouton
            elif evt.type == "mouseout" and self.toggle:
                self.up = not self.state
                self.updateElements()

            # Quand le bouton de la souris est relache
            elif evt.type == "mouseup":
                evt.stopPropagation()
                if self.toggle and self.up == self.state:
                    self.state = not self.state
                    updateAttr(self.id, 'state', self.state)
                elif not self.toggle:
                    self.up = True
                    self.state = False
                    updateAttr(self.id, 'state', self.state)
                    self.updateElements()
                self.dragging = False


class textControl:

    def __init__(self, parent, id, args):
        self.parent = parent
        self.id = id
        self.back_elt = getSVGElementById(args.back_id)
        if args.text != undefined:
            self.text = args.text
        else:
            self.text = ""
        self.updateElements()

    def updateValues(self, values):
        if values.text != self.value:
            self.text = values.text
            updateAttr(self.id, 'text', self.text)
            self.updateElements()

    def updateElements(self):
        self.back_elt.firstChild.firstChild.textContent = self.text

    def handleEvent(self, evt):
        pass