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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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# This file is part of Beremiz, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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#

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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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# Copyright (C) 2017: Andrey Skvortsov <andrej.skvortzov@gmail.com>

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#

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# See COPYING file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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# of the License, or (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

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import wx

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from graphics.GraphicCommons import SELECTION_DIVERGENCE, \

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    SELECTION_CONVERGENCE, SIMULTANEOUS_DIVERGENCE, SIMULTANEOUS_CONVERGENCE

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from graphics.SFC_Objects import SFC_Divergence

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from BlockPreviewDialog import BlockPreviewDialog

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#-------------------------------------------------------------------------------

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#                         Create New Divergence Dialog

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#-------------------------------------------------------------------------------

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class SFCDivergenceDialog(BlockPreviewDialog):

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    """

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    Class that implements a dialog for defining parameters for creating a new

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    divergence graphic element

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    """

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    def __init__(self, parent, controller, tagname, poss_div_types = None):

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        """

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        Constructor

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        @param parent: Parent wx.Window of dialog for modal

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        @param controller: Reference to project controller

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        @param tagname: Tagname of project POU edited

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        @param poss_div_types: Types of divergence that will be available in the dialog window

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        """

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        BlockPreviewDialog.__init__(self, parent, controller, tagname,

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              title=_('Create a new divergence or convergence'))

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        # Init common sizers

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        self._init_sizers(2, 0, 7, None, 2, 1)

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        # Create label for divergence type

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        type_label = wx.StaticText(self, label=_('Type:'))

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        self.LeftGridSizer.AddWindow(type_label, flag=wx.GROW)

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        # Create radio buttons for selecting divergence type

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        divergence_buttons = [

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            (SELECTION_DIVERGENCE, _('Selection Divergence')),

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            (SELECTION_CONVERGENCE, _('Selection Convergence')),

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            (SIMULTANEOUS_DIVERGENCE, _('Simultaneous Divergence')),

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            (SIMULTANEOUS_CONVERGENCE, _('Simultaneous Convergence'))]

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        poss_div_btns = []

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        if poss_div_types is not None:

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             for val in poss_div_types:

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                 poss_div_btns.append(divergence_buttons[val])

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        else:

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            poss_div_btns = divergence_buttons

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        self.TypeRadioButtons = {}

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        first = True

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        focusbtn = None

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        for type, label in poss_div_btns:

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            radio_button = wx.RadioButton(self, label=label,

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                  style=(wx.RB_GROUP if first else 0))

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            radio_button.SetValue(first)

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            self.Bind(wx.EVT_RADIOBUTTON, self.OnTypeChanged, radio_button)

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            self.LeftGridSizer.AddWindow(radio_button, flag=wx.GROW)

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            self.TypeRadioButtons[type] = radio_button

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            if first: focusbtn = type

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            first = False

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        # Create label for number of divergence sequences

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        sequences_label = wx.StaticText(self,

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              label=_('Number of sequences:'))

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        self.LeftGridSizer.AddWindow(sequences_label, flag=wx.GROW)

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        # Create spin control for defining number of divergence sequences

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        self.Sequences = wx.SpinCtrl(self, min=2, max=20, initial=2)

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        self.Bind(wx.EVT_SPINCTRL, self.OnSequencesChanged, self.Sequences)

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        self.LeftGridSizer.AddWindow(self.Sequences, flag=wx.GROW)

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        # Add preview panel and associated label to sizers

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        self.RightGridSizer.AddWindow(self.PreviewLabel, flag=wx.GROW)

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        self.RightGridSizer.AddWindow(self.Preview, flag=wx.GROW)

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        # Add buttons sizer to sizers

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        self.MainSizer.AddSizer(self.ButtonSizer, border=20,

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              flag=wx.ALIGN_RIGHT|wx.BOTTOM|wx.LEFT|wx.RIGHT)

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        self.Fit()

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        # Selection divergence radio button is default control having keyboard

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        # focus

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        self.TypeRadioButtons[focusbtn].SetFocus()

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    def GetMinElementSize(self):

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        """

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        Get minimal graphic element size

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        @return: Tuple containing minimal size (width, height) or None if no

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        element defined

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        """

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        return self.Element.GetMinSize(True)

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    def GetDivergenceType(self):

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        """

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        Return type selected for SFC divergence

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        @return: Type selected (None if not found)

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        """

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        # Go through radio buttons and return type associated to the one that

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        # is selected

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        for type, control in self.TypeRadioButtons.iteritems():

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            if control.GetValue():

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                return type

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        return None

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    def GetValues(self):

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        """

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        Set default SFC divergence parameters

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        @param values: Divergence parameters values

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        """

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        return {"type": self.GetDivergenceType(),

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                "number": self.Sequences.GetValue()}

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    def OnTypeChanged(self, event):

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        """

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        Called when SFC divergence type changed

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        @param event: wx.RadioButtonEvent

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        """

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        self.RefreshPreview()

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        event.Skip()

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    def OnSequencesChanged(self, event):

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        """

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        Called when SFC divergence number of sequences changed

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        @param event: wx.SpinEvent

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        """

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        self.RefreshPreview()

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        event.Skip()

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    def RefreshPreview(self):

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        """

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        Refresh preview panel of graphic element

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        Override BlockPreviewDialog function

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        """

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        # Set graphic element displayed, creating a SFC divergence

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        self.Element = SFC_Divergence(self.Preview,

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                                      self.GetDivergenceType(),

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                                      self.Sequences.GetValue())

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        # Call BlockPreviewDialog function

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        BlockPreviewDialog.RefreshPreview(self)