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

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#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor

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#based on the plcopen standard. 

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#

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

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#

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#See COPYING file for copyrights details.

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#

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

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#modify it under the terms of the GNU General Public

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#License as published by the Free Software Foundation; either

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#version 2.1 of the License, or (at your option) any later version.

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#

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#This library 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 GNU

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#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

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

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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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import wx

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from graphics import *

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

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#                          Edit Step Content Dialog

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

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class SFCStepDialog(wx.Dialog):

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    def __init__(self, parent, controller, initial = False):

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        wx.Dialog.__init__(self, parent, title=_('Edit Step'), 

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              size=wx.Size(400, 250))

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        main_sizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=10)

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        main_sizer.AddGrowableCol(0)

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        main_sizer.AddGrowableRow(0)

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        column_sizer = wx.BoxSizer(wx.HORIZONTAL)

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        main_sizer.AddSizer(column_sizer, border=20, 

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              flag=wx.GROW|wx.TOP|wx.LEFT|wx.RIGHT)

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        left_gridsizer = wx.FlexGridSizer(cols=1, hgap=0, rows=6, vgap=5)

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        left_gridsizer.AddGrowableCol(0)

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        column_sizer.AddSizer(left_gridsizer, 1, border=5, 

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                              flag=wx.GROW|wx.RIGHT)

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        name_label = wx.StaticText(self, label=_('Name:'))

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        left_gridsizer.AddWindow(name_label, flag=wx.GROW)

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        self.StepName = wx.TextCtrl(self)

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        self.Bind(wx.EVT_TEXT, self.OnNameChanged, self.StepName)

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        left_gridsizer.AddWindow(self.StepName, flag=wx.GROW)

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        connectors_label = wx.StaticText(self, label=_('Connectors:'))

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        left_gridsizer.AddWindow(connectors_label, flag=wx.GROW)

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        self.Input = wx.CheckBox(self, label=_("Input"))

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        self.Bind(wx.EVT_CHECKBOX, self.OnConnectorsChanged, self.Input)

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        left_gridsizer.AddWindow(self.Input, flag=wx.GROW)

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        self.Output = wx.CheckBox(self, label=_("Output"))

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        self.Bind(wx.EVT_CHECKBOX, self.OnConnectorsChanged, self.Output)

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        left_gridsizer.AddWindow(self.Output, flag=wx.GROW)

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        self.Action = wx.CheckBox(self, label=_("Action"))

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        self.Bind(wx.EVT_CHECKBOX, self.OnConnectorsChanged, self.Action)

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        left_gridsizer.AddWindow(self.Action, flag=wx.GROW)

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        right_gridsizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=5)

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        right_gridsizer.AddGrowableCol(0)

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        right_gridsizer.AddGrowableRow(1)

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        column_sizer.AddSizer(right_gridsizer, 1, border=5, 

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              flag=wx.GROW|wx.LEFT)

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        preview_label = wx.StaticText(self, label=_('Preview:'))

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        right_gridsizer.AddWindow(preview_label, flag=wx.GROW)

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        self.Preview = wx.Panel(self,

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              style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)

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        self.Preview.SetBackgroundColour(wx.Colour(255,255,255))

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        setattr(self.Preview, "GetDrawingMode", lambda:FREEDRAWING_MODE)

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        setattr(self.Preview, "RefreshStepModel", lambda x:None)

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        setattr(self.Preview, "GetScaling", lambda:None)

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        setattr(self.Preview, "IsOfType", controller.IsOfType)

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        self.Preview.Bind(wx.EVT_PAINT, self.OnPaint)

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

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        button_sizer = self.CreateButtonSizer(

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                  wx.OK|wx.CANCEL|wx.CENTRE)

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        self.Bind(wx.EVT_BUTTON, self.OnOK, 

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                  button_sizer.GetAffirmativeButton())

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        main_sizer.AddSizer(button_sizer, border=20, 

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

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        self.SetSizer(main_sizer)

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        self.Step = None

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        self.Initial = initial

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        self.MinStepSize = None

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        self.PouNames = []

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        self.Variables = []

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        self.StepNames = []

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        self.StepName.SetFocus()

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    def SetPreviewFont(self, font):

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        self.Preview.SetFont(font)

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    def OnOK(self, event):

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        message = None

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        step_name = self.StepName.GetValue()

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        if step_name == "":

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            message = _("You must type a name!")

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        elif not TestIdentifier(step_name):

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            message = _("\"%s\" is not a valid identifier!") % step_name

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        elif step_name.upper() in IEC_KEYWORDS:

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            message = _("\"%s\" is a keyword. It can't be used!") % step_name

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        elif step_name.upper() in self.PouNames:

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            message = _("A POU named \"%s\" already exists!") % step_name

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        elif step_name.upper() in self.Variables:

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            message = _("A variable with \"%s\" as name already exists in this pou!") % step_name

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        elif step_name.upper() in self.StepNames:

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            message = _("\"%s\" step already exists!") % step_name

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        if message is not None:

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            dialog = wx.MessageDialog(self, message, _("Error"), wx.OK|wx.ICON_ERROR)

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            dialog.ShowModal()

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            dialog.Destroy()    

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        else:

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            self.EndModal(wx.ID_OK)

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    def SetMinStepSize(self, size):

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        self.MinStepSize = size

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    def SetPouNames(self, pou_names):

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        self.PouNames = [pou_name.upper() for pou_name in pou_names]

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    def SetVariables(self, variables):

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        self.Variables = [var["Name"].upper() for var in variables]

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    def SetStepNames(self, step_names):

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        self.StepNames = [step_name.upper() for step_name in step_names]

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    def SetValues(self, values):

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        value_name = values.get("name", None)

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        if value_name:

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            self.StepName.SetValue(value_name)

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        else:

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            self.StepName.SetValue("")

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        self.Input.SetValue(values.get("input", False))

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        self.Output.SetValue(values.get("output", False))

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        self.Action.SetValue(values.get("action", False))

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        self.RefreshPreview()

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    def GetValues(self):

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        values = {}

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        values["name"] = self.StepName.GetValue()

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        values["input"] = self.Input.IsChecked()

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        values["output"] = self.Output.IsChecked()

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        values["action"] = self.Action.IsChecked()

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        values["width"], values["height"] = self.Step.GetSize()

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        return values

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    def OnConnectorsChanged(self, event):

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        self.RefreshPreview()

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        event.Skip()

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    def OnNameChanged(self, event):

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        self.RefreshPreview()

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        event.Skip()

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    def RefreshPreview(self):

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        dc = wx.ClientDC(self.Preview)

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        dc.SetFont(self.Preview.GetFont())

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        dc.Clear()

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        self.Step = SFC_Step(self.Preview, self.StepName.GetValue(), self.Initial)

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        if self.Input.IsChecked():

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            self.Step.AddInput()

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        else:

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            self.Step.RemoveInput()

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        if self.Output.IsChecked():

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            self.Step.AddOutput()

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        else:

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            self.Step.RemoveOutput()

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        if self.Action.IsChecked():

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            self.Step.AddAction()    

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        else:

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            self.Step.RemoveAction()

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        width, height = self.MinStepSize

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        min_width, min_height = self.Step.GetMinSize()

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        width, height = max(min_width, width), max(min_height, height)

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        self.Step.SetSize(width, height)

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        clientsize = self.Preview.GetClientSize()

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        x = (clientsize.width - width) / 2

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        y = (clientsize.height - height) / 2

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        self.Step.SetPosition(x, y)

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        self.Step.Draw(dc)

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    def OnPaint(self, event):

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        self.RefreshPreview()

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        event.Skip()