#!/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.


from __future__ import absolute_import
import wx

from dialogs.DurationEditorDialog import DurationEditorDialog


class DurationCellControl(wx.PyControl):

    '''
    Custom cell editor control with a text box and a button that launches
    the DurationEditorDialog.
    '''
    def __init__(self, parent):
        wx.PyControl.__init__(self, parent)

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

        # create location text control
        self.Duration = wx.TextCtrl(self, size=wx.Size(0, -1),
                                    style=wx.TE_PROCESS_ENTER)
        self.Duration.Bind(wx.EVT_KEY_DOWN, self.OnDurationChar)
        main_sizer.Add(self.Duration, flag=wx.GROW)

        # create browse button
        self.EditButton = wx.Button(self, label='...', size=wx.Size(30, -1))
        self.Bind(wx.EVT_BUTTON, self.OnEditButtonClick, self.EditButton)
        main_sizer.Add(self.EditButton, flag=wx.GROW)

        self.Bind(wx.EVT_SIZE, self.OnSize)

        self.SetSizer(main_sizer)

        self.Default = None

    def SetValue(self, value):
        self.Default = value
        self.Duration.SetValue(value)

    def GetValue(self):
        return self.Duration.GetValue()

    def OnSize(self, event):
        self.Layout()

    def OnEditButtonClick(self, event):
        # pop up the Duration Editor dialog
        dialog = DurationEditorDialog(self)
        dialog.SetDuration(self.Duration.GetValue())
        if dialog.ShowModal() == wx.ID_OK:
            # set the duration
            self.Duration.SetValue(dialog.GetDuration())

        dialog.Destroy()

        self.Duration.SetFocus()

    def OnDurationChar(self, event):
        keycode = event.GetKeyCode()
        if keycode in [wx.WXK_RETURN, wx.WXK_TAB]:
            self.Parent.Parent.ProcessEvent(event)
        elif keycode == wx.WXK_ESCAPE:
            self.Duration.SetValue(self.Default)
            self.Parent.Parent.CloseEditControl()
        else:
            event.Skip()

    def SetInsertionPoint(self, i):
        self.Duration.SetInsertionPoint(i)

    def SetFocus(self):
        self.Duration.SetFocus()


class DurationCellEditor(wx.grid.GridCellEditor):
    '''
    Grid cell editor that uses DurationCellControl to display an edit button.
    '''
    def __init__(self, table, colname):
        wx.grid.GridCellEditor.__init__(self)

        self.Table = table
        self.Colname = colname

    def __del__(self):
        self.CellControl = None

    def Create(self, parent, id, evt_handler):
        self.CellControl = DurationCellControl(parent)
        self.SetControl(self.CellControl)
        if evt_handler:
            self.CellControl.PushEventHandler(evt_handler)

    def BeginEdit(self, row, col, grid):
        self.CellControl.Enable()
        self.CellControl.SetValue(self.Table.GetValueByName(row, self.Colname))
        self.CellControl.SetFocus()

    def EndEdit(self, row, col, grid, oldval):
        value = self.CellControl.GetValue()
        changed = value != oldval
        if changed:
            return value
        else:
            return None

    def ApplyEdit(self, row, col, grid):
        value = self.CellControl.GetValue()
        self.Table.SetValueByName(row, self.Colname, value)
        self.CellControl.Disable()

    def SetSize(self, rect):
        self.CellControl.SetDimensions(rect.x + 1, rect.y,
                                       rect.width, rect.height,
                                       wx.SIZE_ALLOW_MINUS_ONE)

    def Clone(self):
        return DurationCellEditor(self.Table, self.Colname)