1 #!/usr/bin/env python

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

     3 

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

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

     6 #

     7 # Copyright (C) 2017: Andrey Skvortsov

     8 #

     9 # See COPYING file for copyrights details.

    10 #

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

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

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

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

    15 #

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

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

    18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    19 # GNU General Public License for more details.

    20 #

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

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

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

    24 

    25 

    26 import wx

    27 from wx.lib.intctrl import IntCtrl

    28 

    29 

    30 class CustomIntUpdatedEvent(wx.PyCommandEvent):

    31     def __init__(self, id, value=0, object=None):

    32         wx.PyCommandEvent.__init__(self, CustomIntCtrl.wxEVT_COMMAND_CUSTOM_INT_UPDATED, id)

    33 

    34         self.__value = value

    35         self.SetEventObject(object)

    36 

    37     def GetValue(self):

    38         """Retrieve the value of the control at the time

    39         this event was generated."""

    40         return self.__value

    41 

    42 

    43 class CustomIntCtrl(wx.lib.intctrl.IntCtrl):

    44     """

    45     This class provides a control that takes and returns long as

    46     value, and provides bounds support and optional value limiting.

    47 

    48     It handles entering negative numbers more user-friendly than

    49     original wx.lib.intctrl.IntCtrl.

    50 

    51     It applies limits as focus is changed to other control and

    52     sends event afterwards to signal that editing is done.

    53     """

    54 

    55     # Used to trap events indicating that the current

    56     # integer value of the control has been changed.

    57     wxEVT_COMMAND_CUSTOM_INT_UPDATED = wx.NewEventType()

    58     EVT_CUSTOM_INT = wx.PyEventBinder(wxEVT_COMMAND_CUSTOM_INT_UPDATED, 1)

    59 

    60     def __init__(self, *args, **kwargs):

    61         wx.lib.intctrl.IntCtrl.__init__(self, *args, **kwargs)

    62         self.Bind(wx.EVT_KILL_FOCUS, self.UpdateValue)

    63         self.SetLongAllowed(True)

    64         self.SetLimited(False)

    65 

    66     def GetValue(self):

    67         """

    68         Returns integer (long) value of the control,

    69         but handles entering negative numbers

    70         """

    71         s = wx.TextCtrl.GetValue(self)

    72         if s == '-':

    73             s = ''

    74         return self._fromGUI(s)

    75 

    76     def GetValueStr(self):

    77         """Returns string value of TextCtrl"""

    78         return wx.TextCtrl.GetValue(self)

    79 

    80     def UpdateValue(self, event):

    81         self.SetLimited(True)

    82         self.SetLimited(False)

    83         try:

    84             self.GetEventHandler().ProcessEvent(

    85                 CustomIntUpdatedEvent(self.GetId(), self.GetValue(), self))

    86         except ValueError:

    87             return

    88         event.Skip()