SVGHMI: added a watchdog. To ensure that the whole chain is checked, watchdog use a periodic echo of a hearteat variable. JS client code systematically register /HEARTBEAT at 1s update freq, and reacts on updates of /HEARTBEAT by systematically incrementing it. C code catch /HEARTBEAT update and feeds python-implemented watchdog. For now, watchdog does nothing when tiggered
#!/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
# Copyright (C) 2017: Andrey Skvortsov <andrej.skvortzov@gmail.com>
#
# 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
class BrowseValuesLibraryDialog(wx.Dialog):
"""
Modal dialog that helps in selecting predefined XML attributes sets out of hierarchically organized list
"""
def __init__(self, parent, name, library, default=None):
wx.Dialog.__init__(self,
name='BrowseValueDialog', parent=parent,
style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER,
title=_('Browse %s values library') % name)
self.staticText1 = wx.StaticText(
label=_('Choose a value for %s:') % name,
name='staticText1', parent=self,
pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
self.ValuesLibrary = wx.TreeCtrl(
name='ValuesLibrary', parent=self, pos=wx.Point(0, 0),
size=wx.Size(400, 200),
style=wx.TR_HAS_BUTTONS | wx.TR_SINGLE | wx.SUNKEN_BORDER | wx.TR_HIDE_ROOT | wx.TR_LINES_AT_ROOT)
self.ButtonSizer = self.CreateButtonSizer(wx.OK | wx.CANCEL | wx.CENTRE)
self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.ButtonSizer.GetAffirmativeButton().GetId())
self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=3, vgap=10)
self.flexGridSizer1.AddWindow(self.staticText1, 0, border=20, flag=wx.GROW | wx.TOP | wx.LEFT | wx.RIGHT)
self.flexGridSizer1.AddWindow(self.ValuesLibrary, 0, border=20, flag=wx.GROW | wx.LEFT | wx.RIGHT)
self.flexGridSizer1.AddSizer(self.ButtonSizer, 0, border=20, flag=wx.ALIGN_RIGHT | wx.BOTTOM | wx.LEFT | wx.RIGHT)
self.flexGridSizer1.AddGrowableCol(0)
self.flexGridSizer1.AddGrowableRow(1)
self.SetSizer(self.flexGridSizer1)
self.Fit()
root = self.ValuesLibrary.AddRoot("")
self.GenerateValuesLibraryBranch(root, library, default)
def GenerateValuesLibraryBranch(self, root, children, default):
for infos in children:
item = self.ValuesLibrary.AppendItem(root, infos["name"])
self.ValuesLibrary.SetPyData(item, infos["infos"])
if infos["infos"] is not None and infos["infos"] == default:
self.ValuesLibrary.SelectItem(item)
self.ValuesLibrary.EnsureVisible(item)
self.GenerateValuesLibraryBranch(item, infos["children"], default)
def GetValueInfos(self):
selected = self.ValuesLibrary.GetSelection()
return self.ValuesLibrary.GetPyData(selected)
def OnOK(self, event):
selected = self.ValuesLibrary.GetSelection()
if not selected.IsOk() or self.ValuesLibrary.GetPyData(selected) is None:
message = wx.MessageDialog(self, _("No valid value selected!"), _("Error"), wx.OK | wx.ICON_ERROR)
message.ShowModal()
message.Destroy()
else:
self.EndModal(wx.ID_OK)