controls/DiscoveryPanel.py
author Edouard Tisserant <edouard@beremiz.fr>
Wed, 03 Apr 2024 14:17:50 +0200
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parent 3876 7d83cd94e3cc
child 3935 bc51b5a2daa9
permissions -rw-r--r--
SVG: fix HMI:Assign widget to properly handle single-letter variable names.
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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 socket
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import wx
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import wx.lib.mixins.listctrl as listmix
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from zeroconf import ServiceBrowser, Zeroconf, get_all_addresses
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service_type = '_Beremiz._tcp.local.'
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class AutoWidthListCtrl(wx.ListCtrl, listmix.ListCtrlAutoWidthMixin):
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    def __init__(self, parent, name, pos=wx.DefaultPosition,
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                 size=wx.DefaultSize, style=0):
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        wx.ListCtrl.__init__(self, parent, wx.ID_ANY, pos, size, style, name=name)
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        listmix.ListCtrlAutoWidthMixin.__init__(self)
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class DiscoveryPanel(wx.Panel, listmix.ColumnSorterMixin):
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    def _init_coll_MainSizer_Items(self, parent):
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        parent.Add(self.staticText1,    0, border=20, flag=wx.TOP | wx.LEFT | wx.RIGHT | wx.GROW)
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        parent.Add(self.ServicesList,   0, border=20, flag=wx.LEFT | wx.RIGHT | wx.GROW)
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        parent.Add(self.ButtonGridSizer, 0, border=20, flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.GROW)
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    def _init_coll_MainSizer_Growables(self, parent):
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        parent.AddGrowableCol(0)
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        parent.AddGrowableRow(1)
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    def _init_coll_ButtonGridSizer_Items(self, parent):
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        parent.Add(self.RefreshButton, 0, border=0, flag=0)
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        # parent.Add(self.ByIPCheck, 0, border=0, flag=0)
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    def _init_coll_ButtonGridSizer_Growables(self, parent):
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        parent.AddGrowableCol(0)
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        parent.AddGrowableRow(0)
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    def _init_sizers(self):
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        self.MainSizer = wx.FlexGridSizer(cols=1, hgap=0, rows=3, vgap=10)
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        self.ButtonGridSizer = wx.FlexGridSizer(cols=2, hgap=5, rows=1, vgap=0)
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        self._init_coll_MainSizer_Items(self.MainSizer)
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        self._init_coll_MainSizer_Growables(self.MainSizer)
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        self._init_coll_ButtonGridSizer_Items(self.ButtonGridSizer)
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        self._init_coll_ButtonGridSizer_Growables(self.ButtonGridSizer)
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        self.SetSizer(self.MainSizer)
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    def _init_list_ctrl(self):
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        # Set up list control
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        self.ServicesList = AutoWidthListCtrl(
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            name='ServicesList', parent=self, pos=wx.Point(0, 0), size=wx.Size(0, 0),
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            style=wx.LC_REPORT | wx.LC_EDIT_LABELS | wx.LC_SORT_ASCENDING | wx.LC_SINGLE_SEL)
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        self.ServicesList.InsertColumn(0, _('NAME'))
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        self.ServicesList.InsertColumn(1, _('TYPE'))
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        self.ServicesList.InsertColumn(2, _('IP'))
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        self.ServicesList.InsertColumn(3, _('PORT'))
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        self.ServicesList.SetColumnWidth(0, 150)
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        self.ServicesList.SetColumnWidth(1, 150)
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        self.ServicesList.SetColumnWidth(2, 150)
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        self.ServicesList.SetColumnWidth(3, 150)
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        self.ServicesList.SetInitialSize(wx.Size(-1, 300))
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        self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected, self.ServicesList)
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        self.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.OnItemActivated, self.ServicesList)
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    def _init_ctrls(self, prnt):
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        self.staticText1 = wx.StaticText(
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            label=_('Services available:'), name='staticText1', parent=self,
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            pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
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        self.RefreshButton = wx.Button(
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            label=_('Refresh'), name='RefreshButton', parent=self,
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            pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
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        self.RefreshButton.Bind(wx.EVT_BUTTON, self.OnRefreshButton)
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        # self.ByIPCheck = wx.CheckBox(self, label=_("Use IP instead of Service Name"))
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        # self.ByIPCheck.SetValue(True)
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        self._init_sizers()
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        self.Fit()
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    def __init__(self, parent):
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        wx.Panel.__init__(self, parent)
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        self.parent = parent
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        self._init_list_ctrl()
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        listmix.ColumnSorterMixin.__init__(self, 4)
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        self._init_ctrls(parent)
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        self.itemDataMap = {}
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        self.nextItemId = 0
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        self.URI = None
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        self.Browser = None
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        self.ZeroConfInstance = None
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        self.RefreshList()
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        self.LatestSelection = None
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        self.IfacesMonitorState = None
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        self.IfacesMonitorTimer = wx.Timer(self)
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        self.IfacesMonitorTimer.Start(2000)
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        self.Bind(wx.EVT_TIMER, self.IfacesMonitor, self.IfacesMonitorTimer)
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    def _cleanup(self):
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        if self.IfacesMonitorTimer is not None:
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            self.IfacesMonitorTimer.Stop()
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            self.IfacesMonitorTimer = None
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        if self.Browser is not None:
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            self.Browser.cancel()
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            self.Browser = None
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        if self.ZeroConfInstance is not None:
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            self.ZeroConfInstance.close()
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            self.ZeroConfInstance = None
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    def __del__(self):
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        self._cleanup()
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    def Destroy(self):
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        self._cleanup()
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        wx.Panel.Destroy(self)
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    def IfacesMonitor(self, event):
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        NewState = get_all_addresses()
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        if self.IfacesMonitorState != NewState:
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            if self.IfacesMonitorState is not None:
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                # refresh only if a new address appeared
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                for addr in NewState:
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                    if addr not in self.IfacesMonitorState:
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                        self.RefreshList()
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                        break
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            self.IfacesMonitorState = NewState
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        event.Skip()
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    def RefreshList(self):
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        self.ServicesList.DeleteAllItems()
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        if self.Browser is not None:
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            self.Browser.cancel()
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        if self.ZeroConfInstance is not None:
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            self.ZeroConfInstance.close()
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        self.ZeroConfInstance = Zeroconf()
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        self.Browser = ServiceBrowser(self.ZeroConfInstance, service_type, self)
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    def OnRefreshButton(self, event):
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        self.RefreshList()
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    # Used by the ColumnSorterMixin, see wx/lib/mixins/listctrl.py
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    def GetListCtrl(self):
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        return self.ServicesList
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    def getColumnText(self, index, col):
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        item = self.ServicesList.GetItem(index, col)
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        return item.GetText()
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    def OnItemSelected(self, event):
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        self.SetURI(event.m_itemIndex)
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        event.Skip()
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    def OnItemActivated(self, event):
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        self.SetURI(event.m_itemIndex)
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        self.parent.EndModal(wx.ID_OK)
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        event.Skip()
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#    def SetURI(self, idx):
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#        connect_type = self.getColumnText(idx, 1)
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#        connect_address = self.getColumnText(idx, 2)
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#        connect_port = self.getColumnText(idx, 3)
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#
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#        self.URI = "%s://%s:%s"%(connect_type, connect_address, connect_port)
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    def SetURI(self, idx):
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        self.LatestSelection = idx
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    def GetURI(self):
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        if self.LatestSelection is not None:
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            # if self.ByIPCheck.IsChecked():
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            svcname, scheme, host, port = \
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                [self.getColumnText(self.LatestSelection, col) for col in range(4)]
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            return ("%s://%s:%s#%s" % (scheme, host, port, svcname)) \
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                if scheme[-1] == "S" \
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                else ("%s://%s:%s" % (scheme, host, port))
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            # else:
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            #     svcname = self.getColumnText(self.LatestSelection, 0)
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            #     connect_type = self.getColumnText(self.LatestSelection, 1)
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            #     return str("MDNS://%s" % svcname)
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        return None
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    def remove_service(self, zeroconf, _type, name):
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        wx.CallAfter(self._removeService, name)
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    def _removeService(self, name):
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        '''
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        called when a service with the desired type goes offline.
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        '''
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        # loop through the list items looking for the service that went offline
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        for idx in range(self.ServicesList.GetItemCount()):
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            # this is the unique identifier assigned to the item
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            item_id = self.ServicesList.GetItemData(idx)
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            # this is the full typename that was received by addService
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            item_name = self.itemDataMap[item_id][4]
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            if item_name == name:
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                self.ServicesList.DeleteItem(idx)
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                break
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    def add_service(self, zeroconf, _type, name):
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        wx.CallAfter(self._addService, _type, name)
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    def _addService(self, _type, name):
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        '''
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        called when a service with the desired type is discovered.
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        '''
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        info = self.ZeroConfInstance.get_service_info(_type, name)
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        if info is None:
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            return
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        svcname = name.split(".")[0]
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        typename = info.properties.get("protocol", None)
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        ip = str(socket.inet_ntoa(info.address))
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        port = info.port
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        num_items = self.ServicesList.GetItemCount()
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        # display the new data in the list
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        new_item = self.ServicesList.InsertStringItem(num_items, svcname)
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        self.ServicesList.SetStringItem(new_item, 1, "%s" % typename)
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        self.ServicesList.SetStringItem(new_item, 2, "%s" % ip)
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        self.ServicesList.SetStringItem(new_item, 3, "%s" % port)
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        # record the new data for the ColumnSorterMixin
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        # we assign every list item a unique id (that won't change when items
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        # are added or removed)
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        self.ServicesList.SetItemData(new_item, self.nextItemId)
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        # the value of each column has to be stored in the itemDataMap
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        # so that ColumnSorterMixin knows how to sort the column.
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        # "name" is included at the end so that self.removeService
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        # can access it.
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        self.itemDataMap[self.nextItemId] = [svcname, typename, ip, port, name]
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        self.nextItemId += 1