tests/wiimote/wxglade_hmi@wxglade_hmi/hmi.wxg
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278 a3ac46366b86
parent 1157 72d14a74c643
permissions -rw-r--r--
Dirty fix for error '_object_has_no_attribute_'getSlave' in EtherCAT extension

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/IDEFrame.py", line 1433, in OnPouSelectedChanged
window.RefreshView()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 837, in RefreshView
self.RefreshProcessVariables()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 886, in RefreshProcessVariables
slaves = self.Controler.GetSlaves(**self.CurrentNodesFilter)
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/EthercatMaster.py", line 341, in GetSlaves
for slave in self.Config.getConfig().getSlave():
<type 'exceptions.AttributeError'>:_'lxml.etree._Element'_object_has_no_attribute_'getSlave'

Steps to reproduce problem:

- Add new EtherCAT master
- Add new EthercatNode to the master
- double click on


this is looks like dirty hack to fix strange problem with initial[0]
changing its type after returning from _init_ method to lxml.etree._Element
As a result all methods generated by class factory are lost.

For example, in function initMethod initial[0].__class__ points to
xmlclass.xmlclass.Config. After map(self.append, initial)
self.Config.__class__ is 'xmlclass.xmlclass.Config' as well.
But after returning from initMethod (_init) in CreateElement
self.Config.__class__ has changed to lxml.etree._Element.


I've noticed similar behavior if copy/deepcopy is used for any child
of etree.ElementBase. See simple example below.
[-------------------------------------------------------------]
#!/usr/bin/python

from __future__ import print_function
from lxml import etree
import copy

class DefaultElementClass(etree.ElementBase):
def getLocalTag(self):
return etree.QName(self.tag).localname


def printInformation(x):
print(x, x.__class__, "getLocalTag" in dir(x))


a = DefaultElementClass()
printInformation(a)

#
printInformation(copy.copy(a))
printInformation(copy.deepcopy(a))
[-------------------------------------------------------------]
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<?xml version="1.0"?>
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<!-- generated by wxGlade 0.6.4 on Thu May 16 13:24:16 2013 -->
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<application path="" name="" class="" option="0" language="python" top_window="wxglade_hmi" encoding="UTF-8" use_gettext="0" overwrite="0" use_new_namespace="1" for_version="2.8" is_template="0" indent_amount="4" indent_symbol="space" source_extension=".cpp" header_extension=".h">
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    <object class="Class_wxglade_hmi" name="wxglade_hmi" base="EditFrame">
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        <style>wxDEFAULT_FRAME_STYLE</style>
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        <title>frame_1</title>
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        <object class="wxStaticBoxSizer" name="sizer_1" base="EditStaticBoxSizer">
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            <orient>wxVERTICAL</orient>
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            <label>Wiimote Test</label>
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            <object class="sizeritem">
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                <flag>wxEXPAND</flag>
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                <border>0</border>
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                <option>0</option>
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                <object class="wxButton" name="button_1" base="EditButton">
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                    <label>Connect Wiimote</label>
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                    <events>
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                        <handler event="EVT_BUTTON">OnConnectButton</handler>
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                    </events>
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                </object>
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            </object>
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            <object class="sizeritem">
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                <flag>wxEXPAND</flag>
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                <border>0</border>
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                <option>0</option>
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                <object class="wxButton" name="button_2" base="EditButton">
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                    <label>Disconnect Wiimote</label>
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                    <events>
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                        <handler event="EVT_BUTTON">OnDisconnectButton</handler>
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                    </events>
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                </object>
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            </object>
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            <object class="sizeritem">
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                <flag>wxEXPAND</flag>
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                <border>0</border>
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                <option>0</option>
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                <object class="wxStaticText" name="label_1" base="EditStaticText">
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                    <attribute>1</attribute>
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                    <label>Status :</label>
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                </object>
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            </object>
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            <object class="sizeritem">
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                <flag>wxEXPAND</flag>
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                <border>0</border>
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                <option>0</option>
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                <object class="wxStaticText" name="label_2" base="EditStaticText">
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                    <attribute>1</attribute>
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                    <label>no status</label>
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                </object>
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            </object>
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        </object>
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    </object>
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</application>