tests/wxHMI/HMI@wxglade_hmi/pyfile.xml
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278 a3ac46366b86
parent 1691 9a42f12a973e
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))
[-------------------------------------------------------------]
<?xml version='1.0' encoding='utf-8'?>
<PyFile xmlns:xhtml="http://www.w3.org/1999/xhtml">
  <variables>
    <variable name="Power_ON" type="BOOL"/>
    <variable name="Power_OFF" type="BOOL"/>
    <variable name="DrawTest" type="BOOL"/>
    <variable name="DrawLogo" type="BOOL"/>
    <variable name="DrawEscher" type="BOOL"/>
    <variable name="Detect_Circle" type="BOOL"/>
    <variable name="XaxisPos" type="INT"/>
    <variable name="YaxisPos" type="INT"/>
    <variable name="ZaxisPos" type="INT"/>
    <variable name="TaxisPos" type="INT"/>
    <variable name="XaxisMinus" type="BOOL"/>
    <variable name="YaxisMinus" type="BOOL"/>
    <variable name="ZaxisMinus" type="BOOL"/>
    <variable name="TaxisMinus" type="BOOL"/>
    <variable name="XaxisPlus" type="BOOL"/>
    <variable name="YaxisPlus" type="BOOL"/>
    <variable name="ZaxisPlus" type="BOOL"/>
    <variable name="TaxisPlus" type="BOOL"/>
    <variable name="DrawTestBtn" type="BOOL"/>
    <variable name="DrawTestBtn2" type="BOOL"/>
  </variables>
  <globals>
    <xhtml:p><![CDATA[
import ctypes
import wx, sys

AxisList = ["X","Y","Z","T"]

PwrButtons = ['Power_ON',
              'Power_OFF']

ActionButtons = ['Detect_Circle',
                 'DrawTest',
                 'DrawLogo',
                 'DrawEscher']

class ThreeDee(wx.StaticText):
    def __init__(self, *args, **kwargs):
        self.initialized = False
        kwargs["style"] = wx.ALIGN_CENTRE_HORIZONTAL
        super(ThreeDee, self).__init__(*args, **kwargs)

        self.SetFont(wx.Font(24, wx.SWISS, wx.NORMAL, wx.BOLD))
        
        self.positions = [0.]*4

        self.Message = None
        self.NegLimits = None
        self.Disk = None


    def UpdatePositions(self, positions):
        # get globals from PLC
        self.positions = positions
        self.SetLabel(
            ((self.Message  +'\n\n') if self.Message else '' )+
            " ".join(["%s %+.2f"%(axis,self.positions[i])
                          for i,axis in enumerate(AxisList)]))

def MakeButtonFunc(window, sizer, btname):
    def ButtonDown(event):
        setattr(PLCGlobals,btname,1)
        event.Skip()
    def ButtonUp(event):
        setattr(PLCGlobals,btname,0)
        event.Skip()
    obj = wx.BitmapButton(window, -1, wx.Bitmap('%s.png'%btname))
    sizer.Add(obj, 2, wx.EXPAND, 0)
    obj.Bind(wx.EVT_LEFT_DOWN, ButtonDown)
    obj.Bind(wx.EVT_LEFT_UP, ButtonUp)
    return obj

def UpdPos(self):
    positions = [getattr(PLCGlobals,axname+"axisPos") for axname in AxisList]

    self.window_1.UpdatePositions(positions)

Class_wxglade_hmi.UpdPos = UpdPos


#def UpdatePositions(self, event):
#
#    positions = [getattr(PLCGlobals,axname+"axisPos") for axname in AxisList]
#
#    self.window_1.UpdatePositions(positions)
#
#    event.Skip()

#Class_wxglade_hmi.UpdatePositions = UpdatePositions

initorig = Class_wxglade_hmi.__init__
def Init(self,*args,**kargs):
    initorig(self,*args,**kargs)
    sizer = self.GetSizer().GetItem(1).GetSizer().GetItem(0).GetSizer()
    self.main_buttons = map(
        lambda btname: MakeButtonFunc(self, sizer, btname), PwrButtons)
    sizer = self.GetSizer().GetItem(1).GetSizer().GetItem(1).GetSizer()
    self.main_buttons = map(
        lambda btname: MakeButtonFunc(self, sizer, btname), ActionButtons)
    self.axis_buttons = map(
        lambda axis:( MakeButtonFunc(self, sizer, axis+"axisMinus"), 
                        MakeButtonFunc(self, sizer, axis+"axisPlus")),
        AxisList)

    
    # self.timer = wx.Timer(self, -1)
    # self.Bind(wx.EVT_TIMER, self.UpdatePositions, self.timer)
    # self.ShowFullScreen(True,wx.FULLSCREEN_ALL)
    # wx.CallAfter(self.timer.Start,200)
    
Class_wxglade_hmi.__init__ = Init

def SetPLCTestBtnGlobalVar(self, evt):
    setattr(PLCGlobals, "DrawTestBtn", evt.GetEventObject().GetValue())

def SetPLCTestBtn2GlobalVar(self, evt):
    setattr(PLCGlobals, "DrawTestBtn2", evt.GetEventObject().GetValue())

]]></xhtml:p>
  </globals>
  <init>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </init>
  <cleanup>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </cleanup>
  <start>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </start>
  <stop>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </stop>
</PyFile>