plcopen/InstanceTagnameCollector.py
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Tue, 26 Jun 2018 17:34:15 +0300
changeset 2229 3c94bac4526e
parent 1953 5736d25bb393
child 3750 f62625418bff
permissions -rw-r--r--
Fix 'DoGetTextExtent - invalid DC' error

most likely this error happens only on certain wx backends.
GTK3+ on GNU/Linux is apparently one of them.
The problem is described in wxWidgets issue tracker.
http://trac.wxwidgets.org/ticket/12486

[-------------------------------------------------------------------------------------------------------------------]
platform:
Linux-4.16.0-2-rt-amd64-x86_64-with-debian-buster-sid

python-version:
2.7.15

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 1605, in DispatchDebugValuesProc
self.CallWeakcallables("__tick__", "NewDataAvailable", debug_ticks)
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 1585, in CallWeakcallables
function(*cargs)
File "/home/developer/WorkData/PLC/beremiz/beremiz/editors/Viewer.py", line 1217, in NewDataAvailable
refresh_rect.Union(element.GetRedrawRect())
File "/home/developer/WorkData/PLC/beremiz/beremiz/graphics/GraphicCommons.py", line 1609, in GetRedrawRect
self.ValueSize = self.Parent.GetMiniTextExtent(self.ComputedValue)
File "/home/developer/WorkData/PLC/beremiz/beremiz/editors/Viewer.py", line 932, in GetMiniTextExtent
return self.MiniTextDC.GetTextExtent(text)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_gdi.py", line 4127, in GetTextExtent
return _gdi_.DC_GetTextExtent(*args, **kwargs)
<class 'wx._core.PyAssertionError'>: C++ assertion "m_graphicContext" failed at ../src/common/dcgraph.cpp(1160) in DoGetTextExtent(): wxGCDC(cg)::DoGetTextExtent - invalid DC

wx-platform:
__WXGTK__

wx-version:
3.0.2.0

[-------------------------------------------------------------------------------------------------------------------]

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/LogViewer.py", line 740, in OnMessageToolTipTimer
self.MessageToolTip.SetFont(self.Font)
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/CustomToolTip.py", line 75, in SetFont
self.RefreshTip()
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/CustomToolTip.py", line 158, in RefreshTip
self.SetClientSize(self.GetToolTipSize())
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/CustomToolTip.py", line 145, in GetToolTipSize
w, h = dc.GetTextExtent(line)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_gdi.py", line 4127, in GetTextExtent
return _gdi_.DC_GetTextExtent(*args, **kwargs)
<class 'wx._core.PyAssertionError'>: C++ assertion "m_graphicContext" failed at ../src/common/dcgraph.cpp(1160) in DoGetTextExtent(): wxGCDC(cg)::DoGetTextExtent - invalid DC

[-------------------------------------------------------------------------------------------------------------------]
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz.
# See COPYING file for copyrights details.

from __future__ import absolute_import
from plcopen.XSLTModelQuery import XSLTModelQuery
from plcopen.types_enums import *


class InstanceTagName(object):
    """Helpers object for generating instance tagname"""

    def __init__(self):
        self.TagName = None

    def GetTagName(self):
        return self.TagName

    def ConfigTagName(self, context, *args):
        self.TagName = ComputeConfigurationName(args[0][0])

    def ResourceTagName(self, context, *args):
        self.TagName = ComputeConfigurationResourceName(args[0][0], args[1][0])

    def PouTagName(self, context, *args):
        self.TagName = ComputePouName(args[0][0])

    def ActionTagName(self, context, *args):
        self.TagName = ComputePouActionName(args[0][0], args[0][1])

    def TransitionTagName(self, context, *args):
        self.TagName = ComputePouTransitionName(args[0][0], args[0][1])


class InstanceTagnameCollector(XSLTModelQuery):
    """ object for collecting instances path list"""
    def __init__(self, controller):
        XSLTModelQuery.__init__(self,
                                controller,
                                "instance_tagname.xslt",
                                [(name, self.FactoryCaller(name))
                                 for name in ["ConfigTagName",
                                              "ResourceTagName",
                                              "PouTagName",
                                              "ActionTagName",
                                              "TransitionTagName"]])

    def FactoryCaller(self, funcname):
        def CallFactory(*args):
            return getattr(self.factory, funcname)(*args)
        return CallFactory

    def Collect(self, root, debug, instance_path):
        self.factory = InstanceTagName()
        self._process_xslt(root, debug, instance_path=instance_path)
        res = self.factory.GetTagName()
        self.factory = None
        return res