plcopen/POUVariablesCollector.py
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Tue, 26 Jun 2018 17:34:15 +0300
changeset 2229 3c94bac4526e
parent 1973 cc7a46953471
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, _StringValue, _BoolValue, _translate_args
from plcopen.types_enums import CLASS_TYPES, POU_TYPES, VAR_CLASS_INFOS


def class_extraction(value):
    class_type = CLASS_TYPES.get(value)
    if class_type is not None:
        return class_type

    pou_type = POU_TYPES.get(value)
    if pou_type is not None:
        return pou_type

    var_type = VAR_CLASS_INFOS.get(value)
    if var_type is not None:
        return var_type[1]

    return None


class _VariablesTreeItemInfos(object):
    __slots__ = ["name", "var_class", "type", "edit", "debug", "variables"]

    def __init__(self, *args):
        for attr, value in zip(self.__slots__, args):
            setattr(self, attr, value if value is not None else "")

    def copy(self):
        return _VariablesTreeItemInfos(*[getattr(self, attr) for attr in self.__slots__])


class VariablesTreeInfosFactory(object):

    def __init__(self):
        self.Root = None

    def GetRoot(self):
        return self.Root

    def SetRoot(self, context, *args):
        self.Root = _VariablesTreeItemInfos(
            *([''] + _translate_args(
                [class_extraction, _StringValue] + [_BoolValue] * 2,
                args) + [[]]))

    def AddVariable(self, context, *args):
        if self.Root is not None:
            self.Root.variables.append(_VariablesTreeItemInfos(
                *(_translate_args(
                    [_StringValue, class_extraction, _StringValue] +
                    [_BoolValue] * 2, args) + [[]])))


class POUVariablesCollector(XSLTModelQuery):
    def __init__(self, controller):
        XSLTModelQuery.__init__(self,
                                controller,
                                "pou_variables.xslt",
                                [(name, self.FactoryCaller(name))
                                 for name in ["SetRoot", "AddVariable"]])

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

    def Collect(self, root, debug):
        self.factory = VariablesTreeInfosFactory()
        self._process_xslt(root, debug)
        res = self.factory.GetRoot()
        self.factory = None
        return res