beremiz

Fix 'DoGetTextExtent - invalid DC' error

2018-06-26, Andrey Skvortsov
3c94bac4526e
file isExecutable
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)
: 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)
: 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, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
# Copyright (C) 2017: Andrey Skvortsov
#
# See COPYING file for copyrights details.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# Package initialisation
"""
Beremiz Targets
- Target are python packages, containing at least one "XSD" file
- Target class may inherit from a toolchain_(toolchainname)
- The target folder's name must match to name define in the XSD for TargetType
"""
from __future__ import absolute_import
from os import listdir, path
import util.paths as paths
_base_path = paths.AbsDir(__file__)
def _GetLocalTargetClassFactory(name):
return lambda: getattr(__import__(name, globals(), locals()), name+"_target")
targets = dict([(name, {"xsd": path.join(_base_path, name, "XSD"),
"class": _GetLocalTargetClassFactory(name),
"code": {fname: path.join(_base_path, name, fname)
for fname in listdir(path.join(_base_path, name))
if (fname.startswith("plc_%s_main" % name) and
fname.endswith(".c"))}})
for name in listdir(_base_path)
if (path.isdir(path.join(_base_path, name)) and
not name.startswith("__"))])
toolchains = {"gcc": path.join(_base_path, "XSD_toolchain_gcc"),
"makefile": path.join(_base_path, "XSD_toolchain_makefile")}
def GetBuilder(targetname):
return targets[targetname]["class"]()
def GetTargetChoices():
DictXSD_toolchain = {}
targetchoices = ""
# Get all xsd toolchains
for toolchainname, xsdfilename in toolchains.iteritems():
if path.isfile(xsdfilename):
DictXSD_toolchain["toolchain_"+toolchainname] = open(xsdfilename).read()
# Get all xsd targets
for _targetname, nfo in targets.iteritems():
xsd_string = open(nfo["xsd"]).read()
targetchoices += xsd_string % DictXSD_toolchain
return targetchoices
def GetTargetCode(targetname):
codedesc = targets[targetname]["code"]
code = "\n".join([open(fpath).read() for _fname, fpath in sorted(codedesc.items())])
return code
def GetHeader():
filename = paths.AbsNeighbourFile(__file__, "beremiz.h")
return open(filename).read()
def GetCode(name):
filename = paths.AbsNeighbourFile(__file__, name)
return open(filename).read()