beremiz

Fix 'DoGetTextExtent - invalid DC' error

2018-06-26, Andrey Skvortsov
3c94bac4526e
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

[-------------------------------------------------------------------------------------------------------------------]
<?xml version='1.0' encoding='utf-8'?>
<project xmlns="http://www.plcopen.org/xml/tc6_0201" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xhtml="http://www.w3.org/1999/xhtml" xsi:schemaLocation="http://www.plcopen.org/xml/tc6_0201">
<fileHeader companyName="Beremiz" productName="Beremiz" productVersion="1" creationDateTime="2012-09-12T23:30:19"/>
<contentHeader name="Wiimote example" modificationDateTime="2017-06-06T13:10:31">
<coordinateInfo>
<fbd>
<scaling x="5" y="5"/>
</fbd>
<ld>
<scaling x="0" y="0"/>
</ld>
<sfc>
<scaling x="0" y="0"/>
</sfc>
</coordinateInfo>
</contentHeader>
<types>
<dataTypes/>
<pous>
<pou name="main" pouType="program">
<interface>
<localVars>
<variable name="x">
<type>
<INT/>
</type>
</variable>
<variable name="y">
<type>
<INT/>
</type>
</variable>
<variable name="a">
<type>
<INT/>
</type>
</variable>
<variable name="b">
<type>
<INT/>
</type>
</variable>
<variable name="c">
<type>
<INT/>
</type>
</variable>
<variable name="b1">
<type>
<WORD/>
</type>
</variable>
<variable name="b0">
<type>
<WORD/>
</type>
</variable>
</localVars>
<externalVars>
<variable name="WiiNunchuckStickX">
<type>
<INT/>
</type>
</variable>
<variable name="WiiNunchuckStickY">
<type>
<INT/>
</type>
</variable>
<variable name="WiiNunchuckButtons">
<type>
<WORD/>
</type>
</variable>
<variable name="WiiButtons">
<type>
<WORD/>
</type>
</variable>
<variable name="WiiNunchuckAccX">
<type>
<INT/>
</type>
</variable>
<variable name="WiiNunchuckAccY">
<type>
<INT/>
</type>
</variable>
<variable name="WiiNunchuckAccZ">
<type>
<INT/>
</type>
</variable>
</externalVars>
</interface>
<body>
<FBD>
<outVariable localId="1" height="30" width="20">
<position x="345" y="40"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="3">
<position x="345" y="55"/>
<position x="295" y="55"/>
</connection>
</connectionPointIn>
<expression>x</expression>
</outVariable>
<inVariable localId="3" height="30" width="150">
<position x="145" y="40"/>
<connectionPointOut>
<relPosition x="150" y="15"/>
</connectionPointOut>
<expression>WiiNunchuckStickX</expression>
</inVariable>
<inVariable localId="4" height="30" width="150">
<position x="145" y="100"/>
<connectionPointOut>
<relPosition x="150" y="15"/>
</connectionPointOut>
<expression>WiiNunchuckStickY</expression>
</inVariable>
<inVariable localId="5" height="30" width="155">
<position x="115" y="175"/>
<connectionPointOut>
<relPosition x="155" y="15"/>
</connectionPointOut>
<expression>WiiNunchuckButtons</expression>
</inVariable>
<inVariable localId="6" height="30" width="90">
<position x="180" y="225"/>
<connectionPointOut>
<relPosition x="90" y="15"/>
</connectionPointOut>
<expression>WiiButtons</expression>
</inVariable>
<outVariable localId="8" height="30" width="20">
<position x="345" y="100"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="4">
<position x="345" y="115"/>
<position x="295" y="115"/>
</connection>
</connectionPointIn>
<expression>y</expression>
</outVariable>
<outVariable localId="9" height="30" width="30">
<position x="345" y="175"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="5">
<position x="345" y="190"/>
<position x="270" y="190"/>
</connection>
</connectionPointIn>
<expression>b1</expression>
</outVariable>
<outVariable localId="10" height="30" width="30">
<position x="345" y="225"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="6">
<position x="345" y="240"/>
<position x="270" y="240"/>
</connection>
</connectionPointIn>
<expression>b0</expression>
</outVariable>
<inVariable localId="11" height="30" width="135">
<position x="135" y="295"/>
<connectionPointOut>
<relPosition x="135" y="15"/>
</connectionPointOut>
<expression>WiiNunchuckAccX</expression>
</inVariable>
<inVariable localId="12" height="30" width="135">
<position x="135" y="340"/>
<connectionPointOut>
<relPosition x="135" y="15"/>
</connectionPointOut>
<expression>WiiNunchuckAccY</expression>
</inVariable>
<inVariable localId="13" height="30" width="130">
<position x="140" y="385"/>
<connectionPointOut>
<relPosition x="130" y="15"/>
</connectionPointOut>
<expression>WiiNunchuckAccZ</expression>
</inVariable>
<outVariable localId="14" height="30" width="20">
<position x="345" y="295"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="11">
<position x="345" y="310"/>
<position x="270" y="310"/>
</connection>
</connectionPointIn>
<expression>a</expression>
</outVariable>
<outVariable localId="15" height="30" width="20">
<position x="345" y="340"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="12">
<position x="345" y="355"/>
<position x="270" y="355"/>
</connection>
</connectionPointIn>
<expression>b</expression>
</outVariable>
<outVariable localId="16" height="30" width="20">
<position x="345" y="385"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="13">
<position x="345" y="400"/>
<position x="270" y="400"/>
</connection>
</connectionPointIn>
<expression>c</expression>
</outVariable>
<comment localId="17" height="125" width="500">
<position x="450" y="30"/>
<content>
<xhtml:p><![CDATA[This example shows interaction of PLC program with Nintendo Wii Remote controller.
To work this example requires python-cwiid library to be installed.]]></xhtml:p>
</content>
</comment>
</FBD>
</body>
<documentation>
<xhtml:p><![CDATA[]]></xhtml:p>
</documentation>
</pou>
</pous>
</types>
<instances>
<configurations>
<configuration name="config">
<resource name="resource1">
<task name="tsk1" interval="T#1ms" priority="0">
<pouInstance name="inst1" typeName="main"/>
</task>
</resource>
</configuration>
</configurations>
</instances>
</project>