Hi Phil
My idea for a fix is to move the stream initialization that is now on
void wxPLplotwindow<WXWINDOW>::OnCreate( wxWindowCreateEvent &event
{
if ( !m_created )
either to the OnSize or onPaint events
void wxPLplotwindow<WXWINDOW>::OnSize( wxSizeEvent& WXUNUSED( event ) )
and also in the plot call do this
template< class WXWINDOW >
void Plot( wxPLplotwindow<WXWINDOW> *plotwindow )
{
wxPLplotstream* pls = plotwindow->GetStream();
if (pls == NULL)
{
return;
}
Like this , in this sequence
wxPLplotwindow<wxFrame> *frame = new wxPLplotwindow<wxFrame>();
frame->Create( NULL, wxID_ANY, wxT( "wxPLplotDemo" ) );
frame->SetIcon( wxIcon( graph ) );
frame->Show();
Plot( frame );
first we go to
Plot( frame );
but the stream is NULL because
:OnCreate
was not called, but the function returns, avoiding the seg fault
then the window gets a paint or size event, and the stream initialization
code is called
at this time I have a PLplot empty black window
but because
Plot( frame );
was only called at start, it is not called again, so there is no draw
any ideas here ?
of course making the Plot() call in another app function should work
If you could replicate this issue, that would be great.
I am using CentOS 6.8, PLplot.5.11.1 , wxWidgets 3.1.0
----- Original Message -----
From: Pedro Vicente
To: plplot-devel@lists.sourceforge.net ; Phil Rosenberg
Sent: Saturday, December 10, 2016 12:59 AM
Subject: Re: [Plplot-devel] wxPLplotDemo.cpp errors
Hi Phil
So, the issue seems to be the same that I have been reporting
In the wxPLplotDemo.cpp code you have these callling functions
wxPLplotwindow<wxFrame> *frame = new wxPlDemoFrame();
frame->Create( NULL, wxID_ANY, wxT( "wxPLplotDemo" ) );
that make 2 calls to the PLplot library, or the wxWidgets driver of it
all these calls are in the header file wxPLplotwindow.h
first the constructor is called
template<class WXWINDOW>
wxPLplotwindow<WXWINDOW>::wxPLplotwindow( bool useGraphicsContext, wxSize
clientSize )
: m_created( false ), m_initialSize( clientSize )
then this call OnCreate() is called, like you mentioned
and the !m_created bool makes the initialization of the stream happen
the problem is that this function id *NOT* called on my linux build (it is
on the Windows build)
so therefore later
wxPLplotstream* pls = plotwindow->GetStream();
this is NULL, so therefore it seg faults on the plot calls
//! This is called when the widow is created i.e. after WXWINDOW::Create
// has been called. We note that this has been called to avoid attempting
// to redraw a plot on a window that hasn't been created yet.
template<class WXWINDOW>
void wxPLplotwindow<WXWINDOW>::OnCreate( wxWindowCreateEvent &event )
{
if ( !m_created )
so, one quick try is to put the code of
void wxPLplotwindow<WXWINDOW>::OnCreate
that is not called on the constructor maybe ?
-Pedro
----- Original Message -----
From: Pedro Vicente
To: plplot-devel@lists.sourceforge.net ; Phil Rosenberg
Sent: Friday, December 09, 2016 11:57 PM
Subject: [Plplot-devel] wxPLplotDemo.cpp errors
Hi Phil
So, resuming the last thread about wxWidgets, what I did was to build and
run wxPLplotDemo.cpp from PLpplot 5.11.1 on CentOS 6.8
all builds fine, but when I do run , I get a seg fault
[pedro.vicente@rhw9121 c++]$ cd
/data/home002/pvicente/plplot/build/examples/c++
[pedro.vicente@rhw9121 c++]$ ./wxPLplotDemo
Segmentation fault
I know that only this information is not much help to you to debug, but in
the next couple of days I'll be debugging this and posting here any
solution.
my cmake call was
cmake .. -G "Unix
Makefiles" -DBUILD_SHARED_LIBS:BOOL=OFF -DENABLE_f95:BOOL=OFF
-DENABLE_tcl:BOOL=OFF
-DENABLE_tk:BOOL=OFF
-DCMAKE_INSTALL_PREFIX:PATH=/data/data127/pvicente/install/plplot-5.11.1d
-DPL_HAVE_PTHREAD:BOOL=OFF -DPLD_xwin:BOOL=OFF -DPLD_wxwidgets:BOOL=ON
-DwxWidgets_ROOT_DIR:PATH=/data/data127/pvicente/install/wxwidgets-3.1.0
-DwxWidgets_LIB_DIR:PATH=/data/data127/pvicente/install/wxwidgets-3.1.0/lib
-DwxWidgets_CONFIGURATION=mswud -DENABLE_MIX_CXX=ON
-DwxWidgets_EXCLUDE_COMMON_LIBRARIES:BOOL=OFF
-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -DBUILD_TEST:BOOL=ON >& cmake.txt &
the output of
cmake
and
make
are attached
-Pedro
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With one year of Intel Parallel Studio XE.
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