Hi Phil >This is because there is no > requirement to call Show() immediately after window creation.
that's true. but if a user wants to see the plot, he *has* to create Show() at some time, because Show() displays the window on screen. when he does, then that is the time to create the stream. if it does not call Show() , then there is no window and no stream (assuming we remove the OnCreate() creation) > while(!m_created) > wxYield(); where is the place to put this code? in the demo client or in wxplplotwindow? -Pedro ----- Original Message ----- From: "Phil Rosenberg" <p.d.rosenb...@gmail.com> To: "Pedro Vicente" <pedro.vice...@space-research.org> Cc: "Alan W. Irwin" <ir...@beluga.phys.uvic.ca>; "PLplot development list" <plplot-devel@lists.sourceforge.net> Sent: Sunday, December 18, 2016 6:27 PM Subject: Re: [Plplot-devel] wxPLplotDemo.cpp -- linux build error > Hi Pedro > Ah, I had assumed that the OnCreate event was not being triggered at > all. I now understand what is happening. Or at least I think I do ;-) > Actually now you have pointed out the issue I am surprised the code > works on any platform. > > The error is in the wxplplotdemo code, not in the wxplplotwindow. In > the demo we must simply wait for the OnCreate message to arrive and be > processed before we grab the stream in Plot(). We may be able to do > that with > while(!m_created) > wxYield(); > > Could you try the above instead of your overloaded Show() fix please? > You can check out an older version of Plplot by using > git checkout 3cccca6a49a572e7aa518a5b8a6bbecd9ef1f812 > which will have your debug code in, but not your Show() fix. > > Unfortunately, although your fix does work for the example as it is > written, it will not work in general. This is because there is no > requirement to call Show() immediately after window creation. > > I am sorry that I have not been able to go through this in huge detail > with you as fast as I would have liked. I have rather a lot on at work > and I'm sure you understand I have to give that priority. > > Phil > > > On 16 December 2016 at 18:01, Pedro Vicente > <pedro.vice...@space-research.org> wrote: >> Hi Phil, Alan >> >> I tried evtCreateExample.cpp and I get the good expected result. >> This just means that for this simple example the OnCreate event is >> triggered. >> >> To note that on my bad results of the PLplot demo, the OnCreate event is >> *also* triggered. >> the problem is that is triggered after the plot was made >> >> >> 11:09:13: Debug: wxPLplotwindow::wxPLplotwindow >> 11:09:13: Debug: frame->Create >> 11:09:13: Debug: pls NULL >> 11:09:13: Debug: wxPLplotwindow::OnCreate >> >> I am not that familiar with the wxWidgets internals but it seems events >> are >> put in a queue. >> >> http://docs.wxwidgets.org/3.1/overview_events.html >> >> it could be that the event is not processed in the expected order or >> delayed >> for some reason. >> this could be a good question for the wxWidgets support list. >> >> -Pedro >> >> >> >> On 2016-12-15 21:11, Alan W. Irwin wrote: >>> >>> On 2016-12-16 01:05-0000 Phil Rosenberg wrote: >>> >>>> Hmm - well another theory down in smoke. >>>> >>>> Attached is an absolute minimum example of the use of wxEVT_CREATE. On >>>> Windows I get the expected behaviour of a popup dialog appearing >>>> before the frame saying "OnCreate called." >>>> >>>> Could you try it on one of your Linux machines? I'm afraid it's way >>>> past my bedtime here in the UK, so I'll have to continue tomorrow. >>> >>> >>> @Pedro: You should do this test as well since your Linux platforms >>> are the ones where >>> (so far at least) issues are showing up. But for what it is worth, I >>> did the following >>> >>> irwin@raven> g++ $(wx-config --cppflags --libs) evtCreateExample.cpp >>> >>> to successfully (no errors/warnings) build Phil's test application. >>> >>> Then I ran it with >>> >>> irwin@raven> ./a.out >>> >>> and a popup window came up (apparently as a subGUI of a grey GUI blank >>> called "My Frame") with the "OnCreate Called" message displayed (which >>> I understand was the expected result when everything is working >>> properly). >>> >>> I hope that experiment helps you guys to gain some insight in what the >>> heck is going on for wxwidgets-gtk+ on Linux. >>> >>> Alan >>> __________________________ >>> Alan W. Irwin >>> >>> Astronomical research affiliation with Department of Physics and >>> Astronomy, >>> University of Victoria (astrowww.phys.uvic.ca). >>> >>> Programming affiliations with the FreeEOS equation-of-state >>> implementation for stellar interiors (freeeos.sf.net); the Time >>> Ephemerides project (timeephem.sf.net); PLplot scientific plotting >>> software package (plplot.sf.net); the libLASi project >>> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); >>> and the Linux Brochure Project (lbproject.sf.net). >>> __________________________ >>> >>> Linux-powered Science >>> __________________________ >> >> >> -- >> Pedro Vicente >> pedro.vice...@space-research.org >> http://www.space-research.org/ > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
