On 2017-03-03 16:02-0000 Phil Rosenberg wrote: > Hi Alan > Sorry for not replying sooner. I was waiting until I had time to > actually read the code, which unfortunately I haven't had chance to do > still, but I didn't want to leave it any longer without at least > guessing what might be happening.
Hi Phil: Your guesses are quite helpful so keep them coming. :-) > > So a couple of things spring to mind. Firstly you must at some point > renter the event loop to allow the viewer to start doing stuff again. > If you are sat in a loop in you communication code just waiting for > something to happen then it never will because the execution point is > in your communication code and not dealing with the mouse pointer. > calling wxYield will go check the event loop, deal with that stuff > then return, but it's often not the best solution because nested calls > to wxYield aren't permitted. If possible it is better to return from > your function and use some other event to trigger your return > communication. Perhaps this could be at the end of the method that > deals with capturing mouse activity. > > Another thing is that to cause the plot to be redrawn you must tell > wxWidgets that there is something new to draw. I think the method for > this is Refresh(). Then you must allow the event loop to be entered to > allow the redraw to actually take place. > > A final thing to think about is that locate must be dealt with > immediately. It sounded like you were holding locate requests and > continuing to send plot commands. But maybe I misunderstood this as > doing so would hang the plplot side while pllocate awaited it's > return. > > As I said I haven't looked at the code, just read your email, but > these are the first places to look as a guess. > > Also there is a debug #define which when used means that plplot does > not launch the viewer, instead it just sits and waits for you to > launch it manually. This way you can launch the viewer in a debugger > to see what is going on in there. Thanks, for those ideas which I haven't completely absorbed yet, but I will look closely at them later. The reason for putting that off is there is a new surprising result I have established which is even for -DPL_WXWIDGETS_IPC2=OFF examples/c/x01c -dev wxwidgets -locate does not work correctly, i.e., there is no display of the plot until after you have clicked the mouse away from where you guess a viewport will appear. So the net result is locate mode must be finished before the plot can appear. So it was this code I was trying to follow for the -DPL_WXWIDGETS_IPC2=ON case, but that is obviously not a good model to follow. (By the way, I would not advise working on that -DPL_WXWIDGETS_IPC2=OFF issue because there is a good possibility (assuming you like everything about the new -DPL_WXWIDGETS_IPC2=ON approach once you have had a chance to look at it) that the -DPL_WXWIDGETS_IPC2=OFF code will be completely removed once I get -DPL_WXWIDGETS_IPC2=ON working for this example.) Just now I tried the third (deprecated) version of the wxwidgets code using -DOLD_WXWIDGETS=ON, and that works fine with the above example with both mouse clicks and key presses being properly reported. Therefore, I have a lot of hope that a deeper look into that deprecated code will give me a model I can follow to get the above example to work correctly with -DPL_WXWIDGETS_IPC2=ON. So please remain ready to answer questions this weekend just in case I need some further help to try and translate how that deprecated code implements interactivity to the -DPL_WXWIDGETS_IPC2=ON case. 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 __________________________ ------------------------------------------------------------------------------ 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
