Shai Ayal wrote: > I want to force an unconditional redraw, which does not depend on any > external events (e.g. it should work even if the window is hidden) the > next time fl::flush is called. I understand this is not exactly > consistent with fltk's philosophy, but is there a way?
The consistent way is to "damage" the widget/window to force a redraw. You can do gl_window->damage(FL_DAMAGE_ALL); That's exactly what gl_window->redraw(); would do. But I suspect that this doesn't work if the gl window is hidden. > I'm using fltk to draw figures for GNU Octave, using OpenGL. I also > need to produce "hardcopy" (i.e. a postscript file) of the figure. I > do this by using the gl2ps library. I need to redraw to get the file, > and this has to be done even if fltk does not think it really has to > redraw. Which FLTK version are you using? FLTK 1.3 can do this for you with its new Fl_Printer, Fl_PostScript_Printer, and Fl_PostScript_File_Device features. However, AFAICT, this would also only work for shown and fully visible GL windows. Note: the following is just an educated guess, but you could try it anyway if your GL window is hidden: Fl::flush(); // draw everything on screen gl_window->redraw(); // set damage(FL_DAMAGE_ALL) gl_window->make_current(); // set drawing context gl_window->draw(); // call drawing method directly This is officially *not* recommended and I don't know if it would work, but it's short and maybe worth a try. At least I'd assume that the GL window must have been shown once before to create the GL context, but that's also only a guess. And finally, there's also set_visible() and clear_visible() to set and clear (fake) the window's "visible()" status, but it's totally unsupported to do it this way. But maybe... Albrecht _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
