Thank you for your help! I got a lot further, but still not completely there. I now have a window coming up. When it comes up, it has the "hello world" widget inside, but when I close the window using the window-manager's close button (X decoration), the console produces "X I/O error".
bash-3.1$ ./fltktest X I/O error bash-3.1$ #include <fltk/Window.h> #include <fltk/run.h> #include <fltk/x11.h> #include <X11/Xlib.h> #include <unistd.h> class twindow : public fltk::Window { public: twindow(int x, int y) : fltk::Window(x,y) { } virtual ~twindow() {} virtual void create() { fltk::open_display(); XWindow win = XCreateSimpleWindow(fltk::xdisplay, RootWindow(fltk::xdisplay, fltk::xscreen), 0, 0, 500, 500, 0, 0, 0); XMapWindow(fltk::xdisplay, win); XFlush(fltk::xdisplay); fltk::CreatedWindow::set_xid(this, win); } }; int main(int argc, char* argv[]) { twindow x(500,500); x.begin(); fltk::Widget *box = new fltk::Widget(20, 40, 260, 100, "Hello, World!"); box->box(fltk::UP_BOX); box->labelfont(fltk::HELVETICA_BOLD_ITALIC); box->labelsize(36); box->labeltype(fltk::SHADOW_LABEL); x.end(); x.show(); fltk::run(); return 0; } > > > Whoops=2C don't know how I missed this this morning. > > You don't need a fancy patch or anything like that. > Since fltk hasn't technically opened the display with your CreatedWindow=2C= > before the show() you need to call fltk::open_display() > > There's a good example next to fltk::Window::create()=2C in the documentati= > on! > _______________________________________________ fltk-dev mailing list fltk-dev@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-dev