I am writing a plugin for a system that supplies an X11 window ID and expects
the plugin to render its UI inside that. I want to, therefore, use
CreatedWindow such that I am able to use FLTK in it. The following is a
testcase that blows up in my face just like the real thing:
bash-3.1$ cat test110.cpp
#include <fltk/Window.h>
#include <fltk/run.h>
#include <fltk/x11.h>
#include <X11/Xlib.h>
#include <unistd.h>
int main(int argc, char* argv[]) {
Display* dis = XOpenDisplay(NULL);
XWindow win = XCreateSimpleWindow(dis, RootWindow(dis, 0), 1, 1, 500,
500, 0, BlackPixel (dis, 0), BlackPixel(dis, 0));
XMapWindow(dis, win);
XFlush(dis);
fltk::Window x(500,500);
fltk::CreatedWindow::set_xid(&x, win);
x.show(argc, argv);
fltk::run();
return 0;
}
bash-3.1$
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7a118f0 (LWP 4706)]
0xb7b7e107 in XChangeProperty () from /usr/lib/libX11.so.6
(gdb) bt
#0 0xb7b7e107 in XChangeProperty () from /usr/lib/libX11.so.6
#1 0xb7f79389 in fltk::Window::label () from /usr/lib/libfltk2.so
#2 0xb7fa158b in fltk::Window::label () from /usr/lib/libfltk2.so
#3 0xb7f32767 in fltk::Window::show () from /usr/lib/libfltk2.so
#4 0x08048877 in main (argc=1, argv=0xbfd74fb4) at test110.cpp:14
(gdb)
So how do I do this properly and what am I doing wrong?
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