X11 不会打开窗口

Question

I am trying to open an X11 window, print out one pixel, and then later add code to make Terminate() return true. But it won't make a window. Here is my code:

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <iostream>

int x = 0;
int y = 0;

bool Termination() {
    return true;
}

int main() {
    Display *dspl = XOpenDisplay(NULL);
    if (!dspl) return 1;

    int screenNumber = DefaultScreen(dspl);
    unsigned long white = WhitePixel(dspl, screenNumber);
    unsigned long black = BlackPixel(dspl, screenNumber);

    Window win = XCreateSimpleWindow(dspl, DefaultRootWindow(dspl), 50, 50, 1280, 720, 0, black, white);
    XSetStandardProperties(dspl, win, "Lel", "Gaem", None, NULL, 0, NULL);

    GC gc = XCreateGC(dspl, win, 0,0);
    XSetBackground(dspl, gc, black);
    XSetForeground(dspl, gc, white);
    XClearWindow(dspl, win);
    XMapRaised(dspl, win);

    XDrawPoint(dspl, win, gc, x, y);

    while (Termination())
    {
    }

    XFreeGC(dspl, gc);
    XDestroyWindow(dspl, win);
    XCloseDisplay(dspl);
    printf("Job's done!\n");
    return 0;
}

What's keeping X11 from making my window appear?

Answer 1

add this before the while

  XMapWindow(dspl, win);
  XInternAtom(dspl, "WM_DELETE_WINDOW", False);