页面比较

#include <X11/Xlib.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    Display *display;
    Window window;
    XEvent event;
    int screen;
     // 打开与X服务器的连接
    display = XOpenDisplay(NULL);
    if (display == NULL) {
        fprintf(stderr, "Cannot open display\n");
        exit(1);
    }

    screen = DefaultScreen(display);

    // 创建一个窗口
    window = XCreateSimpleWindow(display, RootWindow(display, screen), 10, 10, 640, 480, 1,
                                 BlackPixel(display, screen), WhitePixel(display, screen));

    // 选择感兴趣的事件类型
    XSelectInput(display, window, ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask);

    // 显示窗口
    XMapWindow(display, window);

    // 事件循环
    while (1) {
        XNextEvent(display, &event);

        // 处理暴露事件（窗口需要重新绘制）
        if (event.type == Expose) {
            XFillRectangle(display, window, DefaultGC(display, screen), 20, 20, 10, 10);
        }
        // 处理键盘按键按下事件
        else if (event.type == KeyPress) {
            printf("Key pressed: %x\n", event.xkey.keycode);
        }
        // 处理键盘按键抬起事件
        else if (event.type == KeyRelease) {
            printf("Key released: %x\n", event.xkey.keycode);
        }
        // 处理鼠标按键按下事件
        else if (event.type == ButtonPress) {
            printf("Mouse button pressed: %x at (%d, %d)\n", event.xbutton.button, event.xbutton.x, event.xbutton.y);
        }
        // 处理鼠标按键抬起事件
        else if (event.type == ButtonRelease) {
            printf("Mouse button released: %x at (%d, %d)\n", event.xbutton.button, event.xbutton.x, event.xbutton.y);
        }
    }

    // 关闭与X服务器的连接
    XCloseDisplay(display);
    return 0;
}