c – 带有Xlib的空或透明窗口仅显示边框线

只有当您的X11和图形硬件配置支持深度为32位的视觉效果时,它才会起作用.

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

int main(int argc,char* argv[])
{
    Display* display = XOpenDisplay(null);

    XVisualInfo vinfo;
    XMatchVisualInfo(display,DefaultScreen(display),32,TrueColor,&vinfo);

    XSetWindowAttributes attr;
    attr.colormap = XCreateColormap(display,DefaultRootWindow(display),vinfo.visual,AllocNonE);
    attr.border_pixel = 0;
    attr.BACkground_pixel = 0;

    Window win = XCreateWindow(display,300,200,vinfo.depth,InputOutput,CWColormap | CWBorderPixel | CWBACkPixel,&attr);
    XSELEcTinput(display,win,StructureNotifymask);
    GC gc = XCreateGC(display,0);

    Atom wm_delete_window = XInternAtom(display,"WM_deletE_WINDOW",0);
    XSetWMProtocols(display,&wm_delete_window,1);

    XMapWindow(display,win);

    int keep_running = 1;
    XEvent event;

    while (keep_running) {
        XNextEvent(display,&event);

        switch(event.typE) {
            case Clientmessage:
                if (event.xclient.message_type == XInternAtom(display,"WM_PROTOCOLS",1) && (Atom)event.xclient.data.l[0] == XInternAtom(display,1))
                    keep_running = 0;

                break;

            default:
                break;
        }
    }

    XDestroyWindow(display,win);
    XCloseDisplay(display);
    return 0;
}