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CygWin How to create a Window with GNU C++ that can be move without a X-Server Window Manager

like the Subject of the Topic said:

  • CygWin for Windows comes with a X-Server port for Windows
  • How can I create a "moveable" Window, with the X-Server functions that are available when you (me) programming with the GNU C++ Compiler
  • I have already programming with Qt5 but I would do this with built-in Functions from the X-Server without the useing of a Window Manager

Thanks for reading, and Helping Feedback

  • I already able to create a Window with Qt5 Framework but this Framework need a huge amount of space because the big libraries that come with
  • I expecting a small Example without using any Framework, only the X-Server Functions that are available for Cygwin X-Server
Solution

  • Followed the [YouTube]: Future Tech Labs - X11 Tutorials - 1 - Creating a Simple Window tutorial, and came up with the following (dummy) example.

    main00.c:

    #include <stdio.h>

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


int main()
{
    Display *pd = NULL;
    if ((pd = XOpenDisplay((char*)NULL)) == NULL) {
        printf("XOpenDisplay error\n");
        return -1;
    }
    int scr = DefaultScreen(pd);
    Window win = XCreateSimpleWindow(pd, RootWindow(pd, scr),
        100, 100, 320, 200, 15, BlackPixel(pd, scr), WhitePixel(pd, scr));
    XSetStandardProperties(pd, win, "Cygwin X q075977479", "q075977479", None, NULL, 0, NULL);
    XMapWindow(pd, win);

    XEvent ev;

    while (XNextEvent(pd, &ev) == 0) {
    }

    XUnmapWindow(pd, win);
    XDestroyWindow(pd, win);
    XCloseDisplay(pd);

    printf("\nDone.\n\n");
    return 0;
}

    Output:

    [cfati@cfati-5510-0:/cygdrive/e/Work/Dev/StackExchange/StackOverflow/q075977479]> ~/sopr.sh
### Set shorter prompt to better fit when pasted in StackOverflow (or other) pages ###

[064bit prompt]> uname -a
CYGWIN_NT-10.0-19045 cfati-5510-0 3.4.6-1.x86_64 2023-02-14 13:23 UTC x86_64 Cygwin
[064bit prompt]> ls
main00.c
[064bit prompt]> gcc main00.c -o main00.exe -lX11
[064bit prompt]> ls
main00.c  main00.exe
[064bit prompt]> DISPLAY=:0 ./main00.exe

    And the window:

    Img0

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