_net_wm_state & _net_wm_state_skip_pager

General
1

Hi,

In my gtk4 app, I’m trying to set a couple of hints in _NET_WM_STATE, viz.

_NET_WM_STATE_STICKY
_NET_WM_STATE_BELOW
_NET_WM_STATE_SKIP_PAGER
_NET_WM_STATE_SKIP_TASKBAR

Setting _NET_WM_STATE_STICKY works beautifully out-of-the-box. _NET_WM_STATE_BELOW was disregarded by fvwm3, until I added

Style * EWMHUseStackingOrderHints

to ~/.fvwm/config.

But I cannot figure out why _NET_WM_STATE_SKIP_PAGER & _NET_WM_STATE_SKIP_TASKBAR are getting ignored.

(I’m checking the state with xprop | grep _NET_WM_STATE.)

Here’s the fn I use, I think it’s correct, but just for the reference:

// net_wm_state_set_prop(win, "_NET_WM_STATE_STICKY", 1);
void net_wm_state_set_prop(GtkWidget *win, char *prop, int state) {
  Display *dpy = GDK_SURFACE_XDISPLAY(GDK_SURFACE(gtk_native_get_surface(GTK_NATIVE(win))));
  Window id = GDK_SURFACE_XID(GDK_SURFACE(gtk_native_get_surface(GTK_NATIVE(win))));

  XClientMessageEvent msg = {
    .type = ClientMessage,
    .display = dpy,
    .window = id,
    .message_type = XInternAtom(dpy, "_NET_WM_STATE", False),
    .format = 32,
    .data = {
      .l = {
        state,
        XInternAtom(dpy, prop, False),
        None,
        1,
        0
      }
    }
  };

  if (!XSendEvent(dpy, XRootWindow(dpy, XDefaultScreen(dpy)), False,
                  SubstructureRedirectMask|SubstructureNotifyMask,
                  (XEvent*)&msg))
    g_warning("net_wm_state_set_prop %s=%d failed", prop, state);
}

$ fvwm3 --version
fvwm3 1.0.7 (released)
with support for:  ReadLine, XPM, PNG, SVG, Shape, XShm, SM, Bidi text, XRandR, XRender, XCursor, XFT