Show Menu when application is in full screen and mouse is moved to the top

[louies0623]

When the application is in full screen, the top menu is not displayed when the mouse is moved to the top.

[probonopd]

Good idea. But I currently have no clue how to implement this.

[probonopd]

Menu currently has set:

% xprop | grep ATOM
_NET_WM_ALLOWED_ACTIONS(ATOM) = _NET_WM_ACTION_CHANGE_DESKTOP
_NET_WM_STATE(ATOM) = _NET_WM_STATE_ABOVE, _NET_WM_STATE_STAYS_ON_TOP, _NET_WM_STATE_SKIP_TASKBAR, _NET_WM_STATE_SKIP_PAGER, _KDE_NET_WM_STATE_SKIP_SWITCHER
XdndAware(ATOM) = BITMAP
_NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_DOCK
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW, WM_TAKE_FOCUS, _NET_WM_PING, _NET_WM_SYNC_REQUEST

A full screen browser window has:

% sleep 5 && xprop | grep ATOM
XdndTypeList(ATOM) = STRING, TEXT, UTF8_STRING, _NETSCAPE_URL, text/x-moz-url, text/plain, chromium/x-renderer-taint, text/html
_NET_WM_ALLOWED_ACTIONS(ATOM) = _NET_WM_ACTION_MINIMIZE, _NET_WM_ACTION_FULLSCREEN, _NET_WM_ACTION_CHANGE_DESKTOP, _NET_WM_ACTION_CLOSE
_NET_WM_STATE(ATOM) = _NET_WM_STATE_FULLSCREEN, _NET_WM_STATE_FOCUSED
XdndAware(ATOM) = BITMAP
_NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_NORMAL
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW, _NET_WM_PING, _NET_WM_SYNC_REQUEST

So the first step would be to find a way to make the Menu appear on top of the full screen application (z-stacking order). Then, we would need to check whether any application is full-screen, and set the menu to transparent unless the mouse touches the top area of the screen on which the Menu is.

[probonopd]

It seems that the _NET_WM_STATE_FULLSCREEN hint takes precedence over _NET_WM_STATE_ABOVE. Full-screen windows are handled differently by the window manager (KWin), and they seem to cover all other windows, including those set as "above."

[probonopd]

Strangely, even when we also set _NET_WM_STATE_FULLSCREEN (_NET_WM_STATE(ATOM) = _NET_WM_STATE_FULLSCREEN, _NET_WM_STATE_ABOVE, _NET_WM_STATE_STAYS_ON_TOP, _NET_WM_STATE_SKIP_TASKBAR, _NET_WM_STATE_SKIP_PAGER, _KDE_NET_WM_STATE_SKIP_SWITCHER), it still is not above a full-screen browser window.

[probonopd]

Adding the following to ~/.config/kwinrc also doesn't change this:

[Windows]
WindowClassName=Menu             
State=Above

So if anyone has any idea, please let me know.

[probonopd]

Interestingly, ksnip and the Menu seach box manage to be above even fullscreen. How? Does it have to do with WM_TAKE_FOCUS?