Re: Set desktop strut (reserved screen space for widgets)

[Ralf Van Bogaert <ralf.vanbogaert@...>]

Hi,

I believe the following function (taken from RazorQt) does the strut setting;

void XfitMan::setStrut(Window _wid,
                       int left, int right,
                       int top,  int bottom,

                       int leftStartY,   int leftEndY,
                       int rightStartY,  int rightEndY,
                       int topStartX,    int topEndX,
                       int bottomStartX, int bottomEndX
                       ) const
{
    //qDebug() << "XfitMan: Trying to set STRUT_PARTIAL for panel!";
    //prepare strutsize
    memset(desstrut,0,sizeof(desstrut));
    //prepare the array
    //it has format:
    /*
     * left, right, top, bottom, left_start_y, left_end_y,
     * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
     * bottom_end_x
     *
     */

    //so we take our panelsize from the bottom up
    desstrut[0] = left; desstrut[1] = right;
    desstrut[2] = top;  desstrut[3] = bottom;

    desstrut[4] = leftStartY;    desstrut[5] = leftEndY;
    desstrut[6] = rightStartY;   desstrut[7] = rightEndY;
    desstrut[8] = topStartX;     desstrut[9] = topEndX;
    desstrut[10] = bottomStartX; desstrut[11] = bottomEndX;

    //now we can change that property right
    XChangeProperty(QX11Info::display(), _wid , atom("_NET_WM_STRUT_PARTIAL"),
                    XA_CARDINAL, 32, PropModeReplace,  (unsigned char *) desstrut, 12  );

    //now some wm do not support net_wm_strut_partial but only net_wm_strut, so we also
    // send that one too xdg-std says: if you get a strut_partial ignore all following
    // struts! so if this msg is recognized its ok if not, we dont care either

    XChangeProperty(QX11Info::display(), _wid, atom("_NET_WM_STRUT"),
                    XA_CARDINAL, 32, PropModeReplace, (unsigned char*) desstrut, 4);
}

How would I implement this using FFI? 

Regards

Ralf

On Wed, Mar 28, 2012 at 4:47 PM, Mike Pall <mikelu-1203@mike.de> wrote:

Michal Kottman wrote:
> This should make it possible to get the X11 window handle as lightuserdata,
> which LuaJIT can then use to call the necessary functions.

Yep. But I guess he needs the X11 display handle, too. And that
X11 property stuff is rather ugly, too. Translating from a working
C example would be easiest.

--Mike