window-deraction-example/decorator.cpp at master · explorer-cs/window-deraction-example · GitHub

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#include "decorator.h"

#include <QWidget>
#include <QX11Info>
#include <QDebug>

#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <xcb/xcb.h>

/*!
 * \brief Decorator::wrapWindow
 * \param w
 * \details
 * Make window do not draw title bar but managed by window manager.
 */
void Decorator::wrapWindow(QWidget *w, bool csd)
{
    MotifWmHints new_hints;

    /* initialize to zero to avoid writing uninitialized data to socket */
    memset(&new_hints, 0, sizeof(new_hints));
    new_hints.flags = MWM_HINTS_DECORATIONS;
    new_hints.decorations = 0;

//    Atom frame_extents;
//    ulong data[4] = {
//        10,
//        10,
//        10,
//        10
//    };

//    frame_extents = XInternAtom (QX11Info::display(), "_GTK_FRAME_EXTENTS", true);
//    if (frame_extents == None)
//        qDebug()<<"no frame extents";

    Atom mwm_hints;
    uchar *hints_data;
    MotifWmHints *hints;
    Atom type;
    int format;
    ulong nitems;
    ulong bytes_after;

    mwm_hints = XInternAtom(QX11Info::display(), "_MOTIF_WM_HINTS", true);
//    if (mwm_hints == None)
//        qDebug()<<"no mwm_hints";
//    else {
//        qDebug()<<w->winId();
//        XChangeProperty(QX11Info::display(),
//                        w->winId(),
//                        frame_extents,
//                        XA_CARDINAL,
//                        32,
//                        PropModeReplace,
//                        (uchar*)&data,
//                        4);
//    }

    XGetWindowProperty (QX11Info::display(),
                        w->winId(),
                        mwm_hints,
                        0,
                        sizeof (MotifWmHints)/sizeof (long),
                        false,
                        AnyPropertyType,
                        &type,
                        &format,
                        &nitems,
                        &bytes_after,
                        &hints_data);

    hints = &new_hints;

    if (type == None)
        hints = &new_hints;
    else {
        hints = (MotifWmHints *)hints_data;
        if (!csd) {
            if (new_hints.flags & MWM_HINTS_FUNCTIONS)
            {
                hints->flags |= MWM_HINTS_FUNCTIONS;
                hints->functions = new_hints.functions;
            }
            if (new_hints.flags & MWM_HINTS_DECORATIONS)
            {
                hints->flags |= MWM_HINTS_DECORATIONS;
                //effect in ukwm, but uneffect in kwin
                hints->decorations = MWM_DECOR_ALL;
            }
        } else {
            if (new_hints.flags & MWM_HINTS_FUNCTIONS)
            {
                hints->flags |= MWM_HINTS_FUNCTIONS;
                hints->functions = new_hints.functions;
            }
            if (new_hints.flags & MWM_HINTS_DECORATIONS)
            {
                hints->flags |= MWM_HINTS_DECORATIONS;
                //effect in ukwm, but uneffect in kwin
                hints->decorations = MWM_DECOR_BORDER;
            }
        }
    }

    //_MOTIF_WM_HINTS
    qDebug()<<XChangeProperty(QX11Info::display(),
                    w->winId(),
                    mwm_hints,
                    mwm_hints,
                    32,
                    PropModeReplace,
                    (uchar*)hints,
                    sizeof (MotifWmHints)/sizeof (long));
}

Decorator::Decorator(QObject *parent) : QObject(parent)
{

}