kwin/killwindow.cpp

/*****************************************************************
kwin - the KDE window manager

Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
******************************************************************/

#ifndef QT_CLEAN_NAMESPACE
#define QT_CLEAN_NAMESPACE
#endif
#include "killwindow.h"
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/keysymdef.h>
#include <X11/cursorfont.h>

KillWindow::KillWindow( Workspace* ws )
    : workspace( ws ) {}

KillWindow::~KillWindow() {}

void KillWindow::start() {
    static Cursor kill_cursor = 0;
    if (!kill_cursor)
        kill_cursor = XCreateFontCursor(qt_xdisplay(), XC_pirate);

    if (XGrabPointer(qt_xdisplay(), qt_xrootwin(), False,
                     ButtonPressMask | ButtonReleaseMask |
                     PointerMotionMask |
                     EnterWindowMask | LeaveWindowMask,
                     GrabModeAsync, GrabModeAsync, None,
                     kill_cursor, CurrentTime) == GrabSuccess)
    {
        XGrabKeyboard(qt_xdisplay(), qt_xrootwin(), False,
                      GrabModeAsync, GrabModeAsync, CurrentTime);

        XEvent ev;
        int return_pressed  = 0;
        int escape_pressed  = 0;
        int button_released = 0;

        XGrabServer(qt_xdisplay());

        while (!return_pressed && !escape_pressed && !button_released)
        {
            XMaskEvent(qt_xdisplay(), KeyPressMask | ButtonPressMask |
                       ButtonReleaseMask | PointerMotionMask, &ev);

            if (ev.type == KeyPress)
            {
                int kc = XKeycodeToKeysym(qt_xdisplay(), ev.xkey.keycode, 0);
                int mx = 0;
                int my = 0;
                return_pressed = (kc == XK_Return) || (kc == XK_space);
                escape_pressed = (kc == XK_Escape);
                if (kc == XK_Left)  mx = -10;
                if (kc == XK_Right) mx = 10;
                if (kc == XK_Up)    my = -10;
                if (kc == XK_Down)  my = 10;
                if (ev.xkey.state & ControlMask)
                {
                    mx /= 10;
                    my /= 10;
                }
                QCursor::setPos(QCursor::pos()+QPoint(mx, my));
            }

            if (ev.type == ButtonRelease)
            {
                button_released = (ev.xbutton.button == Button1);
                workspace->killWindowAtPosition(ev.xbutton.x_root, ev.xbutton.y_root);
            }
            continue;
        }
        if (return_pressed)
            workspace->killWindowAtPosition(QCursor::pos().x(), QCursor::pos().y());

        XUngrabServer(qt_xdisplay());

        XUngrabKeyboard(qt_xdisplay(), CurrentTime);
        XUngrabPointer(qt_xdisplay(), CurrentTime);
    }
}