workspace/kwin/effects/logout.cpp

   1 /********************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5 Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *********************************************************************/
  20
  21 #include "logout.h"
  22
  23 #include "kwinglutils.h"
  24
  25 #include <kdebug.h>
  26
  27 namespace KWin
  28 {
  29
  30 KWIN_EFFECT( logout, LogoutEffect )
  31
  32 LogoutEffect::LogoutEffect()
  33     : progress( 0 )
  34     , logout_window( NULL )
  35     {
  36     char net_wm_cm_name[ 100 ];
  37     sprintf( net_wm_cm_name, "_NET_WM_CM_S%d", DefaultScreen( display()));
  38     Atom net_wm_cm = XInternAtom( display(), net_wm_cm_name, False );
  39     Window sel = XGetSelectionOwner( display(), net_wm_cm );
  40     Atom hack = XInternAtom( display(), "_KWIN_LOGOUT_EFFECT", False );
  41     XChangeProperty( display(), sel, hack, hack, 8, PropModeReplace, (unsigned char*)&hack, 1 );
  42     // the atom is not removed when effect is destroyed, this is temporary anyway
  43     }
  44
  45 void LogoutEffect::prePaintScreen( ScreenPrePaintData& data, int time )
  46     {
  47     if( logout_window != NULL )
  48         progress = qBound( 0., progress + time / animationTime( 2000. ), 1. );
  49     else if( progress != 0 )
  50         progress = qBound( 0., progress - time / animationTime( 500. ), 1. );
  51     effects->prePaintScreen( data, time );
  52     }
  53
  54 void LogoutEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
  55     {
  56     if( w != logout_window && progress != 0 )
  57         {
  58         if( effects->saturationSupported() )
  59             {
  60             data.saturation *= ( 1 - progress * 0.8 );
  61             data.brightness *= ( 1 - progress * 0.3 );
  62             }
  63         else // When saturation isn't supported then reduce brightness a bit more
  64             {
  65             data.brightness *= ( 1 - progress * 0.6 );
  66             }
  67         }
  68     effects->paintWindow( w, mask, region, data );
  69     }
  70
  71 void LogoutEffect::postPaintScreen()
  72     {
  73     if( progress != 0 && progress != 1 )
  74         effects->addRepaintFull();
  75     effects->postPaintScreen();
  76     }
  77
  78 void LogoutEffect::windowAdded( EffectWindow* w )
  79     {
  80     if( isLogoutDialog( w ))
  81         {
  82         logout_window = w;
  83         progress = 0;
  84         effects->addRepaintFull();
  85         }
  86     }
  87
  88 void LogoutEffect::windowClosed( EffectWindow* w )
  89     {
  90     if( w == logout_window )
  91         {
  92         logout_window = NULL;
  93         effects->addRepaintFull();
  94         }
  95     }
  96
  97 bool LogoutEffect::isLogoutDialog( EffectWindow* w )
  98     { // TODO there should be probably a better way (window type?)
  99     if( w->windowClass() == "ksmserver ksmserver"
 100         && ( w->windowRole() == "logoutdialog" || w->windowRole() == "logouteffect" ))
 101         {
 102         return true;
 103         }
 104     return false;
 105     }
 106
 107 } // namespace