workspace/kwin/effects/mousemark.cpp

   1 /********************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5 Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
   6 Copyright (C) 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 *********************************************************************/
  21
  22 #include "mousemark.h"
  23
  24 #include <kwinconfig.h>
  25
  26 #include <kaction.h>
  27 #include <kactioncollection.h>
  28 #include <kglobal.h>
  29 #include <klocale.h>
  30 #include <kstandarddirs.h>
  31 #include <kconfiggroup.h>
  32
  33 #include <math.h>
  34
  35 #ifdef KWIN_HAVE_OPENGL_COMPOSITING
  36 #include <GL/gl.h>
  37 #endif
  38
  39 #include <kdebug.h>
  40
  41 namespace KWin
  42 {
  43
  44 #define NULL_POINT (QPoint( -1, -1 )) // null point is (0,0), which is valid :-/
  45
  46 KWIN_EFFECT( mousemark, MouseMarkEffect )
  47
  48 MouseMarkEffect::MouseMarkEffect()
  49     {
  50     KActionCollection* actionCollection = new KActionCollection( this );
  51     KAction* a = static_cast< KAction* >( actionCollection->addAction( "ClearMouseMarks" ));
  52     a->setText( i18n( "Clear All Mouse Marks" ));
  53     a->setGlobalShortcut( KShortcut( Qt::SHIFT + Qt::META + Qt::Key_F11 ));
  54     connect( a, SIGNAL( triggered( bool )), this, SLOT( clear()));
  55     a = static_cast< KAction* >( actionCollection->addAction( "ClearLastMouseMark" ));
  56     a->setText( i18n( "Clear Last Mouse Mark" ));
  57     a->setGlobalShortcut( KShortcut( Qt::SHIFT + Qt::META + Qt::Key_F12 ));
  58     connect( a, SIGNAL( triggered( bool )), this, SLOT( clearLast()));
  59
  60     KConfigGroup conf = EffectsHandler::effectConfig("MouseMark");
  61     width = conf.readEntry( "LineWidth", 3 );
  62     color = conf.readEntry( "Color", QColor( Qt::red ));
  63
  64     arrow_start = NULL_POINT;
  65     }
  66
  67 void MouseMarkEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
  68     {
  69     effects->paintScreen( mask, region, data ); // paint normal screen
  70     if( marks.isEmpty() && drawing.isEmpty())
  71         return;
  72     glPushAttrib( GL_ENABLE_BIT | GL_CURRENT_BIT | GL_LINE_BIT );
  73     glColor4f( color.redF(), color.greenF(), color.blueF(), 1 );
  74     glEnable( GL_LINE_SMOOTH );
  75     glLineWidth( width );
  76     foreach( const Mark& mark, marks )
  77         {
  78         glBegin( GL_LINE_STRIP );
  79         foreach( const QPoint& p, mark )
  80             glVertex2i( p.x(), p.y());
  81         glEnd();
  82         }
  83     if( !drawing.isEmpty())
  84         {
  85         glBegin( GL_LINE_STRIP );
  86         foreach( const QPoint& p, drawing )
  87             glVertex2i( p.x(), p.y());
  88         glEnd();
  89         }
  90     glPopAttrib();
  91     }
  92
  93 void MouseMarkEffect::mouseChanged( const QPoint& pos, const QPoint&,
  94     Qt::MouseButtons, Qt::MouseButtons,
  95     Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers )
  96     {
  97     if( modifiers == ( Qt::META | Qt::SHIFT | Qt::CTRL )) // start/finish arrow
  98         {
  99         if( arrow_start != NULL_POINT )
 100             {
 101             marks.append( createArrow( arrow_start, pos ));
 102             arrow_start = NULL_POINT;
 103             effects->addRepaintFull();
 104             return;
 105             }
 106         else
 107             arrow_start = pos;
 108         }
 109     if( arrow_start != NULL_POINT )
 110         return;
 111     // TODO the shortcuts now trigger this right before they're activated
 112     if( modifiers == ( Qt::META | Qt::SHIFT )) // activated
 113         {
 114         if( drawing.isEmpty())
 115             drawing.append( pos );
 116         if( drawing.last() == pos )
 117             return;
 118         QPoint pos2 = drawing.last();
 119         drawing.append( pos );
 120         QRect repaint = QRect( qMin( pos.x(), pos2.x()), qMin( pos.y(), pos2.y()),
 121                                qMax( pos.x(), pos2.x()), qMax( pos.y(), pos2.y()));
 122         repaint.adjust( -width, -width, width, width );
 123         effects->addRepaint( repaint );
 124         }
 125     else if( !drawing.isEmpty())
 126         {
 127         marks.append( drawing );
 128         drawing.clear();
 129         }
 130     }
 131
 132 void MouseMarkEffect::clear()
 133     {
 134     drawing.clear();
 135     marks.clear();
 136     effects->addRepaintFull();
 137     }
 138
 139 void MouseMarkEffect::clearLast()
 140     {
 141     if( arrow_start != NULL_POINT )
 142         {
 143         arrow_start = NULL_POINT;
 144         }
 145     else if( !drawing.isEmpty())
 146         {
 147         drawing.clear();
 148         effects->addRepaintFull();
 149         }
 150     else if( !marks.isEmpty())
 151         {
 152         marks.pop_back();
 153         effects->addRepaintFull();
 154         }
 155     }
 156
 157 MouseMarkEffect::Mark MouseMarkEffect::createArrow( QPoint arrow_start, QPoint arrow_end )
 158     {
 159     Mark ret;
 160     double angle = atan2( (double) (arrow_end.y() - arrow_start.y()), (double) (arrow_end.x() - arrow_start.x()));
 161     ret += arrow_start + QPoint( 50 * cos( angle + M_PI / 6 ),
 162         50 * sin( angle + M_PI / 6 )); // right one
 163     ret += arrow_start;
 164     ret += arrow_end;
 165     ret += arrow_start; // it's connected lines, so go back with the middle one
 166     ret += arrow_start + QPoint( 50 * cos( angle - M_PI / 6 ),
 167         50 * sin( angle - M_PI / 6 )); // left one
 168     return ret;
 169     }
 170
 171 } // namespace
 172
 173 #include "mousemark.moc"