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     reconfigure( ReconfigureAll );
  60     arrow_start = NULL_POINT;
  61     }
  62
  63 void MouseMarkEffect::reconfigure( ReconfigureFlags )
  64     {
  65     KConfigGroup conf = EffectsHandler::effectConfig("MouseMark");
  66     width = conf.readEntry( "LineWidth", 3 );
  67     color = conf.readEntry( "Color", QColor( Qt::red ));
  68     }
  69
  70 void MouseMarkEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
  71     {
  72     effects->paintScreen( mask, region, data ); // paint normal screen
  73     if( marks.isEmpty() && drawing.isEmpty())
  74         return;
  75     glPushAttrib( GL_ENABLE_BIT | GL_CURRENT_BIT | GL_LINE_BIT );
  76     glColor4f( color.redF(), color.greenF(), color.blueF(), 1 );
  77     glEnable( GL_LINE_SMOOTH );
  78     glLineWidth( width );
  79     foreach( const Mark& mark, marks )
  80         {
  81         glBegin( GL_LINE_STRIP );
  82         foreach( const QPoint& p, mark )
  83             glVertex2i( p.x(), p.y());
  84         glEnd();
  85         }
  86     if( !drawing.isEmpty())
  87         {
  88         glBegin( GL_LINE_STRIP );
  89         foreach( const QPoint& p, drawing )
  90             glVertex2i( p.x(), p.y());
  91         glEnd();
  92         }
  93     glPopAttrib();
  94     }
  95
  96 void MouseMarkEffect::mouseChanged( const QPoint& pos, const QPoint&,
  97     Qt::MouseButtons, Qt::MouseButtons,
  98     Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers )
  99     {
 100     if( modifiers == ( Qt::META | Qt::SHIFT | Qt::CTRL )) // start/finish arrow
 101         {
 102         if( arrow_start != NULL_POINT )
 103             {
 104             marks.append( createArrow( arrow_start, pos ));
 105             arrow_start = NULL_POINT;
 106             effects->addRepaintFull();
 107             return;
 108             }
 109         else
 110             arrow_start = pos;
 111         }
 112     if( arrow_start != NULL_POINT )
 113         return;
 114     // TODO the shortcuts now trigger this right before they're activated
 115     if( modifiers == ( Qt::META | Qt::SHIFT )) // activated
 116         {
 117         if( drawing.isEmpty())
 118             drawing.append( pos );
 119         if( drawing.last() == pos )
 120             return;
 121         QPoint pos2 = drawing.last();
 122         drawing.append( pos );
 123         QRect repaint = QRect( qMin( pos.x(), pos2.x()), qMin( pos.y(), pos2.y()),
 124                                qMax( pos.x(), pos2.x()), qMax( pos.y(), pos2.y()));
 125         repaint.adjust( -width, -width, width, width );
 126         effects->addRepaint( repaint );
 127         }
 128     else if( !drawing.isEmpty())
 129         {
 130         marks.append( drawing );
 131         drawing.clear();
 132         }
 133     }
 134
 135 void MouseMarkEffect::clear()
 136     {
 137     drawing.clear();
 138     marks.clear();
 139     effects->addRepaintFull();
 140     }
 141
 142 void MouseMarkEffect::clearLast()
 143     {
 144     if( arrow_start != NULL_POINT )
 145         {
 146         arrow_start = NULL_POINT;
 147         }
 148     else if( !drawing.isEmpty())
 149         {
 150         drawing.clear();
 151         effects->addRepaintFull();
 152         }
 153     else if( !marks.isEmpty())
 154         {
 155         marks.pop_back();
 156         effects->addRepaintFull();
 157         }
 158     }
 159
 160 MouseMarkEffect::Mark MouseMarkEffect::createArrow( QPoint arrow_start, QPoint arrow_end )
 161     {
 162     Mark ret;
 163     double angle = atan2( (double) (arrow_end.y() - arrow_start.y()), (double) (arrow_end.x() - arrow_start.x()));
 164     ret += arrow_start + QPoint( 50 * cos( angle + M_PI / 6 ),
 165         50 * sin( angle + M_PI / 6 )); // right one
 166     ret += arrow_start;
 167     ret += arrow_end;
 168     ret += arrow_start; // it's connected lines, so go back with the middle one
 169     ret += arrow_start + QPoint( 50 * cos( angle - M_PI / 6 ),
 170         50 * sin( angle - M_PI / 6 )); // left one
 171     return ret;
 172     }
 173
 174 } // namespace
 175
 176 #include "mousemark.moc"