src/regiongrabber.cpp

   1 // Code from KSnapshot!
   2
   3 /*
   4   Copyright (C) 2003 Nadeem Hasan <nhasan@kde.org>
   5
   6   This library is free software; you can redistribute it and/or
   7   modify it under the terms of the GNU General Public
   8   License as published by the Free Software Foundation; either
   9   version 2 of the License, or ( at your option ) any later version.
  10
  11   This program is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14   Library General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with this library; see the file COPYING.  If not, write to
  18   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19   Boston, MA 02110-1301, USA.
  20 */
  21
  22 #include "regiongrabber.h"
  23
  24 #include <qapplication.h>
  25 #include <qpainter.h>
  26 #include <qpalette.h>
  27 #include <qstyle.h>
  28 #include <qtimer.h>
  29 #include <qtooltip.h>
  30 //Added by qt3to4:
  31 #include <QPixmap>
  32 #include <QLabel>
  33 #include <QMouseEvent>
  34 #include <Q3Frame>
  35 #include <QKeyEvent>
  36
  37 #include <kglobalsettings.h>
  38
  39 SizeTip::SizeTip( QWidget *parent, const char *name )
  40     : QLabel( parent, name, WStyle_Customize | WX11BypassWM |
  41       WStyle_StaysOnTop | WStyle_NoBorder | WStyle_Tool )
  42 {
  43   setMargin( 2 );
  44   setIndent( 0 );
  45   setFrameStyle( Q3Frame::Plain | Q3Frame::Box );
  46
  47   setPalette( QToolTip::palette() );
  48 }
  49
  50 void SizeTip::setTip( const QRect &rect )
  51 {
  52   QString tip = QString( "%1x%2" ).arg( rect.width() )
  53       .arg( rect.height() );
  54
  55   setText( tip );
  56   adjustSize();
  57
  58   positionTip( rect );
  59 }
  60
  61 void SizeTip::positionTip( const QRect &rect )
  62 {
  63   QRect tipRect = geometry();
  64   tipRect.moveTopLeft( QPoint( 0, 0 ) );
  65
  66   if ( rect.intersects( tipRect ) )
  67   {
  68     QRect deskR = KGlobalSettings::desktopGeometry( QPoint( 0, 0 ) );
  69
  70     tipRect.moveCenter( QPoint( deskR.width()/2, deskR.height()/2 ) );
  71     if ( !rect.contains( tipRect, true ) && rect.intersects( tipRect ) )
  72       tipRect.moveBottomRight( geometry().bottomRight() );
  73   }
  74
  75   move( tipRect.topLeft() );
  76 }
  77
  78 RegionGrabber::RegionGrabber(int delay)
  79   : QWidget( 0, 0 ),
  80     mouseDown( false ), sizeTip( 0L )
  81 {
  82   sizeTip = new SizeTip( ( QWidget * )0L );
  83
  84   tipTimer = new QTimer( this );
  85   connect( tipTimer, SIGNAL( timeout() ), SLOT( updateSizeTip() ) );
  86
  87   QTimer::singleShot( delay, this, SLOT( initGrabber() ) );
  88 }
  89
  90 RegionGrabber::~RegionGrabber()
  91 {
  92   delete sizeTip;
  93 }
  94
  95 void RegionGrabber::initGrabber()
  96 {
  97   pixmap = QPixmap::grabWindow( qt_xrootwin() );
  98   setPaletteBackgroundPixmap( pixmap );
  99
 100   QDesktopWidget desktopWidget;
 101   QRect desktopSize;
 102   if ( desktopWidget.isVirtualDesktop() )
 103     desktopSize = desktopWidget.geometry();
 104   else
 105     desktopSize = desktopWidget.screenGeometry( qt_xrootwin() );
 106
 107   setGeometry( desktopSize );
 108   showFullScreen();
 109
 110   QApplication::setOverrideCursor( crossCursor );
 111 }
 112
 113 void RegionGrabber::mousePressEvent( QMouseEvent *e )
 114 {
 115   if ( e->button() == LeftButton )
 116   {
 117     mouseDown = true;
 118     grabRect = QRect( e->pos(), e->pos() );
 119         drawRubber();
 120   }
 121 }
 122
 123 void RegionGrabber::mouseMoveEvent( QMouseEvent *e )
 124 {
 125   if ( mouseDown )
 126   {
 127     sizeTip->hide();
 128     tipTimer->start( 250, true );
 129
 130     drawRubber();
 131     grabRect.setBottomRight( e->pos() );
 132     drawRubber();
 133   }
 134 }
 135
 136 void RegionGrabber::mouseReleaseEvent( QMouseEvent *e )
 137 {
 138   mouseDown = false;
 139   drawRubber();
 140   sizeTip->hide();
 141
 142   grabRect.setBottomRight( e->pos() );
 143   grabRect = grabRect.normalize();
 144
 145   QPixmap region = QPixmap::grabWindow( winId(), grabRect.x(), grabRect.y(),
 146       grabRect.width(), grabRect.height() );
 147
 148   QApplication::restoreOverrideCursor();
 149
 150   emit regionGrabbed( region );
 151 }
 152
 153 void RegionGrabber::keyPressEvent( QKeyEvent *e )
 154 {
 155   if ( e->key() == Key_Escape )
 156   {
 157     QApplication::restoreOverrideCursor();
 158     emit regionGrabbed( QPixmap() );
 159   }
 160   else
 161     e->ignore();
 162 }
 163
 164 void RegionGrabber::updateSizeTip()
 165 {
 166   QRect rect = grabRect.normalize();
 167
 168   sizeTip->setTip( rect );
 169   sizeTip->show();
 170 }
 171
 172 void RegionGrabber::drawRubber()
 173 {
 174   QPainter p;
 175   p.begin( this );
 176   p.setRasterOp( NotROP );
 177   p.setPen( QPen( color0, 1 ) );
 178   p.setBrush( NoBrush );
 179
 180   style().drawPrimitive( QStyle::PE_FocusRect, &p, grabRect, colorGroup(),
 181       QStyle::Style_Default, QStyleOption( colorGroup().base() ) );
 182
 183   p.end();
 184 }
 185
 186 #include "regiongrabber.moc"