QtCollider/widgets/QcSlider.cpp

   1 /************************************************************************
   2 *
   3 * Copyright 2010 Jakob Leben (jakob.leben@gmail.com)
   4 *
   5 * This file is part of SuperCollider Qt GUI.
   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 3 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
  22 #include "QcSlider.h"
  23 #include "../QcWidgetFactory.h"
  24
  25 #include <QApplication>
  26
  27 static QcWidgetFactory<QcSlider> factory;
  28
  29 QcSlider::QcSlider()
  30 : lastVal(0), bDoAction( false )
  31 {
  32   setRange(0, 10000);
  33   setStep( 0.01 );
  34   lastVal = sliderPosition();
  35
  36   connect( this, SIGNAL(actionTriggered( int )),
  37            this, SLOT(action( int )));
  38 }
  39
  40 void  QcSlider::increment( double factor )
  41 {
  42   QSlider::setValue( QSlider::singleStep() * factor + QSlider::value() );
  43 }
  44
  45 void  QcSlider::decrement( double factor )
  46 {
  47   QSlider::setValue( QSlider::singleStep() * (-factor) + QSlider::value() );
  48 }
  49
  50 void QcSlider::action( int act )
  51 {
  52   if( sliderPosition() != lastVal )
  53   {
  54       if( act < 5 ) {
  55         float step = singleStep();
  56         bool modified = modifyStep( &step );
  57
  58         if( modified ) {
  59           if( act == QAbstractSlider::SliderSingleStepAdd ||
  60               act == QAbstractSlider::SliderPageStepAdd )
  61             setSliderPosition( lastVal + step );
  62           else
  63             setSliderPosition( lastVal - step );
  64         }
  65       }
  66       lastVal = sliderPosition();
  67       Q_EMIT( action() );
  68   }
  69 }
  70
  71 void QcSlider::setStep( float fStep )
  72 {
  73   int iStep = fStep * 10000;
  74   setSingleStep( iStep );
  75   setPageStep( iStep );
  76 }