+/**********************************************************************
+ * Speed control widget
+ **********************************************************************/
+SpeedControlWidget::SpeedControlWidget( intf_thread_t *_p_i ) :
+ QFrame( NULL ), p_intf( _p_i )
+{
+ QSizePolicy sizePolicy( QSizePolicy::Maximum, QSizePolicy::Fixed );
+ sizePolicy.setHorizontalStretch( 0 );
+ sizePolicy.setVerticalStretch( 0 );
+
+ speedSlider = new QSlider;
+ speedSlider->setSizePolicy( sizePolicy );
+ speedSlider->setMaximumSize( QSize( 80, 200 ) );
+ speedSlider->setOrientation( Qt::Vertical );
+ speedSlider->setTickPosition( QSlider::TicksRight );
+
+ speedSlider->setRange( -100, 100 );
+ speedSlider->setSingleStep( 10 );
+ speedSlider->setPageStep( 20 );
+ speedSlider->setTickInterval( 20 );
+
+ CONNECT( speedSlider, valueChanged( int ), this, updateRate( int ) );
+
+ normalSpeedButton = new QPushButton( "N" );
+ normalSpeedButton->setMaximumSize( QSize( 26, 20 ) );
+ normalSpeedButton->setFlat( true );
+ normalSpeedButton->setToolTip( qtr( "Revert to normal play speed" ) );
+
+ CONNECT( normalSpeedButton, clicked(), this, resetRate() );
+
+ QVBoxLayout *speedControlLayout = new QVBoxLayout;
+ speedControlLayout->addWidget(speedSlider);
+ speedControlLayout->addWidget(normalSpeedButton);
+ setLayout(speedControlLayout);
+}
+
+SpeedControlWidget::~SpeedControlWidget()
+{
+}
+
+#define RATE_SLIDER_MAXIMUM 3.0
+#define RATE_SLIDER_MINIMUM 0.3
+#define RATE_SLIDER_LENGTH 100.0
+
+void SpeedControlWidget::updateControls( int rate )
+{
+ if( speedSlider->isSliderDown() )
+ {
+ //We don't want to change anything if the user is using the slider
+ return;
+ }
+
+ int sliderValue;
+ double speed = INPUT_RATE_DEFAULT / (double)rate;
+
+ if( rate >= INPUT_RATE_DEFAULT )
+ {
+ if( speed < RATE_SLIDER_MINIMUM )
+ {
+ sliderValue = speedSlider->minimum();
+ }
+ else
+ {
+ sliderValue = (int)( ( speed - 1.0 ) * RATE_SLIDER_LENGTH
+ / ( 1.0 - RATE_SLIDER_MAXIMUM ) );
+ }
+ }
+ else
+ {
+ if( speed > RATE_SLIDER_MAXIMUM )
+ {
+ sliderValue = speedSlider->maximum();
+ }
+ else
+ {
+ sliderValue = (int)( ( speed - 1.0 ) * RATE_SLIDER_LENGTH
+ / ( RATE_SLIDER_MAXIMUM - 1.0 ) );
+ }
+ }
+
+ //Block signals to avoid feedback loop
+ speedSlider->blockSignals( true );
+ speedSlider->setValue( sliderValue );
+ speedSlider->blockSignals( false );
+}
+
+void SpeedControlWidget::updateRate( int sliderValue )
+{
+ int rate;
+
+ if( sliderValue < 0.0 )
+ {
+ rate = INPUT_RATE_DEFAULT* RATE_SLIDER_LENGTH /
+ ( sliderValue * ( 1.0 - RATE_SLIDER_MINIMUM ) + RATE_SLIDER_LENGTH ) ;
+ }
+ else
+ {
+ rate = INPUT_RATE_DEFAULT* RATE_SLIDER_LENGTH /
+ ( sliderValue * ( RATE_SLIDER_MAXIMUM - 1.0 ) + RATE_SLIDER_LENGTH );
+ }
+
+ THEMIM->getIM()->setRate(rate);
+}
+
+void SpeedControlWidget::resetRate()
+{
+ THEMIM->getIM()->setRate(INPUT_RATE_DEFAULT);
+}