Initial work on the sleeker slider

src/audiocontrols.cpp

@@ -90,11 +90,16 @@ AudioControls::AudioControls( QWidget* parent )
 
     ui->ownerLabel->setForegroundRole( QPalette::Dark );
     ui->metaDataArea->setStyleSheet( "QWidget#metaDataArea {\nborder-width: 4px;\nborder-image: url(" RESPATH "images/now-playing-panel.png) 4 4 4 4 stretch stretch; }" );
-
+    
     ui->seekSlider->setEnabled( true );
     ui->volumeSlider->setRange( 0, 100 );
     ui->volumeSlider->setValue( AudioEngine::instance()->volume() );
 
+    m_sliderTimeLine.setCurveShape( QTimeLine::LinearCurve );
+    ui->seekSlider->setTimeLine( &m_sliderTimeLine );
+
+    connect( &m_sliderTimeLine,    SIGNAL( frameChanged( int ) ), ui->seekSlider, SLOT( setValue( int ) ) );
+    
     connect( ui->seekSlider,       SIGNAL( valueChanged( int ) ), AudioEngine::instance(), SLOT( seek( int ) ) );
     connect( ui->volumeSlider,     SIGNAL( valueChanged( int ) ), AudioEngine::instance(), SLOT( setVolume( int ) ) );
     connect( ui->prevButton,       SIGNAL( clicked() ), AudioEngine::instance(), SLOT( previous() ) );
@@ -179,7 +184,7 @@ AudioControls::onVolumeChanged( int volume )
 void
 AudioControls::onPlaybackStarted( const Tomahawk::result_ptr& result )
 {
-    tDebug( LOGEXTRA ) << Q_FUNC_INFO;
+    tDebug() << Q_FUNC_INFO;
 
     onPlaybackLoading( result );
 
@@ -242,7 +247,7 @@ AudioControls::infoSystemFinished( QString target )
 void
 AudioControls::onPlaybackLoading( const Tomahawk::result_ptr& result )
 {
-    tDebug( LOGEXTRA ) << Q_FUNC_INFO;
+    tDebug() << Q_FUNC_INFO;
 
     m_currentTrack = result;
 
@@ -254,8 +259,16 @@ AudioControls::onPlaybackLoading( const Tomahawk::result_ptr& result )
     ui->timeLabel->setText( TomahawkUtils::timeToString( 0 ) );
     ui->timeLeftLabel->setText( "-" + TomahawkUtils::timeToString( result->duration() ) );
 
-    ui->seekSlider->setRange( 0, m_currentTrack->duration() * 1000 );
+    ui->seekSlider->setRange( 0, result->duration() * 1000 );
     ui->seekSlider->setValue( 0 );
+
+    tLog() << Q_FUNC_INFO << " setting sliderTimeLine duration to  " << (result->duration() * 1000);
+    tLog() << Q_FUNC_INFO << " setting sliderTimeLine frames to  " << (result->duration() * 1000);
+    
+    m_sliderTimeLine.setDuration( result->duration() * 1000 );
+    m_sliderTimeLine.setFrameRange( 0, result->duration() * 1000 );
+    m_sliderTimeLine.setCurrentTime( 0 );
+
     ui->seekSlider->setVisible( true );
 
     ui->stackedLayout->setCurrentWidget( ui->pauseButton );
@@ -293,20 +306,26 @@ AudioControls::socialActionsLoaded()
 void
 AudioControls::onPlaybackPaused()
 {
+    tDebug() << Q_FUNC_INFO;
     ui->stackedLayout->setCurrentWidget( ui->playPauseButton );
+    m_sliderTimeLine.setPaused( true );
 }
 
 void
 AudioControls::onPlaybackResumed()
 {
+    tDebug() << Q_FUNC_INFO;
     ui->stackedLayout->setCurrentWidget( ui->pauseButton );
     ui->loveButton->setVisible( true );
+    ui->seekSlider->setNeedsUpdate( true );
+    m_sliderTimeLine.resume();
 }
 
 
 void
 AudioControls::onPlaybackStopped()
 {
+    tDebug() << Q_FUNC_INFO;
     m_currentTrack.clear();
 
     ui->artistTrackLabel->setText( "" );
@@ -316,6 +335,8 @@ AudioControls::onPlaybackStopped()
     ui->timeLeftLabel->setText( "" );
     ui->coverImage->setPixmap( QPixmap() );
     ui->seekSlider->setVisible( false );
+    m_sliderTimeLine.stop();
+    m_sliderTimeLine.setCurrentTime( 0 );
 
     ui->stackedLayout->setCurrentWidget( ui->playPauseButton );
     ui->loveButton->setEnabled( false );
@@ -326,6 +347,7 @@ AudioControls::onPlaybackStopped()
 void
 AudioControls::onPlaybackTimer( qint64 msElapsed )
 {
+    tDebug() << Q_FUNC_INFO;
     if ( m_currentTrack.isNull() )
         return;
 
@@ -334,7 +356,15 @@ AudioControls::onPlaybackTimer( qint64 msElapsed )
     const int seconds = msElapsed / 1000;
     ui->timeLabel->setText( TomahawkUtils::timeToString( seconds ) );
     ui->timeLeftLabel->setText( "-" + TomahawkUtils::timeToString( m_currentTrack->duration() - seconds ) );
-    ui->seekSlider->setValue( msElapsed );
+    tLog() << Q_FUNC_INFO << " setting sliderTimeLine elapsed time to " << msElapsed;
+    
+    if ( ui->seekSlider->needsUpdate() )
+    {
+        m_sliderTimeLine.setCurrentTime( msElapsed );
+        ui->seekSlider->setNeedsUpdate( false );
+    }
+    else if ( m_sliderTimeLine.state() == QTimeLine::NotRunning )
+        m_sliderTimeLine.start();
 
     ui->seekSlider->blockSignals( false );
 }

src/audiocontrols.h

@@ -20,6 +20,7 @@
 #define AUDIOCONTROLS_H
 
 #include <QWidget>
+#include <QTimeLine>
 
 #include "result.h"
 #include "playlistinterface.h"
@@ -79,6 +80,7 @@ private slots:
     void droppedTracks( QList<Tomahawk::query_ptr> );
 
     void socialActionsLoaded();
+
 private:
     Ui::AudioControls *ui;
 
@@ -87,6 +89,8 @@ private:
     Tomahawk::result_ptr m_currentTrack;
     Tomahawk::PlaylistInterface::RepeatMode m_repeatMode;
     bool m_shuffled;
+
+    QTimeLine m_sliderTimeLine;
 };
 
 #endif // AUDIOCONTROLS_H

src/libtomahawk/widgets/SeekSlider.cpp

@@ -19,6 +19,7 @@
 #include "SeekSlider.h"
 
 #include <QMouseEvent>
+#include <QTimeLine>
 
 #include "utils/tomahawkutils.h"
 #include "utils/logger.h"
@@ -26,6 +27,8 @@
 
 SeekSlider::SeekSlider( QWidget* parent )
     : QSlider( parent )
+    , m_timeLine( 0 )
+    , m_needsUpdate( false )
 {
     setFixedHeight( 20 );
     setStyleSheet( "QSlider::groove::horizontal {"
@@ -64,3 +67,24 @@ SeekSlider::mousePressEvent( QMouseEvent* event )
     else
         QSlider::mousePressEvent( event );
 }
+
+
+void
+SeekSlider::setValue( int value )
+{
+    int newVal = value;
+    if ( value > maximum() )
+        newVal = maximum();
+    if ( value < minimum() )
+        newVal = minimum();
+    
+    if ( !m_timeLine || sender() != m_timeLine ) 
+    {
+        QSlider::setValue( newVal );
+        return;
+    }
+
+    blockSignals( true );
+    QSlider::setValue( newVal );
+    blockSignals( false );
+}

src/libtomahawk/widgets/SeekSlider.h

@@ -23,6 +23,8 @@
 
 #include "dllmacro.h"
 
+class QTimeLine;
+
 class DLLEXPORT SeekSlider : public QSlider
 {
 Q_OBJECT
@@ -31,8 +33,20 @@ public:
     SeekSlider( QWidget* parent = 0 );
     ~SeekSlider();
 
+    void setTimeLine( QTimeLine* timeline ) { m_timeLine = timeline; }
+
+    void setNeedsUpdate( bool needsUpdate ) { m_needsUpdate = needsUpdate; }
+    bool needsUpdate() { return m_needsUpdate; }
+
+public slots:
+    void setValue( int value );
+    
 protected:
     void mousePressEvent( QMouseEvent* event );
+
+private:
+    QTimeLine* m_timeLine;
+    bool m_needsUpdate;
 };
 
 #endif // SEEKSLIDER_H