add fading to track charts

src/libtomahawk/playlist/PlaylistChartItemDelegate.cpp

@@ -27,6 +27,7 @@
 #include "source.h"
 #include "sourcelist.h"
 
+#include "playlistview.h"
 #include "trackmodel.h"
 #include "trackmodelitem.h"
 #include "trackproxymodel.h"
@@ -35,6 +36,8 @@
 
 #include "utils/tomahawkutilsgui.h"
 #include "utils/logger.h"
+#include <utils/PixmapDelegateFader.h>
+#include <utils/closure.h>
 
 using namespace Tomahawk;
 
@@ -55,6 +58,11 @@ PlaylistChartItemDelegate::PlaylistChartItemDelegate( TrackView* parent, TrackPr
 
     m_bottomOption = QTextOption( Qt::AlignBottom );
     m_bottomOption.setWrapMode( QTextOption::NoWrap );
+
+    connect( m_model->sourceModel(), SIGNAL( modelReset() ), this, SLOT( modelChanged() ) );
+    if ( PlaylistView* plView = qobject_cast< PlaylistView* >( parent ) )
+        connect( plView, SIGNAL( modelChanged() ), this, SLOT( modelChanged() ) );
+
 }
 
 
@@ -127,7 +135,7 @@ PlaylistChartItemDelegate::paint( QPainter* painter, const QStyleOptionViewItem&
     if ( m_view->header()->visualIndex( index.column() ) > 0 )
         return;
 
-    QPixmap pixmap, avatar;
+    QPixmap avatar;
     QString artist, track, upperText, lowerText;
     unsigned int duration = 0;
 
@@ -204,11 +212,15 @@ PlaylistChartItemDelegate::paint( QPainter* painter, const QStyleOptionViewItem&
         painter->setPen( opt.palette.text().color() );
 
         QRect pixmapRect = r.adjusted( figureRect.width() + 6, 0, -option.rect.width() + figureRect.width() + option.rect.height() - 6 + r.left(), 0 );
-        pixmap = item->query()->cover( pixmapRect.size(), false );
-        if ( !pixmap )
+
+        if ( !m_pixmaps.contains( index ) )
         {
-            pixmap = TomahawkUtils::defaultPixmap( TomahawkUtils::DefaultTrackImage, TomahawkUtils::ScaledCover, pixmapRect.size() );
+            m_pixmaps.insert( index, QSharedPointer< Tomahawk::PixmapDelegateFader >( new Tomahawk::PixmapDelegateFader( item->query(), pixmapRect.size(), false ) ) );
+            _detail::Closure* closure = NewClosure( m_pixmaps[ index ], SIGNAL( repaintRequest() ), const_cast<PlaylistChartItemDelegate*>(this), SLOT( doUpdateIndex( const QPersistentModelIndex& ) ), QPersistentModelIndex( index ) );
+            closure->setAutoDelete( false );
         }
+
+        const QPixmap pixmap = m_pixmaps[ index ]->currentPixmap();
         painter->drawPixmap( pixmapRect, pixmap );
 
         r.adjust( pixmapRect.width() + figureRect.width() + 18, 1, -28, 0 );
@@ -232,3 +244,18 @@ PlaylistChartItemDelegate::paint( QPainter* painter, const QStyleOptionViewItem&
     }
     painter->restore();
 }
+
+
+void
+PlaylistChartItemDelegate::doUpdateIndex( const QPersistentModelIndex& idx )
+{
+    emit updateRequest( idx );
+}
+
+
+void
+PlaylistChartItemDelegate::modelChanged()
+{
+    m_pixmaps.clear();
+}
+

src/libtomahawk/playlist/PlaylistChartItemDelegate.h

@@ -24,6 +24,10 @@
 
 #include "dllmacro.h"
 
+namespace Tomahawk {
+class PixmapDelegateFader;
+}
+
 class TrackModel;
 class TrackModelItem;
 class TrackProxyModel;
@@ -36,11 +40,18 @@ Q_OBJECT
 public:
     PlaylistChartItemDelegate( TrackView* parent = 0, TrackProxyModel* proxy = 0 );
 
+signals:
+    void updateRequest( const QModelIndex& idx );
+
 protected:
     void paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const;
     QSize sizeHint( const QStyleOptionViewItem& option, const QModelIndex& index ) const;
     QWidget* createEditor( QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index ) const;
 
+private slots:
+    void modelChanged();
+    void doUpdateIndex( const QPersistentModelIndex& idx );
+
 private:
     void prepareStyleOption( QStyleOptionViewItemV4* option, const QModelIndex& index, TrackModelItem* item ) const;
 
@@ -51,6 +62,8 @@ private:
 
     TrackView* m_view;
     TrackProxyModel* m_model;
+
+    mutable QHash< QPersistentModelIndex, QSharedPointer< Tomahawk::PixmapDelegateFader > > m_pixmaps;
 };
 
 #endif // PLAYLISTCHARTITEMDELEGATE_H

src/libtomahawk/playlist/playlistview.h

@@ -56,6 +56,7 @@ public:
 signals:
     void nameChanged( const QString& title );
     void destroyed( QWidget* widget );
+    void modelChanged();
 
 protected:
     void keyPressEvent( QKeyEvent* event );

src/libtomahawk/query.cpp

@@ -674,7 +674,9 @@ Query::cover( const QSize& size, bool forceLoad ) const
         m_artistPtr = Artist::get( artist(), false );
         m_albumPtr = Album::get( m_artistPtr, album(), false );
         connect( m_artistPtr.data(), SIGNAL( updated() ), SIGNAL( updated() ), Qt::UniqueConnection );
+        connect( m_artistPtr.data(), SIGNAL( coverChanged() ), SIGNAL( coverChanged() ), Qt::UniqueConnection );
         connect( m_albumPtr.data(), SIGNAL( updated() ), SIGNAL( updated() ), Qt::UniqueConnection );
+        connect( m_albumPtr.data(), SIGNAL( coverChanged() ), SIGNAL( coverChanged() ), Qt::UniqueConnection );
     }
 
     m_albumPtr->cover( size, forceLoad );

src/libtomahawk/query.h

@@ -139,6 +139,8 @@ signals:
     void playableStateChanged( bool state );
     void resolvingFinished( bool hasResults );
 
+    void coverChanged();
+
     // emitted when social actions are loaded
     void socialActionsLoaded();
     void updated();

src/libtomahawk/widgets/whatshotwidget.cpp

@@ -83,7 +83,9 @@ WhatsHotWidget::WhatsHotWidget( QWidget* parent )
     ui->tracksViewLeft->overlay()->setEnabled( false );
     ui->tracksViewLeft->setHeaderHidden( true );
     ui->tracksViewLeft->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
-    ui->tracksViewLeft->setItemDelegate( new PlaylistChartItemDelegate( ui->tracksViewLeft, ui->tracksViewLeft->proxyModel() ) );
+    PlaylistChartItemDelegate* del = new PlaylistChartItemDelegate( ui->tracksViewLeft, ui->tracksViewLeft->proxyModel() );
+    connect( del, SIGNAL( updateRequest( QModelIndex ) ), ui->tracksViewLeft, SLOT( update( QModelIndex ) ) );
+    ui->tracksViewLeft->setItemDelegate( del );
     ui->tracksViewLeft->setUniformRowHeights( false );
 
     TreeProxyModel* artistsProxy = new TreeProxyModel( ui->artistsViewLeft );