Make artist names in album cover view clickable

src/libtomahawk/playlist/albumitemdelegate.cpp

@@ -31,6 +31,8 @@
 
 #include "playlist/albumitem.h"
 #include "playlist/albumproxymodel.h"
+#include <QMouseEvent>
+#include <viewmanager.h>
 
 
 AlbumItemDelegate::AlbumItemDelegate( QAbstractItemView* parent, AlbumProxyModel* proxy )
@@ -152,11 +154,75 @@ AlbumItemDelegate::paint( QPainter* painter, const QStyleOptionViewItem& option,
         text = painter->fontMetrics().elidedText( item->album()->name(), Qt::ElideRight, textRect.width() - 3 );
         painter->drawText( textRect, text, to );
 
+        // If the user is hovering over an artist rect, draw a background so she knows it's clickable
+        QRect r = textRect;
+        r.setTop( r.bottom() - painter->fontMetrics().height() );
+        if ( m_hoveringOver == index )
+            TomahawkUtils::drawQueryBackground( painter, opt.palette, r, 1.5 );
+
         painter->setPen( opt.palette.color( QPalette::Dark ) );
         to.setAlignment( Qt::AlignHCenter | Qt::AlignBottom );
         text = painter->fontMetrics().elidedText( item->album()->artist()->name(), Qt::ElideRight, textRect.width() - 3 );
         painter->drawText( textRect, text, to );
+        // Calculate rect of artist on-hover button click area
+
+        m_artistNameRects[ index ] = r;
     }
 
     painter->restore();
 }
+
+bool
+AlbumItemDelegate::editorEvent( QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index )
+{
+    Q_UNUSED( option );
+
+    if ( event->type() != QEvent::MouseButtonRelease &&
+         event->type() != QEvent::MouseMove &&
+         event->type() != QEvent::MouseButtonPress )
+        return false;
+
+    if ( m_artistNameRects.contains( index ) )
+    {
+        QMouseEvent* ev = static_cast< QMouseEvent* >( event );
+        QRect artistNameRect = m_artistNameRects[ index ];
+        if ( artistNameRect.contains( ev->pos() ) )
+        {
+            if ( event->type() == QEvent::MouseMove )
+            {
+                if ( m_hoveringOver != index )
+                {
+                    QModelIndex old = m_hoveringOver;
+                    m_hoveringOver = index;
+                    emit updateIndex( old );
+                    emit updateIndex( index );
+                }
+
+                return true;
+            }
+            else if ( event->type() == QEvent::MouseButtonRelease )
+            {
+                AlbumItem* item = m_model->sourceModel()->itemFromIndex( m_model->mapToSource( index ) );
+                if ( !item || item->album().isNull() || item->album()->artist().isNull() )
+                    return false;
+
+                ViewManager::instance()->show( item->album()->artist() );
+
+                return true;
+            } else if ( event->type() == QEvent::MouseButtonPress )
+            {
+                // Stop the whole album from having a down click action as we just want the artist name to be clicked
+                return true;
+            }
+        }
+    }
+
+    if ( m_hoveringOver.isValid() )
+    {
+        QModelIndex old = m_hoveringOver;
+        m_hoveringOver = QPersistentModelIndex();
+        emit updateIndex( old );
+    }
+
+    return false;
+}

src/libtomahawk/playlist/albumitemdelegate.h

@@ -23,6 +23,7 @@
 
 #include "dllmacro.h"
 
+class QEvent;
 class AlbumProxyModel;
 
 class DLLEXPORT AlbumItemDelegate : public QStyledItemDelegate
@@ -36,13 +37,20 @@ protected:
     void paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const;
     QSize sizeHint( const QStyleOptionViewItem& option, const QModelIndex& index ) const;
 
+    bool editorEvent( QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index );
 //    QWidget* createEditor( QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index ) const;
 
+signals:
+    void updateIndex( const QModelIndex& idx );
+
 private:
     QAbstractItemView* m_view;
     AlbumProxyModel* m_model;
 
     mutable QHash< qint64, QPixmap > m_cache;
+    mutable QHash< QPersistentModelIndex, QRect > m_artistNameRects;
+    QPersistentModelIndex m_hoveringOver;
+
     QPixmap m_shadowPixmap;
     QPixmap m_defaultCover;
 };

src/libtomahawk/playlist/albumview.cpp

@@ -50,6 +50,7 @@ AlbumView::AlbumView( QWidget* parent )
     setUniformItemSizes( true );
     setSpacing( 16 );
     setContentsMargins( 0, 0, 0, 0 );
+    setMouseTracking( true );
 
     setResizeMode( Adjust );
     setViewMode( IconMode );
@@ -77,7 +78,9 @@ void
 AlbumView::setProxyModel( AlbumProxyModel* model )
 {
     m_proxyModel = model;
-    setItemDelegate( new AlbumItemDelegate( this, m_proxyModel ) );
+    AlbumItemDelegate* del = new AlbumItemDelegate( this, m_proxyModel );
+    connect( del, SIGNAL( updateIndex( QModelIndex ) ), this, SLOT( update( QModelIndex ) ) );
+    setItemDelegate( del );
 
     QListView::setModel( m_proxyModel );
 }

src/libtomahawk/utils/tomahawkutils.cpp

@@ -434,6 +434,14 @@ drawBackgroundAndNumbers( QPainter* painter, const QString& text, const QRect& f
     painter->drawText( figRect.adjusted( -5, 0, 6, 0 ), text, to );
 }
 
+void
+drawQueryBackground( QPainter* p, const QPalette& palette, const QRect& r, qreal lightnessFactor )
+{
+    p->setPen( palette.mid().color().lighter( lightnessFactor * 100 ) );
+    p->setBrush( palette.highlight().color().lighter( lightnessFactor * 100 ) );
+    p->drawRoundedRect( r, 4.0, 4.0 );
+}
+
 
 void
 unmarginLayout( QLayout* layout )

src/libtomahawk/utils/tomahawkutils.h

@@ -26,6 +26,7 @@
 #include <QtNetwork/QNetworkProxy>
 #include <QtCore/QStringList>
 #include <QtCore/QRect>
+#include <QPalette>
 
 #define RESPATH ":/data/"
 
@@ -85,6 +86,7 @@ namespace TomahawkUtils
     DLLEXPORT QPixmap createDragPixmap( MediaType type, int itemCount = 1 );
 
     DLLEXPORT void drawBackgroundAndNumbers( QPainter* p, const QString& text, const QRect& rect );
+    DLLEXPORT void drawQueryBackground( QPainter* p, const QPalette& palette, const QRect& r, qreal lightnessFactor = 1 );
 
     DLLEXPORT void unmarginLayout( QLayout* layout );
 

src/libtomahawk/widgets/querylabel.cpp

@@ -367,9 +367,7 @@ QueryLabel::paintEvent( QPaintEvent* event )
             m_hoverType = Track;
         }
 
-        p.setPen( palette().mid().color() );
-        p.setBrush( palette().highlight() );
-        p.drawRoundedRect( m_hoverArea, 4.0, 4.0 );
+        TomahawkUtils::drawQueryBackground( &p, palette(), m_hoverArea );
     }
 
     if ( elidedText != s || ( m_result.isNull() && m_query.isNull() ) )