Qt: add drow shadow effect

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/components/playlist/icon_view.cpp

@@ -36,6 +36,7 @@
 #define ART_SIZE            64
 #define OFFSET              (100-64)/2
 #define ITEMS_SPACING       10
+#define ART_RADIUS          7
 
 void PlListViewItemDelegate::paint( QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index ) const
 {
@@ -62,8 +63,16 @@ void PlListViewItemDelegate::paint( QPainter * painter, const QStyleOptionViewIt
 
     QRect artRect = option.rect.adjusted( OFFSET - 1, 0, - OFFSET, - OFFSET *2 );
     QPainterPath artRectPath;
-    artRectPath.addRoundedRect( artRect, 7, 7 );
+    artRectPath.addRoundedRect( artRect, ART_RADIUS, ART_RADIUS );
 
+    // Draw the drop shadow
+    painter->save();
+    painter->setOpacity( 0.7 );
+    painter->setBrush( QBrush( Qt::gray ) );
+    painter->drawRoundedRect( artRect.adjusted( 2, 2, 2, 2 ), ART_RADIUS, ART_RADIUS );
+    painter->restore();
+
+    // Draw the art pixmap
     painter->drawPixmap( artRect, pix );
     painter->setClipPath( artRectPath );
     painter->drawPixmap( artRect, pix );