From 1a3cae012e8ceeda845c36a42d56a6e5c15c6e87 Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Mon, 25 Jul 2011 03:55:02 +0200
Subject: [PATCH] * Add a QPixmap-cache to the TreeView delegate.

---
 src/libtomahawk/playlist/treeitemdelegate.cpp | 12 +++++++++++-
 src/libtomahawk/playlist/treeitemdelegate.h   |  2 ++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/libtomahawk/playlist/treeitemdelegate.cpp b/src/libtomahawk/playlist/treeitemdelegate.cpp
index 5bd0eefcb..acbd3710a 100644
--- a/src/libtomahawk/playlist/treeitemdelegate.cpp
+++ b/src/libtomahawk/playlist/treeitemdelegate.cpp
@@ -133,8 +133,18 @@ TreeItemDelegate::paint( QPainter* painter, const QStyleOptionViewItem& option,
     QRect r = option.rect.adjusted( 4, 4, -option.rect.width() + option.rect.height() - 4, -4 );
 //    painter->drawPixmap( r, QPixmap( RESPATH "images/cover-shadow.png" ) );
 
+    QPixmap scover;
     QPixmap cover = item->cover.isNull() ? m_defaultCover : item->cover;
-    painter->drawPixmap( r, cover.scaled( r.size(), Qt::KeepAspectRatio, Qt::SmoothTransformation ) );
+    if ( m_cache.contains( cover.cacheKey() ) )
+    {
+        scover = m_cache.value( cover.cacheKey() );
+    }
+    else
+    {
+        scover = cover.scaled( r.size(), Qt::KeepAspectRatio, Qt::SmoothTransformation );
+        m_cache.insert( cover.cacheKey(), scover );
+    }
+    painter->drawPixmap( r, scover );
 
     QTextOption to;
     to.setAlignment( Qt::AlignVCenter );
diff --git a/src/libtomahawk/playlist/treeitemdelegate.h b/src/libtomahawk/playlist/treeitemdelegate.h
index d90d20a74..b636558ac 100644
--- a/src/libtomahawk/playlist/treeitemdelegate.h
+++ b/src/libtomahawk/playlist/treeitemdelegate.h
@@ -43,6 +43,8 @@ private:
     ArtistView* m_view;
     TreeProxyModel* m_model;
 
+    mutable QHash< qint64, QPixmap > m_cache;
+
     QPixmap m_nowPlayingIcon;
     QPixmap m_defaultCover;
 };