From 671d96383b2668ef773a49ba943328ddf0c98420 Mon Sep 17 00:00:00 2001
From: Tannin <devnull@localhost>
Date: Wed, 25 Feb 2015 17:48:37 +0100
Subject: icon delegates now use a pixmap cache to improve rendering
 performance

---
 src/icondelegate.cpp | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'src/icondelegate.cpp')

diff --git a/src/icondelegate.cpp b/src/icondelegate.cpp
index 8c2fe5cc..794ac7f3 100644
--- a/src/icondelegate.cpp
+++ b/src/icondelegate.cpp
@@ -22,6 +22,7 @@ along with Mod Organizer.  If not, see <http://www.gnu.org/licenses/>.
 #include <QLabel>
 #include <QPainter>
 #include <QDebug>
+#include <QPixmapCache>
 
 
 IconDelegate::IconDelegate(QObject *parent)
@@ -34,7 +35,7 @@ void IconDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
 {
   QStyledItemDelegate::paint(painter, option, index);
 
-  QList<QIcon> icons = getIcons(index);
+  QList<QString> icons = getIcons(index);
 
   int x = 4;
   painter->save();
@@ -43,8 +44,14 @@ void IconDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
   iconWidth = std::min(16, iconWidth);
 
   painter->translate(option.rect.topLeft());
-  for (auto iter = icons.begin(); iter != icons.end(); ++iter) {
-    painter->drawPixmap(x, 2, iconWidth, iconWidth, iter->pixmap(QSize(iconWidth, iconWidth)));
+  for (const QString &iconId : icons) {
+    QPixmap icon;
+    QString fullIconId = QString("%1_%2").arg(iconId).arg(iconWidth);
+    if (!QPixmapCache::find(fullIconId, &icon)) {
+      icon = QIcon(iconId).pixmap(iconWidth, iconWidth);
+      QPixmapCache::insert(fullIconId, icon);
+    }
+    painter->drawPixmap(x, 2, iconWidth, iconWidth, icon);
     x += iconWidth + 4;
   }
 
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