Big improvement in speed ( callgrind )

This patch makes use of a cache variable instead of creating / accessing a
new one via operator[], because for some reason QGraphicsPolygonItem
doesn't return a reference for polygon and a copy is always made.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/qt-ui/profile/diveprofileitem.cpp b/qt-ui/profile/diveprofileitem.cpp
index e7cf7cf03..9aa204808 100644
--- a/qt-ui/profile/diveprofileitem.cpp
+++ b/qt-ui/profile/diveprofileitem.cpp
@@ -113,12 +113,13 @@ void DiveProfileItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* o
 	QPen pen;
 	pen.setCosmetic(true);
 	pen.setWidth(2);
+	QPolygonF poly = polygon();
 	// This paints the colors of the velocities.
 	for (int i = 1, count = dataModel->rowCount(); i < count; i++) {
 		QModelIndex colorIndex = dataModel->index(i, DivePlotDataModel::COLOR);
 		pen.setBrush(QBrush(colorIndex.data(Qt::BackgroundRole).value<QColor>()));
 		painter->setPen(pen);
-		painter->drawLine(polygon()[i-1],polygon()[i]);
+		painter->drawLine(poly[i-1],poly[i]);
 	}
 }