From dbecc014b7b61def6d31b044cb1de1ef1f48fc50 Mon Sep 17 00:00:00 2001
From: edouard <edouard>
Date: Tue, 13 Apr 2010 21:22:32 +0000
Subject: [PATCH] Performance update, the previous version kept reloading the
 svg files and was a bit stupid, sorry. Now only updates when the value is
 changed.

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@497 ebee16cc-31ac-478f-84a7-5cbb03baadba
---
 .../experimental/DialTest/basicsvgdial.cpp    | 42 +++++++++----------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/ground/src/experimental/DialTest/basicsvgdial.cpp b/ground/src/experimental/DialTest/basicsvgdial.cpp
index 6619e35f3..e6f49cfbb 100644
--- a/ground/src/experimental/DialTest/basicsvgdial.cpp
+++ b/ground/src/experimental/DialTest/basicsvgdial.cpp
@@ -24,27 +24,6 @@ void BasicSvgDial::setRenderer(RendererType type)
 void BasicSvgDial::paintEvent(QPaintEvent *event) {
     qDebug() << "in painEvent()";
 
-    QGraphicsScene *s = scene();
-    s->clear();
-    m_backgroundItem = new QGraphicsSvgItem(backgroundFile);
-    m_backgroundItem->setZValue(-1);
-
-    m_needleItem = new QGraphicsSvgItem(needleFile);
-    QRectF rect = m_needleItem->boundingRect();
-    m_needleItem->translate(rect.width()/2,rect.height()/2);
-    m_needleItem->rotate(angle);
-    m_needleItem->translate(-rect.width()/2,-rect.height()/2);
-    m_needleItem->setZValue(0);
-
-    m_foregroundItem = new QGraphicsSvgItem(foregroundFile);
-    m_foregroundItem->setZValue(1);
-
-    s->addItem(m_backgroundItem);
-    s->addItem(m_needleItem);
-    s->addItem(m_foregroundItem);
-
-    s->setSceneRect(m_backgroundItem->boundingRect());
-
     QGraphicsView::paintEvent(event);
 
     qDebug() << "out paintEvent()";
@@ -58,6 +37,7 @@ void BasicSvgDial::paintEvent(QPaintEvent *event) {
 void BasicSvgDial::setAngle(int i) {
     qDebug() << "BasicDial::setAngle()";
     angle = value2angle(i);
+
     update();
 }
 
@@ -79,6 +59,26 @@ qreal BasicSvgDial::value2angle(qreal value) {
 void BasicSvgDial::setValue(qreal value) {
     angle = value2angle(value);
     currentValue = value;
+    QGraphicsScene *s = scene();
+    s->clear();
+    m_backgroundItem = new QGraphicsSvgItem(backgroundFile);
+    m_backgroundItem->setZValue(-1);
+
+    m_needleItem = new QGraphicsSvgItem(needleFile);
+    QRectF rect = m_needleItem->boundingRect();
+    m_needleItem->translate(rect.width()/2,rect.height()/2);
+    m_needleItem->rotate(angle);
+    m_needleItem->translate(-rect.width()/2,-rect.height()/2);
+    m_needleItem->setZValue(0);
+
+    m_foregroundItem = new QGraphicsSvgItem(foregroundFile);
+    m_foregroundItem->setZValue(1);
+
+    s->addItem(m_backgroundItem);
+    s->addItem(m_needleItem);
+    s->addItem(m_foregroundItem);
+
+    s->setSceneRect(m_backgroundItem->boundingRect());
     update();
 }