From a74fa37950477b51d8352bdb1c6273a91b348aac Mon Sep 17 00:00:00 2001
From: rnv <rnv@opencascade.com>
Date: Tue, 24 Apr 2012 13:55:03 +0000
Subject: [PATCH] Fix for the bug IPAL22911 TC6.5.0: Problem with the curve
 normalization .

---
 src/Plot2d/Plot2d.cxx           |  4 ++++
 src/Plot2d/Plot2d_Curve.cxx     | 10 ++++------
 src/Plot2d/Plot2d_PlotItems.cxx |  4 ++--
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/Plot2d/Plot2d.cxx b/src/Plot2d/Plot2d.cxx
index 57b6c178c..4737c228b 100755
--- a/src/Plot2d/Plot2d.cxx
+++ b/src/Plot2d/Plot2d.cxx
@@ -102,6 +102,8 @@ bool Plot2d_Point::minDeviation(double& min) const {
   if(hasDeviation()) {
     min = deviationPtr[0];
     return true;
+  } else {
+    min = 0;
   }
   return false;
 }
@@ -113,6 +115,8 @@ bool Plot2d_Point::maxDeviation(double& max) const {
   if(hasDeviation()) {
     max = deviationPtr[1];
     return true;
+  } else {
+    max = 0;
   }
   return false;
 }
diff --git a/src/Plot2d/Plot2d_Curve.cxx b/src/Plot2d/Plot2d_Curve.cxx
index be7caa90d..0aae4b04e 100755
--- a/src/Plot2d/Plot2d_Curve.cxx
+++ b/src/Plot2d/Plot2d_Curve.cxx
@@ -339,9 +339,8 @@ double Plot2d_Curve::getMinY() const
   pointList::const_iterator aIt;
   double coeff = 0.0;
   for (aIt = myPoints.begin(); aIt != myPoints.end(); ++aIt) {    
-    aMinY = qMin( aMinY, myScale * (*aIt).y );
-    if((*aIt).minDeviation(coeff))
-      aMinY = qMin( aMinY, coeff );
+   (*aIt).minDeviation(coeff);
+    aMinY = qMin( aMinY, myScale * (*aIt).y - coeff);
   }
   return aMinY;
 }
@@ -355,9 +354,8 @@ double Plot2d_Curve::getMaxY() const
   pointList::const_iterator aIt;
   double coeff = 0.0;
   for (aIt = myPoints.begin(); aIt != myPoints.end(); ++aIt) {
-    aMaxY = qMax( aMaxY, myScale * (*aIt).y);
-    if((*aIt).maxDeviation(coeff))
-      aMaxY = qMax( aMaxY, coeff);
+    (*aIt).maxDeviation(coeff);
+    aMaxY = qMax( aMaxY, myScale * (*aIt).y + coeff);
   }
   return aMaxY;
 }
diff --git a/src/Plot2d/Plot2d_PlotItems.cxx b/src/Plot2d/Plot2d_PlotItems.cxx
index 24871dc8d..95a2d2def 100644
--- a/src/Plot2d/Plot2d_PlotItems.cxx
+++ b/src/Plot2d/Plot2d_PlotItems.cxx
@@ -324,8 +324,8 @@ void Plot2d_QwtPlotCurve::draw(QPainter *painter,
       xi = x(i);
       yi = y(i);
       xp = xMap.transform(xi);
-      ytop = yMap.transform(max);
-      ybtm = yMap.transform(min);
+      ytop = yMap.transform(yi + max);
+      ybtm = yMap.transform(yi - min);
       tickl = xp - tickSz;
       tickr = xp + tickSz;
       painter->drawLine(tickl,ytop,tickr,ytop);
-- 
2.39.2