From eaa84772fccb480664d1a6fd8f57b99c77e6e708 Mon Sep 17 00:00:00 2001
From: Damien <Damien.Grauser@pev-geneve.ch>
Date: Sun, 2 Dec 2012 23:05:35 +0100
Subject: [PATCH] Add shaded power zones for watt per kilogram series in
 histogram

---
 src/PowerHist.cpp |  4 ++--
 src/PowerHist.h   | 30 ++++++++++++++++++++++++------
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/src/PowerHist.cpp b/src/PowerHist.cpp
index dcf1e62e8a..a4fb18453a 100644
--- a/src/PowerHist.cpp
+++ b/src/PowerHist.cpp
@@ -211,7 +211,7 @@ PowerHist::refreshZoneLabels()
 
     if (!rideItem) return;
 
-    if (series == RideFile::watts) {
+    if (series == RideFile::watts || series == RideFile::wattsKg) {
         const Zones *zones = rideItem->zones;
         int zone_range = rideItem->zoneRange();
 
@@ -964,7 +964,7 @@ PowerHist::setSeries(RideFile::SeriesType x) {
 
 bool PowerHist::shadeZones() const
 {
-    return (rideItem && rideItem->ride() && series == RideFile::watts && !zoned && shade == true);
+    return (rideItem && rideItem->ride() && (series == RideFile::watts || series == RideFile::wattsKg) && !zoned && shade == true);
 }
 
 bool PowerHist::shadeHRZones() const
diff --git a/src/PowerHist.h b/src/PowerHist.h
index 170e04bf03..7d83e50be4 100644
--- a/src/PowerHist.h
+++ b/src/PowerHist.h
@@ -262,9 +262,21 @@ class PowerHistBackground: public QwtPlotItem
 					 shading_color.saturation() / 4,
 					 shading_color.value()
 					 );
-		    r.setLeft(xMap.transform(zone_lows[z]));
-		    if (z + 1 < num_zones)
-			r.setRight(xMap.transform(zone_lows[z + 1]));
+
+            double wattsLeft = zone_lows[z];
+            if (parent->series == RideFile::wattsKg) {
+                wattsLeft = wattsLeft / rideItem->ride()->getWeight();
+            }
+            r.setLeft(xMap.transform(wattsLeft));
+
+            if (z + 1 < num_zones)  {
+                double wattsRight = zone_lows[z + 1];
+                if (parent->series == RideFile::wattsKg) {
+                    wattsRight = wattsRight / rideItem->ride()->getWeight();
+                }
+                r.setRight(xMap.transform(wattsRight));
+            }
+
 		    if (r.right() >= r.left())
 			painter->fillRect(r, shading_color);
 		}
@@ -316,7 +328,7 @@ class PowerHistZoneLabel: public QwtPlotItem
 		      (1.5 * zone_lows[zone_number] - 0.5 * zone_lows[zone_number - 1]) :
 		      2.0 * zone_lows[zone_number]
 		      )
-		     );
+             );
 
 		text = QwtText(zone_names[zone_number]);
 		text.setFont(QFont("Helvetica",24, QFont::Bold));
@@ -337,8 +349,14 @@ class PowerHistZoneLabel: public QwtPlotItem
 	      const QwtScaleMap &xMap, const QwtScaleMap &,
               const QRectF &rect) const
     {
-	if (parent->shadeZones()) {
-	    int x = xMap.transform(watts);
+        RideItem *rideItem = parent->rideItem;
+
+    if (parent->shadeZones()) {
+        double position = watts;
+        if (parent->series == RideFile::wattsKg) {
+            position = watts / rideItem->ride()->getWeight();
+        }
+        int x = xMap.transform(position);
 	    int y = (rect.bottom() + rect.top()) / 2;
 
 	    // the following code based on source for QwtPlotMarker::draw()