Added heart rate graph

Improved graphs loading performance
Fixed various corner case behaviour bugs

gpxsee.pro

@@ -33,7 +33,8 @@ HEADERS += src/config.h \
     src/graphview.h \
     src/trackpoint.h \
     src/waypointitem.h \
-    src/palette.h
+    src/palette.h \
+    src/heartrategraph.h
 SOURCES += src/main.cpp \
     src/gui.cpp \
     src/gpx.cpp \
@@ -57,7 +58,8 @@ SOURCES += src/main.cpp \
     src/track.cpp \
     src/graphview.cpp \
     src/waypointitem.cpp \
-    src/palette.cpp
+    src/palette.cpp \
+    src/heartrategraph.cpp
 RESOURCES += gpxsee.qrc
 TRANSLATIONS = lang/gpxsee_cs.ts
 macx:ICON = icons/gpxsee.icns

lang/gpxsee_cs.ts

@@ -15,43 +15,43 @@
     </message>
     <message>
         <location filename="../src/elevationgraph.cpp" line="16"/>
-        <location filename="../src/elevationgraph.cpp" line="83"/>
+        <location filename="../src/elevationgraph.cpp" line="84"/>
         <source>km</source>
         <translation>km</translation>
     </message>
     <message>
         <location filename="../src/elevationgraph.cpp" line="17"/>
-        <location filename="../src/elevationgraph.cpp" line="84"/>
+        <location filename="../src/elevationgraph.cpp" line="85"/>
         <source>m</source>
         <translation>m</translation>
     </message>
     <message>
-        <location filename="../src/elevationgraph.cpp" line="23"/>
+        <location filename="../src/elevationgraph.cpp" line="24"/>
         <source>Ascent</source>
         <translation>Stoupání</translation>
     </message>
     <message>
-        <location filename="../src/elevationgraph.cpp" line="25"/>
+        <location filename="../src/elevationgraph.cpp" line="26"/>
         <source>Descent</source>
         <translation>Klesání</translation>
     </message>
     <message>
-        <location filename="../src/elevationgraph.cpp" line="29"/>
+        <location filename="../src/elevationgraph.cpp" line="30"/>
         <source>Minimum</source>
         <translation>Minimum</translation>
     </message>
     <message>
-        <location filename="../src/elevationgraph.cpp" line="88"/>
+        <location filename="../src/elevationgraph.cpp" line="89"/>
         <source>mi</source>
         <translation>mi</translation>
     </message>
     <message>
-        <location filename="../src/elevationgraph.cpp" line="89"/>
+        <location filename="../src/elevationgraph.cpp" line="90"/>
         <source>ft</source>
         <translation>ft</translation>
     </message>
     <message>
-        <location filename="../src/elevationgraph.cpp" line="27"/>
+        <location filename="../src/elevationgraph.cpp" line="28"/>
         <source>Maximum</source>
         <translation>Maximum</translation>
     </message>
@@ -59,352 +59,396 @@
 <context>
     <name>GUI</name>
     <message>
-        <location filename="../src/gui.cpp" line="161"/>
+        <location filename="../src/gui.cpp" line="172"/>
         <source>About Qt</source>
         <translation>O Qt</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="380"/>
+        <location filename="../src/gui.cpp" line="393"/>
         <source>GPXSee is distributed under the terms of the GNU General Public License version 3. For more info about GPXSee visit the project homepage at </source>
         <translation>Program GPXSee je distribuován pod podmínkami licence GNU General Public License verze 3. Pro více informací navštivte stránky programu na adrese </translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="441"/>
+        <location filename="../src/gui.cpp" line="454"/>
         <source>Open file</source>
         <translation>Otevřít soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="175"/>
+        <location filename="../src/gui.cpp" line="186"/>
         <source>Save as</source>
         <translation>Uložit jako</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="501"/>
+        <location filename="../src/gui.cpp" line="515"/>
         <source>Open POI file</source>
         <translation>Otevřít POI soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="166"/>
+        <location filename="../src/gui.cpp" line="177"/>
         <source>Open</source>
         <translation>Otevřít</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="149"/>
+        <location filename="../src/gui.cpp" line="160"/>
         <source>Quit</source>
         <translation>Ukončit</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="156"/>
-        <location filename="../src/gui.cpp" line="396"/>
-        <location filename="../src/gui.cpp" line="397"/>
+        <location filename="../src/gui.cpp" line="167"/>
+        <location filename="../src/gui.cpp" line="409"/>
+        <location filename="../src/gui.cpp" line="410"/>
         <source>Keyboard controls</source>
         <translation>Ovládací klávesy</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="170"/>
+        <location filename="../src/gui.cpp" line="181"/>
         <source>Save</source>
         <translation>Uložit</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="180"/>
+        <location filename="../src/gui.cpp" line="191"/>
         <source>Close</source>
         <translation>Zavřít</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="185"/>
+        <location filename="../src/gui.cpp" line="196"/>
         <source>Reload</source>
         <translation>Znovu načíst</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="317"/>
+        <location filename="../src/gui.cpp" line="328"/>
         <source>Show</source>
         <translation>Zobrazit</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="262"/>
-        <location filename="../src/gui.cpp" line="308"/>
+        <location filename="../src/gui.cpp" line="273"/>
+        <location filename="../src/gui.cpp" line="319"/>
         <source>File</source>
         <translation>Soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="154"/>
-        <location filename="../src/gui.cpp" line="414"/>
-        <location filename="../src/gui.cpp" line="415"/>
+        <location filename="../src/gui.cpp" line="165"/>
+        <location filename="../src/gui.cpp" line="427"/>
+        <location filename="../src/gui.cpp" line="428"/>
         <source>Data sources</source>
         <translation>Zdroje dat</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="192"/>
+        <location filename="../src/gui.cpp" line="203"/>
         <source>Load POI file</source>
         <translation>Nahrát POI soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="195"/>
+        <location filename="../src/gui.cpp" line="206"/>
         <source>Close POI files</source>
         <translation>Zavřit soubory POI</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="198"/>
+        <location filename="../src/gui.cpp" line="209"/>
         <source>Show POIs</source>
         <translation>Zobrazit POI</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="205"/>
+        <location filename="../src/gui.cpp" line="216"/>
         <source>Show map</source>
         <translation>Zobrazit mapu</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="218"/>
+        <location filename="../src/gui.cpp" line="229"/>
         <source>Show graphs</source>
         <translation>Zobrazovat grafy</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="224"/>
+        <location filename="../src/gui.cpp" line="235"/>
         <source>Show toolbars</source>
         <translation>Zobrazovat nástrojové lišty</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="231"/>
+        <location filename="../src/gui.cpp" line="242"/>
         <source>Metric</source>
         <translation>Metrické</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="237"/>
+        <location filename="../src/gui.cpp" line="248"/>
         <source>Imperial</source>
         <translation>Imperiální</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="244"/>
+        <location filename="../src/gui.cpp" line="255"/>
         <source>Next</source>
         <translation>Následující</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="247"/>
+        <location filename="../src/gui.cpp" line="258"/>
         <source>Previous</source>
         <translation>Předchozí</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="251"/>
+        <location filename="../src/gui.cpp" line="262"/>
         <source>Last</source>
         <translation>Poslední</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="254"/>
+        <location filename="../src/gui.cpp" line="265"/>
         <source>First</source>
         <translation>První</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="276"/>
+        <location filename="../src/gui.cpp" line="287"/>
         <source>Map</source>
         <translation>Mapa</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="281"/>
+        <location filename="../src/gui.cpp" line="292"/>
         <source>POI</source>
         <translation>POI</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="282"/>
+        <location filename="../src/gui.cpp" line="293"/>
         <source>POI files</source>
         <translation>POI soubory</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="290"/>
+        <location filename="../src/gui.cpp" line="301"/>
         <source>Settings</source>
         <translation>Nastavení</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="291"/>
+        <location filename="../src/gui.cpp" line="302"/>
         <source>Units</source>
         <translation>Jednotky</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="298"/>
+        <location filename="../src/gui.cpp" line="309"/>
         <source>Help</source>
         <translation>Nápověda</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="348"/>
+        <location filename="../src/gui.cpp" line="360"/>
         <source>Elevation</source>
         <translation>Výška</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="349"/>
+        <location filename="../src/gui.cpp" line="361"/>
         <source>Speed</source>
         <translation>Rychlost</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="399"/>
+        <location filename="../src/gui.cpp" line="362"/>
+        <source>Heart rate</source>
+        <translation>Tep</translation>
+    </message>
+    <message>
+        <location filename="../src/gui.cpp" line="412"/>
         <source>Next file</source>
         <translation>Následující soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="400"/>
+        <location filename="../src/gui.cpp" line="413"/>
         <source>Previous file</source>
         <translation>Předchozí soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="402"/>
+        <location filename="../src/gui.cpp" line="415"/>
         <source>First file</source>
         <translation>První soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="403"/>
+        <location filename="../src/gui.cpp" line="416"/>
         <source>Last file</source>
         <translation>Poslední soubor</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="404"/>
+        <location filename="../src/gui.cpp" line="417"/>
         <source>Append modifier</source>
         <translation>Modifikátor nahradit/přidat</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="418"/>
+        <location filename="../src/gui.cpp" line="431"/>
         <source>Map (tiles) source URLs are read on program startup from the following file:</source>
         <translation>URL mapových zdrojů (dlaždic) jsou načteny při startu programu z následujícího souboru:</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="422"/>
+        <location filename="../src/gui.cpp" line="435"/>
         <source>The file format is one map entry per line, consisting of the map name and tiles URL delimited by a TAB character. The tile X and Y coordinates are replaced with $x and $y in the URL and the zoom level is replaced with $z. An example map file could look like:</source>
         <translation>Formát souboru je jeden mapový záznam na řádku, kde mapový záznam sestává ze jména mapy a URL dlaždic navzájem oddělených tabulátorem. Souřadnice dlaždice jsou v URL nahrazeny řetězci $x a $y, úroven přiblížení (zoom) pak řetězcem $z. Příklad:</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="430"/>
+        <location filename="../src/gui.cpp" line="443"/>
         <source>To make GPXSee load a POI file automatically on startup, add the file to the following directory:</source>
         <translation>POI soubory, které se mají automaticky nahrát při startu programu jsou načítány z následujícího adresáře:</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="442"/>
+        <location filename="../src/gui.cpp" line="455"/>
         <source>GPX files (*.gpx);;All files (*)</source>
         <translation>soubory GPX (*.gpx);;všechny soubory (*)</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="492"/>
-        <location filename="../src/gui.cpp" line="509"/>
+        <location filename="../src/gui.cpp" line="506"/>
+        <location filename="../src/gui.cpp" line="523"/>
         <source>Line: %1</source>
         <translation>Řádka: %1</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="502"/>
+        <location filename="../src/gui.cpp" line="516"/>
         <source>GPX files (*.gpx);;CSV files (*.csv);;All files (*)</source>
         <translation>soubory GPX (*.gpx);;soubory CSV (*.csv);;všechny soubory (*)</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="577"/>
-        <location filename="../src/gui.cpp" line="697"/>
+        <location filename="../src/gui.cpp" line="585"/>
+        <location filename="../src/gui.cpp" line="707"/>
         <source>mi</source>
         <translation>mi</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="580"/>
-        <location filename="../src/gui.cpp" line="582"/>
-        <location filename="../src/gui.cpp" line="584"/>
-        <location filename="../src/gui.cpp" line="586"/>
+        <location filename="../src/gui.cpp" line="588"/>
+        <location filename="../src/gui.cpp" line="590"/>
+        <location filename="../src/gui.cpp" line="592"/>
+        <location filename="../src/gui.cpp" line="594"/>
         <source>ft</source>
         <translation>ft</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="583"/>
-        <location filename="../src/gui.cpp" line="595"/>
+        <location filename="../src/gui.cpp" line="591"/>
+        <location filename="../src/gui.cpp" line="603"/>
         <source>Maximum</source>
         <translation>Maximum</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="585"/>
-        <location filename="../src/gui.cpp" line="597"/>
+        <location filename="../src/gui.cpp" line="593"/>
+        <location filename="../src/gui.cpp" line="605"/>
         <source>Minimum</source>
         <translation>Minimum</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="159"/>
-        <location filename="../src/gui.cpp" line="376"/>
+        <location filename="../src/gui.cpp" line="170"/>
+        <location filename="../src/gui.cpp" line="389"/>
         <source>About GPXSee</source>
         <translation>O aplikaci GPXSee</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="324"/>
+        <location filename="../src/gui.cpp" line="335"/>
         <source>Navigation</source>
         <translation>Navigace</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="378"/>
+        <location filename="../src/gui.cpp" line="391"/>
         <source>GPX viewer and analyzer</source>
         <translation>Prohlížeč a analyzátor GPX</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="417"/>
+        <location filename="../src/gui.cpp" line="430"/>
         <source>Map sources</source>
         <translation>Mapové zdroje</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="429"/>
+        <location filename="../src/gui.cpp" line="442"/>
         <source>POIs</source>
         <translation>POI body</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="576"/>
-        <location filename="../src/gui.cpp" line="588"/>
+        <location filename="../src/gui.cpp" line="584"/>
+        <location filename="../src/gui.cpp" line="596"/>
         <source>Distance</source>
         <translation>Vzdálenost</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="578"/>
-        <location filename="../src/gui.cpp" line="590"/>
+        <location filename="../src/gui.cpp" line="586"/>
+        <location filename="../src/gui.cpp" line="598"/>
         <source>Time</source>
         <translation>Čas</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="579"/>
-        <location filename="../src/gui.cpp" line="591"/>
+        <location filename="../src/gui.cpp" line="587"/>
+        <location filename="../src/gui.cpp" line="599"/>
         <source>Ascent</source>
         <translation>Stoupání</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="592"/>
-        <location filename="../src/gui.cpp" line="594"/>
-        <location filename="../src/gui.cpp" line="596"/>
-        <location filename="../src/gui.cpp" line="598"/>
+        <location filename="../src/gui.cpp" line="600"/>
+        <location filename="../src/gui.cpp" line="602"/>
+        <location filename="../src/gui.cpp" line="604"/>
+        <location filename="../src/gui.cpp" line="606"/>
         <source>m</source>
         <translation>m</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="581"/>
-        <location filename="../src/gui.cpp" line="593"/>
+        <location filename="../src/gui.cpp" line="589"/>
+        <location filename="../src/gui.cpp" line="601"/>
         <source>Descent</source>
         <translation>Klesání</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="693"/>
+        <location filename="../src/gui.cpp" line="703"/>
         <source>%1 tracks</source>
         <translation>Počet tras: %1</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="589"/>
-        <location filename="../src/gui.cpp" line="700"/>
+        <location filename="../src/gui.cpp" line="597"/>
+        <location filename="../src/gui.cpp" line="710"/>
         <source>km</source>
         <translation>km</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="494"/>
-        <location filename="../src/gui.cpp" line="510"/>
+        <location filename="../src/gui.cpp" line="508"/>
+        <location filename="../src/gui.cpp" line="524"/>
         <source>Error</source>
         <translation>Chyba</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="489"/>
+        <location filename="../src/gui.cpp" line="503"/>
         <source>Error loading GPX file:
 %1</source>
         <translation>Soubor GPX nelze otevřít:
 %1</translation>
     </message>
     <message>
-        <location filename="../src/gui.cpp" line="506"/>
+        <location filename="../src/gui.cpp" line="520"/>
         <source>Error loading POI file:
 %1</source>
         <translation>Soubor POI nelze otevřít:
 %1</translation>
     </message>
 </context>
+<context>
+    <name>HeartRateGraph</name>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="9"/>
+        <source>Distance</source>
+        <translation>Vzdálenost</translation>
+    </message>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="10"/>
+        <source>Heart rate</source>
+        <translation>Tep</translation>
+    </message>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="11"/>
+        <location filename="../src/heartrategraph.cpp" line="74"/>
+        <source>km</source>
+        <translation>km</translation>
+    </message>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="12"/>
+        <source>1/min</source>
+        <translation>1/min</translation>
+    </message>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="19"/>
+        <source>Average</source>
+        <translation>Průměr</translation>
+    </message>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="21"/>
+        <source>Maximum</source>
+        <translation>Maximum</translation>
+    </message>
+    <message>
+        <location filename="../src/heartrategraph.cpp" line="77"/>
+        <source>mi</source>
+        <translation>mi</translation>
+    </message>
+</context>
 <context>
     <name>QObject</name>
     <message>

src/elevationgraph.cpp

@@ -11,12 +11,12 @@ ElevationGraph::ElevationGraph(QWidget *parent) : GraphView(parent)
 	_max = -FLT_MAX;
 	_min = FLT_MAX;
 
-	GraphView::setXLabel(tr("Distance"));
-	GraphView::setYLabel(tr("Elevation"));
-	GraphView::setXUnits(tr("km"));
-	GraphView::setYUnits(tr("m"));
-	GraphView::setXScale(M2KM);
-	GraphView::setMinRange(50.0);
+	setXLabel(tr("Distance"));
+	setYLabel(tr("Elevation"));
+	setXUnits(tr("km"));
+	setYUnits(tr("m"));
+	setXScale(M2KM);
+	setMinRange(50.0);
 }
 
 void ElevationGraph::addInfo()
@@ -38,14 +38,16 @@ void ElevationGraph::loadGPX(const GPX &gpx)
 		qreal min, max, ascent = 0, descent = 0;
 
 		gpx.track(i).elevationGraph(data);
-		if (data.isEmpty())
+		if (data.count() < 2) {
+			skipColor();
 			continue;
+		}
 
 		min = max = data.at(0).y();
 
-		for (int i = 1; i < data.size(); i++) {
-			qreal cur = data.at(i).y();
-			qreal prev = data.at(i-1).y();
+		for (int j = 1; j < data.size(); j++) {
+			qreal cur = data.at(j).y();
+			qreal prev = data.at(j-1).y();
 
 			if (cur > prev)
 				ascent += cur - prev;
@@ -81,15 +83,15 @@ void ElevationGraph::clear()
 void ElevationGraph::setUnits(enum Units units)
 {
 	if (units == Metric) {
-		GraphView::setXUnits(tr("km"));
-		GraphView::setYUnits(tr("m"));
-		GraphView::setXScale(M2KM);
-		GraphView::setYScale(1);
+		setXUnits(tr("km"));
+		setYUnits(tr("m"));
+		setXScale(M2KM);
+		setYScale(1);
 	} else {
-		GraphView::setXUnits(tr("mi"));
-		GraphView::setYUnits(tr("ft"));
-		GraphView::setXScale(M2MI);
-		GraphView::setYScale(M2FT);
+		setXUnits(tr("mi"));
+		setYUnits(tr("ft"));
+		setXScale(M2MI);
+		setYScale(M2FT);
 	}
 
 	clearInfo();

src/graphview.cpp

@@ -294,7 +294,7 @@ void GraphView::emitSliderPositionChanged(const QPointF &pos)
 		return;
 
 	qreal val = pos.x() / _slider->area().width();
-	emit sliderPositionChanged(val);
+	emit sliderPositionChanged(val * (_xMax - _xMin));
 
 	const QPainterPath &path = _graphs.at(0)->path();
 	QRectF br = path.boundingRect();
@@ -309,18 +309,27 @@ void GraphView::emitSliderPositionChanged(const QPointF &pos)
 
 qreal GraphView::sliderPosition() const
 {
-	return _slider->pos().x() / _slider->area().width();
+	if (!_slider->isVisible())
+		return -1;
+	else
+		return (_slider->pos().x() / _slider->area().width()) * (_xMax - _xMin);
 }
 
 void GraphView::setSliderPosition(qreal pos)
 {
-	_slider->setPos(pos * _slider->area().width(), 0);
+	if (pos > (_xMax - _xMin))
+		_slider->setVisible(false);
+	else {
+		_slider->setPos((pos / (_xMax - _xMin)) * _slider->area().width(), 0);
+		_slider->setVisible(true);
+	}
 }
 
 void GraphView::newSliderPosition(const QPointF &pos)
 {
 	if (_slider->area().contains(pos)) {
 		_slider->setPos(pos);
+		_slider->setVisible(true);
 		emitSliderPositionChanged(pos);
 	}
 }

src/graphview.h

@@ -55,6 +55,8 @@ public:
 	void addInfo(const QString &key, const QString &value);
 	void clearInfo();
 
+	void skipColor() {_palette.color();}
+
 signals:
 	void sliderPositionChanged(qreal);
 

src/gui.cpp

@@ -22,6 +22,7 @@
 #include "maplist.h"
 #include "elevationgraph.h"
 #include "speedgraph.h"
+#include "heartrategraph.h"
 #include "trackview.h"
 #include "infoitem.h"
 #include "filebrowser.h"
@@ -56,6 +57,8 @@ GUI::GUI(QWidget *parent) : QMainWindow(parent)
 	  SLOT(movePositionMarker(qreal)));
 	connect(_speedGraph, SIGNAL(sliderPositionChanged(qreal)), _track,
 	  SLOT(movePositionMarker(qreal)));
+	connect(_heartRateGraph, SIGNAL(sliderPositionChanged(qreal)), _track,
+	  SLOT(movePositionMarker(qreal)));
 
 	_browser = new FileBrowser(this);
 	_browser->setFilter(QStringList("*.gpx"));
@@ -75,6 +78,9 @@ GUI::GUI(QWidget *parent) : QMainWindow(parent)
 	_time = 0;
 	_trackCount = 0;
 
+	_lastGraph = static_cast<GraphView*>(_trackGraphs->currentWidget());
+	_lastSliderPos = _lastGraph->sliderPosition();
+
 	resize(600, 800);
 }
 
@@ -349,10 +355,12 @@ void GUI::createTrackGraphs()
 {
 	_elevationGraph = new ElevationGraph;
 	_speedGraph = new SpeedGraph;
+	_heartRateGraph = new HeartRateGraph;
 
 	_trackGraphs = new QTabWidget;
 	_trackGraphs->addTab(_elevationGraph, tr("Elevation"));
 	_trackGraphs->addTab(_speedGraph, tr("Speed"));
+	_trackGraphs->addTab(_heartRateGraph, tr("Heart rate"));
 	connect(_trackGraphs, SIGNAL(currentChanged(int)), this,
 	  SLOT(graphChanged(int)));
 
@@ -478,6 +486,7 @@ bool GUI::loadFile(const QString &fileName)
 	if (gpx.loadFile(fileName)) {
 		_elevationGraph->loadGPX(gpx);
 		_speedGraph->loadGPX(gpx);
+		_heartRateGraph->loadGPX(gpx);
 		_track->loadGPX(gpx);
 		if (_showPOIAction->isChecked())
 			_track->loadPOI(_poi);
@@ -611,6 +620,7 @@ void GUI::reloadFile()
 
 	_elevationGraph->clear();
 	_speedGraph->clear();
+	_heartRateGraph->clear();
 	_track->clear();
 
 	for (int i = 0; i < _files.size(); i++) {
@@ -635,6 +645,7 @@ void GUI::closeFile()
 
 	_elevationGraph->clear();
 	_speedGraph->clear();
+	_heartRateGraph->clear();
 	_track->clear();
 
 	_files.clear();
@@ -721,10 +732,11 @@ void GUI::poiFileChecked(int index)
 
 void GUI::graphChanged(int index)
 {
-	if (_trackGraphs->widget(index) == _elevationGraph)
-		_elevationGraph->setSliderPosition(_speedGraph->sliderPosition());
-	else if (_trackGraphs->widget(index) == _speedGraph)
-		_speedGraph->setSliderPosition(_elevationGraph->sliderPosition());
+	GraphView *tv = static_cast<GraphView*>(_trackGraphs->widget(index));
+	if (_lastGraph->sliderPosition() >= 0)
+		_lastSliderPos = _lastGraph->sliderPosition();
+	tv->setSliderPosition(_lastSliderPos);
+	_lastGraph = tv;
 }
 
 void GUI::updateNavigationActions()
@@ -751,6 +763,7 @@ void GUI::setMetricUnits()
 	_track->setUnits(Metric);
 	_elevationGraph->setUnits(Metric);
 	_speedGraph->setUnits(Metric);
+	_heartRateGraph->setUnits(Metric);
 	updateStatusBarInfo();
 }
 
@@ -759,6 +772,7 @@ void GUI::setImperialUnits()
 	_track->setUnits(Imperial);
 	_elevationGraph->setUnits(Imperial);
 	_speedGraph->setUnits(Imperial);
+	_heartRateGraph->setUnits(Imperial);
 	updateStatusBarInfo();
 }
 

src/gui.h

@@ -14,8 +14,10 @@ class QAction;
 class QLabel;
 class QSignalMapper;
 class FileBrowser;
+class GraphView;
 class ElevationGraph;
 class SpeedGraph;
+class HeartRateGraph;
 class TrackView;
 class Map;
 
@@ -124,6 +126,7 @@ private:
 
 	ElevationGraph *_elevationGraph;
 	SpeedGraph *_speedGraph;
+	HeartRateGraph *_heartRateGraph;
 	TrackView *_track;
 
 	POI _poi;
@@ -137,6 +140,9 @@ private:
 	qreal _distance;
 	qreal _time;
 	int _trackCount;
+
+	GraphView *_lastGraph;
+	qreal _lastSliderPos;
 };
 
 #endif // GUI_H

src/heartrategraph.cpp

@@ -0,0 +1,87 @@
+#include "gpx.h"
+#include "heartrategraph.h"
+
+
+HeartRateGraph::HeartRateGraph(QWidget *parent) : GraphView(parent)
+{
+	_max = 0;
+
+	setXLabel(tr("Distance"));
+	setYLabel(tr("Heart rate"));
+	setXUnits(tr("km"));
+	setYUnits(tr("1/min"));
+	setXScale(M2KM);
+	setPrecision(0);
+}
+
+void HeartRateGraph::addInfo()
+{
+	GraphView::addInfo(tr("Average"), QString::number(avg() * _yScale, 'f', 0)
+	  + UNIT_SPACE + _yUnits);
+	GraphView::addInfo(tr("Maximum"), QString::number(_max * _yScale,  'f', 0)
+	  + UNIT_SPACE + _yUnits);
+}
+
+void HeartRateGraph::loadGPX(const GPX &gpx)
+{
+	for (int i = 0; i < gpx.trackCount(); i++) {
+		QVector<QPointF> data;
+		qreal max = 0, sum = 0, w = 0;
+
+		gpx.track(i).heartRateGraph(data);
+		if (data.count() < 2) {
+			skipColor();
+			continue;
+		}
+
+		for (int j = 1; j < data.size(); j++) {
+			sum += data.at(j).y() * (data.at(j).x() - data.at(j-1).x());
+			w += data.at(j).x() - data.at(j-1).x();
+		}
+		_avg.append(QPointF(gpx.track(i).distance(), sum/w));
+
+		for (int j = 0; j < data.size(); j++)
+			max = qMax(max, data.at(j).y());
+		_max = qMax(_max, max);
+
+		addInfo();
+		loadData(data);
+	}
+}
+
+qreal HeartRateGraph::avg() const
+{
+	qreal sum = 0, w = 0;
+	QList<QPointF>::const_iterator it;
+
+	for (it = _avg.begin(); it != _avg.end(); it++) {
+		sum += it->y() * it->x();
+		w += it->x();
+	}
+
+	return (sum / w);
+}
+
+void HeartRateGraph::clear()
+{
+	_max = 0;
+	_avg.clear();
+
+	GraphView::clear();
+}
+
+void HeartRateGraph::setUnits(enum Units units)
+{
+	if (units == Metric) {
+		setXUnits(tr("km"));
+		setXScale(M2KM);
+	} else {
+		setXUnits(tr("mi"));
+		setXScale(M2MI);
+	}
+
+	clearInfo();
+	addInfo();
+
+	redraw();
+}

src/heartrategraph.h

@@ -0,0 +1,30 @@
+#ifndef HEARTRATEGRAPH_H
+#define HEARTRATEGRAPH_H
+
+#include "graphview.h"
+#include "units.h"
+
+class GPX;
+
+class HeartRateGraph : public GraphView
+{
+	Q_OBJECT
+
+public:
+	HeartRateGraph(QWidget *parent = 0);
+
+	void loadGPX(const GPX &gpx);
+	void clear();
+	void setUnits(enum Units units);
+
+	qreal avg() const;
+	qreal max() const {return _max;}
+
+private:
+	void addInfo();
+
+	qreal _max;
+	QList<QPointF> _avg;
+};
+
+#endif // HEARTRATEGRAPH_H

src/parser.cpp

@@ -5,16 +5,18 @@ void Parser::handleExtensionData(QStringRef element, const QString &value)
 {
 	if (element == "speed")
 		_track->last().speed = value.toDouble();
+	else if (element == "hr" || element == "heartrate")
+		_track->last().heartRate = value.toDouble();
 }
 
 void Parser::handleTrekPointData(QStringRef element, const QString &value)
 {
 	if (element == "ele")
 		_track->last().elevation = value.toLatin1().toDouble();
-	if (element == "time")
+	else if (element == "time")
 		_track->last().timestamp = QDateTime::fromString(value.toLatin1(),
 		  Qt::ISODate);
-	if (element == "geoidheight")
+	else if (element == "geoidheight")
 		_track->last().geoidheight = value.toLatin1().toDouble();
 }
 
@@ -40,7 +42,8 @@ void Parser::handleWayPointAttributes(const QXmlStreamAttributes &attr)
 void Parser::extensions()
 {
 	while (_reader.readNextStartElement()) {
-		if (_reader.name() == "speed")
+		if (_reader.name() == "speed" || _reader.name() == "hr"
+		  || _reader.name() == "heartrate")
 			handleExtensionData(_reader.name(), _reader.readElementText());
 		else
 			_reader.skipCurrentElement();

src/speedgraph.cpp

@@ -7,13 +7,13 @@ SpeedGraph::SpeedGraph(QWidget *parent) : GraphView(parent)
 {
 	_max = 0;
 
-	GraphView::setXLabel(tr("Distance"));
-	GraphView::setYLabel(tr("Speed"));
-	GraphView::setXUnits(tr("km"));
-	GraphView::setYUnits(tr("km/h"));
-	GraphView::setXScale(M2KM);
-	GraphView::setYScale(MS2KMH);
-	GraphView::setPrecision(1);
+	setXLabel(tr("Distance"));
+	setYLabel(tr("Speed"));
+	setXUnits(tr("km"));
+	setYUnits(tr("km/h"));
+	setXScale(M2KM);
+	setYScale(MS2KMH);
+	setPrecision(1);
 }
 
 void SpeedGraph::addInfo()
@@ -31,14 +31,16 @@ void SpeedGraph::loadGPX(const GPX &gpx)
 		qreal max = 0;
 
 		gpx.track(i).speedGraph(data);
-		if (data.isEmpty())
+		if (data.count() < 2) {
+			skipColor();
 			continue;
+		}
 
 		_avg.append(QPointF(gpx.track(i).distance(), gpx.track(i).distance()
 		  / gpx.track(i).time()));
 
-		for (int i = 0; i < data.size(); i++)
-			max = qMax(max, data.at(i).y());
+		for (int j = 0; j < data.size(); j++)
+			max = qMax(max, data.at(j).y());
 		_max = qMax(_max, max);
 
 		addInfo();
@@ -70,15 +72,15 @@ void SpeedGraph::clear()
 void SpeedGraph::setUnits(enum Units units)
 {
 	if (units == Metric) {
-		GraphView::setXUnits(tr("km"));
-		GraphView::setYUnits(tr("km/h"));
-		GraphView::setXScale(M2KM);
-		GraphView::setYScale(MS2KMH);
+		setXUnits(tr("km"));
+		setYUnits(tr("km/h"));
+		setXScale(M2KM);
+		setYScale(MS2KMH);
 	} else {
-		GraphView::setXUnits(tr("mi"));
-		GraphView::setYUnits(tr("mi/h"));
-		GraphView::setXScale(M2MI);
-		GraphView::setYScale(MS2MIH);
+		setXUnits(tr("mi"));
+		setYUnits(tr("mi/h"));
+		setXScale(M2MI);
+		setYScale(MS2MIH);
 	}
 
 	clearInfo();

src/track.cpp

@@ -6,6 +6,8 @@
 #define WINDOW_EF 3
 #define WINDOW_SE 11
 #define WINDOW_SF 11
+#define WINDOW_HE 7
+#define WINDOW_HF 5
 
 static bool lt(const QPointF &p1, const QPointF &p2)
 {
@@ -78,6 +80,18 @@ static QVector<QPointF> filter(const QVector<QPointF> &v, int window)
 	return ret;
 }
 
+Track::Track(const QVector<Trackpoint> &data) : _data(data)
+{
+	_distance = 0;
+
+	for (int i = 1; i < _data.count(); i++)
+		_dd.append(llDistance(_data.at(i).coordinates,
+		  _data.at(i-1).coordinates));
+
+	for (int i = 0; i < _dd.size(); i++)
+		_distance += _dd.at(i);
+}
+
 void Track::elevationGraph(QVector<QPointF> &graph) const
 {
 	qreal dist = 0;
@@ -86,12 +100,12 @@ void Track::elevationGraph(QVector<QPointF> &graph) const
 	if (!_data.size())
 		return;
 
-	if (isnan(_data.at(0).elevation))
+	if (std::isnan(_data.at(0).elevation))
 		return;
 	raw.append(QPointF(0, _data.at(0).elevation));
 	for (int i = 1; i < _data.size(); i++) {
-		dist += llDistance(_data.at(i).coordinates, _data.at(i-1).coordinates);
-		if (isnan(_data.at(i).elevation))
+		dist += _dd.at(i-1);
+		if (std::isnan(_data.at(i).elevation))
 			return;
 		raw.append(QPointF(dist,  _data.at(i).elevation
 		  - _data.at(i).geoidheight));
@@ -110,11 +124,11 @@ void Track::speedGraph(QVector<QPointF> &graph) const
 
 	raw.append(QPointF(0, 0));
 	for (int i = 1; i < _data.size(); i++) {
-		ds = llDistance(_data.at(i).coordinates, _data.at(i-1).coordinates);
+		ds = _dd.at(i-1);
 		dt = _data.at(i-1).timestamp.msecsTo(_data.at(i).timestamp) / 1000.0;
 		dist += ds;
 
-		if (isnan(_data.at(i).speed)) {
+		if (std::isnan(_data.at(i).speed)) {
 			if (dt == 0)
 				continue;
 			v = ds / dt;
@@ -127,22 +141,30 @@ void Track::speedGraph(QVector<QPointF> &graph) const
 	graph = filter(eliminate(raw, WINDOW_SE), WINDOW_SF);
 }
 
+void Track::heartRateGraph(QVector<QPointF> &graph) const
+{
+	qreal dist = 0;
+	QVector<QPointF> raw;
+
+	if (std::isnan(_data.at(0).heartRate))
+		return;
+	raw.append(QPointF(0, _data.at(0).heartRate));
+	for (int i = 1; i < _data.count(); i++) {
+		if (std::isnan(_data.at(i).heartRate))
+			return;
+		dist += _dd.at(i-1);
+		raw.append(QPointF(dist, _data.at(i).heartRate));
+	}
+
+	graph = filter(eliminate(raw, WINDOW_HE), WINDOW_HF);
+}
+
 void Track::track(QVector<QPointF> &track) const
 {
 	for (int i = 0; i < _data.size(); i++)
 		track.append(_data.at(i).coordinates);
 }
 
-qreal Track::distance() const
-{
-	qreal dist = 0;
-
-	for (int i = 1; i < _data.size(); i++)
-		dist += llDistance(_data.at(i).coordinates, _data.at(i-1).coordinates);
-
-	return dist;
-}
-
 qreal Track::time() const
 {
 	if (_data.size() < 2)

src/track.h

@@ -8,17 +8,20 @@
 class Track
 {
 public:
-	Track(const QVector<Trackpoint> &data) : _data(data) {}
+	Track(const QVector<Trackpoint> &data);
 
 	void elevationGraph(QVector<QPointF> &graph) const;
 	void speedGraph(QVector<QPointF> &graph) const;
+	void heartRateGraph(QVector<QPointF> &graph) const;
 	void track(QVector<QPointF> &track) const;
-	qreal distance() const;
+	qreal distance() const {return _distance;}
 	qreal time() const;
 	QDateTime date() const;
 
 private:
 	const QVector<Trackpoint> &_data;
+	QVector<qreal> _dd;
+	qreal _distance;
 };
 
 #endif // TRACK_H

src/trackpoint.h

@@ -12,8 +12,14 @@ struct Trackpoint
 	qreal elevation;
 	qreal geoidheight;
 	qreal speed;
+	qreal heartRate;
 
-	Trackpoint() {elevation = NAN; geoidheight = 0; speed = NAN;}
+	Trackpoint() {
+		elevation = NAN;
+		geoidheight = 0;
+		speed = NAN;
+		heartRate = NAN;
+	}
 };
 
 #endif // TRACKPOINT_H

src/trackview.cpp

@@ -34,7 +34,8 @@ TrackView::TrackView(QWidget *parent)
 	_zoom = ZOOM_MAX;
 	_scale = mapScale(_zoom);
 	_map = 0;
-	_maxLen = 0;
+	_maxPath = 0;
+	_maxDistance = 0;
 }
 
 TrackView::~TrackView()
@@ -61,8 +62,7 @@ void TrackView::addTrack(const QVector<QPointF> &track)
 		path.lineTo(ll2mercator(QPointF(p.x(), -p.y())));
 	}
 
-	_maxLen = qMax(path.length(), _maxLen);
-
+	_maxPath = qMax(path.length(), _maxPath);
 
 	pi = new QGraphicsPathItem(path);
 	_paths.append(pi);
@@ -108,6 +108,7 @@ void TrackView::loadGPX(const GPX &gpx)
 		QVector<QPointF> track;
 		gpx.track(i).track(track);
 		addTrack(track);
+		_maxDistance = qMax(gpx.track(i).distance(), _maxDistance);
 	}
 
 	addWaypoints(gpx.waypoints());
@@ -403,7 +404,8 @@ void TrackView::clear()
 	_tracks.clear();
 	_waypoints.clear();
 
-	_maxLen = 0;
+	_maxPath = 0;
+	_maxDistance = 0;
 	_zoom = ZOOM_MAX;
 	_scale = mapScale(_zoom);
 
@@ -412,11 +414,17 @@ void TrackView::clear()
 
 void TrackView::movePositionMarker(qreal val)
 {
+	qreal mp = val / _maxDistance;
+
 	for (int i = 0; i < _paths.size(); i++) {
-		qreal f = _maxLen / _paths.at(i)->path().length();
-		QPointF pos = _paths.at(i)->path().pointAtPercent(qMin(val * f,
-		  1.0));
-		_markers.at(i)->setPos(pos);
+		qreal f = _maxPath / _paths.at(i)->path().length();
+		if (mp * f > 1.0)
+			_markers.at(i)->setVisible(false);
+		else {
+			QPointF pos = _paths.at(i)->path().pointAtPercent(mp * f);
+			_markers.at(i)->setPos(pos);
+			_markers.at(i)->setVisible(true);
+		}
 	}
 }
 

src/trackview.h

@@ -75,7 +75,7 @@ private:
 	ScaleItem *_mapScale;
 
 	Palette _palette;
-	qreal _maxLen;
+	qreal _maxPath, _maxDistance;
 
 	qreal _scale;
 	int _zoom;