diff -r 4d79c3f357ad -r dfefb6003498 mainwindow.cc
--- a/mainwindow.cc	Sat Jan 28 13:03:19 2012 +0100
+++ b/mainwindow.cc	Sun Jan 29 00:38:40 2012 +0100
@@ -1,22 +1,38 @@
 #include "mainwindow.h"
+#include <qwt_plot_curve.h>
+
 #include "ui_mainwindow.h"
 #include "plot.h"
 
+
 using Qt::DefaultLocaleLongDate;
 
 MainWindow::MainWindow(QWidget *parent)
-    : QMainWindow(parent), ui(new Ui::MainWindow)
+    : QMainWindow(parent), ui_(new Ui::MainWindow),
+    plot_(new QwtPlot(tr("Altitude"), this))
 {
-    ui->setupUi(this);
-    connect(ui->actionAboutQt, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
-    connect(ui->actionExit, SIGNAL(triggered()), qApp, SLOT(quit()));
-    connect(ui->actionOpen, SIGNAL(triggered()), this, SLOT(open()));
+    ui_->setupUi(this);
+    ui_->tabs->setCurrentIndex(0);	// avoid changes done in the designer!
+
+    // prepare the Qwt tab
+    plot_->setAxisTitle(plot_->yLeft, tr("Altitude"));
+    plot_->setAxisTitle(plot_->xBottom, tr("Time"));
 
+    ui_->qwt->setLayout(new QGridLayout);
+    ui_->qwt->layout()->addWidget(plot_);
+
+#ifndef MYPLOT
+    ui_->tabs->removeTab(1);		// altitude
+#endif
+
+    connect(ui_->actionAboutQt, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+    connect(ui_->actionExit, SIGNAL(triggered()), qApp, SLOT(quit()));
+    connect(ui_->actionOpen, SIGNAL(triggered()), this, SLOT(open()));
 
 
     /*
     QNetworkProxy::setApplicationProxy(QNetworkProxy(QNetworkProxy::HttpProxy, "localhost", 3128));
-    ui->view->load(QUrl("http://maps.google.com/"));
+    ui_->view->load(QUrl("http://maps.google.com/"));
     */
 
 
@@ -24,7 +40,7 @@
 
 MainWindow::~MainWindow()
 {
-    delete ui;
+    delete ui_;
 }
 
 void MainWindow::open(const QString &s)
@@ -60,7 +76,7 @@
 
 
     // now let's fill the table
-    QTableWidget *t = ui->table;
+    QTableWidget *t = ui_->table;
     int r = 0;
     const int K = 0;
     const int V = 1;
@@ -92,42 +108,47 @@
     t->setItem(r, V, new QTableWidgetItem(igc_.start().longitude() + " / " + igc_.start().latitude()));
     ++r;
 
-
     showProfile();
 
 }
 
 void MainWindow::showProfile()
 {
-    Plot *plot = new Plot(this);
+	const Fixes f = igc_.fixes();
+#ifdef MYPLOT
+	QList< QPair<QTime, int> > altitudesBaro;
+	QList< QPair<QTime, int> > altitudesGPS;
+#endif
+	QVector<QPointF> pointsGPS;
+	QVector<QPointF> pointsBaro;
 
-    /*
-    for (IGC::Iterator i = igc_.begin()
-	 i != igc_.end();
-	 ++i) {
-	 qDebug() << *i;
-    }
-    */
-
-    // get all the altitudes
-    const Fixes f = igc_.fixes();
-    QList< QPair<QTime, int> > altitudesBaro;
-    QList< QPair<QTime, int> > altitudesGPS;
 
-    for (Fixes::const_iterator i = f.begin();
-	 i != f.end();
-	 i++) {
-	 altitudesBaro << i->altitudeFix(Fix::baro);
-	 altitudesGPS << i->altitudeFix(Fix::gps);
-    }
+	for (Fixes::const_iterator i = f.begin();
+	     i != f.end();
+	     i++) {
+#ifdef MYPLOT
+	     altitudesBaro << i->altitudeFix(Fix::baro);
+	     altitudesGPS << i->altitudeFix(Fix::gps);
+#endif
+	     pointsGPS << QPointF(QTime().secsTo(i->time()), i->altitude(Fix::gps));
+	     pointsBaro << QPointF(QTime().secsTo(i->time()), i->altitude(Fix::baro));
+	}
 
-    /*
-    plot->setXAxis(0, 100, 10);
-    plot->setYAxis(0, 200, 10);
-    */
-    plot->draw(altitudesBaro.begin(), altitudesBaro.end());
-    plot->draw(altitudesGPS.begin(), altitudesGPS.end());
-    ui->altitude->setScene(plot);
+#ifdef MYPLOT
+	myPlot_.draw(altitudesBaro.begin(), altitudesBaro.end());
+	myPlot_.draw(altitudesGPS.begin(), altitudesGPS.end());
+	ui_->altitude->setScene(&myPlot_);
+#endif
 
-   // ui->altitude->show();
+	QwtPlotCurve *gps = new QwtPlotCurve(tr("Altitude GPS"));
+	QwtPlotCurve *baro = new QwtPlotCurve(tr("Altitude barometric"));
+	QwtPointSeriesData *dataGPS = new QwtPointSeriesData(pointsGPS);
+	QwtPointSeriesData *dataBaro = new QwtPointSeriesData(pointsBaro);
+	
+	gps->setData(dataGPS);
+	baro->setData(dataBaro);
+	gps->attach(plot_);
+	baro->attach(plot_);
+
+   // ui_->altitude->show();
 }