diff -r dfefb6003498 -r c55e1f2a4db4 mainwindow.cc
--- a/mainwindow.cc	Sun Jan 29 00:38:40 2012 +0100
+++ b/mainwindow.cc	Sun Jan 29 01:51:02 2012 +0100
@@ -9,6 +9,7 @@
 
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), ui_(new Ui::MainWindow),
+    igc_(0),
     plot_(new QwtPlot(tr("Altitude"), this))
 {
     ui_->setupUi(this);
@@ -41,6 +42,8 @@
 MainWindow::~MainWindow()
 {
     delete ui_;
+    delete igc_;
+    delete plot_;
 }
 
 void MainWindow::open(const QString &s)
@@ -72,9 +75,16 @@
     setWindowTitle(QFileInfo(fileName).baseName());
     statusBar()->showMessage(tr("opening %1").arg(fileName), 5000);
 
-    igc_.read(input_);
+    delete igc_;
+    igc_ = new IGC(input_);
 
+    showInfo();
+    showProfile();
 
+}
+
+void MainWindow::showInfo()
+{
     // now let's fill the table
     QTableWidget *t = ui_->table;
     int r = 0;
@@ -88,57 +98,32 @@
     // fill
     t->setRowCount(t->rowCount() + 1);
     t->setItem(r, K, new QTableWidgetItem(tr("Pilot")));
-    t->setItem(r, V, new QTableWidgetItem(igc_.pilot()));
+    t->setItem(r, V, new QTableWidgetItem(igc_->pilot()));
     ++r;
 
     t->setRowCount(t->rowCount() + 1);
     t->setItem(r, K, new QTableWidgetItem(tr("Date")));
-    t->setItem(r, V, new QTableWidgetItem(igc_
-	.date()
+    t->setItem(r, V, new QTableWidgetItem(igc_->date()
 	.toString(DefaultLocaleLongDate)));
     ++r;
 
     t->setRowCount(t->rowCount() + 1);
     t->setItem(r, K, new QTableWidgetItem(tr("Glider")));
-    t->setItem(r, V, new QTableWidgetItem(igc_.glider()));
+    t->setItem(r, V, new QTableWidgetItem(igc_->glider()));
     ++r;
 
     t->setRowCount(t->rowCount() + 1);
     t->setItem(r, K, new QTableWidgetItem(tr("Place")));
-    t->setItem(r, V, new QTableWidgetItem(igc_.start().longitude() + " / " + igc_.start().latitude()));
+    t->setItem(r, V, new QTableWidgetItem(igc_->start().longitude() + " / " + igc_->start().latitude()));
     ++r;
 
-    showProfile();
 
 }
 
 void MainWindow::showProfile()
 {
-	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 (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));
-	}
-
-#ifdef MYPLOT
-	myPlot_.draw(altitudesBaro.begin(), altitudesBaro.end());
-	myPlot_.draw(altitudesGPS.begin(), altitudesGPS.end());
-	ui_->altitude->setScene(&myPlot_);
-#endif
+	QVector<QPointF> pointsGPS = igc_->altitude(Fix::gps);
+	QVector<QPointF> pointsBaro = igc_->altitude(Fix::baro);
 
 	QwtPlotCurve *gps = new QwtPlotCurve(tr("Altitude GPS"));
 	QwtPlotCurve *baro = new QwtPlotCurve(tr("Altitude barometric"));