Started the code for the Profile Plotting

This small patch adds a new class - ProfileGraphicsView
it's a QGraphicsView based class that will holds all
graphics-items for the plotting.

The setup is simple, just call ui->ListView->plot( dive )  ( that's
already a ProfileGraphicsView and magic will happen.

Since Im using a QGraphicsView , the size of the canvas doesn't
matter and I'm fixing it at 0,0,100,100. when a resize is done,
the resizeEvent will be called, fitting the scene's rectangle on
the view.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>

qt-ui/profilegraphics.cpp

@@ -0,0 +1,26 @@
+#include "profilegraphics.h"
+
+#include <QGraphicsScene>
+#include <QResizeEvent>
+
+#include <QDebug>
+
+ProfileGraphicsView::ProfileGraphicsView(QWidget* parent) : QGraphicsView(parent)
+{
+	setScene(new QGraphicsScene());
+	scene()->setSceneRect(0,0,100,100);
+}
+
+void ProfileGraphicsView::plot(struct dive *d)
+{
+	qDebug() << "Start the plotting of the dive here.";
+}
+
+void ProfileGraphicsView::resizeEvent(QResizeEvent *event)
+{
+	// Fits the scene's rectangle on the view.
+	// I can pass some parameters to this -
+	// like Qt::IgnoreAspectRatio or Qt::KeepAspectRatio
+	QRectF r = scene()->sceneRect();
+	fitInView ( r.x() - 2, r.y() -2, r.width() + 4, r.height() + 4); // do a little bit of spacing;
+}