void mousePressEvent(QMouseEvent *e)
	{
		QColor colours[10] = { QColor(255,0,0), QColor(0,255,0), QColor(0,0,255),
				  QColor(0,0,0), QColor(255,255,255),
				  QColor(0,128,64) };
		static int i;
		switch (e->button())
		{
		case Qt::LeftButton:
			clusters.push_back(new Cluster(e->x() %width(), e->y() %height(), colours[i]));
			Cluster* cc;
			for each(KPoint* p in kpoints)
			{
				double minim=1000;
				for each (Cluster* c in clusters)
				{
					double dist = abs(sqrt(((p->x - c->x)*(p->x - c->x)) + ((p->y - c->y)*(p->y - c->y))));
					if (dist < minim)
					{
						minim = dist;
						cc = c;
					}
				}
				p->parentCluster = cc;
			}

			update(); //redesenarea ferestrei (se apeleaza paintEvent())
			break;
		case Qt::RightButton:



			update();
			break;
		}
		i++;
	}