QGraphicsSceneand others are simply fantastic ! I implemented today ticks and a grid for the plot using the neat trick of subclassing
QGraphicsViewand providing custom handlers for
drawForeground- so easy ! As a result, the code for the new plotting system is way more elegant than the old one (and more compact, although file size doesn't show it as it is also significantly more documented). Once again, many thanks to developers at Trolltech for their wonderful work !