[Qt-interest] How to update

[Sean Harmer]

On Thursday 02 Jul 2009 08:55:35 Sujan Dasmahapatra wrote:
> No Sean I need to update point[numberOfpoints] because I need those
> points to save the data points in file.
Ah sorry, you never specified this, so I assumed that you were only interested 
in drawing them.

In that case then you can add a function that calculates the position of your 
data in scene coordinates. To do this you can either use the 
QGraphicsItem::sceneTransform() and apply the transformation yourself, or you 
could use QPointF as a data type and call QGraphicsItem::mapToScene() on each 
point.

Hope this helps,

Sean