[Qt-interest] polyline gets modified after translation

[Samuel Rødal]

Sujan Dasmahapatra wrote:
> I  draw a graphicsitems polyline which take the arguments as number of 
> points and point list. Now after I do a translation on the graphics 
> items do the pointlist gets modified ?
> 
> My *Geometry* class has  members  *noOfPoints* and *QPointF *points*;
> 
> ////////////////////////////////////////////////////////////////////////////////////////////////////////////
> 
> class Geometry:public QGraphicsItem
> 
> {
> 
>                 Q_Object
> 
> public:
> 
>                 int noOfPoints;
> 
>                 QPointF *points;
> 
> };
> 
> Now in Geometry class in the paint method  I draw the polyline .
> 
> Now I do a translation from on this geometry.
> 
> /////////////////////////////////////////////////////////////////////////////////////////
> 
> Geometry *geometry;
> 
> geometry->translate(dx,dy);
> 
>  
> 
> Now  after translation would my Geometry class’s *points *get modified 
> ??????????
> 
> Can I take those points as the new set of coordinates  for Geometry.
> 
> ////////////////////////////////////////////////////////////////////////////////////////////////////////////
> 
> If you don’t understand please ask me.

QGraphicsItem::translate() and the other transformation functions will 
just initialize the painter that gets sent to the graphics item's 
paint() method with a different world transformation.

--
Samuel