Hi wysota,
My application is something like QPainter in MS where you can draw different kind of molecules (in chemistry term). The product is now to be ported to qt4. If I change the functionality (which is not a good idea) of drawing operations, I'll have tough time with my client.

The above sample program is the first step (where I should be able to draw two or more straight lines) to move forward.

I think you can understand my problem so please help me to achieve the same functionality as setRasterOp in qt3 performs.

Waiting eagerly for a reply....