I want to achieve is a function of a bullet fired, request the bullet can be extended as water lines, can be in effect, such as using graphical view framework,
Now I put every bullet as a Item, for each Item added an attribute animation, realize its mobile, then add more than one Item of animation to an animation group, implements a bullet or a list of bullets fired at the same time, now I want to control the animation group, according to time effect of complex, so how should I control the QParallelAnimationGroup?