public void Animate(Control control, Point motion, int duration)
{
if (motion == Point.Empty)
{
return;
}
ControlAnimation anim = new ControlAnimation(control, control.Location, motion, duration);
anim.StartTime = DateTime.Now;
animations.Add(anim);
if (!timer.Enabled)
{
timer.Enabled = true;
}
}
private bool AnimateControl(ControlAnimation anim)
{
double span = (DateTime.Now - anim.StartTime).TotalMilliseconds;
double timePosition = span / anim.Duration;
if (timePosition > 1.0)
{
timePosition = 1.0;
}
// Quartic easing in.
double factor = timePosition * timePosition * timePosition * timePosition;
Point shift = anim.Motion.Scale(factor, factor);
anim.Control.Location = anim.Start.Translate(shift.X, shift.Y);
return(timePosition < 1.0);
}