public void Start()
{
Pause();
_lastMilliseconds = 0;
_frames = 0;
if (!animationManager.Ticker.SystemEnabled)
{
FinishImmediately();
return;
}
_timer = animationManager.Insert(step =>
{
if (step == long.MaxValue)
{
// We're being forced to finish
Value = 1.0;
}
else
{
long ms = step + _lastMilliseconds;
Value = Math.Min(1.0f, ms / (double)Length);
_lastMilliseconds = ms;
}
long wantedFrames = (_lastMilliseconds / Rate) + 1;
if (wantedFrames > _frames || Value >= 1.0f)
{
ValueUpdated?.Invoke(this, EventArgs.Empty);
}
_frames = wantedFrames;
if (Value >= 1.0f)
{
if (Loop)
{
_lastMilliseconds = 0;
Value = 0.0f;
return(true);
}
Finished?.Invoke(this, EventArgs.Empty);
Value = 0.0f;
_timer = 0;
return(false);
}
return(true);
});
if (!animationManager.Ticker.IsRunning)
{
animationManager.Ticker.Start();
}
}
static void AnimateKineticInternal(IAnimatable self, IAnimationManager animationManager, string name, Func <double, double, bool> callback, double velocity, double drag, Action finished = null)
{
var key = new AnimatableKey(self, name);
AbortKinetic(key);
double sign = velocity / Math.Abs(velocity);
velocity = Math.Abs(velocity);
int tick = 0;
tick = animationManager.Insert(step =>
{
long ms = step;
velocity -= drag * ms;
velocity = Math.Max(0, velocity);
var result = false;
if (velocity > 0)
{
result = callback(sign * velocity * ms, velocity);
}
if (!result)
{
finished?.Invoke();
s_kinetics.Remove(key);
animationManager.Remove(tick);
}
return(result);
});
s_kinetics[key] = tick;
if (!animationManager.Ticker.IsRunning)
{
animationManager.Ticker.Start();
}
}