private void OnRendering(object sender, EventArgs eventArgs)
{
double dampening = Dampening;
double attractionFactor = Attraction * .01;
double variation = Variation;
bool hasChanges = false;
for (int i = 0; i < InternalChildren.Count; i++)
{
ItemAnimationData animationData = GetAnimationData(Children[i]);
if (animationData != null)
{
attractionFactor *= 1 + (variation * animationData.RandomSeed - .5);
Vector currentVelocity = animationData.LocationVelocity;
Point newLocation;
Vector newVelocity;
Vector diff = animationData.Offset;
if (diff.Length > MinimumValueDelta || currentVelocity.Length > MinimumValueDelta)
{
newVelocity = currentVelocity * (1 - dampening);
newVelocity += diff * attractionFactor;
if (currentVelocity.Length > TerminalVelocity)
{
newVelocity *= TerminalVelocity / currentVelocity.Length;
}
newLocation = animationData.Current + newVelocity;
hasChanges = true;
}
else
{
newLocation = animationData.Target;
newVelocity = new Vector();
}
animationData.Current = newLocation;
animationData.LocationVelocity = newVelocity;
Vector transformVector = animationData.Current - animationData.Target;
animationData.Transform.X = transformVector.X;
animationData.Transform.Y = transformVector.Y;
}
}
// Stop listening if no changes for all elements
if (!hasChanges)
{
renderingListener.StopListening();
}
}
private void OnRendering(object sender, EventArgs e)
{
ActiveTilePanel panel = Child as ActiveTilePanel;
if (panel == null)
{
return;
}
if (!ReferenceEquals(tilePanel, panel))
{
tilePanel = panel;
tilePanel.RenderTransform = traslateTransform;
}
int actualTargetIndex = Math.Max(0, Math.Min(tilePanel.Children.Count - 1, TargetIndex));
double targetPercentOffset = -actualTargetIndex / (double)tilePanel.Children.Count;
targetPercentOffset = targetPercentOffset.IsNaNValue() ? 0 : targetPercentOffset;
bool stopListening = !Animate(targetPercentOffset);
double targetPixelOffset = percentOffset * (RenderSize.Width * tilePanel.Children.Count);
traslateTransform.X = targetPixelOffset;
if (stopListening)
{
listener.StopListening();
}
}