private static bool updateChildData(AnimatingPanelItemData data, double dampening, double attractionFactor, double variation)
{
if (data == null)
{
return(false);
}
else
{
Debug.Assert(dampening > 0 && dampening < 1);
Debug.Assert(attractionFactor > 0 && !double.IsInfinity(attractionFactor));
attractionFactor *= 1 + (variation * data.RandomSeed - .5);
Point newLocation;
Vector newVelocity;
bool anythingChanged =
GeoHelper.Animate(data.Current, data.LocationVelocity, data.Target,
attractionFactor, dampening, c_terminalVelocity, c_diff, c_diff,
out newLocation, out newVelocity);
data.Current = newLocation;
data.LocationVelocity = newVelocity;
var transformVector = data.Current - data.Target;
data.Transform.SetToVector(transformVector);
return(anythingChanged);
}
}
protected void ArrangeChild(UIElement child, Rect bounds)
{
m_listener.StartListening();
AnimatingPanelItemData data = (AnimatingPanelItemData)child.GetValue(DataProperty);
if (data == null)
{
data = new AnimatingPanelItemData();
child.SetValue(DataProperty, data);
Debug.Assert(child.RenderTransform == Transform.Identity);
child.RenderTransform = data.Transform;
data.Current = ProcessNewChild(child, bounds);
}
Debug.Assert(child.RenderTransform == data.Transform);
//set the location attached DP
data.Target = bounds.Location;
child.Arrange(bounds);
}
private static bool UpdateChildData(AnimatingPanelItemData data, double dampening, double attractionFactor,
double variation)
{
if (data == null)
{
return false;
}
else
{
Debug.Assert(dampening > 0 && dampening < 1);
Debug.Assert(attractionFactor > 0 && !double.IsInfinity(attractionFactor));
attractionFactor *= 1 + (variation * data.RandomSeed - .5);
Point newLocation;
Vector newVelocity;
bool anythingChanged =
GeoHelper.Animate(data.Current, data.LocationVelocity, data.Target,
attractionFactor, dampening, c_terminalVelocity, c_diff, c_diff,
out newLocation, out newVelocity);
data.Current = newLocation;
data.LocationVelocity = newVelocity;
Vector transformVector = data.Current - data.Target;
data.Transform.SetToVector(transformVector);
return anythingChanged;
}
}
protected void ArrangeChild(UIElement child, Rect bounds)
{
m_listener.StartListening();
var data = (AnimatingPanelItemData)child.GetValue(DataProperty);
if (data == null)
{
data = new AnimatingPanelItemData();
child.SetValue(DataProperty, data);
Debug.Assert(Equals(child.RenderTransform, Transform.Identity));
child.RenderTransform = data.Transform;
data.Current = ProcessNewChild(child, bounds);
}
Debug.Assert(Equals(child.RenderTransform, data.Transform));
//set the location attached DP
data.Target = bounds.Location;
child.Arrange(bounds);
}
