public override Rect GetNextChildPlacement(UIElement child, TimeSpan currentTime,
Rect currentPlacement, Rect targetPlacement, AnimationPanel activeLayout,
AnimationRate animationRate, ref object placementArgs, out bool isDone)
{
var result = targetPlacement;
isDone = true;
if (_equation is not null)
{
var from = (Rect)placementArgs;
var duration = animationRate.Duration;
isDone = currentTime >= duration;
if (!isDone)
{
var x = _equation.Evaluate(currentTime, from.Left, targetPlacement.Left, duration);
var y = _equation.Evaluate(currentTime, from.Top, targetPlacement.Top, duration);
var width = Math.Max(0,
_equation.Evaluate(currentTime, from.Width, targetPlacement.Width, duration));
var height = Math.Max(0,
_equation.Evaluate(currentTime, from.Height, targetPlacement.Height, duration));
result = new Rect(x, y, width, height);
}
}
return(result);
}
public abstract Rect GetInitialChildPlacement(
UIElement child,
Rect currentPlacement,
Rect targetPlacement,
AnimationPanel activeLayout,
ref AnimationRate animationRate,
out object placementArgs,
out bool isDone);
public abstract Rect GetNextChildPlacement(
UIElement child,
TimeSpan currentTime,
Rect currentPlacement,
Rect targetPlacement,
AnimationPanel activeLayout,
AnimationRate animationRate,
ref object placementArgs,
out bool isDone);
public override Rect GetInitialChildPlacement(UIElement child, Rect currentPlacement,
Rect targetPlacement, AnimationPanel activeLayout, ref AnimationRate animationRate,
out object placementArgs, out bool isDone)
{
isDone = (animationRate.HasSpeed && animationRate.Speed <= 0) || (animationRate.HasDuration && animationRate.Duration.Ticks == 0);
if (!isDone)
{
Vector startVector = new Vector(currentPlacement.Left + (currentPlacement.Width / 2), currentPlacement.Top + (currentPlacement.Height / 2));
Vector finalVector = new Vector(targetPlacement.Left + (targetPlacement.Width / 2), targetPlacement.Top + (targetPlacement.Height / 2));
Vector distanceVector = startVector - finalVector;
animationRate = new AnimationRate(animationRate.HasDuration ? animationRate.Duration
: TimeSpan.FromMilliseconds(distanceVector.Length / animationRate.Speed));
}
placementArgs = currentPlacement;
return(currentPlacement);
}
public override Rect GetNextChildPlacement(UIElement child, TimeSpan currentTime, Rect currentPlacement, Rect targetPlacement, AnimationPanel activeLayout, AnimationRate animationRate, ref object placementArgs, out bool isDone)
{
throw new InvalidOperationException(ErrorMessages.GetMessage(ErrorMessages.DefaultAnimatorCantAnimate));
}
