/// <summary>
/// Initializes a new instance of the <see cref="RegionChangedEventArgs"/> class.
/// </summary>
/// <param name="beforeChange">
/// A region with properties equivalent to those without the change.
/// </param>
/// <param name="afterChange">
/// A region with properties equivalent to those with the change.
/// </param>
/// <param name="changeTypes">
/// The types of changes encapsulated by this change event.
/// </param>
internal RegionChangedEventArgs(
IReadOnlyRegion beforeChange,
IReadOnlyRegion afterChange,
RegionChangeTypes changeTypes)
{
this.BeforeChange = beforeChange;
this.AfterChange = afterChange;
this.ChangeTypes = changeTypes;
}
private void MaybeRecalculate(Coord delta, RegionChangeTypes changeType)
{
this.AdjustInnerRegion();
if (changeType.HasFlag(RegionChangeTypes.Resize))
{
this.Recalculate();
}
else
{
this.namePlate.Region.TryTranslate(delta, out _);
this.topLeft.Region.TryTranslate(delta, out _);
this.topRight.Region.TryTranslate(delta, out _);
this.bottomLeft.Region.TryTranslate(delta, out _);
this.bottomRight.Region.TryTranslate(delta, out _);
this.leftStroke.Region.TryTranslate(delta, out _);
this.topStroke.Region.TryTranslate(delta, out _);
this.rightStroke.Region.TryTranslate(delta, out _);
this.bottomStroke.Region.TryTranslate(delta, out _);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="RegionChangedEventArgs"/> class.
/// </summary>
/// <param name="beforeChange">
/// A region with properties equivalent to those without the change.
/// </param>
/// <param name="afterChange">
/// A region with properties equivalent to those with the change.
/// </param>
/// <exception cref="ArgumentNullException">
/// Thrown when <paramref name="beforeChange"/> or <paramref name="afterChange"/> is <see langword="null"/>.
/// </exception>
public RegionChangedEventArgs(
IReadOnlyRegion beforeChange,
IReadOnlyRegion afterChange)
{
this.BeforeChange = beforeChange ?? throw new ArgumentNullException(nameof(beforeChange));
this.AfterChange = afterChange ?? throw new ArgumentNullException(nameof(afterChange));
RegionChangeTypes changeTypes = default;
if (beforeChange.TopLeft != afterChange.TopLeft)
{
changeTypes |= RegionChangeTypes.Move;
}
if (beforeChange.MathHeight != afterChange.MathHeight ||
beforeChange.MathWidth != afterChange.MathWidth)
{
changeTypes |= RegionChangeTypes.Resize;
}
this.ChangeTypes = changeTypes;
}
