/// <summary>
/// Adds a bindable value to the current value and automatically wires up any dependencies.
/// </summary>
/// <param name="source">The source value to add.</param>
/// <param name="toAdd">To item to add.</param>
/// <returns>
/// A bindable value representing the sum of the two items.
/// </returns>
public static IBindable <long> Add(this IBindable <long> source, IBindable <long> toAdd)
{
return(source.Project(s => s + toAdd.Current, DependencyDiscovery.Enabled));
}
/// <summary>
/// Projects a single bindable object into another bindable object, using a lambda to select the new
/// type of object.
/// </summary>
/// <typeparam name="TSource">The type of the source.</typeparam>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <param name="source">The source colection.</param>
/// <param name="projector">The projector function used to turn the source type into the result type.</param>
/// <returns>
/// An object created by the <paramref name="projector"/>. If the source value changes, the item will be projected again.
/// </returns>
public static IBindable <TResult> Project <TSource, TResult>(this IBindable <TSource> source, Expression <Func <TSource, TResult> > projector)
{
return(source.Project(projector, DefaultDependencyAnalysis));
}
/// <summary>
/// Subtracts a bindable value from the current value and automatically wires up any dependencies.
/// </summary>
/// <param name="source">The source value to subtract.</param>
/// <param name="toSubtract">To item to subtract.</param>
/// <returns>
/// A bindable value representing the result of the two items.
/// </returns>
public static IBindable <long> Subtract(this IBindable <long> source, IBindable <long> toSubtract)
{
return(source.Project(s => s + toSubtract.Current, DependencyDiscovery.Enabled));
}
