/// <summary>
/// The value changed, and the method implemented from interface, this takes a <see cref="Subject"/> Abstraction
/// and prints the changed value. This method is crucial for the Observer pattern.
/// </summary>
/// <para>
/// Implemented as using push methodology, but doesn't directly use the internal state and only using it retrieve a
/// notification for a new update and passing itself to the output, therefore using the pull methodology instead.
/// </para>
/// <param name="value">This parameter is the internal state of the Subject received. This ensures that the Observer knows the state</param>
public void ValueChanged(Subject value)
{
// Checks global variable if notifications are allowed.
if (StockMarket.PortfolioNotifications)
{
PortfolioDisplay.PrintInformation(this);
}
}
public void ValueChanged(ISubject value)
{
PortfolioDisplay.PrintInformation(this);
}