/// <summary>
/// When overridden in a derived class, gets the current value of the property on a component.
/// </summary>
/// <param name="component">The component with the property for which to retrieve the value.</param>
/// <returns>
/// The value of a property for a given component.
/// </returns>
public override object GetValue(object component)
{
// Have the property bag raise an event to get the current value of the property.
PropertySpecificationEventArgs e = new PropertySpecificationEventArgs(Specification, null);
ContainingBag.OnGetValue(e);
if (Specification != null)
{
if (e.Value == null)
{
if (Specification.DefaultValue != null)
{
e.Value = Specification.DefaultValue;
}
}
else
{
if (Specification.PropertyType.IsEnum)
{
Trap.trap();
e.Value = Enum.ToObject(Specification.PropertyType, e.Value);
}
}
}
return(e.Value);
}
/// <summary>
/// When overridden in a derived class, sets the value of the component to a different value.
/// </summary>
/// <param name="component">The component with the property value that is to be set.</param>
/// <param name="value">The new value.</param>
public override void SetValue(object component, object value)
{
// Have the property bag raise an event to set the current value of the property.
object valueToUse = value;
if (Specification != null)
{
if (Specification.PropertyType == typeof(string))
{
if (Specification.ConvertEmptyStringToNull && ((valueToUse as string) == string.Empty))
{
Trap.trap();
valueToUse = null;
}
}
else
{
if (Specification.PropertyType.IsEnum)
{
Trap.trap();
valueToUse = Convert.ToInt32(valueToUse);
}
}
}
PropertySpecificationEventArgs e = new PropertySpecificationEventArgs(Specification, valueToUse);
ContainingBag.OnSetValue(e);
}
/// <summary>
/// Raises the SetValue event, if ValueGetterFunc is left null, otherwise it will call ValueGetterFunc instead.
/// </summary>
/// <param name="e">A PropertySpecEventArgs that contains the event data.</param>
protected internal virtual void OnSetValue(PropertySpecificationEventArgs e)
{
if (this.ValueSetterFunc == null)
{
SetValue?.Invoke(this, e);
}
else
{
Trap.trap();
this.ValueSetterFunc(e.Property.Name, e.Value);
}
}
