public void TriggerPropertyChanged()
{
if (PropertyChangedEvent == null)
{
return;
}
LastPropGetter.TriggerPropertyChanged();
}
public CompositePathGetter
(
IEnumerable <IBindingPathLink <object> > pathLinks,
PropertyType defaultValue
)
{
_pathLinks = pathLinks;
_defaultValue = defaultValue;
if (pathLinks.IsNullOrEmpty())
{
PropGetters.Add(new SimplePropGetter <object>());
return;
}
IObjWithPropGetter <object> previousPropGetter = null;
foreach (var pathLink in _pathLinks)
{
IObjWithPropGetter <object> propGetter = pathLink.CreateGetter();
PropGetters.Add(propGetter);
if (previousPropGetter != null)
{
IObjWithPropGetter <object> thePreviousPropGetter = previousPropGetter;
previousPropGetter.PropertyChangedEvent += () =>
{
propGetter.TheObj = thePreviousPropGetter.GetPropValue();
};
}
previousPropGetter = propGetter;
}
previousPropGetter.PropertyChangedEvent += () =>
{
if (this.PropertyChangedEvent == null)
{
return;
}
if (!LastPropGetter.HasObj)
{
_cachedValue.TheValue = _defaultValue;
}
else
{
_cachedValue.TheValue = (PropertyType)LastPropGetter.GetPropValue();
}
PropertyChangedEvent?.Invoke();
};
}
void SetValueFromLastPropGetterValue()
{
if (!LastPropGetter.HasObj)
{
_cachedValue.TheValue = _defaultValue;
}
else
{
_cachedValue.TheValue = (PropertyType)LastPropGetter.GetPropValue();
}
}
