private static void OnPropertyChangedCommand(ICommandSource <PropertyChangedEventArgs> source, ICommandState state)
{
if (!source.EventArgs.PropertyName.In(state.GetValueOrDefault <string[]>(statePropertyNames)))
{
return;
}
state.GetValueOrDefault <Action>(stateHandler)?.Invoke();
}
private static void OnUpdatePropertyCommand(ICommandSource src, ICommandState state, object target)
{
string sourcePropertyName = state.GetValueOrDefault <string>(stateSourcePropertyName);
if (sourcePropertyName == null)
{
Throw.InvalidOperationException(Res.ComponentModelMissingState(stateSourcePropertyName));
}
string targetPropertyName = state.GetValueOrDefault <string>(stateTargetPropertyName);
if (targetPropertyName == null)
{
Throw.InvalidOperationException(Res.ComponentModelMissingState(stateTargetPropertyName));
}
object propertyValue = null;
bool propertyValueObtained = false;
if (src.EventArgs is PropertyChangedEventArgs e)
{
if (e.PropertyName != sourcePropertyName)
{
return;
}
propertyValueObtained = e.TryGetNewPropertyValue(out propertyValue);
}
if (!propertyValueObtained)
{
object source = src.Source;
propertyValue = source is IPersistableObject persistableSource && persistableSource.TryGetPropertyValue(sourcePropertyName, out propertyValue) ||
source is ICommandState stateSource && stateSource.TryGetValue(sourcePropertyName, out propertyValue)
? propertyValue : Reflector.GetProperty(source, sourcePropertyName);
}
var formatValue = state.GetValueOrDefault <Func <object, object> >(stateFormatValue);
if (formatValue != null)
{
propertyValue = formatValue.Invoke(propertyValue);
}
switch (target)
{
case IPersistableObject persistableTarget:
persistableTarget.SetProperty(targetPropertyName, propertyValue);
break;
case ICommandState stateTarget:
stateTarget[targetPropertyName] = propertyValue;
break;
default:
Reflector.SetProperty(target, targetPropertyName, propertyValue);
break;
}
}