internal static ChangeArgs ViewModelPropertyChanged(
IVMPropertyDescriptor property,
ValueStage stage,
IViewModel oldValue,
IViewModel newValue,
IChangeReason reason = null
)
{
var oldItems = oldValue != null ?
new[] { oldValue } :
null;
var newItems = newValue != null ?
new[] { newValue } :
null;
return(new ChangeArgs(
ChangeType.PropertyChanged,
stage,
Path.Empty.Append(property),
oldItems: oldItems,
newItems: newItems,
reason: reason
)
{
ChangedProperty = property
}); // TODO: Remove
}
public virtual void NotifyPropertyChanged(IBehaviorContext context, ValueStage stage, TValue oldValue, TValue newValue)
{
var args = ChangeArgs.PropertyChanged(
_property, stage,
reason: null
);
context.NotifyChange(args);
this.NotifyPropertyChangedNext(context, stage, oldValue, newValue);
}
internal static ChangeArgs PropertyChanged(IVMPropertyDescriptor property, ValueStage stage, IChangeReason reason = null)
{
Check.NotNull(property, nameof(property));
return(new ChangeArgs(
ChangeType.PropertyChanged,
stage,
Path.Empty.Append(property),
reason: reason
)
{
ChangedProperty = property
}); // TODO: Remove
}
private ChangeArgs(
ChangeType changeType,
ValueStage stage,
IVMPropertyDescriptor changedProperty,
Path changedPath,
IChangeReason reason
)
{
ChangeType = changeType;
Stage = stage;
ChangedProperty = changedProperty;
ChangedPath = changedPath;
Reason = reason;
}
private ChangeArgs(
ChangeType changeType,
ValueStage stage,
Path changedPath,
IEnumerable <IViewModel> oldItems = null,
IEnumerable <IViewModel> newItems = null,
IChangeReason reason = null
)
{
ChangeType = changeType;
Stage = stage;
ChangedPath = changedPath;
OldItems = oldItems ?? Enumerable.Empty <IViewModel>();
NewItems = newItems ?? Enumerable.Empty <IViewModel>();
Reason = reason;
}
// TODO: Unify step/stage???
protected PropertyValidationSourceBehaviorBase(ValidationStep step, ValueStage stage)
{
_step = step;
_stage = stage;
}
internal static ChangeArgs ValidationResultChanged(IVMPropertyDescriptor property, ValueStage stage)
{
Check.NotNull(property, nameof(property));
return(new ChangeArgs(
ChangeType.ValidationResultChanged,
stage,
Path.Empty.Append(property)
));
}
