public void SetValue(IBehaviorContext context, TValue value)
{
DetectValidationResultChange(
context,
delegate {
TValue previousChild = this.GetValueNext <TValue>(context);
// The former parent of 'previousChild' (= still the current value of the
// property) was already removed by the 'ViewModelInitializerBehavior'.
if (previousChild != null)
{
Revalidator.Revalidate(previousChild, ValidationScope.SelfAndLoadedDescendants);
}
this.SetValueNext(context, value);
// We MUST revalidate the value after updated the property value defined by
// ancestors would not match before (because the 'PathDefinition' calls
// 'GetValue' when matching paths). The drawback is that the new view model
// is not revalidated yet when 'PropertyChanged' is raised. If this becomes
// a problem, it would be possible to cache the new child VM temporarily and
// return it in 'GetValue' if one is cached.
if (value != null)
{
Revalidator.Revalidate(value, ValidationScope.SelfAndLoadedDescendants);
}
}
);
}
public void Revalidate(
IVMPropertyDescriptor property,
ValidationScope scope = ValidationScope.Self
)
{
Revalidator.RevalidatePropertyValidations(_vm, property, scope);
}
protected override void RevalidateDescendantsCore(IBehaviorContext context, ValidationScope scope)
{
var childVM = this.GetValueNext <TValue>(context);
if (childVM != null)
{
Revalidator.Revalidate(childVM, scope);
}
}
private void ValidateItems(IEnumerable <TItemVM> items)
{
var enumerableItems = (IEnumerable <IViewModel>)items;
Revalidator.RevalidateItems(
enumerableItems,
ValidationScope.SelfAndLoadedDescendants
);
}
internal void RefreshInternal(IVMPropertyDescriptor property, RefreshOptions options)
{
_descriptor.Behaviors.ViewModelRefreshNext(this, property, options);
// Refresh does not revalidate the property value itself. Descendants are
// automatically validated by the appropriate behaviors.
Revalidator.RevalidatePropertyValidations(
_vm,
property,
ValidationScope.Self
);
}
private void ValidateItem(IViewModel item)
{
Revalidator.Revalidate(item, ValidationScope.SelfAndLoadedDescendants);
}
internal void RefreshInternal(bool executeRefreshDependencies = false)
{
RefreshWithoutValidation(executeRefreshDependencies);
Revalidator.Revalidate(_vm, ValidationScope.SelfAndLoadedDescendants);
}
public void Revalidate(ValidationScope scope)
{
Revalidator.Revalidate(_vm, scope);
}
protected override void RevalidateDescendantsCore(IBehaviorContext context, ValidationScope scope)
{
var items = (IEnumerable <IViewModel>) this.GetValueNext <IVMCollection <TItemVM> >(context);
Revalidator.RevalidateItems(items, scope);
}
