void SetValueActual(BindableProperty property, BindablePropertyContext context, object value, bool currentlyApplying, SetValueFlags attributes, bool silent = false)
{
object original = context.Value;
bool raiseOnEqual = (attributes & SetValueFlags.RaiseOnEqual) != 0;
bool clearDynamicResources = (attributes & SetValueFlags.ClearDynamicResource) != 0;
bool clearOneWayBindings = (attributes & SetValueFlags.ClearOneWayBindings) != 0;
bool clearTwoWayBindings = (attributes & SetValueFlags.ClearTwoWayBindings) != 0;
bool same = Equals(value, original);
if (!silent && (!same || raiseOnEqual))
{
if (property.PropertyChanging != null)
{
property.PropertyChanging(this, original, value);
}
OnPropertyChanging(property.PropertyName);
}
if (!same || raiseOnEqual)
{
context.Value = value;
}
context.Attributes &= ~BindableContextAttributes.IsDefaultValue;
if ((context.Attributes & BindableContextAttributes.IsDynamicResource) != 0 && clearDynamicResources)
{
RemoveDynamicResource(property);
}
BindingBase binding = context.Binding;
if (binding != null)
{
if (clearOneWayBindings && binding.GetRealizedMode(property) == BindingMode.OneWay || clearTwoWayBindings && binding.GetRealizedMode(property) == BindingMode.TwoWay)
{
RemoveBinding(property, context);
binding = null;
}
}
if (!silent && (!same || raiseOnEqual))
{
if (binding != null && !currentlyApplying)
{
_applying = true;
binding.Apply(true);
_applying = false;
}
OnPropertyChanged(property.PropertyName);
if (property.PropertyChanged != null)
{
property.PropertyChanged(this, original, value);
}
}
}
void ClearValue(BindableProperty property, bool checkaccess)
{
if (property == null)
{
throw new ArgumentNullException("property");
}
if (checkaccess && property.IsReadOnly)
{
throw new InvalidOperationException(string.Format("The BindableProperty \"{0}\" is readonly.", property.PropertyName));
}
BindablePropertyContext bpcontext = GetContext(property);
if (bpcontext == null)
{
return;
}
object original = bpcontext.Value;
object newValue = property.GetDefaultValue(this);
bool same = Equals(original, newValue);
if (!same)
{
if (property.PropertyChanging != null)
{
property.PropertyChanging(this, original, newValue);
}
OnPropertyChanging(property.PropertyName);
}
bpcontext.Attributes &= ~BindableContextAttributes.IsManuallySet;
bpcontext.Value = newValue;
bpcontext.Attributes |= BindableContextAttributes.IsDefaultValue;
if (!same)
{
OnPropertyChanged(property.PropertyName);
if (property.PropertyChanged != null)
{
property.PropertyChanged(this, original, newValue);
}
}
}
