/// <summary>
/// If the DO is frozen, we'll return our frozen sentinel. Otherwise we'll make
/// an unfrozen copy.
/// </summary>
internal override object CreateDefaultValue(DependencyObject owner, DependencyProperty property)
{
Debug.Assert(owner != null && property != null,
"It is the caller responsibility to ensure that owner and property are non-null.");
Freezable result = _defaultValuePrototype;
Freezable ownerFreezable = owner as Freezable;
// If the owner is frozen, just return the frozen prototype.
if (ownerFreezable != null && ownerFreezable.IsFrozen)
{
return(result);
}
result = _defaultValuePrototype.Clone();
// Wire up a FreezableDefaultPromoter to observe the default value we
// just created and automatically promote it to local if it is modified.
FreezableDefaultPromoter promoter = new FreezableDefaultPromoter(owner, property);
promoter.SetFreezableDefaultValue(result);
result.Changed += promoter.OnDefaultValueChanged;
return(result);
}
/// <summary>
/// If the DO is frozen, we'll return our frozen sentinel. Otherwise we'll make
/// an unfrozen copy.
/// </summary>
internal override object CreateDefaultValue(DependencyObject owner, DependencyProperty property)
{
Debug.Assert(owner != null && property != null,
"It is the caller responsibility to ensure that owner and property are non-null.");
Freezable result = _defaultValuePrototype;
Freezable ownerFreezable = owner as Freezable;
// If the owner is frozen, just return the frozen prototype.
if (ownerFreezable != null && ownerFreezable.IsFrozen)
{
return result;
}
result = _defaultValuePrototype.Clone();
// Wire up a FreezableDefaultPromoter to observe the default value we
// just created and automatically promote it to local if it is modified.
FreezableDefaultPromoter promoter = new FreezableDefaultPromoter(owner, property);
promoter.SetFreezableDefaultValue(result);
result.Changed += promoter.OnDefaultValueChanged;
return result;
}
