/// <summary>
/// Write the given value onto a DependencyObject instance.
/// </summary>
/// <param name="instance">The DependencyObject on which to set the value.</param>
/// <param name="value">The value to set.</param>
public void SetValue(DependencyObject instance, T value)
{
if (instance != null)
{
EntryIndex entryIndex = instance.LookupEntry(_globalIndex);
// Set the value if it's not the default, otherwise remove the value.
if (!object.ReferenceEquals(value, _defaultValue))
{
instance.SetEffectiveValue(entryIndex, null /* dp */, _globalIndex, null /* metadata */, value, BaseValueSourceInternal.Local);
_hasBeenSet = true;
}
else
{
instance.UnsetEffectiveValue(entryIndex, null /* dp */, null /* metadata */);
}
}
else
{
throw new ArgumentNullException("instance");
}
}
/// <summary>
/// Sets all values saved in ItemValueStorage for the given item onto the container
/// </summary>
/// <param name="container"></param>
/// <param name="item"></param>
private void SetItemValuesOnContainer(DependencyObject container, object item, int[] dpIndices)
{
List<KeyValuePair<int, object>> itemValues = GetItemValues(item);
if (itemValues != null)
{
for (int i = 0; i < itemValues.Count; i++)
{
int dpIndex = itemValues[i].Key;
for (int j = 0; j < dpIndices.Length; j++)
{
if (dpIndex == dpIndices[j])
{
object value = itemValues[i].Value;
EntryIndex entryIndex = container.LookupEntry(dpIndex);
ModifiedItemValue modifiedItemValue = value as ModifiedItemValue;
DependencyProperty dp = DependencyProperty.RegisteredPropertyList.List[dpIndex];
if (modifiedItemValue == null)
{
// set as local value
if (dp != null)
{
// for real properties, call SetValue so that the property's
// change-callback is called
container.SetValue(dp, value);
}
else
{
// for "fake" properties (no corresponding DP - e.g. VSP's desired-size),
// set the property directly into the effective value table
container.SetEffectiveValue(entryIndex, null /*dp*/, dpIndex, null /*metadata*/, value, BaseValueSourceInternal.Local);
}
}
else if (modifiedItemValue.IsCoercedWithCurrentValue)
{
// set as current-value
container.SetCurrentValue(dp, modifiedItemValue.Value);
}
break;
}
}
}
}
}
