/// <summary>
/// Dynamically change this Expression sources (availiable only for NonShareable
/// Expressions)
/// </summary>
/// <remarks>
/// Expression must be in use on provided DependencyObject/DependencyProperty.
/// GetSources must reflect the old sources to be replaced by the provided newSources.
/// </remarks>
/// <param name="d">DependencyObject whose sources are to be updated</param>
/// <param name="dp">The property that the Expression is set to</param>
/// <param name="newSources">New sources</param>
internal void ChangeSources(DependencyObject d, DependencyProperty dp, DependencySource[] newSources)
{
if (d == null && !ForwardsInvalidations)
{
throw new ArgumentNullException("d");
}
if (dp == null && !ForwardsInvalidations)
{
throw new ArgumentNullException("dp");
}
if (Shareable)
{
throw new InvalidOperationException(SR.Get(SRID.ShareableExpressionsCannotChangeSources));
}
DependencyObject.ValidateSources(d, newSources, this);
// Additional validation in callee
if (ForwardsInvalidations)
{
DependencyObject.ChangeExpressionSources(this, null, null, newSources);
}
else
{
DependencyObject.ChangeExpressionSources(this, d, dp, newSources);
}
}
internal void ChangeSources(DependencyObject d, DependencyProperty dp, DependencySource[] newSources)
{
if (d == null && !this.ForwardsInvalidations)
{
throw new ArgumentNullException("d");
}
if (dp == null && !this.ForwardsInvalidations)
{
throw new ArgumentNullException("dp");
}
if (this.Shareable)
{
throw new InvalidOperationException("ShareableExpressionsCannotChangeSources");
}
DependencyObject.ValidateSources(d, newSources, this);
if (this.ForwardsInvalidations)
{
DependencyObject.ChangeExpressionSources(this, null, null, newSources);
return;
}
DependencyObject.ChangeExpressionSources(this, d, dp, newSources);
}