void OnContentChanged()
{
if (_contentPresenter == null)
{
throw new InvalidOperationException("'ContentPresenter' element not found.");
}
_isContentChanging = true;
var content = Content;
if (content == null)
{
_isContentChanging = false;
_contentPresenter.InnerHTML = null;
return;
}
var frameworkElement = content as FrameworkElement;
if (frameworkElement != null)
{
if (_contentPresenter.LogicalChilderenCount == 1)
{
_contentPresenter.RemoveLogicalChild(_contentPresenter.GetLogicalChildAt(0));
}
if (_contentPresenter.VisualChilderenCount == 1)
{
_contentPresenter.RemoveVisualChild(_contentPresenter.GetVisualChildAt(0));
}
_contentPresenter.AddLogicalChild(frameworkElement);
if (LogicalChilderenCount == 1)
{
RemoveLogicalChild(GetLogicalChildAt(0));
}
AddLogicalChild(frameworkElement);
_isContentChanging = false;
return;
}
var contentAsString = content.ToString();
var textBlock = UIBuilder.Create <TextBlock>();
textBlock.Text = contentAsString;
_contentPresenter.AddLogicalChild(textBlock);
if (LogicalChilderenCount == 1)
{
RemoveLogicalChild(GetLogicalChildAt(0));
}
AddLogicalChild(textBlock);
_isContentChanging = false;
}