protected override XenWidget BuildTree(VisualElement childView, XenWidget parentWidget)
{
/*
* 1. Return parent widget if child view is null.
* Since, We won't be able to create a XenWidget out of the view.
*/
if (childView == null)
{
return(parentWidget);
}
/*
* 2. Create a XenWidget for the child view.
*/
var childWidget = CreateXenWidget(childView, parentWidget);
parentWidget.Children.Add(childWidget);
if (ElementHelper.HasContentProperty(childView))
{
childWidget.AllowsManyChildren = ElementHelper.ContentPropertyAllowsManyChildren(childView);
childWidget.IsContentPropertyViewType = ElementHelper.IsContentPropertyView(childView);
childWidget.ContentPropertyTypeName = ElementHelper.GetContentPropertyTypeName(childView);
childWidget.HasContentProperty = true;
childWidget.IsLayout = false;
}
else
{
childWidget.HasContentProperty = false;
}
/*
* 3. Determine if the child view has children of it's own.
*/
var isParentView = childView as ILayoutController;
if (isParentView != null)
{
childWidget.IsLayout = true;
}
var grandchildren = isParentView?.Children;
if (grandchildren == null || grandchildren.Count == 0)
{
return(parentWidget);
}
/*
* 4. The child does have it's own children.
*/
foreach (var grandchild in grandchildren)
{
var view = grandchild as View;
if (view != null)
{
if (view is ILayoutController)
{
BuildTree(view, childWidget);
}
else
{
var grandchildWidget = CreateXenWidget(view, childWidget);
if (ElementHelper.HasContentProperty(view))
{
grandchildWidget.IsLayout = true;
}
childWidget.Children.Add(grandchildWidget);
}
}
}
return(parentWidget);
}
