public void OnElementSelectorKeyChanged(RadElement element, RadPropertyChangedEventArgs changeArgs)
{
if (changeArgs.Property == RadItem.VisualStateProperty && !this.hasVisualSelectors)
{
return;
}
string oldSelectorValue = changeArgs.OldValue as string;
int oldSelectorKey = -1;
Debug.Assert(oldSelectorValue != null);
//TODO: decouple
if (changeArgs.Property == RadElement.ClassProperty)
{
oldSelectorKey = ClassSelector.GetSelectorKey(oldSelectorValue);
}
else if (changeArgs.Property == RadItem.VisualStateProperty)
{
oldSelectorKey = VisualStateSelector.GetSelectorKey(oldSelectorValue);
}
IEnumerable <StylesheetTreeNode> nodeList = null;
if (oldSelectorKey != -1)
{
//Optimization
LinkedList <StylesheetTreeNode> mappedNodes;
if (this.nodesByKey.TryGetValue(oldSelectorKey, out mappedNodes))
{
nodeList = mappedNodes;
}
}
else
{
nodeList = this.RootNode.Nodes;
}
if (nodeList != null)
{
//TODO: optimization possible
//Detach element should traverse the element tree and prepare cache for AttachElement call later
foreach (StylesheetTreeNode node in nodeList)
{
node.DetachElement(element);
}
}
this.AttachElement(element);
}
public ICollection <StylesheetTreeNode> FindNodes(RadElement element)
{
//TODO too coupled to RadElement and its properties
LinkedList <StylesheetTreeNode> result = new LinkedList <StylesheetTreeNode>();
if (nodes == null)
{
return(result);
}
RadItem item = element as RadItem;
StylesheetTreeNode foundNode;
if (item != null && item.StateManager != null /*&& !string.IsNullOrEmpty(item.VisualState)*/)
{
//Opptimization for Old themes
if (this.hasVisualStateSelectors)
{
foreach (string itemState in item.StateManager.GetStateFallbackList(item))
{
if (this.nodes.TryGetValue(VisualStateSelector.GetSelectorKey(itemState), out foundNode))
{
result.AddLast(foundNode);
break;
}
}
}
}
if (!string.IsNullOrEmpty(element.Class))
{
if (this.nodes.TryGetValue(ClassSelector.GetSelectorKey(element.Class), out foundNode))
{
result.AddLast(foundNode);
}
}
if (!string.IsNullOrEmpty(element.Name) && this.nodes.TryGetValue(NameSelector.GetSelectorKey(element.Name), out foundNode))
{
result.AddLast(foundNode);
}
if (this.nodes.TryGetValue(element.GetThemeEffectiveType().GetHashCode(), out foundNode))
{
result.AddLast(foundNode);
}
return(result);
}