/// <summary>
/// Gets the layoutElement at a given location for an layoutElement and it's descendants.
/// If no layoutElement is at the location, returns null.
/// </summary>
/// <param name="layoutElement">root layoutElement to search from</param>
/// <param name="xPos">x position</param>
/// <param name="yPos">y position</param>
/// <returns></returns>
public ILayoutElement GetElementAtLocation(ILayoutElement layoutElement, float xPos, float yPos)
{
if (layoutElement == null)
{
return(null);
}
var absoluteBounds = layoutElement.Absolute(layoutElement.RectangleWithPadding);
// Check if click is in bounds.
if (absoluteBounds.ContainsPoint(xPos, yPos))
{
foreach (var child in layoutElement.Children.Reverse())
{
// Recursive check - attempt to resolve layoutElement clicked on for children.
var childResult = GetElementAtLocation(child, xPos, yPos);
if (childResult != null)
{
return(childResult);
}
}
// No child layoutElement clicked, so must be parent.
return(layoutElement);
}
// No layoutElement clicked on.
return(null);
}