/// <summary>
/// Gets the mouse handler presence for the view.
/// </summary>
/// <param name="view">The view.</param>
/// <param name="handlerMask">Affected handlers.</param>
/// <returns>
/// true if a any handler from the handlerMask is enabled on the view, false otherwise.
/// </returns>
public static bool GetMouseHandlerPresent(this object view, MouseHandlerMask handlerMask)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
if (s_properties.TryGetValue(view, out var elementData))
{
return((elementData.MouseHandlers & handlerMask) != 0);
}
return(false);
}
/// <summary>
/// Sets mouse handler presence for the view. Tracks multiple handlers, whereas the getter returns an "OR" value.
/// </summary>
/// <param name="view">The view.</param>
/// <param name="handlerMask">Affected handlers.</param>
/// <param name="handlerPresent">true if handler present, false otherwise.</param>
internal static void SetMouseHandlerPresent(this object view, MouseHandlerMask handlerMask, bool handlerPresent)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
var data = s_properties.GetOrAdd(view, (v) => new ViewData());
if (handlerPresent)
{
data.MouseHandlers |= handlerMask;
}
else
{
data.MouseHandlers &= ~handlerMask;
}
}
