/// <summary>
/// Find the first child of a specific type.
/// </summary>
/// <typeparam name="T">Expected type of the searched child</typeparam>
/// <param name="view"></param>
/// <param name="selector">Additional selector for the child</param>
/// <param name="childLevelLimit">Defines the max depth, null if not limit (Should never be used)</param>
/// <param name="includeCurrent">Indicates if the current view should also be tested or not.</param>
/// <returns></returns>
public static T FindFirstChild <T>(this ViewGroup view, Func <T, bool> selector, int?childLevelLimit = null, bool includeCurrent = true)
where T : View
{
Func <View, bool> childSelector;
if (selector == null)
{
childSelector = child => child is T;
}
else
{
childSelector = child =>
{
var t = child as T;
return(t != null && selector(t));
};
}
if (includeCurrent &&
childSelector(view))
{
return(view as T);
}
var maxDepth = childLevelLimit.HasValue
? childLevelLimit.Value
: Int32.MaxValue;
return((T)view.EnumerateAllChildren(childSelector, maxDepth).FirstOrDefault());
}
public static T?FindFirstChild <T>(this ViewGroup view, Func <T, bool>?selector, int?childLevelLimit = null, bool includeCurrent = true)
where T : View
{
Func <View?, bool> childSelector;
if (selector == null)
{
childSelector = child => child is T;
}
else
{
childSelector = child => child is T t && selector(t);
}
if (includeCurrent &&
childSelector(view))
{
return(view as T);
}
var maxDepth = childLevelLimit ?? int.MaxValue;
return((T?)view.EnumerateAllChildren(childSelector, maxDepth).FirstOrDefault());
}