/// <summary>
/// Searches for a resource with the specified key, and returns that resource, if found and of type specified type.
/// </summary>
/// <typeparam name="T">The return type of the resource.</typeparam>
/// <param name="application">The <see cref="Application" /> to search in.</param>
/// <param name="key">The name of the resource to find.</param>
/// <returns>
/// The found resource, or <see langword="default" />(<typeparamref name="T" />), if no resource with the provided key is found or it does not match the specified type.
/// </returns>
public static T TryFindResource <T>(this Application application, object key)
{
Check.ArgumentNull(application, nameof(application));
Check.ArgumentNull(key, nameof(key));
return(CSharp.CastOrDefault <T>(application.TryFindResource(key)));
}
/// <summary>
/// Searches for a resource with the specified key, and returns that resource, if found and of type specified type.
/// </summary>
/// <typeparam name="T">The return type of the resource.</typeparam>
/// <param name="frameworkElement">The <see cref="FrameworkElement" /> to search in.</param>
/// <param name="key">The key identifier of the resource to be found.</param>
/// <returns>
/// The found resource, or <see langword="default" />(<typeparamref name="T" />), if no resource with the provided key is found or it does not match the specified type.
/// </returns>
public static T TryFindResource <T>(this FrameworkElement frameworkElement, object key)
{
Check.ArgumentNull(frameworkElement, nameof(frameworkElement));
Check.ArgumentNull(key, nameof(key));
return(CSharp.CastOrDefault <T>(frameworkElement.TryFindResource(key)));
}
/// <summary>
/// Method that can be used by the <see langword="get" /> accessor of a property. Backing fields are managed automatically.
/// <para>Example: <see langword="public" /> <see cref="int" /> Foo { <see langword="get" /> => Get(() => Foo, () => 1); <see langword="set" /> => Set(() => Foo, <see langword="value" />); }</para>
/// </summary>
/// <typeparam name="T">The type of the property.</typeparam>
/// <param name="property">The strongly typed lambda expression of the property.</param>
/// <param name="defaultValue">A <see cref="Func{TResult}" /> that retrieves a default value. This delegate can be used as a property initializer. <paramref name="defaultValue" /> is invoked, if the property is retrieved for the first time and is not set.</param>
/// <returns>
/// The value of the property backing field. The default value is <see langword="default" />(<typeparamref name="T" />).
/// </returns>
protected T Get <T>(Expression <Func <T> > property, Func <T> defaultValue)
{
Check.ArgumentNull(property, nameof(property));
string propertyName = property.GetMemberName();
if (!BackingFields.ContainsKey(propertyName))
{
BackingFields[propertyName] = defaultValue == null ? default : defaultValue();
}
return(CSharp.CastOrDefault <T>(BackingFields[propertyName]));
}
object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
TResult result = Convert(CSharp.CastOrDefault <TValue>(value));
return(Then == null ? result : Then.Convert(result, targetType, ThenParameter, culture));
}
/// <summary>
/// Compares two objects and returns an indication of their relative sort order. Specified <see cref="object" /> parameters that are not of the specified type are treated as <see langword="null" />.
/// </summary>
/// <param name="x">An <see cref="object" /> to compare to <paramref name="y" />.</param>
/// <param name="y">An <see cref="object" /> to compare to <paramref name="x" />.</param>
/// <returns>
/// A signed integer that indicates the relative values of <paramref name="x" /> and <paramref name="y" />.
/// </returns>
public int Compare(object x, object y)
{
return(Compare(CSharp.CastOrDefault <T>(x), CSharp.CastOrDefault <T>(y)));
}
