Migrando seu App do Windows Phone para o Windows 8 RC – DependencyObjectCollection
Se você utiliza a classe DependencyObjectCollection para criar listas de DependencyObjects em seus controles no Windows Phone, vai sentir falta dela no Windows 8.
Eu a utilizo no Wp7Tools para fazer uma attached property que mapeia eventos da View para actions no ViewModel, desacoplando os dois.
Caso você também precise, segue abaixo a implementação:
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public class DependencyObjectCollection<T> : DependencyObject, IList<T>, INotifyCollectionChanged where T : DependencyObject { private ObservableCollection<T> Items = new ObservableCollection<T>(); public DependencyObjectCollection() { Items.CollectionChanged += Items_CollectionChanged; } private void Items_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e) { OnCollectionChanged(e); } public void Add(T item) { Items.Add(item); } public void Clear() { Items.Clear(); } public bool Contains(T item) { return Contains(item); } public void CopyTo(T[] array, int arrayIndex) { Items.CopyTo(array, arrayIndex); } public int Count { get { return Items.Count; } } public bool IsReadOnly { get { return false; } } public bool Remove(T item) { return Items.Remove(item); } public IEnumerator<T> GetEnumerator() { return Items.GetEnumerator(); } IEnumerator IEnumerable.GetEnumerator() { return Items.GetEnumerator(); } public int IndexOf(T item) { return Items.IndexOf(item); } public void Insert(int index, T item) { Items.Insert(index, item); } public void RemoveAt(int index) { Items.RemoveAt(index); } public T this[int index] { get { return Items[index]; } set { Items[index] = value; } } public event NotifyCollectionChangedEventHandler CollectionChanged; private void OnCollectionChanged(NotifyCollectionChangedEventArgs args) { NotifyCollectionChangedEventHandler handler = CollectionChanged; if (handler != null) { handler(this, args); } } } |
Bom proveito :)
About
André Carlucci is the Director of Technology of Way2 Technology, Speaker, Microsoft MVP, Microsoft Regional Director, Intel Innovator, Intel Black Belt and DotNetFloripa and IoT usergroups organizer. He has 15 years of experience working on IT projects in Brazil and Europe. He is currently focused on software architecture and open-source projects. André is passionate about agile methodologies.
