LanguageEntries are now removed from the grid if both languageFiles contain null or empty value for it

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@1903 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

GreenshotLanguageEditor/ObservableDictionary.cs

@@ -0,0 +1,257 @@
+using System;
+using System.Linq;
+using System.ComponentModel;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+ 
+namespace System.Collections.ObjectModel
+{
+  public class ObservableDictionary<TKey, TValue> : IDictionary<TKey, TValue>, INotifyCollectionChanged, INotifyPropertyChanged
+  {
+    private const string CountString = "Count";
+    private const string IndexerName = "Item[]";
+    private const string KeysName = "Keys";
+    private const string ValuesName = "Values";
+
+    private IDictionary<TKey, TValue> _Dictionary;
+    protected IDictionary<TKey, TValue> Dictionary
+    {
+      get { return _Dictionary; }
+    }
+ 
+    #region Constructors
+    public ObservableDictionary()
+    {
+      _Dictionary = new Dictionary<TKey, TValue>();
+    }
+    public ObservableDictionary(IDictionary<TKey, TValue> dictionary)
+    {
+      _Dictionary = new Dictionary<TKey, TValue>(dictionary);
+    }
+    public ObservableDictionary(IEqualityComparer<TKey> comparer)
+    {
+      _Dictionary = new Dictionary<TKey, TValue>(comparer);
+    }
+    public ObservableDictionary(int capacity)
+    {
+      _Dictionary = new Dictionary<TKey, TValue>(capacity);
+    }
+    public ObservableDictionary(IDictionary<TKey, TValue> dictionary, IEqualityComparer<TKey> comparer)
+    {
+      _Dictionary = new Dictionary<TKey, TValue>(dictionary, comparer);
+    }
+    public ObservableDictionary(int capacity, IEqualityComparer<TKey> comparer)
+    {
+      _Dictionary = new Dictionary<TKey, TValue>(capacity, comparer);
+    }
+    #endregion
+ 
+    #region IDictionary<TKey,TValue> Members
+ 
+    public void Add(TKey key, TValue value)
+    {
+      Insert(key, value, true);
+    }
+ 
+    public bool ContainsKey(TKey key)
+    {
+      return Dictionary.ContainsKey(key);
+    }
+ 
+    public ICollection<TKey> Keys
+    {
+      get { return Dictionary.Keys; }
+    }
+ 
+    public bool Remove(TKey key)
+    {
+      if (key == null) throw new ArgumentNullException("key");
+ 
+      TValue value;
+      Dictionary.TryGetValue(key, out value);
+      var removed = Dictionary.Remove(key);
+      if (removed)
+
+        //OnCollectionChanged(NotifyCollectionChangedAction.Remove, new KeyValuePair<TKey, TValue>(key, value));
+        OnCollectionChanged();
+
+      return removed;
+    }
+ 
+    public bool TryGetValue(TKey key, out TValue value)
+    {
+      return Dictionary.TryGetValue(key, out value);
+    }
+ 
+    public ICollection<TValue> Values
+    {
+      get { return Dictionary.Values; }
+    }
+ 
+    public TValue this[TKey key]
+    {
+      get
+      {
+        return Dictionary[key];
+      }
+      set
+      {
+        Insert(key, value, false);
+      }
+    }
+ 
+    #endregion
+ 
+    #region ICollection<KeyValuePair<TKey,TValue>> Members
+ 
+    public void Add(KeyValuePair<TKey, TValue> item)
+    {
+      Insert(item.Key, item.Value, true);
+    }
+ 
+    public void Clear()
+    {
+      if (Dictionary.Count > 0)
+      {
+        Dictionary.Clear();
+        OnCollectionChanged();
+      }
+    }
+ 
+    public bool Contains(KeyValuePair<TKey, TValue> item)
+    {
+      return Dictionary.Contains(item);
+    }
+ 
+    public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex)
+    {
+      Dictionary.CopyTo(array, arrayIndex);
+    }
+ 
+    public int Count
+    {
+      get { return Dictionary.Count; }
+    }
+ 
+    public bool IsReadOnly
+    {
+      get { return Dictionary.IsReadOnly; }
+    }
+ 
+    public bool Remove(KeyValuePair<TKey, TValue> item)
+    {
+      return Remove(item.Key);
+    }
+ 
+ 
+    #endregion
+ 
+    #region IEnumerable<KeyValuePair<TKey,TValue>> Members
+ 
+    public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
+    {
+      return Dictionary.GetEnumerator();
+    }
+ 
+    #endregion
+ 
+    #region IEnumerable Members
+ 
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+      return ((IEnumerable)Dictionary).GetEnumerator();
+    }
+ 
+    #endregion
+ 
+    #region INotifyCollectionChanged Members
+ 
+    public event NotifyCollectionChangedEventHandler CollectionChanged;
+ 
+    #endregion
+ 
+    #region INotifyPropertyChanged Members
+ 
+    public event PropertyChangedEventHandler PropertyChanged;
+ 
+    #endregion
+ 
+    public void AddRange(IDictionary<TKey, TValue> items)
+    {
+      if (items == null) throw new ArgumentNullException("items");
+ 
+      if (items.Count > 0)
+      {
+        if (Dictionary.Count > 0)
+        {
+          if (items.Keys.Any((k) => Dictionary.ContainsKey(k)))
+            throw new ArgumentException("An item with the same key has already been added.");
+          else
+            foreach (var item in items) Dictionary.Add(item);
+        }
+        else
+          _Dictionary = new Dictionary<TKey, TValue>(items);
+ 
+        OnCollectionChanged(NotifyCollectionChangedAction.Add, items.ToArray());
+      }                                                     
+    }
+ 
+    private void Insert(TKey key, TValue value, bool add)
+    {
+      if (key == null) throw new ArgumentNullException("key");
+ 
+      TValue item;
+      if (Dictionary.TryGetValue(key, out item))
+      {
+        if (add) throw new ArgumentException("An item with the same key has already been added.");
+        if (Equals(item, value)) return;
+        Dictionary[key] = value;
+
+        OnCollectionChanged(NotifyCollectionChangedAction.Replace, new KeyValuePair<TKey, TValue>(key, value), new KeyValuePair<TKey, TValue>(key, item));
+      }
+      else
+      {
+        Dictionary[key] = value;
+
+        OnCollectionChanged(NotifyCollectionChangedAction.Add, new KeyValuePair<TKey, TValue>(key, value));
+      }
+    }
+ 
+    private void OnPropertyChanged()
+    {
+      OnPropertyChanged(CountString);
+      OnPropertyChanged(IndexerName);
+      OnPropertyChanged(KeysName);
+      OnPropertyChanged(ValuesName);
+    }
+ 
+    protected virtual void OnPropertyChanged(string propertyName)
+    {
+      if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+    }
+ 
+    private void OnCollectionChanged()
+    {
+      OnPropertyChanged();
+      if (CollectionChanged != null) CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+    }
+ 
+    private void OnCollectionChanged(NotifyCollectionChangedAction action, KeyValuePair<TKey, TValue> changedItem)
+    {
+      OnPropertyChanged();
+      if (CollectionChanged != null) CollectionChanged(this, new NotifyCollectionChangedEventArgs(action, changedItem));
+    }
+ 
+    private void OnCollectionChanged(NotifyCollectionChangedAction action, KeyValuePair<TKey, TValue> newItem, KeyValuePair<TKey, TValue> oldItem)
+    {
+      OnPropertyChanged();
+      if (CollectionChanged != null) CollectionChanged(this, new NotifyCollectionChangedEventArgs(action, newItem, oldItem));
+    }
+ 
+    private void OnCollectionChanged(NotifyCollectionChangedAction action, IList newItems)
+    {
+      OnPropertyChanged();
+      if (CollectionChanged != null) CollectionChanged(this, new NotifyCollectionChangedEventArgs(action, newItems));
+    }
+  }
+}