/// <summary>
/// Inserts an element into the <see cref="T:System.Collections.ObjectModel.Collection`1" /> at the specified index.
/// </summary>
/// <param name="index">The zero-based index at which <paramref name="item" /> should be inserted.</param>
/// <param name="item">The object to insert.</param>
protected override void InsertItem(int index, Color item)
{
ColourCollectionEventArgs e;
int key;
base.InsertItem(index, item);
#if USENAMEHACK
this.SwatchNames.Insert(index, string.Empty);
#endif
key = item.ToArgb();
if (_indexedLookup != null && index == this.Count - 1 && !_indexedLookup.ContainsKey(key))
{
lock (_lock)
{
if (!_indexedLookup.ContainsKey(key))
{
_indexedLookup.Add(key, index);
}
}
}
else
{
_indexedLookup = null;
}
e = new ColourCollectionEventArgs(index, item);
this.OnItemInserted(e);
this.OnCollectionChanged(e);
}
/// <summary>
/// Removes the element at the specified index of the <see cref="T:System.Collections.ObjectModel.Collection`1" />.
/// </summary>
/// <param name="index">The zero-based index of the element to remove.</param>
protected override void RemoveItem(int index)
{
Color item;
ColourCollectionEventArgs e;
int key;
#if USENAMEHACK
this.SwatchNames.RemoveAt(index);
#endif
item = this[index];
key = item.ToArgb();
if (_indexedLookup != null && _indexedLookup.ContainsKey(key))
{
lock (_lock)
{
_indexedLookup.Remove(key);
}
}
base.RemoveItem(index);
e = new ColourCollectionEventArgs(index, item);
this.OnItemRemoved(e);
this.OnCollectionChanged(e);
}
/// <summary>
/// Raises the <see cref="ItemsCleared" /> event.
/// </summary>
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
protected virtual void OnItemsCleared(ColourCollectionEventArgs e)
{
EventHandler <ColourCollectionEventArgs> handler;
handler = this.ItemsCleared;
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// Removes all elements from the <see cref="T:System.Collections.ObjectModel.Collection`1" />.
/// </summary>
protected override void ClearItems()
{
ColourCollectionEventArgs e;
base.ClearItems();
_indexedLookup = null;
#if USENAMEHACK
this.SwatchNames.Clear();
#endif
e = new ColourCollectionEventArgs(-1, Color.Empty);
this.OnItemInserted(e);
this.OnCollectionChanged(e);
}
/// <summary>
/// Replaces the element at the specified index.
/// </summary>
/// <param name="index">The zero-based index of the element to replace.</param>
/// <param name="item">The new value for the element at the specified index.</param>
protected override void SetItem(int index, Color item)
{
Color oldItem;
oldItem = this[index];
if (oldItem != item)
{
ColourCollectionEventArgs e;
if (_indexedLookup != null)
{
int key;
int oldKey;
key = item.ToArgb();
oldKey = oldItem.ToArgb();
lock (_lock)
{
if (_indexedLookup.ContainsKey(oldKey))
{
_indexedLookup.Remove(oldKey);
}
if (!_indexedLookup.ContainsKey(key))
{
_indexedLookup.Add(key, index);
}
}
}
base.SetItem(index, item);
e = new ColourCollectionEventArgs(index, item);
this.OnItemReplaced(e);
this.OnCollectionChanged(e);
}
}