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using System;
using System.ComponentModel;
using FarsiLibrary.Win.Helpers;
namespace FarsiLibrary.Win
{
public class FATabStripItemCollection : CollectionWithEvents
{
#region Fields
[Browsable(false)]
public event CollectionChangeEventHandler CollectionChanged;
private int lockUpdate;
#endregion
#region Ctor
public FATabStripItemCollection()
{
lockUpdate = 0;
}
#endregion
#region Props
public FATabStripItem this[int index]
{
get
{
if (index < 0 || List.Count - 1 < index)
return null;
return (FATabStripItem)List[index];
}
set
{
List[index] = value;
}
}
[Browsable(false)]
public virtual int DrawnCount
{
get
{
int count = Count, res = 0;
if (count == 0) return 0;
for (int n = 0; n < count; n++)
{
if (this[n].IsDrawn)
res++;
}
return res;
}
}
public virtual FATabStripItem LastVisible
{
get
{
for (int n = Count - 1; n > 0; n--)
{
if (this[n].Visible)
return this[n];
}
return null;
}
}
public virtual FATabStripItem FirstVisible
{
get
{
for (int n = 0; n < Count; n++)
{
if (this[n].Visible)
return this[n];
}
return null;
}
}
[Browsable(false)]
public virtual int VisibleCount
{
get
{
int count = Count, res = 0;
if (count == 0) return 0;
for (int n = 0; n < count; n++)
{
if (this[n].Visible)
res++;
}
return res;
}
}
#endregion
#region Methods
protected virtual void OnCollectionChanged(CollectionChangeEventArgs e)
{
if (CollectionChanged != null)
CollectionChanged(this, e);
}
protected virtual void BeginUpdate()
{
lockUpdate++;
}
protected virtual void EndUpdate()
{
if (--lockUpdate == 0)
OnCollectionChanged(new CollectionChangeEventArgs(CollectionChangeAction.Refresh, null));
}
public virtual void AddRange(FATabStripItem[] items)
{
BeginUpdate();
try
{
foreach (FATabStripItem item in items)
{
List.Add(item);
}
}
finally
{
EndUpdate();
}
}
public virtual void Assign(FATabStripItemCollection collection)
{
BeginUpdate();
try
{
Clear();
for (int n = 0; n < collection.Count; n++)
{
FATabStripItem item = collection[n];
FATabStripItem newItem = new FATabStripItem();
newItem.Assign(item);
Add(newItem);
}
}
finally
{
EndUpdate();
}
}
public virtual int Add(FATabStripItem item)
{
int res = IndexOf(item);
if (res == -1) res = List.Add(item);
return res;
}
public virtual void Remove(FATabStripItem item)
{
if (List.Contains(item))
List.Remove(item);
}
public virtual FATabStripItem MoveTo(int newIndex, FATabStripItem item)
{
int currentIndex = List.IndexOf(item);
if (currentIndex >= 0)
{
RemoveAt(currentIndex);
Insert(0, item);
return item;
}
return null;
}
public virtual int IndexOf(FATabStripItem item)
{
return List.IndexOf(item);
}
public virtual bool Contains(FATabStripItem item)
{
return List.Contains(item);
}
public virtual void Insert(int index, FATabStripItem item)
{
if (Contains(item)) return;
List.Insert(index, item);
}
protected override void OnInsertComplete(int index, object item)
{
FATabStripItem itm = item as FATabStripItem;
itm.Changed += new EventHandler(OnItem_Changed);
OnCollectionChanged(new CollectionChangeEventArgs(CollectionChangeAction.Add, item));
}
protected override void OnRemove(int index, object item)
{
base.OnRemove(index, item);
FATabStripItem itm = item as FATabStripItem;
itm.Changed -= new EventHandler(OnItem_Changed);
OnCollectionChanged(new CollectionChangeEventArgs(CollectionChangeAction.Remove, item));
}
protected override void OnClear()
{
if (Count == 0) return;
BeginUpdate();
try
{
for (int n = Count - 1; n >= 0; n--)
{
RemoveAt(n);
}
}
finally
{
EndUpdate();
}
}
protected virtual void OnItem_Changed(object sender, EventArgs e)
{
OnCollectionChanged(new CollectionChangeEventArgs(CollectionChangeAction.Refresh, sender));
}
#endregion
}
}
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