/// <summary>
/// 移除一个子项
/// </summary>
/// <param name="subItem">要移除的子项</param>
public void Remove(ChatListSubItem subItem)
{
int index = this.IndexOf(subItem);
if (-1 != index)
{
this.RemoveAt(index);
}
}
public override object ConvertTo(
ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("DestinationType cannot be null");
}
//MessageBox.Show("Convertto OK");
if (destinationType == typeof(InstanceDescriptor) && (value is ChatListItem))
{
ConstructorInfo constructor = null;
var item = (ChatListItem)value;
ChatListSubItem[] subItems = null;
//MessageBox.Show("Convertto Start Item:" + item.Text);
//MessageBox.Show("Item.SubItems.Count:" + item.SubItems.Count);
if (item.SubItems.Count > 0)
{
subItems = new ChatListSubItem[item.SubItems.Count];
item.SubItems.CopyTo(subItems, 0);
}
//MessageBox.Show("Item.SubItems.Count:" + item.SubItems.Count);
if (item.Text != null && subItems != null)
{
constructor =
typeof(ChatListItem).GetConstructor(new[] { typeof(string), typeof(ChatListSubItem[]) });
}
//MessageBox.Show("Constructor(Text,item[]):" + (constructor != null));
if (constructor != null)
{
return(new InstanceDescriptor(constructor, new object[] { item.Text, subItems }, false));
}
if (subItems != null)
{
constructor = typeof(ChatListItem).GetConstructor(new[] { typeof(ChatListSubItem[]) });
}
if (constructor != null)
{
return(new InstanceDescriptor(constructor, new object[] { subItems }, false));
}
if (item.Text != null)
{
//MessageBox.Show("StartGetConstructor(text)");
constructor = typeof(ChatListItem).GetConstructor(new[] { typeof(string), typeof(bool) });
}
//MessageBox.Show("Constructor(Text):" + (constructor != null));
if (constructor != null)
{
//System.Windows.Forms.MessageBox.Show("text OK");
return(new InstanceDescriptor(constructor, new object[] { item.Text, item.IsOpen }));
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
private void EnsureSpace(int elements)
{
if (this.m_arrSubItems == null)
{
this.m_arrSubItems = new ChatListSubItem[Math.Max(elements, 4)];
}
else if (elements + this.count > this.m_arrSubItems.Length)
{
var arrTemp = new ChatListSubItem[Math.Max(this.m_arrSubItems.Length * 2, elements + this.count)];
this.m_arrSubItems.CopyTo(arrTemp, 0);
this.m_arrSubItems = arrTemp;
}
}
/// <summary>
/// 根据在线状态添加一个子项
/// </summary>
/// <param name="subItem">要添加的子项</param>
public void AddAccordingToStatus(ChatListSubItem subItem)
{
if (subItem.Status == ChatListSubItem.UserStatus.OffLine)
{
this.Add(subItem);
return;
}
for (int i = 0, len = this.count; i < len; i++)
{
if (subItem.Status <= this.m_arrSubItems[i].Status)
{
this.Insert(i, subItem);
return;
}
}
this.Add(subItem);
}
/// <summary>
/// 添加一个子项
/// </summary>
/// <param name="subItem">要添加的子项</param>
public void Add(ChatListSubItem subItem)
{
if (subItem == null)
{
throw new ArgumentNullException("SubItem cannot be null");
}
this.EnsureSpace(1);
if (-1 == this.IndexOf(subItem))
{
subItem.OwnerListItem = this.owner;
this.m_arrSubItems[this.count++] = subItem;
if (this.owner.OwnerChatListBox != null)
{
this.owner.OwnerChatListBox.Invalidate();
}
}
}
/// <summary>
/// 根据索引插入一个子项
/// </summary>
/// <param name="index">索引位置</param>
/// <param name="subItem">要插入的子项</param>
public void Insert(int index, ChatListSubItem subItem)
{
if (index < 0 || index >= this.count)
{
throw new IndexOutOfRangeException("Index was outside the bounds of the array");
}
if (subItem == null)
{
throw new ArgumentNullException("SubItem cannot be null");
}
this.EnsureSpace(1);
for (int i = this.count; i > index; i--)
{
this.m_arrSubItems[i] = this.m_arrSubItems[i - 1];
}
subItem.OwnerListItem = this.owner;
this.m_arrSubItems[index] = subItem;
this.count++;
if (this.owner.OwnerChatListBox != null)
{
this.owner.OwnerChatListBox.Invalidate();
}
}
/// <summary>
/// 获取索引位置
/// </summary>
/// <param name="subItem">要获取索引的子项</param>
/// <returns>索引</returns>
public int IndexOf(ChatListSubItem subItem)
{
return(Array.IndexOf(this.m_arrSubItems, subItem));
}
/// <summary>
/// 判断子项是否在集合内
/// </summary>
/// <param name="subItem">要判断的子项</param>
/// <returns>是否在集合内</returns>
public bool Contains(ChatListSubItem subItem)
{
return(this.IndexOf(subItem) != -1);
}
