/// <summary>
/// 根据索引位置插入一个列表项
/// </summary>
/// <param name="index">索引位置</param>
/// <param name="item">要插入的列表项</param>
public void Insert(int index, ChatListItem item)
{
if (index < 0 || index >= this.count)
{
throw new IndexOutOfRangeException("Index was outside the bounds of the array");
}
if (item == null)
{
throw new ArgumentNullException("Item cannot be null");
}
this.EnsureSpace(1);
for (int i = this.count; i > index; i--)
{
m_arrItem[i] = m_arrItem[i - 1];
}
item.OwnerChatListBox = this.owner;
m_arrItem[index] = item;
this.count++;
this.owner.Invalidate();
}
public ChatListSubItemCollection(ChatListItem owner)
{
this.owner = owner;
}
protected override void OnMouseMove(MouseEventArgs e)
{
m_ptMousePos = e.Location;
if (chatVScroll.IsMouseDown)
{ //如果滚动条的滑块处于被点击 那么移动
chatVScroll.MoveSliderFromLocation(e.Y);
return;
}
if (chatVScroll.ShouldBeDraw)
{ //如果控件上有滚动条 判断鼠标是否在滚动条区域移动
if (chatVScroll.Bounds.Contains(m_ptMousePos))
{
ClearItemMouseOn();
ClearSubItemMouseOn();
if (chatVScroll.SliderBounds.Contains(m_ptMousePos))
{
chatVScroll.IsMouseOnSlider = true;
}
else
{
chatVScroll.IsMouseOnSlider = false;
}
if (chatVScroll.UpBounds.Contains(m_ptMousePos))
{
chatVScroll.IsMouseOnUp = true;
}
else
{
chatVScroll.IsMouseOnUp = false;
}
if (chatVScroll.DownBounds.Contains(m_ptMousePos))
{
chatVScroll.IsMouseOnDown = true;
}
else
{
chatVScroll.IsMouseOnDown = false;
}
return;
}
else
{
chatVScroll.ClearAllMouseOn();
}
}
m_ptMousePos.Y += chatVScroll.Value; //如果不在滚动条范围类 那么根据滚动条当前值计算虚拟的一个坐标
for (int i = 0, Len = items.Count; i < Len; i++)
{ //然后判断鼠标是否移动到某一列表项或者子项
if (items[i].Bounds.Contains(m_ptMousePos))
{
if (items[i].IsOpen)
{ //如果展开 判断鼠标是否在某一子项上面
for (int j = 0, lenSubItem = items[i].SubItems.Count; j < lenSubItem; j++)
{
if (items[i].SubItems[j].Bounds.Contains(m_ptMousePos))
{
if (m_mouseOnSubItem != null)
{ //如果当前鼠标下子项不为空
if (items[i].SubItems[j].HeadRect.Contains(m_ptMousePos))
{ //判断鼠标是否在头像内
if (!m_bOnMouseEnterHeaded)
{ //如果没有触发进入事件 那么触发用户绑定的事件
OnMouseEnterHead(new ChatListEventArgs(this.m_mouseOnSubItem, this.selectSubItem));
m_bOnMouseEnterHeaded = true;
}
}
else
{
if (m_bOnMouseEnterHeaded)
{ //如果已经执行过进入事件 那触发用户绑定的离开事件
OnMouseLeaveHead(new ChatListEventArgs(this.m_mouseOnSubItem, this.selectSubItem));
m_bOnMouseEnterHeaded = false;
}
}
}
if (items[i].SubItems[j].Equals(m_mouseOnSubItem))
{
return;
}
ClearSubItemMouseOn();
ClearItemMouseOn();
m_mouseOnSubItem = items[i].SubItems[j];
this.Invalidate(new Rectangle(
m_mouseOnSubItem.Bounds.X, m_mouseOnSubItem.Bounds.Y - chatVScroll.Value,
m_mouseOnSubItem.Bounds.Width, m_mouseOnSubItem.Bounds.Height));
//this.Invalidate();
return;
}
}
ClearSubItemMouseOn(); //循环做完没发现子项 那么判断是否在列表上面
if (new Rectangle(0, items[i].Bounds.Top - chatVScroll.Value, this.Width, 20).Contains(e.Location))
{
if (items[i].Equals(m_mouseOnItem))
{
return;
}
ClearItemMouseOn();
m_mouseOnItem = items[i];
this.Invalidate(new Rectangle(
m_mouseOnItem.Bounds.X, m_mouseOnItem.Bounds.Y - chatVScroll.Value,
m_mouseOnItem.Bounds.Width, m_mouseOnItem.Bounds.Height));
//this.Invalidate();
return;
}
}
else
{ //如果列表项没有展开 重绘列表项
if (items[i].Equals(m_mouseOnItem))
{
return;
}
ClearItemMouseOn();
ClearSubItemMouseOn();
m_mouseOnItem = items[i];
this.Invalidate(new Rectangle(
m_mouseOnItem.Bounds.X, m_mouseOnItem.Bounds.Y - chatVScroll.Value,
m_mouseOnItem.Bounds.Width, m_mouseOnItem.Bounds.Height));
//this.Invalidate();
return;
}
}
}//若循环结束 既不在列表上也不再子项上 清空上面的颜色
ClearItemMouseOn();
ClearSubItemMouseOn();
base.OnMouseMove(e);
}
/// <summary>
/// 判断一个列表项是否在集合内
/// </summary>
/// <param name="item">要判断的列表项</param>
/// <returns>是否在列表项</returns>
public bool Contains(ChatListItem item)
{
return(this.IndexOf(item) != -1);
}
/// <summary>
/// 获取列表项所在的索引位置
/// </summary>
/// <param name="item">要获取的列表项</param>
/// <returns>索引位置</returns>
public int IndexOf(ChatListItem item)
{
return(Array.IndexOf <ChatListItem>(m_arrItem, item));
}
