/// <summary>
/// 清理鼠标所在项区域的阴影.
/// </summary>
private void ClearItemMouseOn()
{
if (m_mouseOnItem != null)
{
this.Invalidate(new Rectangle(
m_mouseOnItem.Bounds.X, m_mouseOnItem.Bounds.Y - chatVScroll.Value,
m_mouseOnItem.Bounds.Width, m_mouseOnItem.Bounds.Height));
m_mouseOnItem = null;
}
}
protected virtual void DrawItem(Graphics g, TextGroupItem item, Rectangle rectItem, SolidBrush sb)
{
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
sf.SetTabStops(0.0F, new float[] { 20.0F });
if (item.Equals(m_mouseOnItem)) //根据列表项现在的状态绘制相应的背景色
{
sb.Color = this.itemMouseOnColor;
}
else
{
sb.Color = this.itemColor;
}
g.FillRectangle(sb, rectItem);
if (item.IsOpen)
{
//如果展开的画绘制 展开的三角形
sb.Color = this.arrowColor;
g.FillPolygon(sb, new Point[] {
new Point(2, rectItem.Top + 11),
new Point(12, rectItem.Top + 11),
new Point(7, rectItem.Top + 16)
});
}
else
{
//绘制 不展开的三角形.
sb.Color = this.arrowColor;
g.FillPolygon(sb, new Point[] {
new Point(5, rectItem.Top + 8),
new Point(5, rectItem.Top + 18),
new Point(10, rectItem.Top + 13)
});
}
// 绘制文本.
string strItem = "\t" + item.Text;
sb.Color = this.ForeColor;
sf.Alignment = StringAlignment.Near;
g.DrawString(strItem, this.Font, sb, rectItem, sf);
}
/// <summary>
/// 鼠标移动 处理
/// </summary>
/// <param name="e"></param>
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();
}
}
//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
m_ptMousePos.Y += chatVScroll.Value;
#region 新算法
foreach (var item in Items)
{
if (item.Bounds.Contains(m_ptMousePos))
{
if (item.IsOpen)
{
//子项是展开的.查找子项.
foreach (var subitem in item.SubItems)
{
//鼠标在子项内.
if (subitem.Bounds.Contains(m_ptMousePos))
{
if (subitem.Equals(m_mouseOnSubItem))//与上次的子项一致.
{
return;
}
else
{
//引发鼠标在子项上的事件.
OnMouseOnSubItem(new GroupListBoxEventArgs(item, subitem));
}
ClearSubItemMouseOn();
ClearItemMouseOn();
m_mouseOnSubItem = subitem;
this.Invalidate(new Rectangle(
subitem.Bounds.X, subitem.Bounds.Y - chatVScroll.Value,
subitem.Bounds.Width, subitem.Bounds.Height));
return;
}
}
ClearSubItemMouseOn();
//子项没有发现 那么判断是否在列表上面
if (new Rectangle(0, item.Bounds.Top - chatVScroll.Value, this.Width, 20).Contains(e.Location))
{
//在原先的项上.
if (item.Equals(m_mouseOnItem))
{
return;
}
//不再原先的项上
ClearItemMouseOn();
m_mouseOnItem = item;
this.Invalidate(new Rectangle(
m_mouseOnItem.Bounds.X, m_mouseOnItem.Bounds.Y - chatVScroll.Value,
m_mouseOnItem.Bounds.Width, m_mouseOnItem.Bounds.Height));
return;
}
}
else
{
if (item.Equals(m_mouseOnItem))
{
return;
}
ClearItemMouseOn();
ClearSubItemMouseOn();
m_mouseOnItem = item;
//绘制指定的区域.
this.Invalidate(new Rectangle(
m_mouseOnItem.Bounds.X, m_mouseOnItem.Bounds.Y - chatVScroll.Value,
m_mouseOnItem.Bounds.Width, m_mouseOnItem.Bounds.Height));
return;
}
}
}
#endregion
#region 老算法
//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;
// }
// }
//}
#endregion
//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);
}
public GroupListBoxEventArgs(TextGroupItem mouseOnSubItem, TextSubItem selectSubItem)
{
_SelectSubItem = selectSubItem;
_MouseOnsubItem = mouseOnSubItem;
}