/// <param name="g">绘制图面.</param>
/// <param name="item">要绘制的GroupSubItem</param>
/// <param name="rect">绘制的区域.只提供起点(x,y),具体大小可以在重载时自行确定.</param>
/// <returns>下一个GroupItem的起点区域.</returns>
protected virtual Rectangle DrawSubItem(Graphics g, GroupSubItem item, Rectangle rect)
{
//绘制Item
rect.Height = _SubItemHeight;
SolidBrush sb;
if (item.Equals(_MouseOnSubItem))
{
sb = new SolidBrush(MouseOnSubItemColor);
}
else
{
sb = new SolidBrush(this.BackColor);
}
g.FillRectangle(sb, rect);
rect = PaintText(g, item.Text, rect, sb, item.IsOpen);
item.Bounds = rect;
rect = GetNextBounds(rect);
//绘制子Item
if (item.IsOpen)
{
rect.X += 20;
foreach (var sitem in item.SubItems)
{
rect = DrawCellItem(g, sitem, rect);
}
rect.X -= 20;
}
return(rect);
}
/// <summary>
/// 清理GroupSubItem区域.
/// </summary>
private void ClearSubItemBounds()
{
if (_MouseOnSubItem != null)
{
Rectangle rect = _MouseOnSubItem.Bounds;
rect.Y -= VerticalScroll.Value;
rect.X = 0;
this.Invalidate(rect);
_MouseOnSubItem = null;
}
}
/// <summary>
/// 鼠标移动处理.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
_MounsePos = e.Location;
int index = this.VerticalScroll.Value;
_MounsePos.X += this.HorizontalScroll.Value;
_MounsePos.Y += this.VerticalScroll.Value;
Rectangle rect;
foreach (var item in _Items)
{
if (item.Bounds.Contains(_MounsePos))
{
if (item.Equals(_MouseOnItem))//子项与上一次是相等的.
{
Debug.WriteLine("Item 与上次一样 ");
return;
}
else
{
ClearBounds();
_MouseOnItem = item;
rect = item.Bounds;
rect.Y -= index;
this.Invalidate(rect);
Debug.WriteLine("被选中的是Item {0}".FormatWith(item.Bounds));
return;
}
}
else
{
if (item.IsOpen)
{
foreach (var sitem in item.SubItems)
{
if (sitem.Bounds.Contains(_MounsePos))
{
if (sitem.Equals(_MouseOnSubItem))
{
Debug.WriteLine("SubItem 与上次一样 ");
return;
}
else
{
ClearBounds();
_MouseOnSubItem = sitem;
rect = sitem.Bounds;
rect.Y -= index;
this.Invalidate(rect);
Debug.WriteLine("被选中的是SubItem {0}".FormatWith(sitem.Bounds));
return;
}
}
else
{
if (sitem.IsOpen)
{
foreach (var citem in sitem.SubItems)
{
if (citem.Bounds.Contains(_MounsePos))
{
ClearBounds();
_MouseOnCellItem = citem;
rect = citem.Bounds;
rect.Y -= index;
OnMouseOnCellItem(new DataEventArgs <GroupCellItem>(citem));
this.Invalidate(rect);
Debug.WriteLine("被选中的是CellItem {0}".FormatWith(citem.Bounds));
return;
}
}
}
}
}
}
}
}
ClearBounds();
Debug.WriteLine("没有找到任何项");
foreach (var item in Items)
{
Debug.WriteLine(item.Bounds);
}
}
public GroupCellItemCollection(GroupSubItem item)
{
_Father = item;
_Owner = null;
}
