private TreeListHitTestInfo HitTestCell(VirtualTreeListItem vitem, Rectangle rect, int x, int y)
{
var workRect = _bound.ItemBound;
var x1 = workRect.X - GetOffsetLeft();
var item = (TreeListItem)vitem.Item;
foreach (var column in Columns)
{
if (column.Index > item.Cells.Count)
{
return(null);
}
if (column.Hidden)
{
continue;
}
var rect1 = new Rectangle(x1, rect.Y, column.Width, ItemHeight);
if (rect1.Contains(x, y))
{
var owner = new TreeListHitTestInfo(TreeListHitTestType.Item, vitem, rect);
if (column.Index <= item.Cells.Count - 1)
{
return(new TreeListHitTestInfo(TreeListHitTestType.Cell, item.Cells[column.Index], rect1)
{
Owner = owner
});
}
else
{
return(owner);
}
}
x1 += column.Width;
}
return(null);
}
/// <summary>
/// 提供座标 x 和 y 处的复选框信息。
/// </summary>
/// <param name="item"></param>
/// <param name="rect"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
private TreeListHitTestInfo HitTestItemCheckbox(VirtualTreeListItem item, Rectangle rect, int x, int y)
{
if (ShowCheckBoxes)
{
var sitem = (TreeListItem)item.Item;
//如果项不可用，则单选按钮不可用
if (!sitem.Enabled || !sitem.ShowBox)
{
return(null);
}
var x1 = rect.Left + sitem.Level * Indent;
//复选框区域
var mrect = new Rectangle(x1, rect.Top, 15, ItemHeight).Middle(15, 15);
if (ShowPlusMinus)
{
mrect.Offset(16, 0);
}
//获取第一列的区域
var firstColumn = GetFirstColumn();
var crect = GetColumnBound(firstColumn);
//获取当前Cell的区域
var srect = new Rectangle(crect.X, rect.Top, crect.Width, ItemHeight);
if (mrect.Contains(x, y) && srect.IntersectsWith(mrect))
{
return(new TreeListHitTestInfo(TreeListHitTestType.Checkbox, item, mrect));
}
}
return(null);
}