protected virtual void DrawItemPlusMinusLines(Graphics graphics, Rectangle rect, TreeListItem item)
{
if (item.Owner == null)
{
return;
}
using (var pen = new Pen(Color.Gray))
{
pen.DashStyle = DashStyle.Dot;
var x = rect.X + 7;
int half = rect.Height / 2;
int y0 = item.Parent == null && item.Index == 0 ? rect.Top + half : rect.Top;
int y1 = item.Index == item.Owner.Count - 1 ? rect.Top + half : rect.Bottom;
graphics.DrawLine(pen, x, y0, x, y1);
graphics.DrawLine(pen, x, rect.Top + half, x + 8, rect.Top + half);
var parent = item;
for (int i = 1; i <= item.Level; i++)
{
parent = parent.Parent;
if (parent.Index != parent.Owner.Count - 1)
{
int ox = x - i * item.TreeList.Indent;
graphics.DrawLine(pen, ox, rect.Top, ox, rect.Bottom);
}
}
}
}
internal TreeListItemRenderEventArgs(TreeListItem item, Graphics graphics, Rectangle rect)
: base(graphics, rect)
{
Item = item;
}
internal TreeListCellCollection(TreeListItem item)
{
listitem = item;
}
internal void ProcessItemCheck(TreeListItem item)
{
RaiseAfterItemCheckChangeEvent(item);
InvalidateItem(item);
}
