private void TreePrePaintItem(object sender, PaintTreeItemEventArgs args)
{
if ((_dropHighlightNode != null) && (_dropLinePosition == DropLinePosition.OnNode))
{
if (args.Node.Equals(_dropHighlightNode))
{
args.BackColor = _dropHighlightBackColor;
args.ForeColor = _dropHighlightForeColor;
}
}
}
private void TreePostPaintItem(object sender, PaintTreeItemEventArgs args)
{
if ((_dropHighlightNode != null) && (_dropHighlightNode == args.Node) && (_dropLinePosition != DropLinePosition.None))
{
using (System.Drawing.Pen pen = new System.Drawing.Pen(_dropLineColor, _dropLineWidth))
{
int leftEdge = args.Node.Bounds.Left - 4;
if (args.Node.ImageIndex >= 0)
{
leftEdge -= 20;
}
System.Windows.Forms.TreeView tree = args.Node.TreeView;
int rightEdge = tree.DisplayRectangle.Right - 4;
int lineVPosition;
if ((_dropLinePosition & DropLinePosition.AboveNode) == DropLinePosition.AboveNode)
{
lineVPosition = _dropHighlightNode.Bounds.Top;
args.Graphics.DrawLine(pen, leftEdge, lineVPosition, rightEdge, lineVPosition);
pen.Width = 1;
args.Graphics.DrawLine(pen, leftEdge, lineVPosition - 3, leftEdge, lineVPosition + 2);
args.Graphics.DrawLine(pen, leftEdge + 1, lineVPosition - 2, leftEdge + 1, lineVPosition + 1);
args.Graphics.DrawLine(pen, rightEdge, lineVPosition - 3, rightEdge, lineVPosition + 2);
args.Graphics.DrawLine(pen, rightEdge - 1, lineVPosition - 2, rightEdge - 1, lineVPosition + 1);
}
if ((_dropLinePosition & DropLinePosition.BelowNode) == DropLinePosition.BelowNode)
{
lineVPosition = _dropHighlightNode.Bounds.Bottom;
args.Graphics.DrawLine(pen, leftEdge, lineVPosition, rightEdge, lineVPosition);
pen.Width = 1;
args.Graphics.DrawLine(pen, leftEdge, lineVPosition - 3, leftEdge, lineVPosition + 2);
args.Graphics.DrawLine(pen, leftEdge + 1, lineVPosition - 2, leftEdge + 1, lineVPosition + 1);
args.Graphics.DrawLine(pen, rightEdge, lineVPosition - 3, rightEdge, lineVPosition + 2);
args.Graphics.DrawLine(pen, rightEdge - 1, lineVPosition - 2, rightEdge - 1, lineVPosition + 1);
}
}
}
}
