public override void TreeViewDrawNodePlusMinus (TreeView treeView, TreeNode node, Graphics dc, int x, int middle)
{
int height = treeView.ActualItemHeight - 2;
dc.FillRectangle (ResPool.GetSolidBrush (treeView.BackColor), (x + 4) - (height / 2), node.GetY() + 1, height, height);
dc.DrawRectangle (SystemPens.ControlDarkDark, x, middle - 4, 8, 8);
if (node.IsExpanded) {
dc.DrawLine (SystemPens.ControlDarkDark, x + 2, middle, x + 6, middle);
} else {
dc.DrawLine (SystemPens.ControlDarkDark, x + 2, middle, x + 6, middle);
dc.DrawLine (SystemPens.ControlDarkDark, x + 4, middle - 2, x + 4, middle + 2);
}
}
#endregion
