private void RenderHeaderExpand(
Graphics g, GridPanel panel, ref Rectangle r)
{
if (panel.ShowGroupExpand == true)
{
Rectangle bounds = _ExpandButtonBounds;
if (IsVFrozen == false)
bounds.Y -= VScrollOffset;
if (panel.IsSubPanel == true)
bounds.X -= HScrollOffset;
bool hot = (_HitArea == GroupArea.ExpandButton);
Image image = (Expanded == true)
? panel.GetCollapseButton(g, hot) : panel.GetExpandButton(g, hot);
ExpandDisplay.RenderButton(g, image, bounds, r);
int n = panel.TreeButtonIndent +
(panel.LevelIndentSize.Width * IndentLevel);
r.X += n;
r.Width -= n;
}
else
{
r.X += 3;
r.Width -= 3;
}
}