private void OnVisible(object sender, EventArgs e)
{
if ((_ribbonTriple != null) &&
(_ribbonTriple.Ribbon != null) &&
_ribbonTriple.RibbonGroup.Items.Contains(_ribbonTriple))
{
_changeService.OnComponentChanged(_ribbonTriple, null, _ribbonTriple.Visible, !_ribbonTriple.Visible);
_ribbonTriple.Visible = !_ribbonTriple.Visible;
}
}