public MathNode ReplaceMathNode(MathNode curNode, Type type)
{
MathNode node = mathExp.ReplaceMathNode(curNode, type);
if (node != null)
{
mathExp.AddVariableMapItem(node);
if (_editor != null)
{
_editor.RefreshPropertyGrid();
_editor.ShowVariableMap(mathExp.VariableMap);
}
this.Refresh();
_changed = true;
}
return(node);
}