public void AddAttribute(GraphicAttribute attribute)
{
if (m_AttributeStack == null)
m_AttributeStack = new GraphicAttributeStack();
m_AttributeStack.AddAttribute(attribute);
}
public void RemoveAttribute(GraphicAttribute attribute)
{
if (m_AttributeStack != null)
{
m_AttributeStack.RemoveAttribute(attribute);
// Release the stack if there is no attribute.
if (m_AttributeStack.Count == 0)
m_AttributeStack = null;
}
}
// This class can't be created
protected DisplayItem()
{
m_AttributeStack = null;
}