newbie - Downcasting problem

[Troels Rossing <tr...@qualiware.com>]

Hi

 

I'am trying to correct my code to follow the new C++ binding
architechture.

 

I have a DOMElement node that represents a pointer to where I am in the
DOM tree (nessesary since this is part of an interface for a
script-language).

This is how I did it in the old version :

 

DOMElement m_LoadActiveNode;//(defined as a class member variable)

 

DOMNode tmpNode;

  tmpNode = m_LoadActiveNode.getPreviousSibling();

  if(tmpNode!=NULL)

  {

     m_LoadActiveNode = (DOMElement &)tmpNode;

  }

 

 

In the new 2.0.1, the m_LoadActiveNode is a pointer and not an
instantiated object, thus the downcast does not work. How do I solve
this problem???

 

 

I need something to hold a pointer to a node in the tree, since the DOM
interface is to be accessible from a scriptlanguage.

 

e.g.

 

scriptXMLsetFirstChild();

str = scriptXMLgetNodeName();

 

Any ideas of how to do the downcast or any other way to maintain a
DOMtree pointer as a class member variable would be very welcome.

 

 

Regards 

 

 

Troels Rossing

 

www.Qualiware.com

 

Re: newbie - Downcasting problem

[Gareth Reakes <ga...@decisionsoft.com>]

Hi,
	
> DOMElement *m_LoadActiveNode;//(defined as a class member variable)
> 
>  
> 
> DOMNode *tmpNode;
> 
>   tmpNode = m_LoadActiveNode->getPreviousSibling();
> 
>   if(tmpNode!=NULL)
> 
>   {
>      m_LoadActiveNode = static_cast<DOMElement *>(tmpNode);
> 

	//or safer if you use rtti
       m_LoadActiveNode = dynamic_cast<DOMELement *>(tmpNode)
> 
>   }


Gareth

-- 
Gareth Reakes, Head of Product Development  
DecisionSoft Ltd.            http://www.decisionsoft.com
Office: +44 (0) 1865 203192



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