Re: How can I call GetStyle() of nsIDOMNSHTMLElement

I assume you have a valid nsIDOMElement pointer ..

nsCOMPtr<nsIDOMElement> domElement;    // valid pointer to a DOM element

// QI nsIDOMElementCSSInlineStyle
nsCOMPtr<nsIDOMElementCSSInlineStyle> elementCSSInlineStyle =
do_QueryInterface(domElement);

// And get the style...
nsCOMPtr<nsIDOMCSSStyleDeclaration> domCSSStyleDecl;
domCSSStyleDecl->GetStyle( getter_AddRefs(domCSSStyleDecl));

-Jens

On Thu, May 20, 2010 at 10:41 PM, hap497 <[email protected]> wrote:
> Hi,
>
> If I have a pointer to nsIDOMNSHTMLElement* element, how can I call
> the GetStyle()?
>
> In nsGenericHTMLElement.h, it said
> // nsIDOMNSHTMLElement methods. Note that these are non-virtual
>  // methods, implementations are expected to forward calls to these
>  // methods.
>  // Forward to GetStyle which is protected in the super-class
>  inline nsresult GetStyle(nsIDOMCSSStyleDeclaration** aStyle)
>
> But when I do
> nsIDOMNSHTMLElement* element;
>  nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
>
>  nsresult result  = element->GetStyle(getter_AddRefs(cssDecl));
>
> My code will not compile.
>
> So can I safely cast my nsIDOMNSHTMLElement* to nsGenericHTMLElement*
> and call GetStyle() that way?
>
> Thank you.
> _______________________________________________
> dev-tech-dom mailing list
> [email protected]
> https://lists.mozilla.org/listinfo/dev-tech-dom
>