There are two approaches to creating superclasses.
1. Create the class with events such as "this_onBeforeDisplayEvent". In
this case, ND uses introspection and automatically registers the events for
the appropriate listeners.
2. Create the class with events such as "onBeforeDisplayEvent". In this
case, you have to add the code to register the class for the appropriate
listener.
In ND3, I always use the first approach. In ND4, I typically use the second
approach. Both work, though.
-- Grace
William Jaynes <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I'm working with ND4. As Aby suggests I've got a myBaseCalss which
> extends CSpPage. All my project pages inherit from myBaseClass. However,
> I haven't done anything with regard to ISpDisplayListener or
> ISpHtmlOutputListener. myBaseClass simply extends CSpPage, and has some
> methods defined (like this_onBeforeLoadEvent). My project pages seem to
> work fine, and the default methods from myBaseClass get called as I
> would expect.
>
> Aby and Curt suggest I need to add some listener related code, but my
> code as is seems to work as I'd expect. What am I not understanding
> here?
>
> - Will
>
> Aby Mathew wrote:
> >
> > This is verymuch possible in ND and is used very commonly.
> >
> > All you need is a class inherited from CSpPage which is packaged in the
> > same package as the project itself, and for each page in the project set
> > the 'superclass' property to myProject.myBasePage.
> >
> > In ND4 and above, a little additional effort would be required to
> > capture the events - onBeforeDisplay, onBeforeHtmlOutput etc. It can be
> > something like:
> > ==============================================================
> > public class myBaseClass extends CSpPage implements ISpDisplayListener,
> > ISpHtmlOutputListener {
> > ---
> > ---
> > public int init(){
> > int ret = super.init();
> > addDisplayListener(this);
> > addHtmlOutputListener(this);
> > return ret;
> > }
> >
> > onBeforeDisplayEvent() {
> > --
> > }
> >
> > onBeforeHtmlOutputEvent() {
> > ---
> > }
> > ===================================================
> >
> > Aby
> >
> > -----Original Message-----
> > Sent: Thursday, August 05, 1999 3:09 PM
> >
> > How do I "fake" visual inheritance of pages? I'd like to create a page
> > with
> > all my controls and error handling code. I want to be able to inherit
> > from
> > it so that, when I improve the base page, the descendants will benefit
> > automatically. I guess this isn't available in NetDynamics so I want to
> > know
> > how to fake it.
> >
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