How to trap the document window activate event?

Question

Hi All,
I am working with a plugin development application. My requirement is, at any time I may have more than one document opened. The plugin window what I have designed gets populated with data from the xml file attached with the current document. Therefore whenever I switch between the document window, I need the plugin window to be refreshed so that it will load/display the contents from the current xml file.
For this I need to trap the activate document window event. So whenever a window is selected from the current list of opened windows, then the plugin should get refreshed automatically.
Actually, I tried inheriting the CWindowEH class and I used the kDocWindowBoss class for the same. But the event is not firing as expected. Help/tips from anyone could be appreciated.
Thanks in advance.
JR.

Answer 1

Hi, <br /><br />I don't think having observers on kDocBoss and kDocumentListBoss should be a problem. We do exactly that.<br /><br />Just running with a couple of break points in your code, do you hit the DocListObserver::AutoAttach and not the Update().<br /><br />If you don't hit the AutoAttach breakpoint then it's probably the resource is not set up right. Ours is like this..<br /><br />/** Observes document list actions.<br /> */<br />AddIn<br />{<br />     kDocumentListBoss,<br />     kInvalidClass,<br />     {<br />      IID_IMYDOCLISTOBSERVER, kMyDocListObserverImpl,<br />     }<br />},<br /><br />If you're getting to the AutoAttach but not the Update then it may be that you're not specifying what notifications you wish to receive.<br /><br />Our AutoAttach is like this..<br /><br />     do<br />     {<br />          InterfacePtr<ISubject> subject( this, UseDefaultIID());<br />          if (subject != nil)<br />          {<br />               if ( subject->IsAttached(this, IID_IDOCUMENTLIST, IID_IMYDOCLISTOBSERVER) == kFalse )<br />                    subject->AttachObserver(this, IID_IDOCUMENTLIST, IID_IMYDOCLISTOBSERVER);<br />          }<br />     }<br />     while ( kFalse );<br /><br />with equivalent DetachObserver code in the AutoDetach of course.