Re: Annotation object

[User (Legacy)]

Hi Josh, 

I tried your code but it doesn't work too. The call to raw_GetExtension() 

instantly returns the error CO_E_CLASSSTRING (Invalid class string) even if 

the extension is already added. So pAnnList is always NULL and, as a result, 

2 or more annotate toolbars (and thus annotate extensions) appear on the 

chart (instead of single). 

From what the error text says I suspect that the problem is with 

"AnnotationX.AnnList" string. For some reason raw_GetExtension() doesn't 

recognize it as a valid extension name. 

Annotatex.dll is registered because AddExtension works and annotation 

objects work too. 

Serge 

"Josh Eanes" <josheanes@bihrle.com> wrote in message 

news:DE0379D14694D211B4CE00609770710D05CCE1@sftfx-221.wamnet.net... 

> HI Serge, 

> 

> From what I understand with the getextension call, a failure to return 

!NULL 

> means it was found.  Frank told me a while ago to try and use the 

> raw_GetExtension call so that it doesn't return and cause an unhandled 

> exception (or something like that- I had an awful time handling the return 

> of the GetExtension). 

> 

> Here is some code that works for me: 

> 

> The first part will check to see if it already exists.  If it does not 

> exist, it will create it.  Then it places the toolbar onto the window. 

> 

>  IAnnListPtr pAnnList; 

>  _bstr_t annotation = "AnnotationX.AnnList"; 

>   try 

>   { 

>    chartfx->raw_GetExtension(annotation, (IUnknown **) &pAnnList); 

>    if (pAnnList == NULL) 

>    { 

>     pAnnList.CreateInstance(__uuidof(AnnotationX)); 

>     HRESULT rs = chartfx->AddExtension((IUnknown *)pAnnList); 

>    } 

>   } 

>   catch(...) 

>   { 

>    pAnnList.CreateInstance(__uuidof(AnnotationX)); 

>    HRESULT rs = chartfx->AddExtension((IUnknown *)pAnnList); 

>   } 

>   pAnnList->Enabled = TRUE; 

>   pAnnList->put_ToolBar(TRUE); 

>   IToolBar *toolbar; 

>   pAnnList->get_ToolBarObj(&toolbar); 

>   toolbar->put_Visible(TRUE); 

>   toolbar->put_Docked(TGFP_BOTTOM); 

> 

> 

> 

> and when I want to remove the extension (and this removes the toolbar 

also): 

> 

>   try 

>   { 

>    chartfx->raw_GetExtension(annotation, (IUnknown **) &pAnnList); 

>   } 

>   catch(...) 

>   { 

>   } 

>   if (pAnnList != NULL) chartfx->raw_RemoveExtension(annotation); 

> 

> 

> HTH 

> -- 

> Josh Eanes 

> 

> 

> 

> "Serge S. Spiridonoff" <sss@corbina.net> wrote in message 

> news:DE0379D14694D211B4CE00609770710D05BFFF@sftfx-221.wamnet.net... 

> > To explain my question in the previous post. 

> > 

> > I can't get the method GetExtension to work. 

> > 

> > ... 

> > m_pChartFX->AddExtension((IUnknown *)m_pAnnotationList); 

> > 

> > // for test purposes 

> > if (m_pChartFX->GetExtension(_T("AnnotationX.AnnList")) == NULL) { 

> > ... 

> > 

> > In the above code, GetExtension returns an error CO_E_CLASSSTRING 

(Invalid 

> > class string). 

> > I also tried "AnnotateX.AnnList" as suggested by the help but it also 

> > returns the same error. 

> > 

> > AddExtension works fine because the annotation toolbar appears on the 

> chart. 

> > 

> > Why I need to call GetExtension? 

> > 

> > I call AddExtension just after creation of the chart control 

> > (CreateInstanceLic). Then, depending on user selection, I may call the 

> > Import() method to load previously saved chart. 

> > If the chart being loaded is 3.0 format, then the extension disappears 

(no 

> > annotate toolbar) after the call to Import(). 

> > Btw, why? 

> > So I need to do AddExtension second time. However, sometimes I get 2 

> > annotate toolbars, so I need to check whether the extension is already 

> > added. 

> > 

> > So the question is: how to correctly check that the annotation extension 

> is 

> > already added to the chart? 

> > 

> > Thanks, 

> > Serge 

> > 

> > 

>