Problem with wxPDFMediaBackend

[bobmanc]

I am using the code in the help docs trying to view a pdf.
The code hits the CreateControl method in wxPDFMediaBackend so I know it is being compiled in.
Unfortunatley thats all it does.

Code: Select all

        if( ::CoCreateInstance(CLSID_Pdf, NULL,
                                  CLSCTX_INPROC_SERVER,
                                  DIID__DPdf, (void**)&pDispatch) != 0 )
            return false;

returns false every time. Any ideas?

[Ryan Norton]

Do you have acrobat (or acrobat reader) installed?

[bobmanc]

Just Reader. Is Acrobat required? If so is there another way to get a preview of a PDF?

[tan]

Hi,
just suggestion to get more information:

Code: Select all

        HRESULT hr = ::CoCreateInstance(CLSID_Pdf, NULL,
                                  CLSCTX_INPROC_SERVER,
                                  DIID__DPdf, (void**)&pDispatch);
        if( hr != S_OK )
        {
            // Look at errorcode and make conclusion
            return false;
         }

[bobmanc]

It returns E_NOINTERFACE which I assume means I need the full version of Acrobat. Thats lame. Anybody know of another way?

[jb_coder]

The wxPython demo embeds the Adobe PDF viewer. You could look at that for ideas on how to do this with wxWidgets.

[Ryan Norton]

It returns E_NOINTERFACE which I assume means I need the full version of Acrobat. Thats lame. Anybody know of another way?

Acrobat Reader should be fine. Keep in mind you need to enable the ActiveX control- sometimes (depending on version) this is an option in the options menu of Acrobat Reader.

Either that or the code is now out of date for the version you have

[bobmanc]

I am on WinXP and have Acrobat Reader 8. If I go into IE7 Manage Addons it lists Adobe PDF Reader as Enabled. Anything else I can check?

[Ryan Norton]

I am on WinXP and have Acrobat Reader 8. If I go into IE7 Manage Addons it lists Adobe PDF Reader as Enabled. Anything else I can check?

It may sounds wierd - but within the program's options itself it sometimes has (depending on version) an option to disable the ActiveX component (the adobe website has some FAQs about this too).

Anyway, if it embeds in your browser OK then the sample may be out of date/interface for 8 changed. I think the latest I tried was 7.

[Troels]

I am using the code in the help docs trying to view a pdf

http://www.wxwidgets.org/manuals/stable ... ainer.html

wxActiveXContainer isn't exported, you can't do this (follow this example) in user space when linking wx dynamically

Regard

[bobmanc]

Here is the latest.
I was able to download the installers for 6.01 and 7.09. Using the exact same wx code version 6.01 works fine. 7.09 and 8 both get the same error. E_NOINTERFACE returned fro the CoCreateInstance call.

Anybody been able to get this working on the later version?

[bobmanc]

The Acrobat Reader installers is what I meant.

[novato]

Hi.
Since AdobeReader7 instead of using pdf.ocx Adobe begins to use pdf.dll. Such change made CLSID_Pdf and DIID__DPdf different from the ones in the wxPDFMediaBackend example, thats why you get E_NOINTERFACE.

I already tried to view pdf into my app and it works fine with AdobeReader6, with AdobeReader7 (and the new CLSID) the CoCreateInstance returns S_OK but wx crashes when i try to load a file.

[bobmanc]

What are the new values for CLSID_Pdf and DIID__DPdf?

[Ryan Norton]

Thanks to Bob and others for trying this out!

And yes, wxActiveXContainer should be exported someplace; there are a lot of reasons why it was not but I guess that is ancient history now.

Oddly enough though I thought FOR SURE it worked in 7... guess I was wrong.