Regular methods on the class object - ATL / WTL / STL Discussion Boards

nw6031218-Dec-02 18:25

18-Dec-02 18:25

Hello,

Here is the problem I have run into. I have an Atl Server Web App that is structured like the following:

\bin (dll's)
\include (common srf that get included)
\secure (srf pages that need to be under SSL, also needs access to inlcudes)
*.srf general srf pages that need access to the includes

Here is the problem, when one of the general srf files uses an include the path for the include internal handler is \bin\something.dll. The path used for the include is relative to the file that included it, not the include itself. Now when one of the secure pages includes the same file the handler path to the dll is wrong, it tries to load the library from ...secure\bin\something.dll. This causes an issue, if the handler paths were relative to the actual file being rendered all would be well. Has anybody run accross this before and have any suggestions? Seems like the alternative is assign SSL access on a file by file basis? Other than this issue ATL server seems like a slick framework!

Thanks for any suggestions!

ATL and GDI+

Jonathan de Halleux18-Dec-02 2:26

Jonathan de Halleux

18-Dec-02 2:26

Did someone already tried to use GDI+ in a ATL DLL ?

I tried to just initialize GDI+ in the InitInstance and deinitialize it in the ExitInstance but seems like registration of the dll fails ???

Jonathan de Halleux.

Re: ATL and GDI+

Jörgen Sigvardsson21-Dec-02 10:21

Jörgen Sigvardsson

21-Dec-02 10:21

If the registration of the dll failed, your code probably crashed in some way. Can't really say what is wrong.. Did you check to see that your input parameters to the gdi+ initialization functions are correct?

--
Only in a world this sh*tty could you even try to say these were innocent people and keep a straight face.

Re: ATL and GDI+

pba_23-Dec-02 12:54

pba_

23-Dec-02 12:54

In docs is stated that you should not call GdiplusStartup or GdiplusShutdown in DllMain or in any function that is called by DllMain ( for solutions look for "GdiplusStartup" in MSDN).

Re: ATL and GDI+

Jonathan de Halleux24-Dec-02 2:58

Jonathan de Halleux

24-Dec-02 2:58

Thanks ! It's working now. I had putted GDI+ initialization in the CWinApp::InitInstance and, in fact, it was called by DllRegister...

Jonathan de Halleux.

Attributed ATL and interfaces

Chad Busche16-Dec-02 6:44

Chad Busche

16-Dec-02 6:44

I have created a couple interfaces that do not have a coclass. The coclass's for these interface exists in different dll's. When I build my project these interfaces do not included into my dll.. I've created a dummy class that implements these interfaces and that works. Is there any other way?

thanks in advance.

Re: Attributed ATL and interfaces

Jörgen Sigvardsson16-Dec-02 10:40

Jörgen Sigvardsson

16-Dec-02 10:40

How about #import "your.dll"?

--
Only in a world this sh*tty could you even try to say these were innocent people and keep a straight face.

Regular methods on the class object

Mehdi Mousavi14-Dec-02 3:48

Mehdi Mousavi

14-Dec-02 3:48

Dear folks,

Consider 2 components, COuter that implements IOuter and CInner that implements IInner. OTOH, CInner is *auto aggregated* within COuter. By auto aggregation I mean it's aggregated within the COuter class using COM_INTERFACE_ENTRY_AUTOAGGREGATE ATL's macro.

Moreover, I've got some regular member methods on CInner, say, SetId, SetOrigin, and the like. These method *are not* on my IInner interface, they are placed as member functions of the class (as mentioned above). The IInner contains "Get" accessors, say, GetId, GetOrigin and the like so that the user could *only* obtain some information using the IInner interface. She cannot set anything on the object, since there's no "Set" accessors on IInner.

Now, I'm going to use the objects mentioned above, so that I can call those Set accessors within the program and the user could successfully get these values using the Get methods on IInner. I tried the following:

IOuterPtr spOuter;
HRESULT hRes = COuter::_CreatorClass::CreateInstance(NULL, IID_IOuter, (void **)&spOuter);
if(FAILED(hRes))
return FALSE;

CComAggObject<cinner> *pInner;
hRes = CComAggObject<cinner>::CreateInstance(spOuter, &pInner);
if(FAILED(hRes))
return FALSE;

pInner->m_contained.SetId(24950);

IInnerPtr spInner;
hRes = pInner->QueryInterface(IID_IInner, (void **)&spInner);
if(FAILED(hRes))
return FALSE;

But this is basically wrong, since the Inner object is *auto aggregated* ! Do you have any idea how I can create such things? Something like ITCallInfoChangeEvent that gives the user some informaiton via it's Get accessors, (get_Call and get_Cause to name a few) and user cannot set anything on this object, since it's got no Set accessor.

Any help would be highly appreciated,

Cheers

Mehdi Mousavi

Re: Regular methods on the class object

AlexO19-Dec-02 4:25

AlexO

19-Dec-02 4:25

How about plain old approach of simple object with two interfaces?

Re: Regular methods on the class object

Mehdi Mousavi19-Dec-02 6:27

Mehdi Mousavi

19-Dec-02 6:27

Well, I finally ended up in having 2 different interface on my inner object, one for initialization and the other one for Get accessors.

Cheers,

Mehdi Mousavi

ATL 7.0 Creating Clients for COM Components

jparsons13-Dec-02 14:56

jparsons

13-Dec-02 14:56

I'm at the edge right now. I've spent all afternoon trying to create a client for the simplest of COM components.

I started an ATL project library. I added a class Calculator with the interface ICalculator.

Now I just want to make a trivial client that calls the Add method. I can't get anything to work. I try to include "../Calculator.h" into the Client code but I get errors with DECLARE_PROTECT_FINAL_CONSTRUCT. Including _Utils.tlb isn't helping at all.

Can anyone point me to where I can find a simple tutorial for creating clients for ATL 7.0 com objects?

Jared
jparsons@jparsons.org
www.prism.gatech.edu/~gte477n

Re: ATL 7.0 Creating Clients for COM Components

Jörgen Sigvardsson16-Dec-02 10:44

Jörgen Sigvardsson

16-Dec-02 10:44

You're including the wrong file I'm afraid.

If your COM-dll projects is named XYZ, include the autogenerated XYZ.h. Also make sure you include XYZ_i.c somewhere, perhaps stdafx.cpp? It contains the GUIDs related to your interfaces and classes.

Either that or #import "XYZ.dll"

--
Only in a world this sh*tty could you even try to say these were innocent people and keep a straight face.

Child Dialog and the XP visual styles

Chad Busche13-Dec-02 11:32

Chad Busche

13-Dec-02 11:32

In a tabbed property page I found out MS uses a gradiant to fill the the client area when using the XP visual styles & new common control library. On one of my property pages I have a child dialog derived from CAxDialogImpl<myclass>. Since this child control is at the bottom of property page I get a big white rectangle where my child dialog is.... it just looks bad.

The only solution i can come up with is move the controls on the child dialog into the property page. Anybody have any ideas, thanks in advance.

WTL Community

Michael P Butler13-Dec-02 2:07

Michael P Butler

13-Dec-02 2:07

Where do all the WTL programmers hang out, is it just the Yahoo WTL mailing list. I'm trying to improve my WTL skills and I'm looking for good code examples and components besides the ones here at CP.

A Google search tends just to point me at the mailing list or at CodeProject and a few foreign language pages. Any suggestions on where I need to be hanging out.

Michael

Fat bottomed girls
You make the rockin' world go round -- Queen

Re: WTL Community

Paul Selormey13-Dec-02 2:24

Paul Selormey

13-Dec-02 2:24

I do not think you need special codes besides the ones here. All the MFC codes (at least most) translate into WTL easily, so just pick the basis and you will be fine.

Start some project yourself and you will have enough to learn. I just started my WTL project and is it a good learning process.

Best regards,
Paul.

Jesus Christ is LOVE! Please tell somebody.

Re: WTL Community

Ramon Casellas13-Dec-02 2:54

Ramon Casellas

13-Dec-02 2:54

You may know this one, but just in case

Bjarke Viksoe Home Page, see the URL:

viksoe.dk

ATL/WTL section.

Bjarke has been very nice publishing his work. Although there is not a lot of documentation, I've learnt a lot from his sources.

Best Regards,

Ramon

Re: WTL Community

AlexO19-Dec-02 5:08

AlexO

19-Dec-02 5:08

What is it we are not good enough for you? Big Grin | :-D

Using CComPtr<IHTMLDocument2Ptr>? (first time in ATL...)

Joan M13-Dec-02 0:10

Joan M

13-Dec-02 0:10

Hello,

INTRODUCTION
Using VC++6 sp5
MS W2k sp3

I'm using CHtmlView in order to show web pages (that are modified from my dialog based VC++ program) to the user.
In order to be able to do that I'm using Paul Di Lascia's HTMLCtrl and since today this code:

pIDispatchPtr.QueryInterface(pHTMLDocPtr);

if (lpDispatch)
{
    hr = lpDispatch->QueryInterface(IID_IHTMLDocument2, (LPVOID*)&pHTMLDocument2);
    lpDispatch->Release();

    hr = pHTMLDocument2->get_body(&pBody);
    pHTMLDocument2->Release();

    bstr = csCodiHTML.AllocSysString();

    if (pBody)
    {
        pBody->put_innerHTML(bstr);
        pBody->Release();
    }

    SysFreeString(bstr);
}

The main problem is that for some reason the memory "allocated" is not being freed.

After posting "ho can I free this" in the VC++6 forum, somebody has told me to do it using ATL and COM smart pointers...

I've added this line to the "stdafx.h":

#include <atlbase.h>

QUESTION
I have no idea how to do this, since is my first time in ATL...

I've used this...

CComPtr<IHTMLDocument2Ptr> spHTMLDocPtr;
CComPtr<IDispatchPtr> spIDispatchPtr;
spIDispatchPtr = this->m_HTMLCtrl.GetHtmlDocument();

and I'm getting this error message (when I compile):
error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'struct IDispatch *' (or there is no acceptab
le conversion)

could you tell me how to use those smart pointers in order to link them to the HTML document and to free them when finished?

SUMMARY
I need to know:
- How to link com pointers to the HTML document.
- The HTML document is intended to be taken from a CHtmlView derived class.
- How to free those pointers.

Thanks in advance.

Re: Using CComPtr? (first time in ATL...)

Paul M Watt13-Dec-02 5:20

Paul M Watt

13-Dec-02 5:20

First, click the "Display this message as-is (no HTML)" in order to make sure that all of your < and > tags appear in your code.

Next it looks like you are declaring your smart pointers like this:

CComPtr<IHTMLDocument2Ptr> spHTMLDocPtr;
CComPtr<IDispatchPtr> spIDispatchPtr;

When you declare a smart pointer with CComPtr you only need to define the type, you don't need to define it as a pointer. So change your code to this:

CComPtr<IHTMLDocument2> spHTMLDocPtr;
CComPtr<IDispatch> spIDispatchPtr;

I believe this will fix your problem.

When ever these items are assigned, Addref is automatically called on your interfaces, and when the smart pointer goes out of scope, the reference is Released. If you would like to get a hold of a pointer without AddRef or Release being called, use Attach adn Detach respectively.

Good Luck

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Using CComPtr? (first time in ATL...)

Joan M13-Dec-02 5:37

Joan M

13-Dec-02 5:37

Thank you very much for your reply!

I'd solved the problem doing what you've suggested...

But I'm still having one problem:

CComQIPtr<IHTMLDocument2> spHTMLDocument = this->m_HTMLCtrl.GetHtmlDocument();
if(spHTMLDocument)
{
    CComQIPtr<IHTMLElement> spHTML;

    spHTMLDocument->get_body(&spHTML);

    if (spHTML)
    {
        bstr = csCodiHTML.AllocSysString();

        spHTML->put_innerHTML(bstr);

        spHTML.Release();
    }
    else
    {
        //spHTMLDocument->write(); <code>what I'm trying now...</code>
        //bstr = csCodiHTML.AllocSysString();
        //spHTMLDocument->createElement(bstr,&spHTML); <code>THIS DON'T MAKES ANYTHING...</code>
    }

OK, as you can see In the else clause I'm trying to write the HTML directly to the document. This is interesting for me because for some reason the first time that I try to get access to the document it's a null pointer... (all the other times it works fine).

Moreover if I can do it I'll avoid the usage of the second pointer making the code easier...

The only problem (I expect) is that I need to use a SAFEARRAY type in order to write directly to the document pointer and I don't know how to do it...

I've searched into the MSDN but there are not examples...

Thank you for your help!

Re: Using CComPtr? (first time in ATL...)

AlexO19-Dec-02 3:23

AlexO

19-Dec-02 3:23

Here is a sample; error handling is omitted (but required):

HRESULT hr = S_OK;
SAFEARRAY * pArray = ::SafeArrayCreateVector(VT_VARIANT, 0, 1);
if (pArray)
{
VARIANT* pElement = 0;
hr = ::SafeArrayAccessData(pArray,(LPVOID*) &pElement);
pElement->vt = VT_BSTR;
pElement->bstrVal = _bstr_t(L"Hello world.").copy();
hr = ::SafeArrayUnaccessData(pArray);
hr = spHTMLDocument->write(pArray);
::SafeArrayDestroy(pArray);
}

Re: Using CComPtr? (first time in ATL...)

Joan M19-Dec-02 3:44

Joan M

19-Dec-02 3:44

THANK YOU! (infinite times!)

Now I'm able to load memory contents into my HTML Control directly from memory giving a great look to my app without more effort than the one required to design a web page!

Thank you again!

list of VARIANT

bojinyu12-Dec-02 2:31

bojinyu

12-Dec-02 2:31

I want do built a list of VARIANT

#include <list> typedef std::list<variant> VARIANTLIST;
VARIANTLIST varList;

and I add a VARIANT into list varList;
VARIANT pp;
pp.vt=VT_I2;
pp.iVal=1;
varList.push_back(pp);

then length of vatList is increased 1, but the comment is not right.
What is the matter? Can you help me, Thanks.

Re: list of VARIANT

Daniel Strigl12-Dec-02 2:49

Daniel Strigl

12-Dec-02 2:49

What do you mean with "then length of vatList is increased 1, but the comment is not right"?

Daniel Wink | ;)

---------------------------
Never change a running system!

Re: list of VARIANT

bojinyu12-Dec-02 3:22

bojinyu

12-Dec-02 3:22

Sorry, I spell a word wrong.
I means then sizes of varList si increased 1, and now varList.size() return 1.
but the element VARIANT whose vt is not VT_I2.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.