ATL / WTL / STL

Re: Windowless ActiveX control in WTL

30-Dec-03 23:27

Forjer wrote:
There will be only one flash control which will be the entire client area. Flash can communicate with its hosting program via a special command in its ActionScript, which fires an event. Together with the interface we get a two-way communication.

CAxWindow will do just fine for you, honest! CAxWindow offers an interface much like CWindow/CWnd. Just make it span over all your client area.

First create it with (pseudo code) CAxWindow::Create(hWndParent, clientrect, _T("ProgId.For.Flash"), WS_CHILD | WS_VISIBLE);. Then use CAxWindow::QueryControl to acquire a reference to an interface, which you can advise for events.

I'd suggest you create a WTL SDI-project using the WTL wizard. In the wizard, uncheck the "use a view window" checkbox. Click OK to generate project. Then in CMainFrame::OnCreate at the bottom, do something like this:

m_hWndClient = m_activex.Create(*this, rcDefault, _T("flash.prog.id or {clsid}"), WS_CHILD | WS_VISIBLE);
UpdateLayout();

The frame window will then resize your activex control automatically. About _T("flash.prog.id or {clsid}") see the Create method for CWindow in the MSDN docs. CAxWindow interprets the window text as a control class id/prog id. CAxDialogImpl uses this "trick".

It *will* work, and it'll save you from reimplementing the entire OLE hosting code (which is a lot, and not the easiest thing if you're new to COM).

Forjer wrote:
A search for the debug message led me to the file occsite.cpp, which led me to the ATL class IOleInPlaceObjectWindowlessImpl.

That impl stub is used by controls that implement activex interfaces - the interface IOleInPlaceObjectWindowless is used by the container to communicated with the control.

--
Watcha' gonna do, when Hulkamania runs wild on you!?

forjer31-Dec-03 2:53

forjer

31-Dec-03 2:53

Your efforts are very kind, but I think you missed the point. If I understand the code correctly, it won't make the control windowless, which is my *only* problem.

I have to make it windowless because I only want to show the flash GUI and nothing else. The only way I can achieve this without a windowless control would be to build a square GUI - but that would be unesthetic.

Re: Windowless ActiveX control in WTL

Jörgen Sigvardsson31-Dec-03 3:00

31-Dec-03 3:00

Ah.. then I think you're out of luck. Now, I may be wrong on this one, but I can't seem to find anything in the OLE/activex interfaces which indicate non rectangular controls.

--
Watcha' gonna do, when Hulkamania runs wild on you!?

Please Explain This

Prakash Nadar28-Dec-03 17:07

Prakash Nadar

28-Dec-03 17:07

I Developed a com service using ATL and added one interface to it. During the development time the serivce was registered as /RegServer.
For Release version i need to register it as /Service and when i do so i get the following error.

0x80004015 The class is configured to run as a security id different from the caller

what should i do to solve this problem thank you.

My God is more powerfull Than Your God. (the line that divides the world)

Re: Please Explain This

forjer29-Dec-03 7:46

forjer

29-Dec-03 7:46

You need admin rights.

When most installtion programs run into this kind of situtation, they just tell the user they don't have enough rights.

I don't think there's a way around it - as that would be insecure.

Re: Please Explain This

Prakash Nadar29-Dec-03 16:00

Prakash Nadar

29-Dec-03 16:00

I guess i found the solution, i was not registering the right version as /service.
If you try to register a debug build as /service it fails and gives that error message.
I compiled the code with mindependency release then tried to register it. It got registered and it works.

Thanx for replying anyways.

My God is more powerfull Than Your God. (the line that divides the world)

STL map.

WREY28-Dec-03 13:57

28-Dec-03 13:57

There is this huge STL map created inside a class object that is unique (meaning, there is only ONE such class object).

It reaches a point where I DON'T want to add anything more to the map, but would like to keep reusing it (meaning, empty out some of its content and keep the map for reuse). Because of its size, it seems almost impractical to do a "find" on the thousands of keys I would like to eliminate, thereby making room for the new entries I would like to insert.

I am looking for a way to accomplish what I'm trying to do, without having to make C++ do it (meaning, I would like to see if there is a way to have STL take care of the situation itself).

Thanks for any insight.

Smile | :)

William

Fortes in fide et opere!

Anthony_Yio28-Dec-03 15:05

Anthony_Yio

28-Dec-03 15:05

check out STL algorithms. (use remove_if())

sample codes below.

using namespace std;

int main()
{
vector<int> coll;

INSERT_ELEMENTS(coll,2,6);
INSERT_ELEMENTS(coll,4,9);
INSERT_ELEMENTS(coll,1,7);
PRINT_ELEMENTS(coll,"coll: ");

//remove all elements with value 5
vector<int>::iterator pos;
pos = remove (coll. begin(), coll.end(), //range
5); //value to remove

PRINT_ELEMENTS(coll,"size not changed: ");

//erase the "removed" elements in the container
coll. erase (pos, coll.end());
PRINT_ELEMENTS(coll,"size changed: ");

//remove all elements less than 4
coll.erase(remove_if (coll.begin(), coll.end(), //range
bind2nd(less<int>(),4)), //remove criterion
coll.end());
PRINT_ELEMENTS(coll,"<4 removed: : ");
}

for replacing element in container. Use replace_copy_if(...)

BTW, my sample code is not using std::map but more or less the same I suppose.

Hope this helps.

Sonork 100.41263:Anthony_Yio

WREY28-Dec-03 16:12

28-Dec-03 16:12

Thanks for replying.

Yes, I recognized your sample as the one on page 379 of Josuttis' book, "The C++ Standard Library." However, if you were to look on the page before that, page 378 (the third bullet from the bottom), it reads, "Due to modifications, you cannot use these algorithms for an associative container." One of the algorithms it is referring to, is "remove_if()".

Map is an associative container, and therefore you cannot use "remove_if()" on it!!

Hmmm | :|

William

Fortes in fide et opere!

Jörgen Sigvardsson29-Dec-03 12:39

29-Dec-03 12:39

WREY wrote:
Map is an associative container, and therefore you cannot use "remove_if()" on it!!

Well, that's a finer version of the truth. The truth is that associative containers are designed such that client code cannot reorder the elements. The sole reason for that design reason was to allow implementations to use binary search trees and hash maps - data structures which does not allow arbitrary order of elements.

--
Watcha' gonna do, when Hulkamania runs wild on you!?

Jörgen Sigvardsson29-Dec-03 11:31

29-Dec-03 11:31

Write your own remove/filter function?

template <typename Coll, typename Predicate>
void filter(Coll& coll, const Predicate& p) {
    typename Coll::iterator i = coll.begin(), end = coll.end();
    while(i != end) {
        if(p(*i))
            i = coll.erase(i);
        else
            ++i;
    }
}
 
struct MyFilter { 
    bool operator()(const std::pair<Key, Value>& v) const {
        // decide based on v whether it should be filtered out or not
    }
};
 
filter(myColl, MyFilter());

That ought to work?

--
Watcha' gonna do, when Hulkamania runs wild on you!?

WREY1-Jan-04 1:48

1-Jan-04 1:48

Thanks for replying.

What you have described above, looks very similar to the "for_each" algorithm, which is what I'll probably end up using in combination with "stable_partition".

Wink | ;)

William

Fortes in fide et opere!

Jörgen Sigvardsson1-Jan-04 5:01

1-Jan-04 5:01

I'm sorry, but stable_partition can't be used with associative types, as you cannot control the order of the items (which is what stable_partition does).

Also, be aware that for_each cannot be used to manipulate the collection which you iterating. You may manipulate the individual items, but not the overall collection, because you could end up screwing up iterators for for_each.

--
They say the most horrible things, but I hear violins.
When I close my eyes, I'm at the center of the sun.

WREY1-Jan-04 14:09