C / C++ / MFC

Jon Sagara6-Mar-02 12:01

Jon Sagara

6-Mar-02 12:01

Well in that case, check out these free scripts. And may the force be with you.

Jon Sagara

What about ?

Sonork ID: 100.9999 jonsagara

Nish Nishant6-Mar-02 17:17

6-Mar-02 17:17

Jon Sagara wrote:
You're a sadist

The word you probably intended to use was 'masochist'

Nish

[Signature temporarily down]

Jon Sagara6-Mar-02 18:07

Jon Sagara

6-Mar-02 18:07

Thank you, Mr. Pedantic. Will that be all?

Jon Sagara

What about ?

Sonork ID: 100.9999 jonsagara

Nish Nishant6-Mar-02 18:34

Writing a NT Service using ATL in VC++ 7

6-Mar-02 18:34

Jon Sagara wrote:
Thank you, Mr. Pedantic. Will that be all?

LOL

Nish

[Signature temporarily down]

Le centriste6-Mar-02 11:03

Le centriste

6-Mar-02 11:03

Anyone have a pointer to some documentation writing a service using ATL in Visual Studio 7, with the Attributed box checked in "Application Settings".

I am talking about a regular NT service here.

Tx

Michel

If I am wrong or said something stupid, I apologize in advance Wink | ;)

MDI child windows

Rajveer6-Mar-02 9:59

Rajveer

6-Mar-02 9:59

I've created an MDI application, and I'm doing graphics drawing in the child window using OpenGL. For some reason, whenever I draw something and then open a new window, the exact same scene is in the new window also. Also, if I have a few child windows open and I create or alter a scene in one of them, all other windows end up displaying the altered screen. This kind of defeats the purpose of an MDI application if every single child window is displaying the same thing. Why does this happen and how can I fix it?

Re: MDI child windows

Roger Allen7-Mar-02 5:23

Roger Allen

7-Mar-02 5:23

We had a similar problem in one of our OpenGL apps. Are you using call lists in the OpenGL rendering process? If you are make sure you are rendering to a unique call list number and playing back the correct one for the MDI window in question.

Roger Allen
Sonork 100.10016

If I'm not breathing, I'm either dead or holding my breath.
A fool jabbers, while a wise man listens. But is he so wise to listen to the fool?

Virtual table and backward compatibility

6-Mar-02 9:25

I have DLL that hold pointer to class that allocated in other DLL, this class has virtual functions so the DLL can use it with no need to Export & Import this class.
In these situation, I can add virtual functions to the class interface and the other DLL does no effected from it (backward compatibility...) in one condition: the new functions should be declared after the last original function, so the Virtual Table order is kept.
so far so good, but here is my problem:
this class is derived from base class that also has virtual functions, and if I want to add functionality to the base class the Virtual Table order is changed and I don't have backward compatibility.
So, how can I add virtual function to base class without changing the virtual table order ???
Thanks in advance

Didi Gurfinkel

Joaquín M López Muñoz6-Mar-02 9:36

6-Mar-02 9:36

I'm not sure whether this will work, but it's simple to give it a try: derive virtually from your base class:

class Derived: virtual public Base
{
...
};

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

6-Mar-02 9:35

Wow, that was quick !
Its seemed that it works.
Thanx
DD

6-Mar-02 9:50

Do you know what is the overhead of using virtual public ?
DD

Joaquín M López Muñoz6-Mar-02 10:52

Standard Interfaces : MIDL

6-Mar-02 10:52

Hmmm... I think it is about an extra pointer per virtual base class (with respect to space) and an extra offset when accessing data in a virtual base class (with respect to execution). But I'm far from 100% about this. Plus, implementations vary wildly between compilers, and I don't have much info about VC++ class layout.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Prem Kumar6-Mar-02 8:29

Prem Kumar

6-Mar-02 8:29

Hi,
If my component is supporting any standard interfaces
IPersistStream or IErrorInfo
do I need to specify these interfaces in the
coclass section ?

Re: Standard Interfaces : MIDL

Aaron Schaefer6-Mar-02 12:08

Aaron Schaefer

6-Mar-02 12:08

Yes.

Also, make sure you have a COM_INTERFACE_ENTRY(IWhatever) in the COM_MAP in your CoClass's .h file.

function pointer

Steve Severance6-Mar-02 8:19

Steve Severance

6-Mar-02 8:19

Is it possible have a function pointer to a member function of a class?

Thanks.

Steve

Not all who wander are lost...

Joaquín M López Muñoz6-Mar-02 8:34

6-Mar-02 8:34

This is question #1 here at the forum. Please consult Mike Dunn's C++ FAQ.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

PS: Oops, I mistook your question for the related (though not identical) problem of having a callback invoke a member function.
Please follow the wise answers of the other folks.

Nish Nishant6-Mar-02 9:18

6-Mar-02 9:18

Joaquín M López Muñoz wrote:
PS: Oops, I mistook your question for the related (though not identical) problem of having a callback invoke a member function.
Please follow the wise answers of the other folks.

LOL

Gosh! I am havin a good time at 2 AM Smile | :)

Nish

[Signature temporarily down]

Joaquín M López Muñoz6-Mar-02 9:24

6-Mar-02 9:24

What's so funny? (I'm not offended, just clueless)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Nish Nishant6-Mar-02 9:28

6-Mar-02 9:28

Oh well, maybe it's cause it past 2 AM. I somehow found that misunderstanding kinda humorous. Actually more than the misunderstanding, your update of the post was hilarious. You have a great sense of humor Joaquin Smile | :)

I appreciate it highly Smile | :)

Thanks for making me feel nice. Was a bit pissed about something....Now I feel much better!

Nish

[Signature temporarily down]

Joaquín M López Muñoz6-Mar-02 9:32

6-Mar-02 9:32

Was a bit pissed about something....Now I feel much better!

Oh, glad to be helpful in such a weird way Smile | :)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

C^hris L^osinger6-Mar-02 8:38

C^hris L^osinger

6-Mar-02 8:38

yes. but it's not nice.

http://www.codeproject.com/lounge.asp?forumid=1159&app=50&fr=101&select=126729#xx126729xx

-c

Smaller Animals Software, Inc.
You're the icing - on the cake - on the table - at my wake. _{Modest Mouse}

pba_6-Mar-02 8:39

pba_

6-Mar-02 8:39

Here is a code snippet :

class CTest
{
public:
void test1(CString t)
{
AfxMessageBox( _T("test1: ") + t);
}
void test2(CString t)
{
AfxMessageBox( _T("test2: ") +t);
}
};

//test
............
typedef void (CTest::*method_ptr)(CString);
CTest x;

method_ptr fn;
fn = &CTest::test1;

(x.*fn)("xyz");

fn = &CTest::test2;
(x.*fn)("xyz");

...........

Nish Nishant6-Mar-02 9:03

6-Mar-02 9:03

#include <stdio.h>

class A
{
public:
	void abc()
	{
		printf("hello world");
	}
};




int main(int argc, char* argv[])
{
	void (A::*pf)()=&A::abc;
	A a;
	(a.*pf)();
	return 0;
}

Nish

[Signature temporarily down]

Steve Severance6-Mar-02 15:52

Steve Severance

6-Mar-02 15:52

So basicly there is not a way to have an indpendant type of function pointer that can work for any function in any class?
I am trying to implement a command list where when the user type in a command it searches through its list, finds it and then executes the appropriate function.

Thanks.

Steve

Not all who wander are lost...

Nish Nishant6-Mar-02 16:39