C / C++ / MFC Discussion Boards

David Crow30-Jan-08 8:22

30-Jan-08 8:22

Do you have an entry in your dialog's DoDataExchange() method for the COpenGLControl control? If so, can you temporarily comment it out and note the result.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Hour Glass won't go away!

@largeinsd31-Jan-08 8:24

@largeinsd

31-Jan-08 8:24

Uh, hrrmmm, no I don't have an entry in DDX for that. I guess I thought I didn't need one, because it's a graphics control (running an openGL instance) not a regular control exchanging values from input. The only input it takes is mouse clicks to orient the view.

I guess I'll put one in (for DDX_CUSTOM(), eh?) and see what happens.

Thanks - @LRG

Regarding integration of two different projects

H4u3229-Jan-08 17:46

H4u32

29-Jan-08 17:46

I have made Win32 project under Visual studio 2005. In this project I also included another project whose library needs to be used by my project. But the problem is that included project is written in core C and i am obviously having class based structure. So it is not allowing me to use library function of included project in my project. So how could i integrate these two projects? What configuration changes should i make under 2005?

Any help is much appreciated.

Thanks & Ragards,
Hemang

Re: Regarding integration of two different projects

Maxwell Chen29-Jan-08 18:05

Maxwell Chen

29-Jan-08 18:05

C++ projects can invoke C export functions, whereas C projects can not use C++ export functions and classes.

Maxwell Chen

Re: Regarding integration of two different projects

H4u3229-Jan-08 19:12

H4u32

29-Jan-08 19:12

Thanks for replying. I know this fact. But my problem is of some different sort. Let me more precise on the matter.

I am X.264 library for my project. This library has been generated using Msys and MinGW. I have included libx264.a in Additinal Dependencies tab. If i compile the included X.264 using C compile code in Linker/C-C++/Advanced/Compile As in project property page, then it is being compiled successfully, But if i compile as C++ then it gives me error. So what should i do? may i need to do any configuration changes for that under VS 2005?

Thanks & Regards,
Hemang

Re: Regarding integration of two different projects

Maxwell Chen29-Jan-08 19:34

Maxwell Chen

29-Jan-08 19:34

What are the error messages?

Maxwell Chen

Re: Regarding integration of two different projects

H4u3229-Jan-08 19:35

H4u32

29-Jan-08 19:35

error LNK2019: unresolved external symbol "struct x264_t * __cdecl x264_encoder_open(struct x264_param_t *)

Re: Regarding integration of two different projects

Maxwell Chen29-Jan-08 19:43

Maxwell Chen

29-Jan-08 19:43

Hemang Raval wrote:
error LNK2019: unresolved external symbol "struct x264_t * __cdecl x264_encoder_open(struct x264_param_t *)

Because I don't have your source to view the whole relationship, I could only guess.
Check the includes and / or prototypes for:

extern "C" {
  #include "some_header"
};
// Or ...
extern "C" {
  x264_t*   x264_encoder_open(x264_param_t*); // C++ does not need to put the keyword struct.
}

Maxwell Chen

Re: Regarding integration of two different projects

manish.patel29-Jan-08 21:27

manish.patel

29-Jan-08 21:27

Ok thats same as my problem.

Now i am posting my code

I am having two projects in one solution: one is Test1 and another one is Test2

Test1 having two files Test1.h and Test1.c

Test1.h

void testFunc();

Test1.c

<br />
#include "Test1.h"<br />
void testFunc()<br />
{<br />
printf("In Function testFunc()");<br />
}<br />

Now Test2 Having Two Files Test2.h and Test2.cpp

Test2.h

<br />
class Test2<br />
{<br />
Test2();<br />
}<br />

Test2.cpp

<br />
#include "Test2.h"<br />
#include "Test1.h"<br />
<br />
Test2::Test2()<br />
{<br />
testFunc();<br />
}<br />

Now i am compiling Test1 by c Compiler and Test2 by c++ compiler in "VS2005"

so it is giving me linking error as below:

error LNK2019: unresolved external symbol _testFunc referenced in function "public: __thiscall Test2::Test2(void)" (??0Test2@@QAE@XZ)

So do you have any idea regarding this??

Please Give me any idea, i am stuck on it.

Manish Patel.
B.E. - Information Technology.

Re: Regarding integration of two different projects

Maxwell Chen29-Jan-08 21:52

Maxwell Chen

29-Jan-08 21:52

I just created two project:
1. C:\Tmp\Test1, in C,
2. C:\Tmp\Test2, in C++.

Test2 uses Test1 functions.

Steps:
1. Compile Test1 without worrying about Test2 at all.
2. Write this way in "Test2.cpp" :

#include "test2.h"
extern "C" {
  #include "../test1/test1.h"
}

3. Remember to add (to import, not file copy) "C:\Tmp\Test1\test1.c" and "C:\Tmp\Test1\test1.h" into your "test2" project.

And everything compiles happily!

Maxwell Chen

Re: Regarding integration of two different projects

manish.patel30-Jan-08 0:15

manish.patel

30-Jan-08 0:15

Thanks

Its working fine.!!!!

Manish Patel.
B.E. - Information Technology.

Re: Regarding integration of two different projects

Maxwell Chen30-Jan-08 1:09

Maxwell Chen

30-Jan-08 1:09

Maxwell Chen

the confusing term page file

George_George29-Jan-08 17:04

George_George

29-Jan-08 17:04

Hello everyone,

On Windows Server 2003, task manager there is a term called PF (Page File) and it has a related curve. Task manager also has another term called commit charge.

1. I think PF is the same as commit charge. Previously, I think Page File only includes the paged-out pages which physical memory can not contain, and the pages are not in memory are counted as PF. Now I think I am wrong and PF includes all committed pages, including the ones in memory and the ones on disk;

2. Even if the pages are marked as COMMIT, it is not always counted as a part of PF in some situations before it is actually used (request for zero and copy-on-write scenarios);

Are my understandings of (1) and (2) correct?

thanks in advance,
George

std::exception and STL

George_George29-Jan-08 16:42

George_George

29-Jan-08 16:42

Hello everyone,

It is correct to assume that all exceptions from STL are either std::exception itself or derived class from std::exception?

thanks in advance,
George

Re: std::exception and STL

Stephen Hewitt29-Jan-08 18:30

Stephen Hewitt

29-Jan-08 18:30

Yes

Steve

Re: std::exception and STL

George_George29-Jan-08 18:42

George_George

29-Jan-08 18:42

Thanks Stephen,

My question is answered.

regards,
George

help

gentleguy29-Jan-08 14:20

gentleguy

29-Jan-08 14:20

dear all

how to solve this problem: i initialize xx[10][3][4] = (double)rand()/RAND_MAX; in main function,
and define this function, when i call this function, why it has problem?

void Centroids::createPosition(double x[10][3][4])
{

cout <<endl<<The following is positions of 10 particles ! "<<endl<<endl;

for (int i = 0; i < 10; i++)
{
cout <<endl<<" "<<"Position of particle :"<<endl;

for (int j = 0; j< 3; j++)
{
for (int k = 0; k < 4; k++)

cout<< " "<<x[i][j][0]<<" "<<x[i][j][1]<<" "<<x[i][j][2]<<" "<<x[i][j][3]<<endl;

}
}
}
coulndn't display correctly..thanks

Li Zhiyuan

5/10/2006

Re: help

Maxwell Chen29-Jan-08 16:22

Maxwell Chen

29-Jan-08 16:22

li zhiyuan wrote:
for (int k = 0; k < 4; k++)
cout<< " "<<x[i][j][0]<<" "<<x[i][j][1]<<" "<<x[i][j][2]<<" "<<x[i][j][3]<<endl;

You are using k to iterate, but there is no k in the [].

Maxwell Chen

Multiple Application Serialization

perrin486929-Jan-08 13:42

perrin4869

29-Jan-08 13:42

Hi, I'm currently learning MFC, and I have a question about serialization.
If I have an application, and I use it to serialize a file, can I use a second application to open the same file (of course, both applications having the same attributes in their documents)? Every time I try to call the Serialize method of a CTypedPtrList with the corresponding CArchive I get an "Unexpected File Format" error. Both applications are using the same DLLs, which contain the polymorphic classes being used in the list. I am using Visual Studio 2008.

Thanks.

Re: Multiple Application Serialization [modified]

CPallini29-Jan-08 21:44

CPallini

29-Jan-08 21:44

Perrin01 wrote:
If I have an application, and I use it to serialize a file, can I use a second application to open the same file (of course, both applications having the same attributes in their documents)?

AFAIK, yes
[added]
I made a little test: it confims you can do it.
[/added]

Perrin01 wrote:
Every time I try to call the Serialize method of a CTypedPtrList with the corresponding CArchive I get an "Unexpected File Format" error. Both applications are using the same DLLs, which contain the polymorphic classes being used in the list. I am using Visual Studio 2008.

I think you have to proceed with little steps, for instance.
(1) Make sure that both applications use the same version number inside IMPLEMENT_SERIAL macro.
(2) Make sure the application that created file is able itself to load it.
(3) Try to store and load very simple files first.
(4) ...

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

modified on Wednesday, January 30, 2008 4:24:19 AM

Re: Multiple Application Serialization

Mark Salsbery30-Jan-08 7:06

Mark Salsbery

30-Jan-08 7:06

CTypedPtrList is serializable?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Multiple Application Serialization

James R. Twine30-Jan-08 7:19

James R. Twine

30-Jan-08 7:19

Sure! But the pointers in it are another story... Laugh | :laugh:

Peace!

-=- James
Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Re: Multiple Application Serialization

Mark Salsbery30-Jan-08 7:32

Mark Salsbery

30-Jan-08 7:32

I have doubt

Laugh | :laugh:

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Multiple Application Serialization

CPallini30-Jan-08 21:14

CPallini

30-Jan-08 21:14

Well, everything is serializable Poke tongue | ;-P

(Uhm, I've a little doubt about democracy...), with just a bit effort into.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

ReadDirectoryChangesW vs FindFirstFile (on file server hosting mac file system)

Peter Weyzen29-Jan-08 12:58

Peter Weyzen

29-Jan-08 12:58

I have a case where a file path reported by ReadDirectoryChangesW is different from the correct path...

The case is a file server -- where a mac file system is hosted on an ntfs volume. The mac file system seems to have some extra stuff.

When I access the files locally (from the file server), I run into some problems:

Here's a very long filename reported from the system file change via ReadDirectoryChangesW()

C:\dev\macbug1\.BAHC3Kq7\This is the Mac folder\In this folder I will store some mac image files\this is just a folder with a long filename  - In this folder I will store some mac image files\another In this folder I will store some mac image files\This folder contains some pictures of the new cooooooool  macboc air\overview_bigair_one20080115.png

This very long path contains a folder which doesn't seem to actually be there... .BAHC3Kq7\

If I use FindFirstFile I can correctly find the files and folders as they seem to be there.
But this contradicting path from the changes API is causing me problems.

Any thoughts out there?

Are there any good references on the insides of how a mac file system is stored on NTFS?

Thanks in advance -- this is such an esoteric question, I won't hold my breath waiting for an answer.
But it's always good to ask!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<a href="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</a>

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