C / C++ / MFC

30-Apr-07 20:51

hi guys,

DO anyone know what is the reason that i can only play avi file which is original in Microsoft, but when i import a avi format from external i cannot play it..

How can i play my avi in animation control by displaying it full on the screen?

Pls advice, am using VC++ 2003 MFC.

Thanks ..

Hamid_RT30-Apr-07 21:34

Hamid_RT

30-Apr-07 21:34

I think Animation Controls [^] will be helpful for you and also it has description of this control

WhiteSky

YUANGE30-Apr-07 21:52

30-Apr-07 21:52

Hi
thanks white sky..dun get what u mean.
The avi file i play can't be display full on the animation control box.
SOme avi file cannot even display on the animation control
Pls advice..

Thanks !!

Hamid_RT1-May-07 5:29

Hamid_RT

1-May-07 5:29

I said before use of MCI functions but you said I can't you them Animation control can show avi file that are standard

WhiteSky

Mark Salsbery1-May-07 6:01

Mark Salsbery

1-May-07 6:01

I also said before you'll probably need to use some other method (Windows multimedia, for example)
to get the flexibility you need. An animation control isn't going to do it.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

YUANGE2-May-07 7:02

2-May-07 7:02

Hi guys,

How do u write using MCI to open and open a avi file??
do i need to specify any box etc animation ctrl box??

Tks

Display Bitmap By adding resource VC++ 2003 MFC

Mark Salsbery2-May-07 9:40

Mark Salsbery

2-May-07 9:40

You can play the AVI to a window - Playing a Device[^]

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

YUANGE30-Apr-07 20:36

Re: Display Bitmap By adding resource VC++ 2003 MFC

30-Apr-07 20:36

Hi guys,

I have tried to add a bitmap on my picture control using the add resource method.

this is the code that i place on my button the display the bitmap.

void CPictureDlg::OnBnClickedOk()
{
// TODO: Add your control notification handler code here
CBitmap Bmp;
Bmp.LoadBitmap(IDB_BITMAP1);
m_pic.SetBitmap(Bmp);

}

However no picture was display on the picture control please advice..

Thanks in advance.

John R. Shaw30-Apr-07 21:14

John R. Shaw

30-Apr-07 21:14

Who is actually drawing the picture?
How does it know the picture has changed?

Try invalidating the window (or button) that is supposed to display the picture.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Re: Display Bitmap By adding resource VC++ 2003 MFC

YUANGE30-Apr-07 21:27

Re: Display Bitmap By adding resource VC++ 2003 MFC

30-Apr-07 21:27

Hi,

There is no drawing of picture involved,just one click on the button to display the bitmap.
However seem like the my source code is not working..
Pls advice.

Hamid_RT30-Apr-07 21:28

Hamid_RT

30-Apr-07 21:28

Set Bitmap to true on the property window of Button and use of global CBitmap,now what happens?

WhiteSky

Dynamic memory allocation revisited.

C_Zealot30-Apr-07 18:04

30-Apr-07 18:04

Hi all:

Say:

char *string = NULL, *buffer = NULL;
int string_len = 0;

fgets(buffer);
string_len = strlen(buffer);
buffer[string_len] = '\0';
string = malloc(string_len+1);
strncpy(string, buffer, string_len);

return string;

Is my codes correct?

Thank you

David Nash30-Apr-07 18:38

David Nash

30-Apr-07 18:38

Its been a while since if coded in C, but did you allocate memory for buffer?

You should free the memory allocated for string as well.

regards,
David
http://users.bigpond.net.au/programming

C_Zealot30-Apr-07 19:34

30-Apr-07 19:34

That is what confuses me, David.

This is what I thought:

I have to put the string I read into somewhere (e.g. into a buffer) before I can use strlen() to get the length of the string.

Is there another way to accomplish this task? E.g. how do I know the length of the string I read before I put it to a buffer?

Thanks

Eytukan30-Apr-07 19:25

Eytukan

30-Apr-07 19:25

But where do you allocate memory for *buffer?
What about this:

    char* buffer = new char[10];
gets(buffer);
char* st=buffer;
printf("%s %s",st,buffer);
delete buffer;

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

C_Zealot30-Apr-07 19:37

30-Apr-07 19:37

Hi VuNic:

Thank you for your reply.

I am still wondering if there is a way for me somehow get the length of the word I will read without declaring a pointer (buffer) which points to a char array of certain length?

Thank you

Eytukan30-Apr-07 20:37

Eytukan

30-Apr-07 20:37

Are you supposed to stick to "C" ? or you have the option of using std::string s?
why not use them? or you need to go for linked lists. like :

typedef struct stringz
	{
		char c;
		struct stringz* next;
	}st;
	st* str =(st*)malloc(sizeof(stringz));
	st* head = str;
	char c;
	while(c=getch())
	{
		if(c==13)
			break;
		str->c=c;
		printf("%c",str->c);
		str->next=(st*)malloc(sizeof(stringz));
		str=str->next;
		
	}
	str->next=NULL;

//Print
	str =head;
	while(str->next!=NULL)
	{
		printf("%c",str->c);
		str=str->next;
	}

purely dynamic Roll eyes | :rolleyes:

, hey but never mess up trying your own stringz!. If allowed, I suggest you go with std::string.

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

C_Zealot30-Apr-07 20:39

30-Apr-07 20:39

Thank you VuNic.

John R. Shaw30-Apr-07 22:37

John R. Shaw

30-Apr-07 22:37

Uhmmm – No!

To use standard C functions – you need to provide the size of the buffer. C does not create or expand buffers for you – you have to request them manually. Normally you can get away with allocating a buffer that is as large as or larger than you expect to need and just make the call one time.

Off the top of my head, if you need something that resembles dynamic allocation in C:

typedef struct st_MyStringBuffer
{
    size_t length;
    char* buffer;
} MyStringBuffer;

int MyBuffer_Init(MyStringBuffer* pMine)
{
    if( pMine )
    {
        memset(pMine, 0, sizeof(MyStringBuffer)); /* clear it */
        return(1);
    }
    return(0);
}

void MyBuffer_Free(MyStringBuffer* pMine)
{
    if( pMine )
    {
        free(pMine->buffer);
        MyBuffer_Init(pMine); /* clear it */
    }
}

char* MyBuffer_AddString(MyStringBuffer* pMine, const char* pStr)
{
    size_t len;
    if( !pMine || !pStr )
        return(NULL); /* error */

    len = strlen(pStr) + 1; /* +1 for '\0' */
    if( !pMine->buffer )
    {
        pMine->buffer = malloc(len);
        if( !pMine->buffer )
            return(NULL); /* error */
        pMine->buffer[0] = '\0'; /* required because of strcat() latter */
        pMine->length = len;
    }
    else
    {
        len += pMine->length; /* new buffer length */
        if( !realloc(pMine->buffer, len) ) /* expand buffer */
            return(NULL); /* error */
        pMine->length = len;
    }
    return strcat(pMine->buffer, pStr);
}

char* YourFunction(/* your arguments */)
{
    char temp_buffer[256];
    MyStringBuffer my_string_buffer;
    MyBuffer_Init(my_string_buffer);
    while( fgets(temp_buffer, 256, file_ptr) )
    {
        if( !MyBuffer_AddString(my_string_buffer, temp_buffer) )
        {
            MyBuffer_Free(my_string_buffer);
            break;
        }
    }
    /* since we are passing ownership to calling function
    ** we do not need to worry about free it here. */
    return( my_string_buffer->buffer );
}

Well that was fun! Wink | ;)

Of course you could eliminate MyStringBuffer and just do esentially the same thing it does in your function. The advantage of a method like this is that now you can reuse MyStringBuffer any where you need to use that functionality, without having to rewrite it each time.

Any way I did not test the code, so I do not know if it works as expected.

Study the code and try to figure out what it is doing and why.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

C_Zealot30-Apr-07 22:40

30-Apr-07 22:40

Thank you

scanf () loop question.

C_Zealot30-Apr-07 17:24

Re: scanf () loop question. Question withdrawn

30-Apr-07 17:24

Hi:

I wanted to read whatever I receive from stdin to stdout and quit the program. Below is my function:

while(scanf("%s", buffer) != EOF) {
for (i = 0; i < strlen(buffer); i++) {
buffer[i] = tolower(buffer[i]);
}
printf("%s ", buffer);
}

The function actually keeps looping forever. It does echo whatever from stdin to stdout, but it does not quit after one go. I am wondering why?

Thank you.

C_Zealot30-Apr-07 17:51

Re: scanf () loop question. Question withdrawn

30-Apr-07 17:51

Question withdrawn. I have found a solution.

Eytukan30-Apr-07 21:58

Eytukan

30-Apr-07 21:58

C_Zealot wrote:
I have found a solution

what was it? Unsure | :~

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

Re: scanf () loop question. Question withdrawn

C_Zealot30-Apr-07 22:29