Re: Read in, write out RTF - C / C++ / MFC Discussion Boards

Ming Luo11-Apr-06 5:04

11-Apr-06 5:04

Hi all:
I am doing a OpenGL project. I want to create a function tracking the mouse motion so that the object in the window can spin or rotate according the mouse motion. I know there is a

void glutMotionFunc(void (*func)(int x, int y));

registration function. Does anybody know how to achieve the functionality please?
Thanks in advance!!!

Asura

Video For Windows capSetCallbackOnFrame Question

YaronNir11-Apr-06 4:55

YaronNir

11-Apr-06 4:55

Hi all,

I am using VFW.
I know i can set a call back message capSetCallbackOnFrame and then receive the callbak in:

LRESULT CALLBACK FrameCallbackProc(HWND hWnd, LPVIDEOHDR lpVHdr)

where lpVHdr->lpData is the buffer containing the video information to be shown(drawn)

my question is how do i add a drawing to that video? i want to see the captured frame from my webcam and ontop of that i want to draw something....

can any1 show me piece of code for that?

thanks in advanced

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: Video For Windows capSetCallbackOnFrame Question

9ine11-Apr-06 5:46

9ine

11-Apr-06 5:46

I'd like to capture video from usb cam, what's the VFW?

9ine

Re: Video For Windows capSetCallbackOnFrame Question

YaronNir15-Apr-06 20:55

YaronNir

15-Apr-06 20:55

VFW is Video For Windows, check out MSDN for more information and also visit this url

http://www.codeguru.com/Cpp/misc/misc/video/article.php/c3771[^]

Ask not what your application can do for you,
Ask what you can do for your application

Problem with DT_WORDBREAK

QuickDeveloper11-Apr-06 4:33

QuickDeveloper

11-Apr-06 4:33

hi
I am Working on a printing issue in MFC.I want the header to be printed in multiple lines.so I am using DT_WORDBREAK.It works fine when the string contains spaces(eg:1.Sample Print1 2.Sample Print2.....) but when the string contains no spaces the output is clipped at both ends
(eg input :1.SamplePrint12.SamplePrint2.....).

the output I am getting as follows:
mplePrint12.Sample
rint2.Sampl

the code I used is as follows
pDC->DrawText(String,rectArea, DT_CENTER | DT_WORDBREAK);

what could be the problem?Can anyone clearly explain me the functionality of DT_WORDBREAK.Am I using it in the correct way?

"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"

Re: Problem with DT_WORDBREAK

-Dy11-Apr-06 5:35

-Dy

11-Apr-06 5:35

DT_WORDBREAK forms word breaks on whitespace (space, new line and tab chars), which your string doesn't contain.

See this: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/fontext_0odw.asp[^]

You could use CDC::GetTextExtent to try and work out where you could insert space chars into your string to get DT_WORDBREAK to function as you would like.

- Dy

Read in, write out RTF

DanYELL11-Apr-06 4:17

DanYELL

11-Apr-06 4:17

I can read in a notepad file in entirety, store it in a CString,
and then write it out. I cant do the same for a file in rich text
format. For some reason, I dont get all of the file and when I
write it out and then launch it, it shifted around. Any idea on
how to read in an entire RTF file to a CString and then write it
out?

I put together this code:

CString str; char c;

ifstream In("c:\file.rtf");
while (In)
{
In >> c;
if (In) str += c;
}

In.close();

ofstream Out("c:\\file1.rtf");

int len = str.GetLength();

for (int i=0; i

Re: Read in, write out RTF

David Crow11-Apr-06 5:09

David Crow

11-Apr-06 5:09

DanYELL wrote:
I cant do the same for a file in rich text
format. For some reason, I dont get all of the file...

Probably because of the embedded '\0' characters (when using a CString object).

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Read in, write out RTF

Trollslayer11-Apr-06 5:21

Trollslayer

11-Apr-06 5:21

Try with a CFile:
1. Open the file
2. Allocate a buffer based on the file length
3. Read into the buffer.
4. Close the file.
5. Write the buffer to another file.
6. Delete the buffer.

This doesn't care about embedded nulls.

The tigress is here Big Grin | :-D

Re: Read in, write out RTF

DanYELL11-Apr-06 12:59

DanYELL

11-Apr-06 12:59

I think your right that CFile is the solution. I sincerely appreciate
your feedback. My only remaining question is, how can I efficiency
read the entire file into a CString or something other than a buffer.
I have:

char buf[50001];

CFile cfFile ("C:\\Gille.RTF", CFile::modeNoTruncate | CFile::modeRead);

cfFile.Read(buf, 50000);

// open

CFile f;
CFileException e;
char* pFileName = "c:\\Gille2.rtf";
if( !f.Open( pFileName, CFile::modeCreate | CFile::modeWrite, &e ) )
{
#ifdef _DEBUG
afxDump << "File could not be opened " << e.m_cause << "\n";
#endif
}

f.Write(buf, 50000);

The

char buf[50001];

is really bad. I had char buf[501]; and that wasnt big enough for a
1-page file. So I made it bigger. Is there a way to read in exactly
enough and to make the buffer the exact size? Also, what happens if
I read in a 10-page RTF file? How big can a buffer get?

Please, any response you can give me will be greatly appreciated.

Sincerely,
Danielle Brina (an overworked graduate student)

Re: Read in, write out RTF

DanYELL11-Apr-06 13:37

DanYELL

11-Apr-06 13:37

I know I can use:

cfFile.GetLength();

How can I not use a buffer and instead use something else like
a CString?

Re: Read in, write out RTF

dabs11-Apr-06 14:15

dabs

11-Apr-06 14:15

Probably something like:

CString strFileContents;
int nLen = cfFile.GetLength( );
LPTSTR pszBuffer = strFileContents.GetBufferSetLength( nLen + 1 );
cfFile.Read( pszBuffer, nLen );
strFileContents.ReleaseBuffer( );

Note: I didn't run this through a compiler, expect bugs Smile | :)

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Re: Read in, write out RTF

Trollslayer11-Apr-06 22:51

Trollslayer

11-Apr-06 22:51

CStrings use null terminators, use a char[] or TCHAR[].

The tigress is here Big Grin | :-D

Idea about => fun(CString str, ...)

Andy Rama11-Apr-06 3:43

Andy Rama

11-Apr-06 3:43

Hi,
Please give me idea about the function that are declared as follows,
void fun(CString str, ...);

Can I get total no. of strings (arguments) passed to th function?
Also, when I use char instead of CString as arguments data type; it's not working properly.

Thanks.

Re: Idea about => fun(CString str, ...)

toxcct11-Apr-06 3:49

toxcct

11-Apr-06 3:49

if you use ellipsis, then it is more a C function. if so, don't use C++ objects.
if you use C++, then change the ellipsis into a linked list (like std::vector<>) to pass your variable list of parameters

Re: Idea about => fun(CString str, ...)

David Crow11-Apr-06 3:52

David Crow

11-Apr-06 3:52

Aniket Salunkhe wrote:
Can I get total no. of strings (arguments) passed to th function?

No, not unless you also specified a terminator.

Aniket Salunkhe wrote:
Also, when I use char instead of CString as arguments data type; it's not working properly.

Ok. Without showing the code snippet that does/does not work, what exactly are you hoping for?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Idea about => fun(CString str, ...)

Andy Rama11-Apr-06 22:31

Andy Rama

11-Apr-06 22:31

I am using following function. Is this a correct way?

int CMyListControl::insertItems(int argNo, CString strItem, ...)
{
CString strTemp[10];

LVITEM lvItem;
SetRedraw(FALSE);
lvItem.mask = LVIF_IMAGE | LVIF_TEXT;
lvItem.iItem = CurRow;
for(int i=0; i < argNo ;i++)
{
strTemp[i].Format("%s",*((&strItem)+i));

lvItem.iSubItem = i;
lvItem.pszText = (LPTSTR)(LPCTSTR)(strTemp[i]);

(i==0)?InsertItem(&lvItem):SetItem(&lvItem);
}

return(CurRow++);
}

But i dont want to use 'argNo' as an indiaction of no of 'CString' parameters passed to the function.
Even I failed to use 'char' string in place of 'CString'.

It is giving Error, if I want to use function as,
int CMyListControl::insertItems(int argNo, CString strItem, ..., int Row = -1)

How to Impersonate a Remote Machine.

kiran janaswamy11-Apr-06 3:39

kiran janaswamy

11-Apr-06 3:39

hi all,

i want to impersonate the Remote Machine. i am going this api's please see it.

LogonUser();
ImpersonateLoggedOnUser();
CopyFile();
RevertToSelf();
CloseHandle();

is this api's are correct to proceed and please provide your suggestions.

thanks,
uday.

uday kiran

Re: How to Impersonate a Remote Machine.

David Crow11-Apr-06 3:54

David Crow

11-Apr-06 3:54

Is the impersonation needed for CopyFile() to succeed?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

CEdit -> show messages in all languages.

Suyash11-Apr-06 3:30

Suyash

11-Apr-06 3:30

I need to enable a a single CEdit control to show messages from all the languages english, chinese, german, hindi etc, in other terms I wish to make edit control unicode enabled.
1. I create a unicode text(.txt) file, and enter characters from German language like "ÖÄß" etc, and few characters from hindi language "सवबहठ".
2. I read this file using CStdio class, and try to print these characters in my edit control, however i find that string shown on the edit control is "ÖÄß?????".

What am I missing ? what could be done to make it work correctly. Do I need to find a font which supports all the languages in the world and assign this font to my edit control ?

Thanks in advance!
Regards
Suyash

Re: CEdit -> show messages in all languages.

jayart11-Apr-06 6:06

jayart

11-Apr-06 6:06

I am trying the same thing. I tried changing the font of the edit ctrl for the current font for which the character belongs.
But this will make the string look like ÖÄß????? and then make it ???सवबहठ.
So I guess CEdit is of no help.
I tried CRichEdit Control. But this doesnt support unicode atall.
Can any one help?

Re: CEdit -> show messages in all languages.

Suyash12-Apr-06 1:13

Suyash

12-Apr-06 1:13

Arti,

I tried CRichEdit Control. by default it doesn't support unicode.

l_pWnd->Create( _T( "RichEdit20W" ), NULL, in_dwStyle,
in_rcRect, in_pParentWnd, in_nID );

please note "RichEdit20W" which makes the CRichEditControl unicode enabled, by default its "RichEdit"

hope it helps.

regards
suyash

disable/grey out date time picker

viperlogic11-Apr-06 3:23

viperlogic

11-Apr-06 3:23

i was wondering how do you grey-out / disable the date time picker, is there a flag that can be changed say using a send message?

i have my date time picker as a CDateTimeCtrl type

Re: disable/grey out date time picker

-Dy11-Apr-06 3:38

-Dy

11-Apr-06 3:38

Disable:

CDateTimeCtrl yourCtrl;
yourCtrl.EnableWindow(FALSE);

Enable:

CDateTimeCtrl yourCtrl;
yourCtrl.EnableWindow(TRUE); // sorry, this said FALSE before, should have read TRUE

CDateTimeCtrl derives from CWnd, which exposes the EnableWindow function, hence you can use EnableWindow on all CWnd derived objects

- Dy

-- modified at 9:45 Tuesday 11th April, 2006

Re: disable/grey out date time picker

RickyC11-Apr-06 3:38

RickyC

11-Apr-06 3:38

Did you try this?

GetDlgItem(IDC_YOUR_DATE_TIME_PICKER)->EnableWindow(FALSE);

regards!

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