C / C++ / MFC Discussion Boards

softwaremonkey3-Mar-11 11:39

3-Mar-11 11:39

Hi,

I have a project which I originally built as an MFC extension DLL using Visual Studio 2008 App Wizard. I would now like to be able to build the same project as a static library but I don't know how to do this.

Ideally, I would like to retain both DLL and static builds.

Can anyone please advise?

thanks Tony

Thumbs Up | :thumbsup:

Re: Adding a static library build

Andrew Brock3-Mar-11 16:06

Andrew Brock

3-Mar-11 16:06

In the toolbars at the top there is the configuration boxes, 1 containing Debug or Release and the other containing Win32. Drop down either of those boxes and select Configuration Manager.

From the Configuration Manager you can add extra configurations to each individual project.
Select the configuration (debug or release) next to your MFC DLL project and select <new> from the dropdown. Call it Static Debug (or anything else if you feel like it) and then change Copy settings from: to Debug.
Repeat again for Release, calling it Static Release.
If you want to change the default configuration from DLL to static LIB then you can change the Configuration type for the MFC DLL in the Configuraion Manager that is to be build with the Debug and Release compiles.
Close the Configuration Manager.

Now right click on the MFC DLL project in the solution explorer and select Project Properties.
Change the configuration at the top of the properties box to Static Debug, then go to the General page from the list at the left. change Configuration Type to Static Library.
Do the same for Static Release.

You may need to change a few other things as well, there is probably a definition in the C++>Preprocessor page for DLL or something that you will need to get rid of.

Re: Adding a static library build

softwaremonkey3-Mar-11 19:44

softwaremonkey

3-Mar-11 19:44

Thanks Andrew, this is exactly the information I needed. Thumbs Up | :thumbsup:

Tony

Recursive CFileFind problem [modified]

Mr_Gbg3-Mar-11 6:43

Mr_Gbg

3-Mar-11 6:43

I have a recursive CountFiles function that I just can't get to work properly. It counts all files in all directories under a given root. But when I run it it allways returns somewhat less nr of files than expected. I suspect I've made a logical dive somewhere, but I just can't see it! Cry | :((

The code below is supposed to return 13.301 files for my image library, but comes with 12.110... Can anybody see what my mistake is?? Rose | [Rose]

int CBackupImagesDlg::CountFiles(const CString strRoot) 
{
	int count=0;
	CFileFind f;
	CString strDir = strRoot;
	strDir +=+ _T("\\*");
	CString csNewPath(_T(""));	
	
	if(f.FindFile(LPCTSTR(strDir)))
	{
		
		while(f.FindNextFile() )
		{
			BOOL bDir=f.IsDirectory();
			BOOL bDot=f.IsDots();
			csNewPath = f.GetFilePath();
			if (bDot)
				continue;
			if(bDir)
			{
                             count=count + CountFiles(csNewPath);
			}
			else // not dot, not dir = count as file
			{
					count++;
			}
		}//while...

	}

	f.Close();
	return count;
}

modified on Thursday, March 3, 2011 12:56 PM

Re: Recursive CFileFind problem

Frank Seidler3-Mar-11 7:30

Frank Seidler

3-Mar-11 7:30

Hi!

You are missing 1 file per call to countfiles(). Simply move the while to the bottom of the loop to solve this.

if ( f.FindFile(LPCTSTR(strDir)))
{
   do 
   {
      ...
   }
   while ( f.FindNextFile() );
}

Regards

Frank

Re: Recursive CFileFind problem

David Crow3-Mar-11 8:07

David Crow

3-Mar-11 8:07

MSDN states that you must call FindNextFile() at least once before calling any other member function. Are you saying that's no longer required?

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Re: Recursive CFileFind problem

Luc Pattyn3-Mar-11 8:47

Luc Pattyn

3-Mar-11 8:47

Very strange indeed, MSDN[^] says certain functions require a FindNextFile being executed first, however as FindFile returns the first file, and FindNextFile finds the next ones, how could one execute those functions on the first file at all?

Anyway, the Win32 functions FindFirstFile, FindNextFile don't show such a remark, although here[^] is a note suggesting to call GetFileInformationByHandle(). So did the MFC guys ignore the note? or is it no longer relevant?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: Recursive CFileFind problem

David Crow3-Mar-11 9:08

David Crow

3-Mar-11 9:08

I've always coded my recursive CFileFind code as follows:

void ProcessFolder( LPCTSTR lpszPath )
{
    CString strPath(lpszPath);
    CFileFind fileFind;
  
    if (strPath.Right(1) != _T('\\'))
        strPath += _T('\\');
  
    BOOL bFound = fileFind.FindFile(strPath + _T("*.*"));
    while (bFound)
    {
        bFound = fileFind.FindNextFile();
  	
        if (fileFind.IsDirectory())
        {
            if (! fileFind.IsDots())
                ProcessFolder(fileFind.GetFilePath());
        }
	else
        {
            // file
        }
    }
}

It's worked for years like that.

Re: Recursive CFileFind problem

Luc Pattyn3-Mar-11 9:18

Luc Pattyn

3-Mar-11 9:18

you're right, I had to read once more to discover in MFC FindFile opens the search but does not return the first file, so FindNextFile is needed to find even the first file; this is different from how Win32 works, and IMO quite confusing (FindFile should have been named PrepareFileSearch or something similar).

This also means the first reply (by Frank) is wrong, and the wrong count hasn't been explained yet.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: Recursive CFileFind problem

Mr_Gbg3-Mar-11 21:57

Mr_Gbg

3-Mar-11 21:57

Thank you, David! Big Grin | :-D

I tried your code, and it works like a charm!!
I'm still not certain what was wrong with the original function, but that investigation has to wait for another day! Poke tongue | ;-P

Anyhow, thank you all for your help, David in perticular!

Re: Recursive CFileFind problem

David Crow3-Mar-11 8:05

David Crow

3-Mar-11 8:05

Mr_Gbg wrote:
The code below is supposed to return 13.301 files for my image library...

According to what?

Mr_Gbg wrote:
strDir +=+ _T("\\*");

What is +=+?

Mr_Gbg wrote:

if(f.FindFile(LPCTSTR(strDir)))

Why the superfluous cast?

Mr_Gbg wrote:
The code below is supposed to return 13.301 files for my image library, but
comes with 12.110... Can anybody see what my mistake is??[Rose]

To make sure your recursion logic is sound, you might try moving count outside of CountFiles(), either by making it global or a member variable.

Re: Recursive CFileFind problem

Mr_Gbg3-Mar-11 9:39

Mr_Gbg

3-Mar-11 9:39

Good Questions, both of them! Sloppy programming I guess is the answer. Fixed now, thanks!
I've tried the whole global count variable thing as well, I still can't see a way around this... Grrr! Dead | X|

Re: Recursive CFileFind problem

Luc Pattyn3-Mar-11 9:32

Luc Pattyn

3-Mar-11 9:32

what is telling you there would be 13.301 files?
and how many folders are there?

some ideas:
- hidden files (your code would see them all, or throw an exception, so can't really be that);
- maybe folders also count as files in the tool that said 13301;
- there may be something fishy with empty extensions;
- there might be a difference between * and *.*;
- there is something peculiar (and silly) in the way Windows treats wildcards in extensions; I don't recall the details.
- I wouldn't be surprised if some of the above would depend on the actual file system (FAT, NTFS, ...).

I suggest you try your tool and your code on a pretty small set of files and folders, and experiment a bit.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Making the Disk Defragmenter a Modal dialog

dipuks3-Mar-11 6:17

dipuks

3-Mar-11 6:17

Hey

I am opening the Disk Defragmenter from inside my C++ WIN32 app using the ShellExecuteEx function.

Now i want to make sure that the Disk Defragmenter is a modal dialog, so that User is not able to click any part of my app.

I set one window to EnableWindow(FALSE), but there are other frame windows which can be clicked by User and then the Disk Defragmenter will go hiding or to back ground.

Is there one generic way of making the Disk Defragmenter a modal window so that nothing else on the back ground can be clicked?

From the ShellExecuteEx function, i can get the process handle to Disk Defragmenter.

Thanks in advance.

Re: Making the Disk Defragmenter a Modal dialog

Chris Meech3-Mar-11 6:39

Chris Meech

3-Mar-11 6:39

You can try blocking using the following

WaitForSingleObject(m_hProcess, INFINITE);  // m_hProcess is the DD process handle

This won't make DD modal, it will just block your app until DD is finished. Smile | :)

Chris Meech
I am Canadian. [heard in a local bar]

In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

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Re: Making the Disk Defragmenter a Modal dialog

Luc Pattyn3-Mar-11 7:37

Luc Pattyn

3-Mar-11 7:37

I think I know how to do so in .NET, and I assume unmanaged code could do similar things:
- give your app a modal form F, and make it sufficiently large to hold DD's main form;
- let that form F call DD and set DD's main form's parent to F. I assume this function[^] does that.

Now DD itself should behave as a modal dialog to your app.
I have a managed app (C#) that does similar things with e.g. MS Word.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Mac and IP address problem

trioum3-Mar-11 5:14

trioum

3-Mar-11 5:14

On my computer I have various network connection wi-fi , ethernet , USB . Now I want to know the mac address and IP address of the connection and the Active network i.e. which is enabled

Trioum

Re: Mac and IP address problem

David Crow3-Mar-11 5:33

David Crow

3-Mar-11 5:33

Have you experimented with GetAdaptersInfo(), GetInterfaceInfo(), GetAdaptersAddresses(), GetNumberOfInterfaces(), etc?

Re: Mac and IP address problem

trioum3-Mar-11 6:11

trioum

3-Mar-11 6:11

I tried but only able to get MAC address. not understand to get IP address and not able to find active network .

Trioum

Re: Mac and IP address problem

David Crow3-Mar-11 7:25

David Crow

3-Mar-11 7:25

trioum wrote:
not understand to get IP address and not able to find active network .

How about showing the code you used for this?

How to calculate to get new pixel color by mixing the alpha value with r, g and b value

Amrit Agr2-Mar-11 22:40

Amrit Agr

2-Mar-11 22:40

DWORD destRedColor   = 0;
DWORD destBlueColor  = 0;
DWORD destGreenColor = 0;
DWORD destAlphaColor = 0;
DWORD SrcRedColor     = 0;
DWORD SrcBlueColor    = 0;
DWORD SrcGreenColor   = 0;
DWORD SrcAlphaColor   = 0;
int src_const_alpha   = 0;

// After all the inits we can do the job : Replace Color
for ( int i = ( ( bm.bmWidth * bm.bmHeight ) - 1 ); i >= 0; --i )
 {
	COLORREF clrRef =  ptPixels[i]; //Bitmap pixel color taken with CreateDIBSection's void* lpBits;
	clrRef = COLORREF2RGB( clrRef );
        
        //taking alpha,red,green and blue values.
	DWORD redDest   = GetRValue( clrRef );
	DWORD greenDest = GetGValue( clrRef);
        DWORD blueDest  = GetBValue( clrRef);
	BYTE *ptrAlphaDest = reinterpret_cast<BYTE*>( &clrRef );
	DWORD alphaDest;
	alphaDest = ptrAlphaDest[0];

        //taking alpha,red,green and blue values.
	DWORD redSrc   = GetRValue( _cNewColor ); //Shadow Color ( of user's choice )
	DWORD greensrc = GetGValue( _cNewColor );
        DWORD blueSrc  = GetBValue( _cNewColor );
	BYTE *ptrAlphaSrc = reinterpret_cast<BYTE*>( &_cNewColor );
	DWORD alphaSrc;
	alphaSrc = ptrAlphaSrc[0];

	src_const_alpha  = int( m_intensity * 2.55 );
	SrcRedColor   = redSrc   * src_const_alpha / 255.0;
        SrcGreenColor = greensrc * src_const_alpha / 255.0;
	SrcBlueColor  = blueSrc  * src_const_alpha / 255.0;
	SrcAlphaColor = alphaSrc * src_const_alpha / 255.0;

        destRedColor   = SrcRedColor    + ( 1 - SrcAlphaColor ) * redDest;
	destGreenColor = SrcGreenColor  + ( 1 - SrcAlphaColor ) * greenDest;
	destBlueColor  = SrcBlueColor   + ( 1 - SrcAlphaColor ) * blueDest;
	destAlphaColor = SrcAlphaColor  + ( 1 - SrcAlphaColor ) * alphaDest;

	ptPixels[i]
	= (destAlphaColor << 24 ) |                       
	  (destRedColor   << 16 ) |  
	  (destGreenColor << 8  ) | 
	  (destBlueColor);
}

Re: How to calculate to get new pixel color by mixing the alpha value with r, g and b value

Richard MacCutchan3-Mar-11 2:08

Richard MacCutchan

3-Mar-11 2:08

I expect there is a question in here somewhere but I can't quite see it.

I must get a clever new signature for 2011.

Re: How to calculate to get new pixel color by mixing the alpha value with r, g and b value

Andrew Brock3-Mar-11 2:31

Andrew Brock

3-Mar-11 2:31

Perhaps elaborate on what you are trying to do so that we can help you better.

Also note that Bitmap pictures pad each scanline to a multiple of 4 bytes.
If your bitmaps are 32bit, then you can ignore this.
That is if your picture is 5 pixels wide, each pixel taking 3 bytes (24 bits) then each scanline would be 5 * 3 = 15bytes wide.
Since that is not a multiple of 4 some bytes (1 in this case) are added to align the next scanline.

Note: The MSDN page for BITMAP[^] says they are WORD (2 byte) aligned, but from previous experience I have found that they are DWORD (4 byte) aligned.

This means that you must iterate through bm.bmHeight, and then for each iteration of that, iterate through bm.bmWidth.

BYTE *pBitmapData = (BYTE *)XXX; //XXX is the value from CreateDIBSection
int nBytesPerPixel = bm.bmBitsPixel / 8;
for (int y = 0; y < bm.bmHeight; ++y) {
	for (int x = 0; x < bm.bmWidth; ++x) {
		COLORREF clrRef = *((COLORREF *)pBitmapData);
		//blend images somehow
		pBitmapData += nBytesPerPixel; //Simply skip to the next pixel
	}
	pBitmapData += (nBytesPerPixel * bm.bmHeight + 3) & 3; //Round up to the next DWORD.
}

Re: How to calculate to get new pixel color by mixing the alpha value with r, g and b value

Amrit Agr3-Mar-11 16:59

Amrit Agr

3-Mar-11 16:59

Actually there is one Picture In Picture( PIP ) module in the application. There is a shadow functionality is available with masking for the front layer. My mask( like heart shape ) is a bitmap file ( of 32 bpp ) which is put in the place of front layer( picture ). It's shadow looks like the same.

We can give shadow color of my choice as well( it is a provision ). Shadow will have selected color. So as it should be shown a transparent look I have used AlphaBlend() function to show transparent and semi-transparent pixels present in mask bitmap.

For the BLENDFUNCTION structure( m_blendfunc ) I given at Initialization
m_blendfunc.BlendOp = AC_SRC_OVER;
m_blendfunc.BlendFlags = 0;
m_blendfunc.SourceConstantAlpha = 0;
m_blendfunc.AlphaFormat = AC_SRC_ALPHA;

We can change the intensity of shadow as well( it's a provision ). It's rage from 0 to 100.

So that In OnPaint() I have changed the SCA value as per intenisty value.
m_blendfunc.SourceConstantAlpha = int( m_intensity * 2.55 );

As per the MSDN I have taken the red, green, blue and alpha value from Source( mask bitmap ) and mix up with destination colors ( of selected shadow color ) by this type of calculation

Src.Red = Src.Red * SourceConstantAlpha / 255.0;
Src.Green = Src.Green * SourceConstantAlpha / 255.0;
Src.Blue = Src.Blue * SourceConstantAlpha / 255.0;
Src.Alpha = Src.Alpha * SourceConstantAlpha / 255.0;
Dst.Red = Src.Red + (1 - Src.Alpha) * Dst.Red
Dst.Green = Src.Green + (1 - Src.Alpha) * Dst.Green
Dst.Blue = Src.Blue + (1 - Src.Alpha) * Dst.Blue
Dst.Alpha = Src.Alpha + (1 - Src.Alpha) * Dst.Alpha

The shadow is not getting proper it's look like some type of animation when I change the intesity.

Are I am making any mistake for taking source and destination colors or there is some mistake in calculation of new colors.

I have tried ur suggetsion of iterating through bitmap height & width but the result is same.

Unicode Representation and Transformation

pix_programmer2-Mar-11 21:48

pix_programmer

2-Mar-11 21:48

Hi!
How to represent Unicode strings? I want to enter e.g "UserName" in an XML file. How to represent the above string in the XML file using Unicode? I also have to read and display this string from C++ and display its Chinese and Korean representation. How to do this?

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