Re: Find ADS Files/Streams? - C / C++ / MFC Discussion Boards

MFC, My Picture Control has problem. [Solved]

yu-jian28-Sep-12 4:29

28-Sep-12 4:29

I use the CImage::Load() to load a png file,
and then use SetBitmap() to set this image to Picture Control.
I had define a CStatic member and use DDX_Control to bind this CStatic object to Picture Control. But when CDialog startup, no image shows.

There is a similiar issule about Picture Control. I use the Picture Control to display different button images. When mouse in different area of Picture Control, this control wil display a different image,
I had a initialized operator for this Picture Control, but why only after I use mouse to move in the Picture Control, then this image will show. I do not know any other code needed to written. After SubClassDlgItem().

modified 4-Oct-12 11:38am.

Re: MFC, My Picture Control has problem.

David Crow28-Sep-12 7:29

David Crow

28-Sep-12 7:29

Code snippet?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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Re: MFC, My Picture Control has problem.

jeron128-Sep-12 8:33

jeron1

28-Sep-12 8:33

I'll hazard a guess, maybe this link[^] might help.

Re: MFC, My Picture Control has problem.

yu-jian29-Sep-12 4:44

yu-jian

29-Sep-12 4:44

I resolved this problem. Because the CImage is a temperory object.
After change this CImage object to class member, it is OK.

Find ADS Files/Streams?

bosfan28-Sep-12 4:07

bosfan

28-Sep-12 4:07

Hi community,
i have a funktion to count files in a directory and its subdirectory, but how to count a ADS files, alternate da ta stream?
How to pas a path to FindFile() and FindNextFile() ??
I try to make a path from a visible file like:
"C:\visible.txt" to "C:\visible.txt:*.*" but this is not correct.
Does any one knows how to do this?

Thanks in advance
bosfan

Re: Find ADS Files/Streams?

Richard MacCutchan28-Sep-12 6:11

Richard MacCutchan

28-Sep-12 6:11

Your path should be something like:

C++

char* szPath = "C:\\directory\\*.ads";

You must always escape the special characters, such as backslash, in string constants in C/C++, by prefixing them with the escape character, which is a backslash. In your example you are escaping the first character (v) of the word visible.

One of these days I'm going to think of a really clever signature.

My Vote is 1

Smart Arab1-Oct-12 5:36

Smart Arab

1-Oct-12 5:36

ADS files is not file with ADS extension , it's :
windows alternate data streams.

ADS Files[^]

Re: Find ADS Files/Streams?

Smart Arab1-Oct-12 5:31

Smart Arab

1-Oct-12 5:31

Use this Code :
Streams.h

//
// return code type
//
typedef INT NTSTATUS;

//
// Check for success
//
#define NT_SUCCESS(Status) ((NTSTATUS)(Status) >= 0)

//
// The NT return codes we care about
//
#define STATUS_BUFFER_OVERFLOW           ((NTSTATUS)0x80000005L)

//--------------------------------------------------------------------
//     N T F S C O N T R O L F I L E   D E F I N I T I O N S
//--------------------------------------------------------------------

//
// Prototype for NtFsControlFile and data structures
// used in its definition
//

//
// Io Status block (see NTDDK.H)
//
typedef struct _IO_STATUS_BLOCK {
    NTSTATUS Status;
    ULONG Information;
} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;


//
// Apc Routine (see NTDDK.H)
//
typedef VOID (*PIO_APC_ROUTINE) (
				PVOID ApcContext,
				PIO_STATUS_BLOCK IoStatusBlock,
				ULONG Reserved
			);

//
// File information classes (see NTDDK.H)
//
typedef enum _FILE_INFORMATION_CLASS {
// end_wdm
    FileDirectoryInformation       = 1,
    FileFullDirectoryInformation, // 2
    FileBothDirectoryInformation, // 3
    FileBasicInformation,         // 4  wdm
    FileStandardInformation,      // 5  wdm
    FileInternalInformation,      // 6
    FileEaInformation,            // 7
    FileAccessInformation,        // 8
    FileNameInformation,          // 9
    FileRenameInformation,        // 10
    FileLinkInformation,          // 11
    FileNamesInformation,         // 12
    FileDispositionInformation,   // 13
    FilePositionInformation,      // 14 wdm
    FileFullEaInformation,        // 15
    FileModeInformation,          // 16
    FileAlignmentInformation,     // 17
    FileAllInformation,           // 18
    FileAllocationInformation,    // 19
    FileEndOfFileInformation,     // 20 wdm
    FileAlternateNameInformation, // 21
    FileStreamInformation,        // 22
    FilePipeInformation,          // 23
    FilePipeLocalInformation,     // 24
    FilePipeRemoteInformation,    // 25
    FileMailslotQueryInformation, // 26
    FileMailslotSetInformation,   // 27
    FileCompressionInformation,   // 28
    FileObjectIdInformation,      // 29
    FileCompletionInformation,    // 30
    FileMoveClusterInformation,   // 31
    FileQuotaInformation,         // 32
    FileReparsePointInformation,  // 33
    FileNetworkOpenInformation,   // 34
    FileAttributeTagInformation,  // 35
    FileTrackingInformation,      // 36
    FileMaximumInformation
// begin_wdm
} FILE_INFORMATION_CLASS, *PFILE_INFORMATION_CLASS;


//
// Streams information
//
#pragma pack(4)
typedef struct {
	ULONG    	        NextEntry;
	ULONG    	        NameLength;
	LARGE_INTEGER    	Size;
	LARGE_INTEGER    	AllocationSize;
	USHORT    	        Name[1];
} FILE_STREAM_INFORMATION, *PFILE_STREAM_INFORMATION;
#pragma pack()

Streams.c

#define UNICODE 1
#include <windows.h>
#include <stdio.h>
#include "streams.h"


//
// Native functions we use
//
NTSTATUS (__stdcall *NtQueryInformationFile)( 
    IN HANDLE FileHandle,
    OUT PIO_STATUS_BLOCK IoStatusBlock,
    OUT PVOID FileInformation,
    IN ULONG Length,
    IN FILE_INFORMATION_CLASS FileInformationClass
    );

ULONG (__stdcall *RtlNtStatusToDosError) (
		IN NTSTATUS Status
		);

//
// Globals
//
ULONG FilesWithStreams = 0;
ULONG FilesProcessed = 0;
ULONG DotsPrinted = 0;
BOOLEAN PrintDirectoryOpenErrors = FALSE;

//----------------------------------------------------------------------
//
// PrintNtError
//
// Formats an error message for the last native error.
//
//----------------------------------------------------------------------
void PrintNtError( NTSTATUS status )
{
	WCHAR *errMsg;

	FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
			NULL, RtlNtStatusToDosError( status ), 
			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
			(LPTSTR) &errMsg, 0, NULL );
	wprintf(L"%s\n", errMsg );
	LocalFree( errMsg );
}

//--------------------------------------------------------------------
//
// PrintWin32Error
// 
// Translates a Win32 error into a text equivalent
//
//--------------------------------------------------------------------
void PrintWin32Error( DWORD ErrorCode )
{
	LPVOID lpMsgBuf;
 
	FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
					NULL, ErrorCode, 
					MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
					(LPTSTR) &lpMsgBuf, 0, NULL );
	wprintf(L"%s\n", lpMsgBuf );
	LocalFree( lpMsgBuf );
}

//----------------------------------------------------------------------
//
// EnableTokenPrivilege
//
// Enables the load driver privilege
//
//----------------------------------------------------------------------
BOOL EnableTokenPrivilege( PTCHAR PrivilegeName )
{
    TOKEN_PRIVILEGES tp;
    LUID luid;
	HANDLE	hToken;
    TOKEN_PRIVILEGES tpPrevious;
    DWORD cbPrevious=sizeof(TOKEN_PRIVILEGES);

	//
	// Get debug privilege
	//
	if(!OpenProcessToken( GetCurrentProcess(),
				TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
				&hToken )) {
	
		return FALSE;
	}
	
    if(!LookupPrivilegeValue( NULL, PrivilegeName, &luid )) return FALSE;

    //
    // first pass.  get current privilege setting
    //
    tp.PrivilegeCount           = 1;
    tp.Privileges[0].Luid       = luid;
    tp.Privileges[0].Attributes = 0;

    AdjustTokenPrivileges(
            hToken,
            FALSE,
            &tp,
            sizeof(TOKEN_PRIVILEGES),
            &tpPrevious,
            &cbPrevious
            );

    if (GetLastError() != ERROR_SUCCESS) return FALSE;

    //
    // second pass.  set privilege based on previous setting
    //
    tpPrevious.PrivilegeCount       = 1;
    tpPrevious.Privileges[0].Luid   = luid;
    tpPrevious.Privileges[0].Attributes |= (SE_PRIVILEGE_ENABLED);
    AdjustTokenPrivileges(
            hToken,
            FALSE,
            &tpPrevious,
            cbPrevious,
            NULL,
            NULL
            );

    return GetLastError() == ERROR_SUCCESS;
}


//--------------------------------------------------------------------
//
// ProcessFile
//
// Queries a file to obtain stream information.
//
//--------------------------------------------------------------------
VOID ProcessFile( WCHAR *FileName, BOOLEAN IsDirectory, BOOLEAN Delete )
{
    PFILE_STREAM_INFORMATION  streamInfo, streamInfoPtr;
    ULONG    streamInfoSize = 0;
    BOOLEAN  printedFile = FALSE;
    NTSTATUS status;
    HANDLE   fileHandle;
    WCHAR    streamName[MAX_PATH];
    WCHAR    fullStreamName[MAX_PATH];
    IO_STATUS_BLOCK ioStatus;

    //
    // Open the file
    //
    fileHandle = CreateFile( FileName, GENERIC_READ,
					FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, 
					OPEN_EXISTING, 
					FILE_FLAG_BACKUP_SEMANTICS, 0 );
    if( fileHandle == INVALID_HANDLE_VALUE ) {

        if( !IsDirectory || PrintDirectoryOpenErrors ) {

            wprintf(L"\rError opening %s:\n", FileName );
            PrintWin32Error( GetLastError() );
        }
        return;
    }

    if( !(++FilesProcessed % 500)) {

        if( DotsPrinted == 3 ) {

            wprintf(L"\r     \r");
            DotsPrinted = 0;

        } else {
            DotsPrinted++;
            wprintf(L".");
        }
        fflush( stdout );
    }
    
    streamInfoSize = 16384;
    streamInfo = malloc( streamInfoSize );
    status = STATUS_BUFFER_OVERFLOW;
    while( status == STATUS_BUFFER_OVERFLOW ) {

        status = NtQueryInformationFile( fileHandle, &ioStatus,
                                         streamInfo, streamInfoSize,
                                         FileStreamInformation );
        if( status == STATUS_BUFFER_OVERFLOW ) {

            free( streamInfo );
            streamInfoSize += 16384;
            streamInfo = malloc( streamInfoSize );

        } else {

            break;
        }
    }

    //
    // If success, dump the contents
    //
    if( NT_SUCCESS( status ) && ioStatus.Information ) {

        streamInfoPtr = streamInfo;
        while( 1 ) {
            
            memcpy( streamName, 
                     streamInfoPtr->Name, 
                     streamInfoPtr->NameLength );
            streamName[ streamInfoPtr->NameLength/2 ] = 0;

            //
            // Skip the standard Data stream
            //
            if( wcsicmp( streamName, L"::$DATA" )) {

                if( !printedFile ) {
                    wprintf(L"\r%s:\n", FileName );
                    printedFile = TRUE;
                }

                if( Delete ) {

                    swprintf( fullStreamName, L"%s%s", FileName, streamName );
                    if( !DeleteFile( fullStreamName )) {

						wprintf(L"   Error deleting %s:\n", streamName );
						PrintWin32Error( GetLastError());
					} else {

						wprintf(L"   Deleted %s\n", streamName );
					}
                } else {

					wprintf(L"   %20s\t%I64d\n", streamName, streamInfoPtr->Size.QuadPart );
				}
            }

            if( !streamInfoPtr->NextEntry ) break;

            FilesWithStreams++;
            streamInfoPtr = (PFILE_STREAM_INFORMATION) ((char *) streamInfoPtr + 
                                                     streamInfoPtr->NextEntry );
        }

    } else if( !NT_SUCCESS( status )) {

        wprintf(L"\rError on %s: ", FileName );
        PrintNtError( status );
    }
    free( streamInfo );
    CloseHandle( fileHandle );
}



//--------------------------------------------------------------------
//
// ProcessDirectory
// 
// Recursive routine that passes files to the stream analyzing 
// function.
//
//--------------------------------------------------------------------
void ProcessDirectory( WCHAR *PathName, WCHAR *SearchPattern, 
                       BOOLEAN Recurse, BOOLEAN Delete )
{
	WCHAR			subName[MAX_PATH], fileSearchName[MAX_PATH], searchName[MAX_PATH];
	HANDLE			dirHandle, patternHandle;
	static BOOLEAN	firstCall = TRUE;
	WIN32_FIND_DATA foundFile;

	//
	// Scan the files and/or directories if this is a directory
	//
	if( firstCall ) {

		if( PathName[ wcslen( PathName ) - 1] == L'\\' ) {

			PathName[ wcslen( PathName ) - 1] = 0;
		}

		if( wcsrchr( PathName, '*' ) ) {
	
            if( wcsrchr( PathName, '\\' ) ) {

                swprintf( SearchPattern, wcsrchr( PathName, '\\' )+1 );
                wcscpy( searchName, PathName );
                wcscpy( wcsrchr( searchName, '\\')+1, L"*.*" );

            } else {
                
                swprintf( SearchPattern, PathName );
                wcscpy( searchName, PathName );
            }
            swprintf( fileSearchName, L"%s", PathName );

		} else {

			swprintf( SearchPattern, L"*.*" );
            if( Recurse ) {

                swprintf( searchName, L"%s\\*.*", PathName );
                swprintf( fileSearchName, L"%s\\*.*", PathName );
            } else {

                swprintf( searchName, L"%s", PathName );
                swprintf( fileSearchName, L"%s", PathName );
            }
		}

	} else {

		swprintf( searchName, L"%s\\*.*", PathName );
		swprintf( fileSearchName, L"%s\\%s", PathName, SearchPattern );
	}

	//
	// Process all the files, according to the search pattern
	//
	if( (patternHandle = FindFirstFile( fileSearchName, &foundFile )) != 
		INVALID_HANDLE_VALUE  ) {

		do {

			if( firstCall || (wcscmp( foundFile.cFileName, L"." ) &&
				wcscmp( foundFile.cFileName, L".." ))) {

				wcscpy( subName, searchName );
				if( wcsrchr( subName, '\\' ) ) 
					wcscpy( wcsrchr( subName, '\\')+1, foundFile.cFileName );
				else
					wcscpy( subName, foundFile.cFileName );

				//
				// Do this file/directory
				//
				ProcessFile( subName, 
                             (BOOLEAN) (foundFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY), 
                             Delete );
			}
		} while( FindNextFile( patternHandle, &foundFile ));
		FindClose( patternHandle );
	}

	//
	// Now recurse if we're supposed to
	//
	if( Recurse ) {

        if( firstCall && !wcsrchr( searchName, L'\\') ) {

            if( wcsrchr( searchName, L'*' )) {

                if( (dirHandle = FindFirstFile( L"*.*", &foundFile )) == 
                    INVALID_HANDLE_VALUE  ) {

                    //
                    // Nothing to process
                    //
                    return;
                }
            } else {

                if( (dirHandle = FindFirstFile( searchName, &foundFile )) == 
                    INVALID_HANDLE_VALUE  ) {

                    //
                    // Nothing to process
                    //
                    return;
                }
            }
        } else {

            if( (dirHandle = FindFirstFile( searchName, &foundFile )) == 
                INVALID_HANDLE_VALUE  ) {

                //
                // Nothing to process
                //
                return;
            }
        }
        firstCall = FALSE;

		do {

			if( (foundFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
				wcscmp( foundFile.cFileName, L"." ) &&
				wcscmp( foundFile.cFileName, L".." )) {

				wcscpy( subName, searchName );
				if( wcsrchr( subName, '\\' ) ) 
					wcscpy( wcsrchr( subName, '\\')+1, foundFile.cFileName );
				else
					wcscpy( subName, foundFile.cFileName );

				//
				// Go into this directory
				//
				ProcessDirectory( subName, SearchPattern, Recurse, Delete );

			}
		} while( FindNextFile( dirHandle, &foundFile ));
	}

	FindClose( dirHandle );
}


int Usage( WCHAR *ProgramName ) 
{
    wprintf(L"usage: %s [-s] [-d] <file or directory>\n", ProgramName );
    wprintf(L"-s     Recurse subdirectories\n");
    wprintf(L"-d     Delete streams\n\n");
    return -1;
}


int wmain( int argc, WCHAR *argv[] ) 
{
    BOOLEAN     recurse = FALSE, delete = FALSE;
    PWCHAR      filePart;
	WCHAR		volume[] = L"C:\\";
	DWORD		fsFlags;
    WCHAR       searchPattern[MAX_PATH];
	WCHAR		searchPath[MAX_PATH];
    int         i;

    

    if( argc > 1 ) {
        
        for( i = 1; i < argc; i++ ) {

            if( argv[i][0] != L'/' && argv[i][0] != L'-' ) {

                if( i != argc-1 ) {

                    wprintf( argv[i] );
                    return Usage( argv[0] );
                }
				continue;
            }

            if( argv[i][1] == L's' || argv[i][1] == L'S' ) {

                recurse = TRUE;

            } else if( argv[i][1] == L'd' || argv[i][1] == 'D' ) {

                delete = TRUE;

            } else return Usage( argv[0] );
        }
    } else {

        return Usage( argv[0] );
    }

    //
    // Enable backup privilege if we can
    //
    if( EnableTokenPrivilege( SE_BACKUP_NAME )) {

        PrintDirectoryOpenErrors = TRUE;
    }

    //
    // Load the NTDLL entry point we need
    //
	if( !(NtQueryInformationFile = (void *) GetProcAddress( GetModuleHandle(L"ntdll.dll"),
			"NtQueryInformationFile" )) ) {

		wprintf(L"\nCould not find NtQueryInformationFile entry point in NTDLL.DLL\n");
		exit(1);
	}
	if( !(RtlNtStatusToDosError = (void *) GetProcAddress( GetModuleHandle(L"ntdll.dll"),
							"RtlNtStatusToDosError" )) ) {

		wprintf(L"\nCould not find RtlNtStatusToDosError entry point in NTDLL.DLL\n");
		exit(1);
	}
	GetFullPathName( argv[argc-1], MAX_PATH, searchPath, &filePart );

	//
	// Make sure that its a FAT volume
	//
	if( searchPath[1] == L':' ) {

		fsFlags = 0;
		volume[0] = searchPath[0];
		GetVolumeInformation( volume, NULL, 0, NULL, NULL, &fsFlags, NULL, 0 );
		if( !(fsFlags & FILE_NAMED_STREAMS )) {

			wprintf(L"\nThe specified volume does not support streams.\n\n");
			exit(2);
		}
	}
    
    //
    // Now go and process directories
    //
    ProcessDirectory( searchPath, searchPattern, recurse, delete );

    if( !FilesWithStreams ) wprintf(L"No files with streams found.\n\n");
    return 0;
}

Re: Find ADS Files/Streams?

bosfan1-Oct-12 20:27

bosfan

1-Oct-12 20:27

Hi there,
thanks for help!

That is new for me.

Best Regards
bosfan

Re: Find ADS Files/Streams?

bosfan16-Oct-12 20:45

bosfan

16-Oct-12 20:45

Hi,
in this example i need a WDK installed, is this right?
Because VS 10 don't know a "NtQueryInformationFile" and i found on microsoft.com that i need "ntifs.h" to include for this? After all ntifs.h is on my system but now i can't find "windowsfamiliy.h" Frown | :(

Best wishes
bosfan

Has anybody tried the new C++ RAD Toolkit SmartDB (http://sdb.net.in)

sumeet12327-Sep-12 22:32

sumeet123

27-Sep-12 22:32

Can somebody try the new innovative C++ RAD Toolkit SmartDB (http://sdb.net.in[^]) and give some feedback.

Re: Has anybody tried the new C++ RAD Toolkit SmartDB (http://sdb.net.in)

Richard MacCutchan28-Sep-12 2:00

Richard MacCutchan

28-Sep-12 2:00

This is the wrong place for questions like this; why not try it yourself.

One of these days I'm going to think of a really clever signature.

MultiMon/Multi-VideoCards/Multi-Displays With Multiple DirectDraw FullScreen Exclusive Applications.

bowen198127-Sep-12 5:30

bowen1981

27-Sep-12 5:30

I've 2 nvidia video cards installed on my computer.
And each video card has 2 heads.

So I've got 4 monitors/displays:
display1 & display2 from card 1.
display3 & display4 from card 2.

Now I want to run 2 fullscreen|exclusive DirectDraw applications. each app bind to a different display.
e.g. App 1 bind to display 1 (card1)
App 2 bind to display 3 (card2)

I want to know if this is possible?
because now I am getting DDERR_EXCLUSIVEMODEALREADYSET while trying to SetCooperativeLevel in the second app.

but it's no problem if I run only one app, and bind to any of the 4 displays.

Re: MultiMon/Multi-VideoCards/Multi-Displays With Multiple DirectDraw FullScreen Exclusive Applications.

Ingo28-Sep-12 2:00

Ingo

28-Sep-12 2:00

bowen1981 wrote:
I want to know if this is possible?

Eh, not directly, I think.

bowen1981 wrote:
because now I am getting DDERR_EXCLUSIVEMODEALREADYSET while trying to SetCooperativeLevel in the second app.

Fullscreenmode in DirectX is always exclusive mode.

The only way I know, is to open two windows that are fullsize without titlebar and min-/maxboxes.

------------------------------
Author of Primary ROleplaying SysTem

How do I take my coffee? Black as midnight on a moonless night.
War doesn't determine who's right. War determines who's left.

Highlighting Control based on Selection

Don Guy27-Sep-12 3:52

Don Guy

27-Sep-12 3:52

Hey there

I have a C++ Windows application using Win32 API's. User can select a control (buttons, text box, drop down...) via using the TAB button on the key board. By default Windows does a drawing by which the selected control looks selected, but is it possible to make it more visible by a color change?

i.e., when the user selects a BUTTON can i make the color of the button change to blue or orange or something like that, thus giving a visual feeling that this is the control that's selected.

BTW, this is a Win32 API app, so which windows messages i need to check for this and make changes?

Thanks in advance

Re: Highlighting Control based on Selection

Jochen Arndt27-Sep-12 5:04

Jochen Arndt

27-Sep-12 5:04

There is no simple way to do this.

With some controls this may be achieved by changing the text and background colors.

For full customization you must use owner-drawn controls handling the WM_DRAWITEM notification.

You may browse the articles here for some examples (especially buttons[^]), but most of them are using MFC and not Win32.

Re: Highlighting Control based on Selection

Marius Bancila1-Oct-12 22:12

Marius Bancila

1-Oct-12 22:12

Yes. It is possible. You must create an owner-draw button, override CButton::DrawItem[^] and do the drawing of the button yourself. There are plenty of examples here:
Owner Draw Button Helper Class[^]
Unicode Owner Draw Button Control[^]
Irregular shaped buttons – owner drawn buttons made easy[^]

how to use the outside class

yu-jian27-Sep-12 3:18

yu-jian

27-Sep-12 3:18

There is a class A, in a outside library. Now I want to use the way of explicit load librar. I know that it needs to use LoadLibrary to load the dll and use the function GetProcAddress to get the function pointer if use outside function. But how to use the outside class.

Re: how to use the outside class

David Crow27-Sep-12 3:27

David Crow

27-Sep-12 3:27

One example[^]

Another[^]

Printing with CRichEditCtrl control

sdancer7526-Sep-12 23:05

sdancer75

26-Sep-12 23:05

Hi,

I am trying to print the content of the CRichEditCtrl. The problem is that when I want to use pagination (with A4 pages), the printed text (which is just 4 sample line with 40 chars at most) at the code

C++

lTextPrinted =FormatRange(&fr,TRUE);

is always lesser than the actual text pointed by the lTextLength variable making the loop run for ever. What is the problem with the following code ?

C++

CPrintDialog printDialog(false);


if (bShowPrintDialog)
{
    int r = printDialog.DoModal();
    if (r == IDCANCEL)
        return; // User pressed cancel, don't print.
}
else
{
    printDialog.GetDefaults();
}

HDC hPrinterDC = printDialog.GetPrinterDC();

CDC pMyPrinterDC;
pMyPrinterDC.Attach(hPrinterDC);





// This code basically taken from MS KB article Q129860

FORMATRANGE fr;
  int     nHorizRes = GetDeviceCaps(hPrinterDC, HORZRES);
  int     nVertRes = GetDeviceCaps(hPrinterDC, VERTRES);
  int     nLogPixelsX = GetDeviceCaps(hPrinterDC, LOGPIXELSX);
  int     nLogPixelsY = GetDeviceCaps(hPrinterDC, LOGPIXELSY);
  LONG    lTextLength;   // Length of document.
  LONG    lTextPrinted;  // Amount of document printed.

 // Ensure the printer DC is in MM_TEXT mode.
  SetMapMode ( hPrinterDC, MM_TEXT );

 // Rendering to the same DC we are measuring.
  //ZeroMemory(&fr, sizeof(fr));
  fr.hdc = pMyPrinterDC.m_hDC;
  fr.hdcTarget = pMyPrinterDC.m_hDC;

  // Get the page width and height from the printer.
  long lPageWidth =  ::MulDiv(pMyPrinterDC.GetDeviceCaps(PHYSICALWIDTH), 1440, pMyPrinterDC.GetDeviceCaps(LOGPIXELSX));
  long lPageHeight = ::MulDiv(pMyPrinterDC.GetDeviceCaps(PHYSICALHEIGHT), 1440, pMyPrinterDC.GetDeviceCaps(LOGPIXELSY));
  CRect rcPage(0, 0, lPageWidth, lPageHeight);

  SetTargetDevice(hPrinterDC,lPageWidth);

  fr.rc = rcPage;
  fr.rcPage = rcPage;


 // Default the range of text to print as the entire document.
  fr.chrg.cpMin = 0;
  fr.chrg.cpMax = -1;
  this->FormatRange(&fr,TRUE);

 // Set up the print job (standard printing stuff here).
  DOCINFO di;
  ZeroMemory(&di, sizeof(di));
  di.cbSize = sizeof(DOCINFO);

  di.lpszDocName = "GnosisExplorerNotes";

  // Do not print to file.
  di.lpszOutput = NULL;

// Update the display with the new formatting.
  RECT rcClient;
  GetClientRect(&rcClient);
  DisplayBand(&rcClient);

 // Start the document.
  StartDoc(hPrinterDC, &di);

 // Find out real size of document in characters.
 lTextLength = GetTextLength();//SendMessage ( /*hRTFWnd,*/ WM_GETTEXTLENGTH, 0, 0 );
 //lTextLength = ::SendMessage (this->m_hWnd, WM_GETTEXTLENGTH, 0, 0);

 do {
     // Start the page.
     StartPage(hPrinterDC);

    // Print as much text as can fit on a page. The return value is
     // the index of the first character on the next page. Using TRUE
     // for the wParam parameter causes the text to be printed.

    //lTextPrinted = ::SendMessage (this->m_hWnd, EM_FORMATRANGE, FALSE, (LPARAM)&fr);
    lTextPrinted =FormatRange(&fr,TRUE);

    DisplayBand(&fr.rc );

    // Print last page.
    EndPage(hPrinterDC);

    // If there is more text to print, adjust the range of characters
     // to start printing at the first character of the next page.
    if (lTextPrinted < lTextLength)  {
        fr.chrg.cpMin = lTextPrinted;
        fr.chrg.cpMax = -1;
    }

  } while (lTextPrinted < lTextLength);

 // Tell the control to release cached information.
  FormatRange(NULL,false);
 //SendMessage( EM_FORMATRANGE, 0, (LPARAM)NULL);

 EndDoc (hPrinterDC);

  ///////

DeleteDC(hPrinterDC);
pMyPrinterDC.DeleteDC();

sdancer75

Re: Printing with CRichEditCtrl control

sdancer755-Oct-12 3:55

sdancer75

5-Oct-12 3:55

I ended up that the RichEditCtrl version 2 causes this problem.

Using RichEditCtrl version 1 it works fine.

Any solution ?

I am attaching the source code. Please check that the lTextPrinted is always lesser than lTextLength.

https://rapidshare.com/files/2018160716/RichEditDlg.zip[^]

sdancer75

modified 5-Oct-12 10:20am.

Re: Printing with CRichEditCtrl control

chaau7-Oct-12 18:44

chaau

7-Oct-12 18:44

Here is the code that prints very well:

C++

// this code is taken from Vadim Z.'s article RTF based Tooltips
// www.codeguru.com
//----------------------------------------------------------------------------
// Function CMyRichEditCtrl::Print
// @func    print the rich edit control content
// @parm    bool  | bShowPrintDialog | show the dialog box CPrintDialog
//----------------------------------------------------------------------------
// @todo 
//----------------------------------------------------------------------------
void CSpscRichEditCtrl::Print(bool bShowPrintDialog, CWnd* pParent /*=NULL*/)
{
  CPrintDialog printDialog(false, PD_ALLPAGES | PD_USEDEVMODECOPIES | PD_NOPAGENUMS
      | PD_HIDEPRINTTOFILE | PD_NOSELECTION, pParent);

  if (bShowPrintDialog)
  {
    int r = printDialog.DoModal();
    if (r == IDCANCEL)
      return; // User pressed cancel, don't print.
  }
  else
  {
    printDialog.GetDefaults();
  }

  HDC hPrinterDC = printDialog.GetPrinterDC();

  // This code basically taken from MS KB article Q129860 

  FORMATRANGE fr;
  int    nHorizRes = GetDeviceCaps(hPrinterDC, HORZRES);
  int    nVertRes = GetDeviceCaps(hPrinterDC, VERTRES);
  int     nLogPixelsX = GetDeviceCaps(hPrinterDC, LOGPIXELSX);
  int     nLogPixelsY = GetDeviceCaps(hPrinterDC, LOGPIXELSY);
  LONG        lTextLength;   // Length of document.
  LONG        lTextPrinted;  // Amount of document printed.

  // Ensure the printer DC is in MM_TEXT mode.
  SetMapMode ( hPrinterDC, MM_TEXT );

  // Tell the control to release cached information.
  FormatRange(NULL,false);      

  // Rendering to the same DC we are measuring.
  ZeroMemory(&fr, sizeof(fr));
  fr.hdc = fr.hdcTarget = hPrinterDC;

  // Set up the page.
  fr.rcPage.left     = fr.rcPage.top = 0;
  fr.rcPage.right    = (nHorizRes/nLogPixelsX) * 1440;
  fr.rcPage.bottom   = (nVertRes/nLogPixelsY) * 1440;

  // Set up 0" margins all around.
  fr.rc.left   = fr.rcPage.left ;//+ 1440;  // 1440 TWIPS = 1 inch.
  fr.rc.top    = fr.rcPage.top ;//+ 1440;
  fr.rc.right  = fr.rcPage.right ;//- 1440;
  fr.rc.bottom = fr.rcPage.bottom ;//- 1440;

  // Default the range of text to print as the entire document.
  fr.chrg.cpMin = 0;
  fr.chrg.cpMax = -1;
  // Set up the print job (standard printing stuff here).
  DOCINFO di;
  ZeroMemory(&di, sizeof(di));
  di.cbSize = sizeof(DOCINFO);

  di.lpszDocName = _T("eClinic Pharmacy SMS Authorisation Form");

  // Do not print to file.
  di.lpszOutput = NULL;


  // Start the document.
  StartDoc(hPrinterDC, &di);

  // Find out real size of document in characters.
  //lTextLength = GetTextLength();
  lTextLength = GetTextLengthEx(GTL_PRECISE | GTL_NUMCHARS);

  do
  {
    // Start the page.
    StartPage(hPrinterDC);

    // Print as much text as can fit on a page. The return value is
    // the index of the first character on the next page. Using TRUE
    // for the wParam parameter causes the text to be printed.

    lTextPrinted =FormatRange(&fr,true);
    DisplayBand(&fr.rc );

    // Print last page.
    EndPage(hPrinterDC);

    // If there is more text to print, adjust the range of characters
    // to start printing at the first character of the next page.
    if (lTextPrinted < lTextLength)
    {
      fr.chrg.cpMin = lTextPrinted;
      fr.chrg.cpMax = -1;
    }
  }
  while (lTextPrinted < lTextLength);

  // Tell the control to release cached information.
  FormatRange(NULL,false);


  EndDoc (hPrinterDC);

  ///////

  DeleteDC(hPrinterDC);

}

Re: Printing with CRichEditCtrl control

sdancer757-Oct-12 20:21

sdancer75

7-Oct-12 20:21

Thank you Andrew,

The offending code was the

C++

GetTextLength()

that it should be changed the way you showed me in your example with :

lTextLength = GetTextLengthEx(GTL_PRECISE | GTL_NUMCHARS);

I didn't bothered until now, with the GetTextLengthEx and I had a really hard time with this functionality. Now it works that way it should be.

MSDN reports :
GetTextLengthEx provides additional ways of determining the length of the text. It supports the Rich Edit 2.0 functionality. For more information, see About Rich Edit Controls in the Platform SDK.

My very best regards for your help,
George

sdancer75

Quality based Video encoding in H.264 Codec

Ajesh Kumar.T.T26-Sep-12 21:01

Ajesh Kumar.T.T

26-Sep-12 21:01

Hi,
I am using H.264 codec to create MP4 file from images. IMFSinkWriter is used for encoding purpose.
While encoding, I need to control the quality of the encoded video by adjusting the average bit rate parameter value. But I could not get any equation for calculating this.
I tried several equations, but the video behavior is different for different type(resolution) of images.
One of the equation used is Frame width * Frame height * frame rate * Image quality parameter * some constant.
But this is not working for all types of resolutions.
My image quality parameter will be varied from 1 to 100.(Low to High)
Could you please provide an equation to calculate the average bit rate for controlling the image quality from Frame width, Frame height and frame rate?

I tried the VBR encoding but it does not work for the encoding using Sink writer.

How to Convert palette buffer to RGB buffer

Ajesh Kumar.T.T26-Sep-12 21:00

Ajesh Kumar.T.T

26-Sep-12 21:00

I have a buffer which contains BitmapInfo + pixel data. this pixel data is in the palette format. Bitmapinfo structure contains color table. This can be solved by using LockBits method but I don't know how to use LockBits method for converting buffer to buffer. I found a lot of such conversions, but they are mainly processed one input file.

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