LEADTOOLS Raster imaging C++ Class library help
| LEADTOOLS Raster Imaging C++ Class Library Help > Classes and Member Functions > LFile > LFile Member Functions > LFile::BrowseDirCallBack |
#include "ltwrappr.h"
virtual L_INT LFile::BrowseDirCallBack(pLBitmap, pszFilename, pFileInfo, nStatus, nPercent)
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LBitmapBase *pLBitmap; |
/* pointer to an LBitmapBase object */ |
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L_TCHAR * pszFilename; |
/* pointer to the filename */ |
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pFILEINFO pFileInfo; |
/* pointer to the file info structure */ |
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L_INT nStatus; |
/* status code */ |
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L_INT nPercent; |
/* percentage completion of a file load */ |
Handles the thumbnails generated by calling the LFile::BrowseDir function.
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Parameter |
Description |
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pLBitmap |
The pointer to the LBitmapBase object that references the thumbnail generated by LFile::BrowseDir. You can copy this bitmap, save it to file, insert it into a LEADTOOLS ImageList Control, or otherwise process it as needed in your application. |
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pszFilename |
Character string containing the filename from which this thumbnail was generated. |
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pFileInfo |
Pointer to a FILEINFO structure containing information about pszFilename. |
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nStatus |
Status code. If an error occurred during thumbnail generation, this will be < SUCCESS. Possible values are: |
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Value |
Meaning |
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BROWSE_LOADING |
[2] Indicates image is being loaded, see nPercent. |
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BROWSE_SKIPPED |
[3] Indicates image was skipped because it was larger than the specified range in LFile::BrowseDir. |
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BROWSE_PRELOAD |
[4] Indicates that LEADTOOLS has found a file and is about to determine the file format. It will then attempt to create a thumbnail for it. If the user wishes to avoid the internal file information processing, return ERROR_FILE_FORMAT. This will cause LEADTOOLS to skip the file. |
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nPercent |
Represents the percentage completion of a file load when nErrorCode is equal to BROWSE_LOADING. |
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Returns
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> 0 |
The function was successful, and returns the handle to the ImageList Control window. |
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< 0 |
An error occurred. Return Codes |
Comments
You must return SUCCESS to continue browsing for supported image files. The value you return from this callback will also be returned from LFile::BrowseDir.
Required DLLs and Libraries
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LTFIL For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64.
See Also
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Functions: |
LFile::BrowseDir, LFile::Load, LFile::ReadStamp, LFileSettings::SetLoadResolution, LFileSettings::SetPCDResolution, LFileSettings::SetWMFResolution, LFileSettings::SetWMFResolution |
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Topics: |
Example
For an example, refer to LFile::BrowseDir.
