virtual L_INT LFile::BrowseDirCallBack(pLBitmap, pszFilename, pFileInfo, nStatus, nPercent)
Handles the thumbnails generated by calling the LFile::BrowseDir function.
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.
Character string containing the filename from which this thumbnail was generated.
Pointer to a FILEINFO structure containing information about pszFilename.
Status code. If an error occurred during thumbnail generation, this will be < SUCCESS. Possible values are:
Value | Meaning |
---|---|
BROWSE_LOADING | [2] Indicates image is being loaded, see nPercent. |
BROWSE_SKIPPED | [3] Indicates image was skipped because it was larger than the specified range in LFile::BrowseDir. |
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. |
Represents the percentage completion of a file load when nErrorCode is equal to BROWSE_LOADING.
Value | Meaning |
---|---|
> 0 | The function was successful, and returns the handle to the ImageList Control window. |
< 0 | An error occurred. Return Codes |
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.
Win32, x64.
For an example, refer to LFile::BrowseDir.
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