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L_DlgOpen

Summary

Displays the Open dialog box, and gets the options for L_LoadFile.

Syntax

#include "l_bitmap.h"

L_LTDLG_API L_INT L_DlgOpen(hWndOwner, pOpenFileName, pDlgParams)

Parameters

L_HWND hWndOwner

Handle of the window, which owns the dialog.

LPOPENFILENAMEW pOpenFileName

Windows structure. This structure is documented in the Microsoft Windows SDK documentation.

For this function, you must set the following members of the OPENFILENAMEW structure:

lStructSize 
lpstrFilter 
nFilterIndex 
lpstrFile 
nMaxFile 
lpstrFileTitle 
nMaxFileTitle 
lpstrInitialDir 
lpstrTitle 
lpstrDefExt 
Flags

LEADTOOLS specifically sets the following flags:

OFN_HIDEREADONLY
OFN_ENABLEHOOK
OFN_ENABLETEMPLATE
OFN_ALLOWMULTISELECT is not set by LEADTOOLS automatically, but is allowed.
OFN_SHOWHELP is set only if you specify a HELP callback (that is pfnCallback was not NULL).

Pointer to an OPENDLGPARAMS structure to be updated with the values entered by the user through the dialog. Set members of this structure, before calling this function, to set the dialogs initial values.

Comments

The Open dialog.

✎ NOTE

In the Files of type, the file types listed below are only supported in 32-bit platforms:

Canon RAW Format (*.crw)

DJVU (*.djv)

Kodak Digital Camera KDC (*.kdc)

Kodak Photo CD (*.pcd)

Profession Digital Camera (*.dcr)

Returns

Value	Meaning
SUCCESS_DLG_OK	The "OK" button was pressed, and the dialog exited successfully.
SUCCESS_DLG_CANCEL	The "Cancel" button was pressed, and the dialog exited successfully.
< 1	An error occurred. Refer to Return Codes.

Required DLLs and Libraries

LTDLGFILE
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTFIL
LTDIS
LTIMG
LTKRN
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

Example

L_INT EXT_CALLBACK FileLoadCallback(LPOPENDLGFILEDATA lpFileData, 
                                    L_INT             nTotalPercent, 
                                    L_INT             nFilePercent, 
                                    L_VOID*           lpUserData) 
{ 
   UNREFERENCED_PARAMETER(lpUserData); 
   if ( nFilePercent == 100 ) 
   { 
      MessageBox ( NULL, lpFileData->szFileName, TEXT("File Loaded"), MB_OK ) ; 
   } 
 
   if ( nTotalPercent == 100 ) 
   { 
      MessageBox ( NULL, TEXT("File(s) Loading Completed"), TEXT("File(s) Loaded"), MB_OK ) ; 
   } 
 
   return SUCCESS ; 
} 
 
L_INT DlgOpenExample(HWND hWnd) 
{ 
   OPENFILENAME  OpenFileName; 
   OPENDLGPARAMS DlgParams ; 
   L_INT         nRet ; 
 
   memset ( &OpenFileName, 0, sizeof ( OPENFILENAME ) ) ; 
   memset ( &DlgParams, 0, sizeof ( OPENDLGPARAMS ) ) ; 
 
   OpenFileName.lStructSize       = sizeof(OPENFILENAME); 
   OpenFileName.lpstrInitialDir   = NULL; 
   OpenFileName.Flags             = OFN_EXPLORER         | 
                                    OFN_ALLOWMULTISELECT ; 
 
   DlgParams.uStructSize = sizeof ( OPENDLGPARAMS ) ; 
   DlgParams.pfnFileLoadCallback = FileLoadCallback ; 
 
   DlgParams.uDlgFlags = DLG_OPEN_SHOW_PROGRESSIVE     | 
                         DLG_OPEN_SHOW_MULTIPAGE       | 
                         DLG_OPEN_SHOW_LOADROTATED     | 
                         DLG_OPEN_SHOW_LOADCOMPRESSED  | 
                         DLG_OPEN_SHOW_FILEINFO        | 
                         DLG_OPEN_SHOW_PREVIEW         | 
                         DLG_OPEN_SHOW_DELPAGE         | 
                         DLG_OPEN_SHOW_LOADOPTIONS     | 
                         DLG_OPEN_VIEWTOTALPAGES       | 
                         DLG_OPEN_LOADBITMAP           | 
                         DLG_OPEN_GENERATETHUMBNAIL    ; 
 
   nRet = L_DlgInit ( DLG_INIT_COLOR ) ; 
   if(nRet != SUCCESS && nRet != ERROR_DLG_ALREADYINITIATED) 
      return nRet; 
 
   nRet = L_DlgOpen ( hWnd, &OpenFileName, &DlgParams ); 
 
   if ( SUCCESS_DLG_OK == nRet ) 
   { 
      int i = 0 ; 
 
      // After using the return data you should free allocated data 
      for ( i = 0 ; i < DlgParams.nNumOfFiles ; i++ ) 
      { 
         if ( NULL != DlgParams.pFileData [ i ].pBitmap ) 
         { 
            if ( DlgParams.pFileData [ i ].pBitmap->Flags.Allocated ) 
            { 
               L_FreeBitmap( DlgParams.pFileData [ i ].pBitmap ) ; 
            } 
 
            GlobalFree ( DlgParams.pFileData [ i ].pBitmap ) ; 
         } 
 
         if ( NULL != DlgParams.pFileData [ i ].pThumbnail ) 
         { 
            if ( DlgParams.pFileData [ i ].pThumbnail->Flags.Allocated ) 
            { 
               L_FreeBitmap( DlgParams.pFileData [ i ].pThumbnail ) ; 
            } 
 
            GlobalFree ( DlgParams.pFileData [ i ].pThumbnail ) ; 
         } 
 
         if ( NULL != DlgParams.pFileData [ i ].pFileInfo ) 
         { 
            GlobalFree ( DlgParams.pFileData [ i ].pFileInfo ) ; 
         } 
 
         if ( NULL != DlgParams.pFileData [ i ].FileOptions.pOptions ) 
         { 
            GlobalFree ( DlgParams.pFileData [ i ].FileOptions.pOptions ) ; 
         } 
      } 
 
      if ( NULL != DlgParams.pFileData ) 
      { 
         GlobalFree ( DlgParams.pFileData ) ; 
      } 
   } 
   else 
      return nRet; 
 
   nRet = L_DlgFree(); 
   return nRet; 
}