L_DlgOpen

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_DlgOpen(hWndOwner, pOpenFileName, pDlgParams)

HWND hWndOwner;	/* owner of dialog */
LPOPENFILENAME pOpenFileName;	/* pointer to a Windows OPENFILENAME structure */
LPOPENDLGPARAMS pDlgParams;	/* pointer to a structure */

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

Parameter	Description
hWndOwner	Handle of the window, which owns the dialog.
pOpenFileName	Windows structure. This structure is documented in the Microsoft Windows SDK documentation. For this function, you must set the following members of the OPENFILENAME 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).
pDlgParams	Pointer to a 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 dialog’s initial values.

Comments

The Open dialog can be seen below:

$image\Open.gif$

Returns

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

See Also

Functions:	L_DlgInit, L_LoadFile, L_LoadBitmap
Topics:	Dialogs: Maintenance and General Use
	Using Imaging Common Dialog

Example

L_INT L_EXPORT FileLoadCallback
(
   LPOPENDLGFILEDATA lpFileData,
   L_INT             nTotalPercent,
   L_INT             nFilePercent,
   L_VOID L_FAR*     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_VOID ShowDialog ( HWND hWnd )
{
   OPENFILENAME  OpenFileName;
   OPENDLGPARAMS DlgParams ;
   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_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 ) ;
      }
   }
}