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L_DlgGrayScale

Summary

Displays the Gray Scale dialog box, and gets the options for L_GrayScaleBitmapExt.

Syntax

#include "l_bitmap.h"

L_LTDLG_API L_INT L_DlgGrayScale (hWndOwner, pDlgParams)

Parameters

L_HWND hWndOwner

Handle of the window which owns the dialog.

LPGRAYSCALEDLGPARAMS pDlgParams

Pointer to a GRAYSCALEDLGPARAMS 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.

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.

Comments

The Gray Scale dialog.

Required DLLs and Libraries

LTDLGCLR
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTDIS
LTIMGUTL
LTIMGCLR
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 ShowDlgGrayScaleExample(HWND            hWnd,pBITMAPHANDLE   pBitmap) 
{ 
   L_INT nRet; 
   GRAYSCALEDLGPARAMS DlgParams ; 
 
   memset ( &DlgParams, 0, sizeof ( GRAYSCALEDLGPARAMS ) ) ; 
 
   DlgParams.uStructSize  = sizeof ( GRAYSCALEDLGPARAMS ) ; 
   DlgParams.pBitmap      = pBitmap ; 
   DlgParams.nRedFactor   = 400 ; 
   DlgParams.nGreenFactor = 300 ; 
   DlgParams.nBlueFactor  = 300 ; 
   DlgParams.uDlgFlags    = DLG_GRAYSCALE_SHOW_PREVIEW        | 
                            DLG_GRAYSCALE_SHOW_TOOL_ZOOMLEVEL ; 
 
   nRet = L_DlgInit ( DLG_INIT_COLOR ) ; 
   if(nRet != SUCCESS && nRet != ERROR_DLG_ALREADYINITIATED) 
      return nRet; 
   nRet = L_DlgGrayScale ( hWnd, &DlgParams ) ;  
   if(nRet < 1) 
      return nRet; 
   nRet = L_DlgFree () ; 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
} ;