LDialogColor::DoModalHalfTone

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#include "ltwrappr.h"

virtual L_INT LDialogColor::DoModalHalfTone(hWndOwner)

HWND hWndOwner;

/* handle of the window which owns the dialog */

Displays the Halftone dialog box, and gets the options for LBitmap::HalfTone.

Parameter	Description
hWndOwner	Handle of the window which owns the dialog.

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.

Comments

LDialogColor::SetHalfToneParams must be called before using this function to set the initial values for the dialog. You can get the updated HALFTONEDLGPARAMS with the values entered by the user through the dialog by using LDialogColor::GetHalfToneParams.

Required DLLs and Libraries

LTDLGCLR
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTDIS
LTIMGUTL
LTIMGCOR

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:	LDialogBase::Initialize, LBitmap::HalfTone.
Topics:	Using Imaging Common Dialog

Example

L_INT LDialogColor_DoModalHalfToneExample(LBitmap * pBitmap, HWND hWnd)
{
   L_INT nRet;
   LDialogDocument DlgDocument;
   nRet = LDialogDocument::Initialize(0);
   if(nRet != SUCCESS)
      return nRet;
   DlgDocument.SetBitmap(pBitmap);
   BITMAPHANDLE BitmapRegion ; 
   memset ( &BitmapRegion, 0, sizeof ( BITMAPHANDLE ) ) ;
   DOTREMOVEDLGPARAMS DlgParams1; 
   memset ( &DlgParams1, 0, sizeof ( DOTREMOVEDLGPARAMS ) ) ;
   DlgParams1.uStructSize      = sizeof ( DOTREMOVEDLGPARAMS ) ;
   DlgParams1.DotRemove.uStructSize         = sizeof ( DOTREMOVE ) ;
   DlgParams1.DotRemove.pBitmapRegion = &BitmapRegion;
   DlgParams1.DotRemove.uBitmapStructSize = sizeof ( BITMAPHANDLE );
   DlgParams1.DotRemove.iMinDotWidth  = 1000 ;
   DlgParams1.DotRemove.iMinDotHeight = 1000 ;
   DlgParams1.DotRemove.iMaxDotWidth  = 1000 ;
   DlgParams1.DotRemove.iMaxDotHeight = 1000 ;
   DlgParams1.DotRemove.uFlags        = DOT_USE_DIAGONALS | DOT_USE_DPI ;
   DlgDocument.EnableCallBack (FALSE);
   DlgDocument.EnablePreview(TRUE);
   DlgDocument.EnableAutoProcess(TRUE);
   DlgDocument.EnableToolbar(TRUE);
   nRet = DlgDocument.SetDotRemoveParams(&DlgParams1) ;
   if(nRet != SUCCESS)
      return nRet;
   nRet = DlgDocument.DoModalDotRemove(hWnd);
   if(nRet < 1)
      return nRet;
   // Gets the updated values for the structure
   nRet = DlgDocument.GetDotRemoveParams(&DlgParams1, sizeof(DlgParams1)) ;
   if(nRet != SUCCESS)
      return nRet;
   nRet = LDialogDocument::Free();
   if(nRet != SUCCESS)
      return nRet;
   LDialogColor DlgColor;
   nRet = DlgColor.Initialize(DLG_INIT_COLOR );
   if(nRet != SUCCESS)
      return nRet;
   DlgColor.SetBitmap(pBitmap);
   HALFTONEDLGPARAMS DlgParams; 
   memset ( &DlgParams, 0, sizeof ( HALFTONEDLGPARAMS ) ) ;
   DlgParams.uStructSize     = sizeof ( HALFTONEDLGPARAMS );
   DlgParams.nAngle    = 5;
   DlgParams.uDim      = 5;
   DlgParams.uType     = HT_RECT ;
   DlgParams.uDlgFlags = DLG_HALFTONE_SHOW_PREVIEW | 
                         DLG_HALFTONE_SHOW_TOOL_ZOOMLEVEL;
   DlgColor.EnableCallBack (FALSE);
   DlgColor.EnablePreview(TRUE);
   DlgColor.EnableAutoProcess(TRUE);
   DlgColor.EnableToolbar(TRUE);
   nRet = DlgColor.SetHalfToneParams(&DlgParams) ;
   if(nRet != SUCCESS)
      return nRet;
   nRet = DlgColor.DoModalHalfTone(hWnd);
   if(nRet < 1)
      return nRet;
   // Gets the updated values for the structure
   nRet = DlgColor.GetHalfToneParams(&DlgParams, sizeof(DlgParams)) ;
   if(nRet != SUCCESS)
      return nRet;
   nRet = DlgColor.Free();
   if(nRet != SUCCESS)
      return nRet;
   return nRet;
}