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LDialogColor::DoModalHalfTone

Summary

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

Syntax

#include "ltwrappr.h"

virtual L_INT LDialogColor::DoModalHalfTone(hWndOwner)

Parameters

HWND hWndOwner

Handle of the window which owns the dialog.

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

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.

The Halftone dialog.

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

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; 
}