LDialogColor::DoModalHalfTone

#include "ltwrappr.h"

virtual L_INT LDialogColor::DoModalHalfTone(hWndOwner)

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

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

See Also

Functions

Topics

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; 
} 
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