Displays the Free Hand Wave dialog box, and gets the options for LBitmap::FreeHandWave.


#include "ltwrappr.h"

virtual L_INT LDialogImageEffect::DoModalFreeHandWave(hWndOwner)


HWND hWndOwner

Handle of the window which owns the dialog.


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.


LDialogImageEffect::SetFreeHandWaveParams must be called before using this function to set the initial values for the dialog. You can get the updated FREEHANDWAVEDLGPARAMS with the values entered by the user through the dialog by using LDialogImageEffect::GetFreeHandWaveParams.

The Free Hand Wave dialog.

This dialog has the following fields:

Curve Mode Drop-down list box

Use this to select the curve mode to use. There are two choices:

Flip Buttons

Use these buttons to flip the curve if the Curve Mode is either Curve or Linear. The following options are available:

Reset Button

Use the Reset button to set the curve to its default values.

Load Button

Use the Load button to load an "*.lhw" file that contains Hand Wave curve settings and the angle setting, using the Load dialog. The loaded file will set new curve and angle settings.


Loading curve and angle settings will overwrite all current curve and angle settings!

Save Button

Use the Save button to save the curve and angle settings into an "*.lhw" file. This allows you set the same curve and angle settings for other images by re-loading the file.

Required DLLs and Libraries

See Also




L_INT LDialogImageEffect_DoModalFreeHandWaveExample(LBitmap * pBitmap, HWND hWnd) 
   L_INT nRet; 
   LDialogImageEffect DlgImageEffect; 
   nRet = LDialogImageEffect::Initialize(0); 
   if(nRet != SUCCESS) 
      return nRet; 
   memset ( &DlgParams, 0, sizeof ( FREEHANDWAVEDLGPARAMS ) ); 
   DlgParams.uStructSize         = sizeof ( FREEHANDWAVEDLGPARAMS ); 
   DlgParams.uScale              = 10; 
   DlgParams.uWaveLen            = 5; 
   DlgParams.uFreeHandWaveFlags  = FILL_CLR | DIS_FRQ; 
   DlgParams.nAngle              = 4500; 
   DlgParams.crFill              = RGB ( 200, 0, 0 );  
   DlgImageEffect.EnableCallBack (FALSE); 
   nRet = DlgImageEffect.SetFreeHandWaveParams(&DlgParams); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = DlgImageEffect.DoModalFreeHandWave(hWnd); 
   if(nRet < 1) 
      return nRet; 
   // Gets the updated values for the structure 
   nRet = DlgImageEffect.GetFreeHandWaveParams(&DlgParams, sizeof(DlgParams)); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = LDialogImageEffect::Free(); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
Help Version 23.0.2024.2.29
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LEADTOOLS Common Dialog C++ Class Library Help

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.