LDialogImageEffect::DoModalGradientFilter

#include "ltwrappr.h"

virtual L_INT LDialogImageEffect::DoModalGradientFilter(hWndOwner)

HWND hWndOwner;

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

Displays the Gradient Filter dialog box, and gets the options for LBitmap::SpatialFilter .

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

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

The GradientFilter dialog.

Required DLLs and Libraries

LTDLGIMGEFX
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTDIS
LTIMGUTL
LTIMGEFX

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::SpatialFilter , LDialogImageEffect::DoModalLaplacianFilter, LDialogImageEffect::DoModalSobelFilter, LDialogImageEffect::DoModalPrewittFilter, LDialogImageEffect::DoModalLineSegmentFilter, LBase::EnableCallBack , LDialogBase::EnablePreview, LDialogBase::EnableAutoProcess, LDialogBase::EnableToolbar, LDialogBase::Free, LDialogImageEffect::SetGradientFilterParams, LDialogImageEffect::GetGradientFilterParams

Topics:

Using Imaging Common Dialog

Example

L_INT LDialogImageEffect_DoModalGradientFilterExample(LBitmap * pBitmap, HWND hWnd)
{
   L_INT nRet;
   LDialogImageEffect DlgImageEffect;
   nRet = LDialogImageEffect::Initialize(0);
   if(nRet != SUCCESS)
      return nRet;
   DlgImageEffect.SetBitmap(pBitmap);
   GRADIENTFILTERDLGPARAMS DlgParams; 
   memset ( &DlgParams, 0, sizeof ( GRADIENTFILTERDLGPARAMS ) );
   DlgParams.uStructSize      = sizeof ( GRADIENTFILTERDLGPARAMS );
   DlgParams.pFilter    = FLT_GRADIENT_NE;
   DlgImageEffect.EnableCallBack (FALSE);
   DlgImageEffect.EnablePreview(TRUE);
   DlgImageEffect.EnableAutoProcess(TRUE);
   DlgImageEffect.EnableToolbar(TRUE);
   nRet = DlgImageEffect.SetGradientFilterParams(&DlgParams);
   if(nRet != SUCCESS)
      return nRet;
   nRet = DlgImageEffect.DoModalGradientFilter(hWnd);
   if(nRet < 1)
      return nRet;
   // Gets the updated values for the structure
   nRet = DlgImageEffect.GetGradientFilterParams(&DlgParams, sizeof(DlgParams));
   if(nRet != SUCCESS)
      return nRet;
   nRet = LDialogImageEffect::Free();
   if(nRet != SUCCESS)
      return nRet;
   return SUCCESS;
}