LDialogImageEffect::DoModalSobelFilter

#include "ltwrappr.h"

virtual L_INT LDialogImageEffect::DoModalSobelFilter(hWndOwner)

HWND hWndOwner;

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

Displays the Sobel 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::SetSobelFilterParams must be called before using this function to set the initial values for the dialog. You can get the updated SOBELFILTERDLGPARAMS with the values entered by the user through the dialog by using LDialogImageEffect::GetSobelFilterParams.

The Sobel Filter dialog is shown in the following figure:

$image\SobelFilter.gif$

Required DLLs and Libraries

LTDLGIMGEFX
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTDIS
LTIMG

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::DoModalGradientFilter, LDialogImageEffect::DoModalPrewittFilter, LDialogImageEffect::DoModalLineSegmentFilter, LBase::EnableCallBack, LDialogBase::EnablePreview, LDialogBase::EnableAutoProcess, LDialogBase::EnableToolbar, LDialogBase::Free, LDialogImageEffect::SetSobelFilterParams, LDialogImageEffect::GetSobelFilterParams

Topics:

Using Imaging Common Dialog

Example

void TestFunction(LBitmap * pBitmap, HWND hWnd)
{
   LDialogImageEffect DlgImageEffect;
   LDialogImageEffect::Initialize(0);
   DlgImageEffect.SetBitmap(pBitmap);

   SOBELFILTERDLGPARAMS DlgParams;

   memset ( &DlgParams, 0, sizeof ( SOBELFILTERDLGPARAMS ) );

   DlgParams.uStructSize      = sizeof ( SOBELFILTERDLGPARAMS );
   DlgParams.pFilter    = FLT_SOBEL_HORZ;
   DlgImageEffect.EnableCallBack(FALSE);
   DlgImageEffect.EnablePreview(TRUE);
   DlgImageEffect.EnableAutoProcess(TRUE);
   DlgImageEffect.EnableToolbar(TRUE);
   DlgImageEffect.SetSobelFilterParams(&DlgParams);
   DlgImageEffect.DoModalSobelFilter(hWnd);

   // Gets the updated values for the structure
   DlgImageEffect.GetSobelFilterParams(&DlgParams, sizeof(DlgParams));
   LDialogImageEffect::Free();
}