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LEADTOOLS Common Dialog C++ Class Library Help

SHIFTDIFFERENCEFILTERDLGPARAMS

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typedef struct _SHIFTDIFFERENCEFILTERDLGPARAMS
{
   L_UINT uStructSize;
   pBITMAPHANDLE pBitmap;
   L_BOOL bZoomToFit;
   pSPATIALFLT pFilter;
   L_UINT32 uDlgFlags;
   LTCOMMDLGHELPCB pfnHelpCallback;
   L_VOID  *pHelpCallBackUserData;
} SHIFTDIFFERENCEFILTERDLGPARAMS,  * LPSHIFTDIFFERENCEFILTERDLGPARAMS;

The SHIFTDIFFERENCEFILTERDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogImageEffect::DoModalShiftDifferenceFilter function. After the user closes the dialog box, this structure is updated with information about the user's selections.

Member

Description

uStructSize

Size of this structure, in bytes. Use the sizeof operator to calculate this value.

pBitmap

Ignored.

bZoomToFit

Flag that indicates the initial zoom level for previewing the image. Possible values are:

 

Value

Meaning

 

TRUE

Set the initial zoom level to "Zoom to fit".

 

FALSE

Set the initial zoom level to "Normal (1:1)".

 

pFilter

Address of a variable to be updated with the spatial filter selected in the dialog. The spatial filter applies shift-and-difference edge detection. All pixels not on the detected edges are changed to black. Choose the appropriate value for diagonal, horizontal, or vertical detection. Possible values are:

 

Value

 

FLT_SHIFTDIFF_DIAG

 

FLT_SHIFTDIFF_HORZ

 

FLT_SHIFTDIFF_VERT

uDlgFlags

User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:

 

Value

Meaning

 

DLG_SHIFTDIFFERENCEFILTER_SHOW_CONTEXTHELP

[0x00000002] dialog should contain a context sensitive help icon.

pfnHelpCallback

Ignored.

pHelpCallBackUserData

Ignored.

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