GRADIENTFILTERDLGPARAMS

Summary

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

Syntax

typedef struct _GRADIENTFILTERDLGPARAMS 
{ 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_BOOL bZoomToFit; 
   pSPATIALFLT pFilter; 
   L_UINT32 uDlgFlags; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID  *pHelpCallBackUserData; 
} GRADIENTFILTERDLGPARAMS,  * LPGRADIENTFILTERDLGPARAMS; 

Members

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:

pFilter

Address of a variable to be updated with the spatial filter selected in the dialog. Gradient filters detect edges. All pixels not on the detected edges are changed to black. Choose the appropriate value for the direction of the effect. Possible values are:

• FLT_GRADIENT_N
• FLT_GRADIENT_NE
• FLT_GRADIENT_E
• FLT_GRADIENT_SE
• FLT_GRADIENT_S
• FLT_GRADIENT_SW
• FLT_GRADIENT_W
• FLT_GRADIENT_NW

uDlgFlags

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

pfnHelpCallback

Ignored.

pHelpCallBackUserData

Ignored.

Usage

• LDialogImageEffect::GetGradientFilterParams
• LDialogImageEffect::SetGradientFilterParams