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LEADTOOLS Common Dialog C++ Class Library Help

LINESEGMENTFILTERDLGPARAMS

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typedef struct _LINESEGMENTFILTERDLGPARAMS
{
   L_UINT uStructSize;
   pBITMAPHANDLE pBitmap;
   L_BOOL bZoomToFit;
   pSPATIALFLT pFilter;
   L_UINT32 uDlgFlags;
   LTCOMMDLGHELPCB pfnHelpCallback;
   L_VOID  *pHelpCallBackUserData;
} LINESEGMENTFILTERDLGPARAMS,  * LPLINESEGMENTFILTERDLGPARAMS;

The LINESEGMENTFILTERDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogImageEffect::DoModalLineSegmentFilter 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 Line Segment filter applies line segment line detection. You can use this filter to find line discontinuities in an image. All pixels not on the detected line segments are changed to black. Choose the appropriate value for horizontal, vertical, left-to-right diagonal, or right-to-left diagonal detection. Possible values are:

 

Value

 

FLT_LINESEG_HORZ

 

FLT_LINESEG_VERT

 

FLT_LINESEG_LTOR

 

FLT_LINESEG_RTOL

uDlgFlags

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

 

Value

Meaning

 

DLG_LINESEGMENTFILTER_SHOW_CONTEXTHELP

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

pfnHelpCallback

Ignored.

pHelpCallBackUserData

Ignored.

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