ShowSobelFilterDlg method (LEADDlgImgEffect Control)

C++ Builder example

Delphi 4.0 example

 

Builder Syntax

int ShowSobelFilterDlg(TWinControl* AOwnerCtrl);

Delphi Syntax

Function ShowSobelFilterDlg (AOwnerCtrl: TWinControl ): L_INT;

Overview

Refer to Using Imaging Common Dialogs.

Remarks

Displays the Sobel Filter dialog box, and gets the options for the SpatialFilter method.

The layout and action of the dialog depends on the flags set in the DlgFlags property. Possible options are:

Value

Meaning

DLG_SOBELFILTER_AUTOPROCESS

[$00000001] Process the image on OK. The LEADImage property must be assigned a Main Control containing a valid bitmap before calling this method.

DLG_SOBELFILTER_SHOW_CONTEXTHELP

[$00000002] Dialog should contain a context sensitive help icon.

DLG_SOBELFILTER_SHOW_PREVIEW

[$00000004] Show a preview of the image in the dialog. The LEADImage property must be assigned a Main Control containing a valid bitmap before calling this method.

DLG_SOBELFILTER_SHOW_TOOL_ZOOMLEVEL

[$00000008] Show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_SOBELFILTER_SHOW_PREVIEW flag must be set in order to show these buttons.

If you include DLG_SOBELFILTER_AUTOPROCESS or DLG_SOBELFILTER_SHOW_PREVIEW in the DlgFlags property, the LEADImage property must be assigned a Main Control containing a valid bitmap before calling this method.

The property associated with this dialog box is:

SpatialFilterType property

To include a Help button in the dialog, set the ShowHelpButton property to TRUE.

The Sobel Filter dialog can be seen below:

image\SobelFilter.gif

See Also

Elements:

SpatialFilter method, SpatialFilterType property, ShowHelpButton property, ZoomToFit Property, DlgFlags property, EnableMethodErrors property, LEADImage property

Topics:

Imaging Common Dialogs: Properties, Methods, and Events