UNDERLAYDLGPARAMS

Summary

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

Syntax

typedef struct _UNDERLAYDLGPARAMS 
{ 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_BOOL bZoomToFit; 
   L_UINT32 uUnderlayFlags; 
   L_INT nUnderlayBitmapIndex; 
   LPDLGBITMAPLIST pBitmapList; 
   L_UINT32 uDlgFlags; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID  *pHelpCallBackUserData; 
} UNDERLAYDLGPARAMS,  * LPUNDERLAYDLGPARAMS; 

Members

uStructSize

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

pBitmap

Pointer to the bitmap handle that references the bitmap used for preview or processing.

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)".

uUnderlayFlags

Flags that indicate how the underlying image is to be positioned. Possible values are:

Value Meaning
UB_TILE [0x00] Tile the underlay image. This repeats the underlying image, so that it fills the target image.
UB_STRETCH [0x01] Stretch the underlay image to fit the dimensions of the target image.

nUnderlayBitmapIndex

Index of the selected tile bitmap to use for underlay. This index points to an entry in pBitmapList member.

pBitmapList

Pointer to a DLGBITMAPLIST structure that references the images in the image picker. Set this to initialize the image picker in the dialog.

uDlgFlags

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

Value Meaning
DLG_UNDERLAY_AUTOPROCESS [0x0001] process the image on OK. The pBitmap member of this structure should contain a valid bitmap.
DLG_UNDERLAY_SHOW_CONTEXTHELP [0x0002] dialog should contain a context sensitive help icon.
DLG_UNDERLAY_SHOW_PREVIEW [0x0004] show a preview of the image in the dialog. The pBitmap member of this structure should contain a valid bitmap.
DLG_UNDERLAY_SHOW_TOOL_ZOOMLEVEL [0x0008] show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_UNDERLAY_SHOW_PREVIEW flag must be set in order to show these buttons.

pfnHelpCallback

Ignored.

pHelpCallBackUserData

Ignored.

Usage

Help Version 23.0.2024.2.29
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LEADTOOLS Common Dialog C++ Class Library Help

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.