L_DlgCanvasResize

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_DlgCanvasResize(hWndOwner, pDlgParams)

HWND hWndOwner;	/* owner of dialog */
LPCANVASRESIZEDLGPARAMS pDlgParams;	/* pointer to a CANVASRESIZEDLGPARAMS structure */

Displays the Canvas Resize dialog box.

Parameter	Description
hWndOwner	Handle of the window which owns the dialog.
pDlgParams	Pointer to a CANVASRESIZEDLGPARAMS structure to be updated with the values entered by the user, through the dialog. Set members of this structure, before calling this function, to set the dialog’s initial values.

Returns

SUCCESS_DLG_OK	The "OK" button was pressed, and the dialog exited successfully.
SUCCESS_DLG_CANCEL	The "Cancel" button was pressed, and the dialog exited successfully.
< 1	An error occurred. Refer to Return Codes.

Comments

The Canvas Resize dialog can be seen below:

$image\CanvasResize.gif$

Required DLLs and Libraries

LTDLGIMG
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTDIS
LTIMG
LTKRN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

See Also

Functions:	L_DlgInit, L_CreateBitmap, L_CombineBitmap, L_CopyBitmap
Topics:	Dialogs: Geometric Transformations
	Using Imaging Common Dialog

Example

void ShowDialog ( HWND hWnd, pBITMAPHANDLE pBitmap )
{
   CANVASRESIZEDLGPARAMS DlgParams ;
   L_INT                 nRet ;

   memset ( &DlgParams, 0, sizeof ( CANVASRESIZEDLGPARAMS ) ) ;

   DlgParams.uStructSize          = sizeof ( CANVASRESIZEDLGPARAMS ) ;
   DlgParams.pBitmap        = pBitmap ;
   DlgParams.uDlgFlags      = DLG_CANVASRESIZE_SHOW_CURRENT_HEIGHT |
                              DLG_CANVASRESIZE_SHOW_CURRENT_WIDTH  |
                              DLG_CANVASRESIZE_SHOW_HORIZPOS       |
                              DLG_CANVASRESIZE_SHOW_VERTZPOS       |
                              DLG_CANVASRESIZE_SHOW_BACKCOLOR      |
                              DLG_CANVASRESIZE_SHOW_KEEPASPECT ;

   DlgParams.nCurrentWidth  = BITMAPWIDTH  ( pBitmap ) ;
   DlgParams.nCurrentHeight = BITMAPHEIGHT ( pBitmap ) ;
   DlgParams.crBkgnd        = RGB ( 255, 255, 255 ) ;

   L_DlgInit ( DLG_INIT_COLOR ) ;

   nRet = L_DlgCanvasResize ( hWnd, &DlgParams ) ;

   L_DlgFree ( ) ;

   if ( SUCCESS_DLG_OK == nRet )
   {
      BITMAPHANDLE BitmapTemp ;

      L_CreateBitmap( &BitmapTemp,
                       sizeof(BITMAPHANDLE),
                       TYPE_CONV,
                       DlgParams.nNewWidth,
                       DlgParams.nNewHeight,
                       pBitmap->BitsPerPixel,
                       pBitmap->Order,
                       NULL,
                       pBitmap->ViewPerspective,
                       NULL,
                       0 ) ;

      L_CombineBitmap( &BitmapTemp,
                        DlgParams.ptTopLeft.x,
                        DlgParams.ptTopLeft.y,
                        BITMAPWIDTH ( pBitmap ),
                        BITMAPHEIGHT ( pBitmap ),
                        pBitmap,
                        0,
                        0,
                        CB_OP_AND | CB_DST_1 ) ;

      L_CopyBitmap( pBitmap, &BitmapTemp, sizeof(BITMAPHANDLE)) ;

       L_FreeBitmap( &BitmapTemp ) ;
   }
}