L_DlgGetGradient

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_DlgGetGradient(hWndOwner, pDlgParams)

HWND hWndOwner;	/* owner of dialog */
LPGRADIENTDLGPARAMS pDlgParams;	/* pointer to a GRADIENTDLGPARAMS structure */

Displays the Get Gradient dialog box, and gets the options for L_EfxGradientFillRect.

Parameter	Description
hWndOwner	Handle of the window which owns the dialog.
pDlgParams	Pointer to a GRADIENTDLGPARAMS 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 Get Gradient dialog can be seen below:

$image\GetGradient.gif$

Required DLLs and Libraries

LTDLGEFX
LTDLGFILE
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_EfxGradientFillRect
Topics:	Dialogs: Special Effects
	Using Imaging Common Dialog

Example

L_VOID ShowDialog ( HWND hWnd, pBITMAPHANDLE pBitmap )
{
   GRADIENTDLGPARAMS DlgParams ;
   HDC               hDC ;
   RECT              rcDst ;

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

   DlgParams.uStructSize     = sizeof ( GRADIENTDLGPARAMS ) ;
   DlgParams.pBitmap   = pBitmap ;
   DlgParams.crStart   = RGB ( 0,0,255 ) ;
   DlgParams.crEnd     = RGB ( 255,0,0 ) ;
   DlgParams.uStyle    = EFX_GRADIENT_ANGLE_TO_RT ;
   DlgParams.uSteps    = 200 ;
   DlgParams.uDlgFlags = DLG_GRADIENT_SHOW_PREVIEW          |
                         DLG_GRADIENT_AUTOPREVIEW           |
                         DLG_GRADIENT_STARTCOLOR            |
                         DLG_GRADIENT_ENDCOLOR              |
                         DLG_GRADIENT_STEPS                 |
                         DLG_GRADIENT_NO_TREEVIEW           |
                         DLG_GRADIENT_CLASS_LINEAR          |
                         DLG_GRADIENT_CLASS_ANGULAR         |
                         DLG_GRADIENT_CLASS_RECTANGULAR     |
                         DLG_GRADIENT_CLASS_ELLIPTICAL      |
                         DLG_GRADIENT_CLASS_CONICAL ;

   L_DlgInit ( DLG_INIT_COLOR ) ;

   if ( SUCCESS_DLG_OK == L_DlgGetGradient ( hWnd, &DlgParams ) )
   {
      hDC = GetDC ( hWnd ) ;

      GetClientRect ( hWnd, &rcDst ) ;

      L_EfxGradientFillRect( hDC,
                              &rcDst,
                              DlgParams.uStyle,
                              DlgParams.crStart,
                              DlgParams.crEnd,
                              DlgParams.uSteps ) ;

      ReleaseDC ( hWnd, hDC ) ;
   }

   L_DlgFree ( ) ;
}