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L_DlgGetGradient

Summary

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

Syntax

#include "l_bitmap.h"

L_LTDLG_API L_INT L_DlgGetGradient(hWndOwner, pDlgParams)

Parameters

L_HWND hWndOwner

Handle of the window which owns the dialog.

LPGRADIENTDLGPARAMS 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 dialogs initial values.

Returns

Value	Meaning
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.

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

Example

L_INT ShowDlgGetGradientExample(HWND           hWnd,pBITMAPHANDLE  pBitmap) 
{ 
   L_INT nRet; 
   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         ; 
 
   nRet = L_DlgInit ( DLG_INIT_COLOR ) ; 
   if(nRet != SUCCESS && nRet != ERROR_DLG_ALREADYINITIATED) 
      return nRet; 
 
   nRet = L_DlgGetGradient ( hWnd, &DlgParams ); 
   if ( SUCCESS_DLG_OK == nRet ) 
   { 
      hDC = GetDC ( hWnd ) ; 
 
      GetClientRect ( hWnd, &rcDst ) ; 
 
      nRet = L_EfxGradientFillRect(hDC, 
                            &rcDst, 
                            DlgParams.uStyle, 
                            DlgParams.crStart, 
                            DlgParams.crEnd, 
                            DlgParams.uSteps ) ; 
      if(nRet != SUCCESS) 
         return nRet; 
 
      ReleaseDC ( hWnd, hDC ) ; 
   } 
 
   nRet = L_DlgFree(); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}