LPaintEffect::DrawGradient

#include "ltwrappr.h"

virtual L_INT LPaintEffect::DrawGradient(pRect, uStyle)

LPRECT pRect;	/* the bounding rectangle */
L_UINT uStyle;	/* the gradient style */

Draws a rectangle into the target device context, and then fills the rectangle with a gradient.

Parameter	Description
pRect	The bounding rectangle.
uStyle	The gradient style. For possible values, refer to Effect Gradient Styles.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

Use LPaintEffect::SetGradientParameters to control the properties of the gradient.

Required DLLs and Libraries

LTDIS
LTEFX

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:	Class Members
Topics:	Implementing Special Effects

Example

L_INT LPaintEffect__DrawGradientExample(LBitmapBase& LeadBitmap,HDC hDC)
{
   L_INT nRet;
   LPaintEffect LeadPaintEffect ;
   GRADIENTDLGPARAMS GradDlgParm;
   RECT Rect ;
   LeadPaintEffect.SetBitmap(&LeadBitmap) ;
   LeadPaintEffect.SetDC(hDC) ;
   LeadPaintEffect.GetGradientParameters(&GradDlgParm) ;
   GradDlgParm.uSteps = 3 ;
   nRet = LeadPaintEffect.SetGradientParameters(&GradDlgParm) ;
   if(nRet != SUCCESS)
      return nRet;
   Rect.left = 0 ;
   Rect.top = 0 ;
   Rect.right = LeadBitmap.GetWidth() ;
   Rect.bottom = LeadBitmap.GetHeight() ;
   nRet = LeadPaintEffect.DrawGradient(&Rect,EFX_GRADIENT_CONE_FROM_RB) ;
   if(nRet != SUCCESS)
      return nRet;
   LeadPaintEffect.SetDC(0);
   return SUCCESS;
}