Draws a rectangle into the target device context, and then fills the rectangle with a gradient.
#include "ltwrappr.h"
virtual L_INT LPaintEffect::DrawGradient(pRect, uStyle)
The bounding rectangle.
The gradient style. For possible values, refer to Effect Gradient Styles.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Use LPaintEffect::SetGradientParameters to control the properties of the gradient.
Win32, x64.
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;
}
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