Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#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 For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64.
See Also
Functions: |
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Topics: |
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; }