LPaintEffect::PaintTransition

#include "ltwrappr.h"

virtual L_INT LPaintEffect::PaintTransition(pRect, uTransition, uEffect=EFX_EFFECT_WIPE_L_TO_R, nSpeed = 0, nCycles = 0, uPass=1, uMaxPass=1, uROP=SRCCOPY)

LPRECT pRect;	the bounding rectangle
L_UINT uTransition;	the filling style
L_UINT uEffect;	the effect to apply when painting
L_INT nSpeed;	speed of the wave
L_INT nCycles;	number of cycles or repetitions
L_UINT uPass;	pass number when using a pattern brush
L_UINT uMaxPass;	maximum passes for a pattern brush
L_UINT32 uROP;	windows ROP code for display

Draws a rectangle into the associated device context with the specified fill pattern while using a special effect.

Parameter	Description
pRect	The bounding rectangle.
uTransition	Filling style used during transition. For valid values, refer to Effect Transition Filling Styles.
uEffect	Effect to apply when painting. For valid values, refer to Effect Types.
nSpeed	Speed of the wave. Valid values are 1 to 256. This parameter is valid only if the uEffect parameter is from the Wave class.
nCycles	Number of cycles or repetitions used to draw the wave. This parameter is valid only if the uEffect parameter is from the Wave class.
uPass	Pass number when using a pattern brush. Use 1 for painting in one pass.
uMaxPass	Maximum passes for a pattern brush. Use 1 for painting in one pass.
uROP	Windows ROP code for display. This parameter takes the same codes as the Windows BitBlt function. For ordinary painting, use SRCCOPY.

Returns

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

Comments

Use this function to create a special effect screen transition before painting the next image.

Use LPaintEffect::SetTransitionParameters to control the properties of the transition.

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.

Platforms

Win32, x64.

Example

L_INT LPaintEffect__PaintTransitionExample(LBitmapBase& LeadBitmap,HDC hDC) 
{ 
   L_INT nRet; 
   LPaintEffect LeadPaintEffect; 
   TRANSITIONDLGPARAMS TransDlgParm; 
   RECT Rect; 
   LeadPaintEffect.SetBitmap(&LeadBitmap) ; 
   LeadPaintEffect.SetDC(hDC) ; 
   LeadPaintEffect.GetTransitionParameters(&TransDlgParm) ; 
   TransDlgParm.uGrain = 5; 
   TransDlgParm.uDelay = 10; 
   TransDlgParm.bTransparent = TRUE; 
   TransDlgParm.crTransparent = RGB(10,0,255); 
   nRet = LeadPaintEffect.SetTransitionParameters(&TransDlgParm) ; 
   if(nRet != SUCCESS) 
      return nRet; 
   Rect.left = 50 ; 
   Rect.top = 50 ; 
   Rect.right = 200 ; 
   Rect.bottom = 200 ; 
   nRet = LeadPaintEffect.PaintTransition(&Rect,EFX_TRANS_GRADIENT_LINE_T_TO_B, 
   EFX_EFFECT_WIPE_RECTANGLE_IN, 0,0, 1,3); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = LeadPaintEffect.PaintTransition(&Rect,EFX_TRANS_GRADIENT_LINE_T_TO_B, 
   EFX_EFFECT_WIPE_RECTANGLE_OUT, 0,0,2,3); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = LeadPaintEffect.PaintTransition(&Rect,EFX_TRANS_GRADIENT_LINE_T_TO_B, 
   EFX_EFFECT_WIPE_RECTANGLE_IN, 0,0,3,3); 
   if(nRet != SUCCESS) 
      return nRet; 
   LeadPaintEffect.SetDC(0) ; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C++ Class Library Help

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Summary of Features

Functions:	Class Members
Topics:	Implementing Special Effects
	Effect Types