LAnimationWindow::PreProcessing

#include "ltwrappr.h"

L_INT LAnimationWindow::PreProcessing()

Creates an animation playback for the class object.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Required DLLs and Libraries

LTDIS
LTFIL

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.

See Also

Functions:

LAnimationWindow::PostProcessing, LAnimationWindow::PlayWhileLoad, LAnimationWindow::PlayProcessing, Class Members

Topics:

Implementing Animation

 

Raster Image Functions: Playing Animated Images

Example

The following example will create an animation, and play it continuously until the user aborts or closes the program. The program uses DoEvents to allow the user to stop animation.

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
class MyAnimationWindow : public LAnimationWindow 
{ 
public : 
   L_INT PreProcessing() 
   { 
      return LAnimationWindow::PreProcessing(); 
   } 
   L_INT PlayProcessing(HWND hWnd, L_BOOL bLoop) 
   { 
      return LAnimationWindow::PlayProcessing(hWnd, bLoop); 
   } 
   L_INT PostProcessing() 
   { 
      return LAnimationWindow::PostProcessing(); 
   } 
}; 
L_INT LAnimationWindow_PreProcessingExample(HWND hWndParent) 
{ 
   L_INT nRet; 
   LBase::LoadLibraries(LT_ALL_LEADLIB); 
   //make sure all libraries are loaded 
   MyAnimationWindow MyAnimation; 
   MyAnimation.SetFileName(MAKE_IMAGE_PATH(TEXT("eye.gif"))); 
   nRet = MyAnimation.Load(); 
   if (nRet!=SUCCESS) 
      return nRet; 
   MyAnimation.CreateWnd(hWndParent,0, WS_VISIBLE|WS_CHILD|WS_BORDER,0,0,300,300); 
   nRet = MyAnimation.PreProcessing(); 
   if (nRet!=SUCCESS) 
      return nRet; 
   nRet = MyAnimation.PlayProcessing(hWndParent, TRUE); 
   if (nRet!=SUCCESS) 
      return nRet; 
   while (MyAnimation.IsPlaying()) 
   { 
      L_BOOL bCanceled; 
      L_BOOL bQuit = MyAnimation.DoEvents(&bCanceled); 
      if (bCanceled || bQuit) 
      { 
         MyAnimation.PostProcessing(); 
         break; 
      } 
   } 
   return SUCCESS; 
}

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