LAnimationWindow::IsPreviousFrameAvailable

#include "ltwrappr.h"

L_BOOL LAnimationWindow::IsPreviousFrameAvailable() const

Determines whether there is an existing frame prior to the current frame.

Returns

Value Meaning
TRUE There is a frame prior to the current frame, so you can use LAnimationWindow::MovePreviousFrame.
FALSE There is not a frame prior to the current frame, so you cannot use LAnimationWindow::MovePreviousFrame.

Comments

You cannot call this function during animation playback.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Example

The following example behaves oppositely to PlayAnimation using IsPreviousFrameAvailable

L_INT LAnimationWindow_IsPreviousFrameAvailableExample(HWND hWndParent) 
 
{ 
   L_INT nRet; 
 
   LBase::LoadLibraries(LT_ALL_LEADLIB);  
 //make sure all libraries are loaded 
 
   LAnimationWindow MyAnimation; 
 
   MyAnimation.SetFileName(MAKE_IMAGE_PATH(TEXT("eye.gif"))); 
 
   nRet = MyAnimation.Load(); 
   if (nRet==SUCCESS) 
 
   { 
      nRet = MyAnimation.MoveLastFrame(); 
      if(nRet != SUCCESS) 
         return nRet; 
      MyAnimation.CreateWnd(hWndParent,0, WS_VISIBLE|WS_CHILD|WS_BORDER,0,0,300,300);  
       
      while (MyAnimation.IsPreviousFrameAvailable()) 
 
      { 
 
         Sleep(500); 
 
         MyAnimation.MovePreviousFrame(); 
 
      } 
 
   } 
   else 
      return nRet; 
 
 
   return SUCCESS; 
} 

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