LAnimationWindow::MovePreviousFrame

#include "ltwrappr.h"

virtual L_INT LAnimationWindow::MovePreviousFrame()

Moves to the previous frame in the animation object, if one exists.

Returns

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

Comments

You can use this function, if the animation in not currently playing, to move to the previous item in the bitmap list.

The previous bitmap becomes the active bitmap and is displayed.

If animation events are enabled, this function triggers the EVENT_MOVE_PREV event.

Required DLLs and Libraries

LTDIS
LTDLG
LTEFX
LTFIL
LTIMG
LTISI
LTSCR
LTTWN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:

LAnimationWindow::LAnimationWindow, LAnimationWindow::IsPreviousFrameAvailable, LAnimationWindow::IsPlaying, LAnimationWindow::MoveFirstFrame, LAnimationWindow::MoveNextFrame, LAnimationWindow::MoveLastFrame, LAnimationWindow::MoveToFrame, LAnimationWindow::AnimateEvent , Class Members

Example

L_INT LAnimationWindow_MovePreviousFrameExample(HWND hWndParent)
{
   L_INT nRet;
   LBase::LoadLibraries(LT_ALL_LEADLIB); 
 //make sure all libraries are loaded
   LAnimationWindow MyAnimation;
   WRPUNLOCKSUPPORT();
   MyAnimation.SetFileName(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\eye.gif"));
   nRet = MyAnimation.Load();
   if (nRet==SUCCESS)
   {
      MyAnimation.CreateWnd(hWndParent,0, WS_VISIBLE|WS_CHILD|WS_BORDER,0,0,300,300);
      nRet = MyAnimation.MoveLastFrame();
      if(nRet != SUCCESS)
         return nRet;
      if (MyAnimation.IsPreviousFrameAvailable())
      {
         nRet = MyAnimation.MovePreviousFrame();
         if(nRet != SUCCESS)
            return nRet;
         MessageBox(hWndParent, TEXT("This frame is previous to last"),TEXT("Example"), MB_OK | MB_ICONINFORMATION);
      }
      else
         MessageBox(hWndParent, TEXT("Previous frame not available"),TEXT("Example"), MB_OK | MB_ICONINFORMATION);
   }
   else
      return nRet;
   return SUCCESS;
}