LAnimationWindow::IsPreviousFrameAvailable
#include "ltwrappr.h"
L_BOOL LAnimationWindow::IsPreviousFrameAvailable() const
Determines whether there is an existing frame prior to the current frame.
Returns
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
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. |
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; WRPUNLOCKSUPPORT(); MyAnimation.SetFileName(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\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; }