#include "ltwrappr.h"
L_BOOL LAnimationWindow::IsPreviousFrameAvailable() const
Determines whether there is an existing frame prior to the current frame.
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. |
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. |
Win32, x64.
The following example behaves oppositely to PlayAnimation using IsPreviousFrameAvailable
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName
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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