LAnimationWindow::GetAt

#include "ltwrappr.h"

L_INT LAnimationWindow::GetAt(nIndex, pBitmap, bReflectIndex = FALSE)

L_UINT nIndex;	/* position of the bitmap in the list */
LBitmapBase * pBitmap;	/* pointer to the bitmap handle */
L_BOOL bReflectIndex;	/* flag that indicates whether to set the current index to the passed index */

Gets an LBitmapBase object that references a bitmap in the class object's bitmap list.

Parameter	Description
nIndex	Position of the bitmap in the list. Use zero-based indexing. For example, if there are 10 bitmaps in a list, the index of the last one is 9.
pBitmap	Pointer to the bitmap handle that will reference the bitmap in the list.
bReflectIndex	Flag that indicates whether to set the current index to the passed index. Possible values are:
	Value	Meaning
	TRUE	Set the class objects current index to the passed index.
	FALSE	Do not set the class objects current index to the passed index.

Returns

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

Comments

The bitmap handle that this method gets is a copy of the bitmap handle stored internally in the list. If you modify the bitmap using this handle, you can update the internal bitmap handle to reflect the changes by using the LAnimationWindow::SetAt method.

You cannot use this method to update a bitmap list while it is being used in an animation playback.

Required DLLs and Libraries

LTKRN
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:	Class Members
Topics:	Raster Image Functions: Playing Animated Images
	Implementing Animation

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName
/*<documentation/>*/
class MyAnimationWindow : public LAnimationWindow
{
public :
   L_INT GetFrame(L_UINT nIndex, LBitmapBase  * pBitmap, L_BOOL bReflectIndex = FALSE)
   {
      return GetAt(nIndex, pBitmap, bReflectIndex);
   }
   L_INT SetFrame(L_UINT nIndex, LBitmapBase  * pBitmap, L_BOOL bReflectIndex = FALSE)
   {
      return SetAt(nIndex, pBitmap, bReflectIndex);
   }
   L_INT InsertFrame(LBitmapBase  * pBitmap, L_UINT nIndex)
   {
      return LAnimationWindow::InsertFrame(pBitmap, nIndex);
   }
   L_INT RemoveFrame(L_UINT nIndex, LBitmapBase  * pBitmap)
   {
      return LAnimationWindow::RemoveFrame(nIndex,pBitmap);
   }
};
L_INT GetAtExample(HWND hWndParent)
{
   L_INT nRet;
   LBase::LoadLibraries(LT_ALL_LEADLIB); 
 //make sure all libraries are loaded
   MyAnimationWindow MyAnimation;
   LBitmapBase bitmap;
   LBitmapBase newBitmap;
   LBitmapBase removedBitmap;
   WRPUNLOCKSUPPORT();
   MyAnimation.SetFileName(MAKE_IMAGE_PATH(TEXT("eye.gif")));
   nRet = MyAnimation.Load();
   if (nRet!=SUCCESS)
      return nRet;
   //Flip the first frame
   MyAnimation.GetFrame(0, &bitmap, FALSE);
   bitmap.Flip();
   MyAnimation.SetFrame(0, &bitmap, FALSE);
   //Remove the last frame, and replace it with new bitmap
   nRet = MyAnimation.RemoveFrame(MyAnimation.GetCount(), NULL);
   if (nRet!=SUCCESS)
      return nRet;
   nRet = newBitmap.Load(MAKE_IMAGE_PATH(TEXT("image4.gif")));
   if (nRet!=SUCCESS)
      return nRet;
   nRet = MyAnimation.InsertFrame(&newBitmap, (L_UINT)-1);
   // Replace the second item with new bitmap;
   if (nRet==SUCCESS)
   {
      MyAnimation.CreateWnd(hWndParent,0, WS_VISIBLE|WS_CHILD|WS_BORDER,0,0,300,300);
      for (L_UINT i=0; i<MyAnimation.GetCount(); i++)
      {
         nRet = MyAnimation.MoveToFrame(i);
         if(nRet != SUCCESS)
            return nRet;
         if (MyAnimation.IsFirstFrame())
         {
            MessageBox(hWndParent, TEXT("First frame..."),TEXT("Example"), MB_OK | MB_ICONINFORMATION);
         }
         else
            if (MyAnimation.IsLastFrame())
            {
               MessageBox(hWndParent, TEXT("Last frame..."),TEXT("Example"), MB_OK | MB_ICONINFORMATION);
            }
      }
   }
   else
      return nRet;
   return SUCCESS;
}