LPlayBack::GetIndex
#include "ltwrappr.h"
virtual L_INT LPlayBack::GetIndex()
Gets the list index of the current bitmap during animation playback.
Returns
The index of the current bitmap.
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
Functions: |
|
Topics: |
Raster Image Functions: Creating and Maintaining Lists of Images |
|
Example
This example uses LPlayBack::GetIndex and LPlayBack::SetIndex to skip
bitmaps during a playback.
L_INT LPlayBack__GetIndexExample(HWND hWnd, L_TCHAR *pszFileName) { L_INT nRet; L_UINT uState; /* Next state in the playback */ RECT rcUpdate; /* Source clipping rectangle used in playback */ RECT rcDisplay; /* Display rectangle used in playback */ HDC hdc; /* Device context of the current window */ L_UINT uIndex = 0; /* Current index to the bitmap list */ L_UINT uCount = 0; /* Number of bitmaps in the list */ LBitmapBase TargetBitmap; LBitmapList BitmapList; LPlayBack PlayBack; /* Animation playback */ /* Create the bitmap list from the input file (GIF or AVI) */ nRet = BitmapList.Load (pszFileName); if(nRet != SUCCESS) return nRet; /* Get a copy of the first image's bitmap handle */ TargetBitmap = BitmapList[0]; /* Use the client area as the display rectangle */ GetClientRect(hWnd,&rcDisplay); /* Get the number of bitmaps in the list */ uCount = BitmapList.GetItemsCount(); /* Create and run the playback */ nRet = PlayBack.Create(&TargetBitmap, &BitmapList); if(nRet != SUCCESS) return nRet; do { uState = PlayBack.Process(); switch(uState) { case PLAYSTATE_PRERENDER: uIndex = PlayBack.GetIndex(); nRet = PlayBack.SetIndex( ++uIndex); if(nRet != SUCCESS) return nRet; break; case PLAYSTATE_POSTRENDER: nRet = PlayBack.GetUpdateRect(&rcUpdate, TRUE); if(nRet != SUCCESS) return nRet; hdc = GetDC(hWnd); nRet = PlayBack.GetBitmap()->SetClipSrcRect(&rcUpdate); if(nRet != SUCCESS) return nRet; nRet = PlayBack.GetBitmap()->SetDstRect(&rcDisplay); if(nRet != SUCCESS) return nRet; nRet = PlayBack.GetBitmap()->SetClipDstRect(&rcDisplay); if(nRet != SUCCESS) return nRet; PlayBack.GetBitmap()->Paint()->SetDC(hdc); PlayBack.GetBitmap()->CreatePaintPalette (hdc); nRet = PlayBack.GetBitmap()->Paint()->PaintDC(); if(nRet != SUCCESS) return nRet; ReleaseDC(hWnd, hdc); break; } } while(uIndex < uCount); return SUCCESS; }