www.pudn.com > ImageVidwer.rar > Playlist.cpp

// Playlist.cpp: implementation of the CPlaylist class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "ImageViewer.h" 
#include "Playlist.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CPlaylist::CPlaylist() 
{ 
	m_CurrentFile = 0; 
	m_TotalFiles = 0; 
	m_FileList.RemoveAll(); 
	m_FilePath = L""; 
} 
 
CPlaylist::~CPlaylist() 
{ 
 
} 
 
CString CPlaylist::GetNextWorkFileName(bool bForword, bool bRandom) 
{ 
	if (bRandom)		// 随机获取 
	{ 
		// 计算随机数 
		MakeRandom(m_CurrentFile); 
		if (m_CurrentFile < m_TotalFiles - 1) 
		{ 
			m_CurrentFile++; 
		}  
		else 
		{ 
			m_CurrentFile = 0; 
		} 
	} 
	else 
	{ 
		if (bForword)			// 前一个文件 
		{ 
			if (m_CurrentFile > 0) 
			{ 
				m_CurrentFile--; 
			}  
			else 
			{ 
				m_CurrentFile = m_TotalFiles - 1; 
			} 
		}  
		else			// 后一个文件 
		{ 
			if (m_CurrentFile < m_TotalFiles - 1) 
			{ 
				m_CurrentFile++; 
			}  
			else 
			{ 
				m_CurrentFile = 0; 
			} 
		} 
	} 
	return m_FilePath + m_FileList.GetAt(m_CurrentFile); 
} 
 
unsigned int CPlaylist::MakeRandom(int MaxNumber) 
{ 
	return m_Seed[MaxNumber]; 
} 
 
void CPlaylist::InitSeed(int iNumber) 
{ 
	ZeroMemory(m_Seed,1024); 
	unsigned* iValue = (unsigned*)calloc(iNumber,sizeof(unsigned)); 
	int k = 0; 
	int tmp = 0; 
	for (int j = 0; j < iNumber; j++) 
	{ 
		iValue[j] = j; 
	} 
 
	for (int i = 0; i < iNumber; i++) 
	{ 
		srand(Random()); 
		k = rand() % iNumber; 
		tmp = iValue[k]; 
		iValue[k] = iValue[iNumber - k -1]; 
		iValue[iNumber - k -1] = tmp; 
	} 
 
	CopyMemory(m_Seed,iValue,iNumber * 4); 
	ZeroMemory(iValue,iNumber); 
}