Source code of Windows XP (NT5)
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/*******************************************************************************
*
* (C) COPYRIGHT MICROSOFT CORPORATION, 1998
*
* TITLE: SSHNDLER.H
*
* VERSION: 1.0
*
* AUTHOR: ShaunIv
*
* DATE: 12/4/1999
*
* DESCRIPTION:
*
*******************************************************************************/
#ifndef __SSHNDLER_H_INCLUDED
#define __SSHNDLER_H_INCLUDED
#include <windows.h>
#include "imagescr.h"
#include "extimer.h"
#include "simstr.h"
#include "findthrd.h"
//
// We will shuffle the list every [SHUFFLE_INTERVAL] images until we are done gathering files.
//
#define SHUFFLE_INTERVAL 50
//
// To decrease the tendency to see the same image first, we will try to vary the image that
// causes the screensaver to be started to a random image index less than this number
//
#define MAX_START_IMAGE 20
//
// Number of ms to wait before starting up the screensaver timers
// in case we don't find an image before this timer runs.
//
#define BACKUP_START_TIMER_PERIOD 5000
class CScreenSaverHandler
{
private:
CImageScreenSaver *m_pImageScreenSaver;
HINSTANCE m_hInstance;
CSimpleString m_strRegistryPath;
HWND m_hWnd;
UINT m_nPaintTimerId;
UINT m_nChangeTimerId;
UINT m_nBackupStartTimerId;
UINT m_nBackupStartTimerPeriod;
UINT m_nFindNotifyMessage;
bool m_bPaused;
CExclusiveTimer m_Timer;
HANDLE m_hFindThread;
HANDLE m_hFindCancel;
bool m_bScreensaverStarted;
int m_nStartImage;
int m_nShuffleInterval;
CRandomNumberGen m_Random;
private:
// No implementation
CScreenSaverHandler(void);
CScreenSaverHandler( const CScreenSaverHandler & );
CScreenSaverHandler &operator=( const CScreenSaverHandler & );
public:
void Initialize(void);
CScreenSaverHandler( HWND hWnd, UINT nFindNotifyMessage, UINT nPaintTimer, UINT nChangeTimer, UINT nBackupStartTimer, LPCTSTR szRegistryPath, HINSTANCE hInstance );
~CScreenSaverHandler(void);
// Message handlers
bool HandleKeyboardMessage( UINT nMessage, WPARAM nVirtkey );
void HandleConfigChanged(void);
void HandleTimer( WPARAM nEvent );
void HandlePaint(void);
void HandleFindFile( CFoundFileMessageData *pFoundFileMessageData );
};
#endif // __SSHNDLER_H_INCLUDED