windows-nt/Source/XPSP1/NT/shell/ext/sshow/imagescr.cpp

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2020-09-26 03:20:57 -05:00
#include "precomp.h"
#include "imagescr.h"
#include "waitcurs.h"
#include "ssutil.h"
#include "findthrd.h"
#include "ssmprsrc.h"
CImageScreenSaver::CImageScreenSaver( HINSTANCE hInstance,
bool bToolbarVisible )
:m_pPainter(NULL),
m_hInstance(hInstance),
m_bToolbarVisible(bToolbarVisible)
{
}
CImageScreenSaver::~CImageScreenSaver(void)
{
if (m_pPainter)
{
delete m_pPainter;
m_pPainter = NULL;
}
}
void CImageScreenSaver::ShowToolbar(bool bFlag)
{
m_bToolbarVisible = bFlag;
if(m_pPainter)
{
m_pPainter->SetToolbarVisible(bFlag);
}
}
bool CImageScreenSaver::IsValid(void) const
{
return(true);
}
HANDLE CImageScreenSaver::Initialize( HWND hwndNotify,
UINT nNotifyMessage,
HANDLE hEventCancel )
{
HANDLE hResult = NULL;
// Get the file extensions for the file types we are able to deal with
CSimpleString strExtensions;
m_GdiPlusHelper.ConstructDecoderExtensionSearchStrings(strExtensions);
// Start the image finding thread
TCHAR pBuffer[MAX_PATH] = {0};
::GetCurrentDirectory(MAX_PATH,(LPTSTR)&pBuffer);
hResult = CFindFilesThread::Find((LPTSTR) pBuffer,
strExtensions,
hwndNotify,
nNotifyMessage,
hEventCancel,
MAX_FAILED_FILES,
MAX_SUCCESSFUL_FILES,
MAX_DIRECTORIES );
// Return the thread handle
return hResult;
}
void CImageScreenSaver::OnInput()
{
if(m_pPainter)
{
m_pPainter->OnInput();
}
}
bool CImageScreenSaver::TimerTick( CSimpleDC &ClientDC )
{
if (m_pPainter && ClientDC.IsValid())
{
return m_pPainter->TimerTick( ClientDC );
}
return false;
}
void CImageScreenSaver::Paint( CSimpleDC &PaintDC )
{
if (m_pPainter && PaintDC.IsValid())
{
m_pPainter->SetToolbarVisible(m_bToolbarVisible);
m_pPainter->Paint( PaintDC );
}
}
bool CImageScreenSaver::ReplaceImage( bool bForward, bool bNoTransition )
{
CSimpleString strCurrentFile;
if (m_pPainter)
{
delete m_pPainter;
m_pPainter = NULL;
}
if (m_FindImageFiles.Count())
{
// exit the loop when we get a valid image or we've exhausted the list
int nNumTries = 0;
while (!m_pPainter && nNumTries < m_FindImageFiles.Count())
{
CSimpleString strNextFile;
bool bNextFile = bForward ? m_FindImageFiles.NextFile(strNextFile) : m_FindImageFiles.PreviousFile(strNextFile);
if (bNextFile)
{
CSimpleDC ClientDC;
if (ClientDC.GetDC(NULL))
{
CBitmapImage *pBitmapImage = new CBitmapImage;
if (pBitmapImage)
{
if (pBitmapImage->Load( ClientDC,
strNextFile,
m_rcClient,
MAX_SCREEN_PERCENT,
ALLOW_STRECTCHING,
false ))
{
m_pPainter = new CSimpleTransitionPainter( pBitmapImage,
ClientDC,
m_rcClient,
m_bToolbarVisible );
//
// If we couldn't create a painter, delete the bitmap
//
if (!m_pPainter)
{
delete pBitmapImage;
}
}
else
{
delete pBitmapImage;
}
}
}
}
nNumTries++;
}
}
return(m_pPainter != NULL);
}