repos_ecs/其他2015后/光盘刻录类/Nero 1.08SDK与例子/NeroSDK-1.08/NeroVisionAPI/Samples/NVAPIExample/PagePreview.cpp

// PagePreview.cpp : implementation file
//

#include "stdafx.h"
#include "NVAPIExample.h"
#include "NVAPIExampleDlg.h"
#include "PagePreview.h"
#include "PageData.h"
#include "Sheet.h"
#include "math.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CPagePreview dialog


CPagePreview::CPagePreview(CSheet * pParent)
	: CPage(CPagePreview::IDD, pParent)
{
	//{{AFX_DATA_INIT(CPagePreview)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT

	m_preview = 0;
}

void CPagePreview::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPagePreview)
	DDX_Control(pDX, IDC_PREVIEW_SLIDER, m_slider);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CPagePreview, CDialog)
	//{{AFX_MSG_MAP(CPagePreview)
	ON_WM_HSCROLL()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPagePreview message handlers

bool CPagePreview::Create (void)
{
	// This is a CPage virtual function. Just create the dialog and return
	// success.
	// 
	return CDialog::Create (m_lpszTemplateName, m_pParentWnd) != FALSE;
}

bool CPagePreview::OnBack (void)
{
	// go back to first page
	CNVAPIExampleDlg * pParentSheet = (CNVAPIExampleDlg *) GetParent();
	if (pParentSheet)
		pParentSheet->SwitchPage(0);
	return true;
}

void CPagePreview::OnChangeState (bool bActivate, bool bForward)
{
	// always preview all title, because there is no way to unselect item in a tree view
	if (bForward)
	{
		CPageData * pPageData = GetPageData ();
		if (pPageData)	
		{
			// prepare preview struct
			BOOL bSuccess = pPageData->m_pProject->SetXMLString ((LPSTR)(LPCSTR) pPageData->m_sXML);
			if (bSuccess)
			{
				m_preview->SetPreviewContext(pPageData->m_pProject, (wchar_t*)0);

				NeroVisionAPI::IErrorPtr err = m_preview->LastError;
				if (err->ErrCode != NeroVisionAPI::NoError)
					MessageBox(err->ErrText);

				// set preview window
				RECT previewRect;
				CWnd* frame = GetDlgItem(IDC_PREVIEWFRAME);
				if (frame)	{
					frame->GetClientRect(&previewRect);
					m_preview->SetPreviewWindow((long)frame->GetSafeHwnd(), previewRect.left, previewRect.top, previewRect.right, previewRect.bottom);
					m_preview->StartPreview();
					m_preview->BackgroundColor = RGB(0, 0, 32);
					m_preview->Callback = this;
					UpdateWindow();
				}
			}
		}
	}
	else
	{
		// stop preview before leave the page
		m_preview->StopPreview();
	}
}

BOOL CPagePreview::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	if (FAILED(m_preview.CreateInstance(__uuidof(NeroVisionAPI::Preview))))
		m_preview = 0;

	m_slider.SetRange(0, 1000);

	return TRUE;  // return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}


STDMETHODIMP CPagePreview::raw_NotifyPosChanged(double pos, int title, int chapter)
{
    TCHAR buf[100];
	// show time and position of the playing title
    double durSec = m_preview->GetDuration();
	if (fabs(pos) > 0.01 && long(durSec / pos) < 1000)	{
		// wrong value send by IPreview when viewing menu
		if (m_setSlider)	
		{
			m_slider.SetPos(long(1000 * pos / durSec));
		}
		int durMin = int(durSec / 60);
		durSec -= durMin * 60;
		int posMin = int(pos / 60);
		pos -= posMin * 60;
		_stprintf(buf, TEXT("Title %d - Chapter %d - Time %02d:%04.1lf / %02d:%04.1lf"), title, chapter, posMin, pos, durMin, durSec);
		SetDlgItemText(IDC_PREVIEW_TEXT, buf);
	}
    return S_OK;
}

STDMETHODIMP CPagePreview::raw_NotifyPlaybackEnd()
{
	m_slider.SetPos(0);
    SetDlgItemText(IDC_PREVIEW_TEXT, TEXT(""));
    return S_OK;
}

void CPagePreview::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	// when user move slider position, try change preview position
	double dur = m_preview->GetDuration();
	if (dur > 0)	
	{
		m_preview->put_Position(double(m_slider.GetPos()) * dur / 1000);
	}
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}