fftdlg.cpp

基于vc编写的正弦信号的傅立叶变换程序

// fftDlg.cpp : implementation file
//

#include "stdafx.h"
#include "fft.h"
#include "fftDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFftDlg dialog

CFftDlg::CFftDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFftDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFftDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CFftDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFftDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CFftDlg, CDialog)
	//{{AFX_MSG_MAP(CFftDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFftDlg message handlers

BOOL CFftDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}
	
	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	xinEX = new COMPX[256];
	sine_generate(xinEX);
	CString str;
	str.Format("%f", xinEX[2].real);

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CFftDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CFftDlg::OnPaint() 
{
	SinPaint();
//	MessageBox(str);
	if (IsIconic())
	{   
		CPaintDC dc(this); // device context for painting
        
		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CFftDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CFftDlg::OnFftfunc() 
{
	// TODO: Add your control notification handler code here
	
	FFT(xinEX, 256);
//	AfxMessageBox("FFT 变换完成！");
	CWnd* pWnd=GetDlgItem(IDC_EDIT_FFT);
	CDC* pDC=pWnd->GetDC();
	
	pDC->MoveTo(10, 300);
	for(int i=0;i<256;i++)
		pDC->LineTo(10 + i, 300 + (float)xinEX[i].real * 100);
}

void CFftDlg::SinPaint()
{
	CWnd* pwnd=GetDlgItem(IDC_EDIT_SINE);
	CDC* p=pwnd->GetDC();
	
	p->MoveTo(10, 100);
	for(int i=0;i<256;i++)
		p->LineTo(10 + i, 100 + (float)xinEX[i].real * 10);
}



void CFftDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
//	sine_generate(*xinEX);
    CWnd* pwnd=GetDlgItem(IDC_EDIT_SINE);
	CDC* p=pwnd->GetDC();
}