mp3remotedlg.cpp

本书通过实例介绍了嵌入式编程的方法与技巧书中例子具有实用性

#include "stdafx.h"
#include "MP3Remote.h"
#include "MP3RemoteDlg.h"
#include "Serial.h"

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

CSerial serObj;	

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()
CMP3RemoteDlg::CMP3RemoteDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMP3RemoteDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMP3RemoteDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMP3RemoteDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMP3RemoteDlg)
	DDX_Control(pDX, IDC_REWIND, m_rewind);
	DDX_Control(pDX, IDC_STOP, m_stop);
	DDX_Control(pDX, IDC_PLAY, m_play);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMP3RemoteDlg, CDialog)
	//{{AFX_MSG_MAP(CMP3RemoteDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_PLAY, OnPlay)
	ON_BN_CLICKED(IDC_STOP, OnStop)
	ON_BN_CLICKED(IDC_REWIND, OnRewind)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
BOOL CMP3RemoteDlg::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
	if(!serObj.Open(2,9600,'n',8,1))
	{
		  AfxMessageBox("failed to open Comm Port");
		  return FALSE;
	}
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}
void CMP3RemoteDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}
void CMP3RemoteDlg::OnPaint() 
{
	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();
	}
}
HCURSOR CMP3RemoteDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
void CMP3RemoteDlg::OnPlay() 
{
	m_play.EnableWindow(FALSE);
	m_rewind.EnableWindow(TRUE);
	m_stop.EnableWindow(TRUE);

	char buf[5];

	buf[0] = 0x02;               // STX
	buf[1] = 0x05;               // Length
	buf[2] = 2;                  // Play
	buf[3] = buf[1] ^ buf[2];    // CRC
	buf[4] = 0x03;               // ETX

	serObj.SendData(buf,5);
}


void CMP3RemoteDlg::OnStop() 
{
	m_play.EnableWindow(TRUE);
	m_rewind.EnableWindow(TRUE);
	m_stop.EnableWindow(FALSE);

	char buf[5];

	buf[0] = 0x02;               // STX
	buf[1] = 0x05;               // Length
	buf[2] = 3;                  // Stop
	buf[3] = buf[1] ^ buf[2];    // CRC
	buf[4] = 0x03;               // ETX

	serObj.SendData(buf,5);	
}

void CMP3RemoteDlg::OnRewind() 
{
	m_play.EnableWindow(FALSE);
	m_rewind.EnableWindow(FALSE);
	m_stop.EnableWindow(TRUE);

	char buf[5];

	buf[0] = 0x02;               // STX
	buf[1] = 0x05;               // Length
	buf[2] = 4;                  // Rewind
	buf[3] = buf[1] ^ buf[2];    // CRC
	buf[4] = 0x03;               // ETX

	serObj.SendData(buf,5);	
	
}