mididlg.cpp

Visual_C++.NET实用编程百例

// midiDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "midi.h"
#include "midiDlg.h"
#include ".\mididlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

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

// 对话框数据
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

// 实现
protected:
	DECLARE_MESSAGE_MAP()
};

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

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

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CmidiDlg 对话框



CmidiDlg::CmidiDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CmidiDlg::IDD, pParent)
	, m_fileName(_T(""))
	, m_strStatus(_T(""))
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CmidiDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_PROGRESS1, m_Pro);
}

BEGIN_MESSAGE_MAP(CmidiDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_BUTTON1, OnBnClickedButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnBnClickedButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnBnClickedButton3)
	ON_BN_CLICKED(IDC_BUTTON4, OnBnClickedButton4)
	ON_BN_CLICKED(IDC_BUTTON5, OnBnClickedButton5)
	ON_WM_TIMER()
END_MESSAGE_MAP()


// CmidiDlg 消息处理程序

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

	// 将\“关于...\”菜单项添加到系统菜单中。

	// IDM_ABOUTBOX 必须在系统命令范围内。
	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);
		}
	}

	// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
	//  执行此操作
	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标

	// TODO: 在此添加额外的初始化代码
	
	return TRUE;  // 除非设置了控件的焦点，否则返回 TRUE
}

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

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CmidiDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // 用于绘制的设备上下文

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// 使图标在工作矩形中居中
		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;

		// 绘制图标
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

//当用户拖动最小化窗口时系统调用此函数取得光标显示。
HCURSOR CmidiDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CmidiDlg::OnBnClickedButton1()
{
	SetTimer(TIMER_ID,1000,NULL);
	DWORD news=m_midi.Play (this->GetSafeHwnd() ,m_fileName);
	if(m_midi.m_Status ==Played)
		m_strStatus="正在播放";
	else
		m_strStatus="播放失败";
	SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
}

void CmidiDlg::OnBnClickedButton2()
{
	if(m_midi.m_Status ==Played)
	{
		m_midi.Pause ();
		if(m_midi.m_Status ==Paused)
		{
            m_strStatus="已经暂停";
			SetDlgItemText(IDC_BUTTON2,"继续");
		}
		else
			m_strStatus="暂停失败";
		SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
	}
	else if(m_midi.m_Status ==Paused)
	{
		m_midi.Resume ();
		if(m_midi.m_Status ==Played)
		{
			m_strStatus="正在播放";
			SetDlgItemText(IDC_BUTTON2,"暂停");
		}
		else
		{
			AfxMessageBox(m_midi.m_Status);
			m_strStatus="播放失败";
		}
		SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
	}

}

void CmidiDlg::OnBnClickedButton3()
{
	m_midi.Stop ();
	if(m_midi.m_Status ==Stoped)
		m_strStatus="已经停止";
	SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
	
}

void CmidiDlg::OnBnClickedButton4()
{
	m_midi.Close ();
	if(m_midi.m_Status ==Closed)
		m_strStatus="已经关闭";
	else
		m_strStatus="关闭失败";
	SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
}

void CmidiDlg::OnBnClickedButton5()
{
	if(m_midi.m_Status ==Opened)
		m_midi.Close ();
	CFileDialog dlg(true, "","", OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT, "Midi文件(*.mid)|*.mid|");
	if(dlg.DoModal ()==IDOK)
	{
		m_fileName=dlg.GetFileName ();
		if(m_fileName!="")
			SetDlgItemText(IDC_STATUS,m_fileName.GetString ());
	}
	if(m_midi.Open (m_fileName)!=0)
	{
		m_strStatus="打开失败";
		SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
	}
	m_strStatus ="已经打开";
	SetDlgItemText(IDC_STATUS,m_strStatus.GetString());
}

void CmidiDlg::OnTimer(UINT nIDEvent)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	DWORD t=m_midi.GetStatus (MCI_STATUS_CURRENT_TRACK,this->GetSafeHwnd ());
	if(m_midi.GetStatus (MCI_STATUS_LENGTH,this->GetSafeHwnd ())!=0)
	{
		m_Pro.SetPos ((m_midi.GetStatus (MCI_STATUS_POSITION,this->GetSafeHwnd ())*100)/m_midi.GetStatus (MCI_STATUS_LENGTH,this->GetSafeHwnd ()));
		DWORD curPos=m_midi.GetStatus (MCI_STATUS_POSITION,this->GetSafeHwnd ());
		DWORD length=m_midi.GetStatus (MCI_STATUS_LENGTH,this->GetSafeHwnd ());
		CString str;
		str.Format ("%lu/%lu",curPos,length);
		SetDlgItemText(IDC_POSITION,str.GetString());
	}
	else
	{
		m_Pro.SetPos (0);
		CString str;
		str.Format ("%lu/%lu",0,0);
		SetDlgItemText(IDC_POSITION,str.GetString());
	}
	CDialog::OnTimer(nIDEvent);
}

// 获取设备信息