piccompressencodedlg.cpp

本程序是用VC++6.0开发的BMP转JPEG格式的图片压缩源程序

// PicCompressEncodeDlg.cpp : implementation file
//

#include "stdafx.h"
#include "PicCompressEncode.h"
#include "PicCompressEncodeDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CPicCompressEncodeDlg dialog

CPicCompressEncodeDlg::CPicCompressEncodeDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPicCompressEncodeDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CPicCompressEncodeDlg)
	m_InputFileName = _T("");
	m_OutputFileName = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	
}

void CPicCompressEncodeDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPicCompressEncodeDlg)
	DDX_Control(pDX, IDC_EDIT2, m_quality);
	DDX_Text(pDX, IDC_EDIT3, m_InputFileName);
	DDX_Text(pDX, IDC_EDIT4, m_OutputFileName);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPicCompressEncodeDlg, CDialog)
	//{{AFX_MSG_MAP(CPicCompressEncodeDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDRead, OnRead)
	ON_BN_CLICKED(IDCompress, OnCompress)
	//ON_BN_CLICKED(IDSave, OnSave)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPicCompressEncodeDlg message handlers

BOOL CPicCompressEncodeDlg::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
	char* quality="50"; 
	m_quality.SetWindowText(LPCTSTR(quality));
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CPicCompressEncodeDlg::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 CPicCompressEncodeDlg::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();
	}
}

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

void CPicCompressEncodeDlg::OnRead() 
{
	// TODO: Add your control notification handler code here
	CString fileName;
	CFileDialog fileDlg(TRUE, "*.bmp", "*.bmp", OFN_PATHMUSTEXIST|OFN_FILEMUSTEXIST,
		"位图文件 (*.bmp)|*.bmp|");
	
	if(fileDlg.DoModal() == IDOK)
	{
		fileName.Format("%s", fileDlg.GetPathName());
		m_InputFileName = fileName;
		m_OutputFileName = "";
		UpdateData(FALSE);
		pO.Load(fileName);
	}
	
}

void CPicCompressEncodeDlg::OnCompress() 
{
	// TODO: Add your control notification handler code here
	
	
	if(strlen(m_InputFileName) == 0)
	{
		AfxMessageBox("没有选择输入的BMP文件!");
		return;
	}
	char qualityNum[10];
	int quality;
	m_quality.GetWindowText(qualityNum, 10);
    quality =  atoi(qualityNum);
	if(!(quality >0 && quality <= 100))
	{
		AfxMessageBox("压缩质量值应该在0~100之间!");
		return;
	}

	CString fileName;
	CFileDialog fileDlg(FALSE, "*.jpg", "*.jpg", OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,
		"JPG文件 (*.jpg)|*.jpg|");
	if(fileDlg.DoModal() == IDOK)
	{
		fileName.Format("%s", fileDlg.GetPathName());
		m_OutputFileName = fileName;
		UpdateData(FALSE);
		pO.picCompressEncode(fileName, TRUE, quality);
	}
	
}