VC++开发一个简易图片浏览器 - 含目录浏览功能

浅浅的花香味﹌ 2023-01-05 14:21 285阅读 0赞

win7, vc6;  新建一个对话框工程；界面；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70][]

添加按钮单击函数；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 1][]

为控件添加成员变量；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 2][]

添加列表框消息处理函数；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 3][]

搞几个测试图片；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 4][]

对话框头文件手动添加成员函数 ShowJpg；

// Construction  
public:  
    CTestjpgDlg(CWnd\* pParent = NULL);    // standard constructor  
    bool ShowJpg(CDC\* ,CString , int , int);

对话框Cpp文件全部代码如下；

// testjpgDlg.cpp : implementation file
    //
    
    #include "stdafx.h"
    #include "testjpg.h"
    #include "testjpgDlg.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()
    
    /
    // CTestjpgDlg dialog
    
    CTestjpgDlg::CTestjpgDlg(CWnd* pParent /*=NULL*/)
    	: CDialog(CTestjpgDlg::IDD, pParent)
    {
    	//{
       {AFX_DATA_INIT(CTestjpgDlg)
    	m_names = _T("");
    	//}}AFX_DATA_INIT
    	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
    	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
    }
    
    void CTestjpgDlg::DoDataExchange(CDataExchange* pDX)
    {
    	CDialog::DoDataExchange(pDX);
    	//{
       {AFX_DATA_MAP(CTestjpgDlg)
    	DDX_Control(pDX, IDC_LIST1, m_list1);
    	DDX_Text(pDX, IDC_EDIT1, m_names);
    	//}}AFX_DATA_MAP
    }
    
    BEGIN_MESSAGE_MAP(CTestjpgDlg, CDialog)
    	//{
       {AFX_MSG_MAP(CTestjpgDlg)
    	ON_WM_SYSCOMMAND()
    	ON_WM_PAINT()
    	ON_WM_QUERYDRAGICON()
    	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
    	ON_LBN_SELCHANGE(IDC_LIST1, OnSelchangeList1)
    	//}}AFX_MSG_MAP
    END_MESSAGE_MAP()
    
    /
    // CTestjpgDlg message handlers
    
    BOOL CTestjpgDlg::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
    	
    	return TRUE;  // return TRUE  unless you set the focus to a control
    }
    
    void CTestjpgDlg::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 CTestjpgDlg::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 CTestjpgDlg::OnQueryDragIcon()
    {
    	return (HCURSOR) m_hIcon;
    }
    
    void CTestjpgDlg::OnButton1() 
    {
    	// TODO: Add your control notification handler code here
    	CString sFolderPath;
            BROWSEINFO bi;
            char Buffer[MAX_PATH];
            
    		bi.hwndOwner = NULL;
            bi.pidlRoot =NULL;
            bi.pszDisplayName = Buffer;
            bi.lpszTitle = "选择目录";
            //bi.ulFlags = BIF_BROWSEINCLUDEFILES;//包括文件
            bi.ulFlags = BIF_EDITBOX;//包括文件
    
            bi.lpfn = NULL;
            bi.iImage=IDR_MAINFRAME;
            
            LPITEMIDLIST pIDList = SHBrowseForFolder(&bi);//显示选择对话框
            if(pIDList)
            {
                   SHGetPathFromIDList(pIDList, Buffer);
                   //取得文件夹路径到Buffer里
                   sFolderPath = Buffer;//将文件夹路径保存在一个CString对象里
            }
    
            LPMALLOC lpMalloc;
            if(FAILED(SHGetMalloc(&lpMalloc)))
                    return;
    
            lpMalloc->Free(pIDList);
            lpMalloc->Release();
            m_names = sFolderPath;
    		UpdateData(FALSE);
    
    		SetCurrentDirectory(sFolderPath);
    		CFileFind finder;
    		BOOL bw = finder.FindFile("*.jpg");
    		while(bw)
    		{
    		   bw=finder.FindNextFile();		   
    		   m_list1.AddString(finder.GetFileName());
    		}
    
    }
    
    void CTestjpgDlg::OnSelchangeList1() 
    {
    	// TODO: Add your control notification handler code here
    	CString strText;
    	int nCurSel;          
        nCurSel = m_list1.GetCurSel();
        m_list1.GetText(nCurSel, strText); 
    	CDC* pDC1 = GetDlgItem(IDC_STATIC)->GetDC();
    	ShowJpg(pDC1,m_names + "\\" + strText ,0,0);	
    }
    
    bool CTestjpgDlg::ShowJpg(CDC* pDC,CString strPath, int x, int y)
    {
        IStream *pStm; 
        CFileStatus fstatus; 
        CFile file; 
        LONG cb;
    
    	//MessageBox(strPath,"选择的文件is：",MB_OK);
        if (file.Open(strPath,CFile::modeRead)&&file.GetStatus(strPath,fstatus)&&((cb = fstatus.m_size) != -1)) 
        { 
            HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb); 
            LPVOID pvData = NULL; 
    
            if (hGlobal != NULL) 
            { 
                pvData = GlobalLock(hGlobal);
                if (pvData != NULL) 
                { 
                    file.Read(pvData, cb); 
                    GlobalUnlock(hGlobal); 
                    CreateStreamOnHGlobal(hGlobal, TRUE, &pStm); 
                }
            }
        }
        else
        {
            return false;
        }
    
        IPicture *pPic = NULL;
    
        if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,IID_IPicture,(LPVOID*)&pPic)))
        {
            OLE_XSIZE_HIMETRIC hmWidth; 
            OLE_YSIZE_HIMETRIC hmHeight; 
    
            pPic->get_Width(&hmWidth); 
            pPic->get_Height(&hmHeight); 
            double fX,fY;
    
            //get image height and width
            fX = (double)pDC->GetDeviceCaps(HORZRES)*(double)hmWidth/((double)pDC->GetDeviceCaps(HORZSIZE)*100.0); 
            fY = (double)pDC->GetDeviceCaps(VERTRES)*(double)hmHeight/((double)pDC->GetDeviceCaps(VERTSIZE)*100.0);         
    
            //use render function display image
            if(FAILED(pPic->Render(*pDC,x,y,(DWORD)fX,(DWORD)fY,0,hmHeight,hmWidth,-hmHeight,NULL))) 
            {
                pPic->Release();
                return false;
            }
            pPic->Release();
        } 
        else 
            return false; 
        return true;
    }

运行；如下二图；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 5][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 7][]

有时间再继续；

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70]: /images/20221119/09666a2e7f074310bea619089035d9f7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 1]: /images/20221119/82f8a652b27c47a9bef1f0e6081918f8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 2]: /images/20221119/d1ec18519ecf4f458bd8dcafd4ef2aa6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 3]: /images/20221119/a894a901371546b3ba336b0ce01af71d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20210113040550716.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 5]: https://img-blog.csdnimg.cn/20210113040602204.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 6]: https://img-blog.csdnimg.cn/2021011304061494.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 7]: https://img-blog.csdnimg.cn/20210113041517414.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24=,size_16,color_FFFFFF,t_70