//獲得位圖句柄 
void CMovePictureDlg::GetHandleFromPath(CString path) 
{ 
    hBitmap= (HBITMAP)::LoadImage(AfxGetInstanceHandle(),path,IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION|LR_LOADFROMFILE);//創(chuàng)建位圖句柄 
}

//獲取位圖對(duì)象 

void CMovePictureDlg::GetBitMap(HBITMAP hBitmap) 

{ 

   m_BitMap.Attach(hBitmap);//通過(guò)位圖句柄創(chuàng)建位圖對(duì)象 

 
    //獲取圖像信息 

    BITMAPINFOHEADER bminfo;  

    m_BitMap.GetObject(sizeof(bminfo),&bminfo);  

 
//獲取位圖寬高 

    m_nBmpWidth=bminfo.biWidth; 

    m_nBmpHeight=bminfo.biHeight; 

}

// MovePictureDlg.h : header file 
// 
#include "PictureBox.h" 

#if !defined(AFX_MOVEPICTUREDLG_H__6FFC1DDF_478C_43D6_B854_4D51E98D5E50__INCLUDED_)
#define AFX_MOVEPICTUREDLG_H__6FFC1DDF_478C_43D6_B854_4D51E98D5E50__INCLUDED_

#if _MSC_VER > 1000 
#pragma once 
#endif // _MSC_VER > 1000 

///////////////////////////////////////////////////////////////////////////// 
// CMovePictureDlg dialog 

class CMovePictureDlg : public CDialog 
{ 
// Construction 
public: 
    void GetBitMap(HBITMAP hBitmap); 
    void GetHandleFromPath(CString path); 
    void SetPicRect(int x,int y); 
    void SetSysPath(); 
    CMovePictureDlg(CWnd* pParent = NULL);  // standard constructor 

// Dialog Data 
    //{{AFX_DATA(CMovePictureDlg) 
    enum { IDD = IDD_MOVEPICTURE_DIALOG }; 
    CEdit   m_editF; 
    CEdit   m_editDV; 
    //}}AFX_DATA 

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

// Implementation 
protected: 
    HICON m_hIcon; 

    // Generated message map functions 
    //{{AFX_MSG(CMovePictureDlg) 
    virtual BOOL OnInitDialog(); 
    afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 
    afx_msg void OnPaint(); 
    afx_msg HCURSOR OnQueryDragIcon(); 
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point); 
    afx_msg void OnMouseMove(UINT nFlags, CPoint point); 
    afx_msg void OnLButtonUp(UINT nFlags, CPoint point); 
    afx_msg void OnTimer(UINT nIDEvent); 
    afx_msg void OnDestroy(); 
    //}}AFX_MSG 
    DECLARE_MESSAGE_MAP() 
private: 
    CString sysPath;//保存系統(tǒng)路徑 
    CString bmpPath;//位圖路徑 

    HBITMAP hBitmap;//位圖句柄 
    CBitmap m_BitMap;//位圖對(duì)象 
    int m_nBmpWidth;//位圖寬度 
    int m_nBmpHeight;//位圖高度 

    CPictureBox* pictureBox;//圖片控件 
    CRect picRect;//控件所占區(qū)域 
    BOOL isSelect;//判斷控件是否被選中 

    BOOL isDown;//判斷鼠標(biāo)是否按下 

    CPoint oldPoint;//鼠標(biāo)原始位置 

    CPoint startPoint;//移動(dòng)起始位置 

    SYSTEMTIME startTime;//開(kāi)始時(shí)間 
    SYSTEMTIME endTime;//結(jié)束時(shí)間 

    double vx;//x方向速度 
    double vy;//y方向速度 

    double f;//阻力 
    double dv;//動(dòng)力增量 

    CRect clientRect;//客戶區(qū)域 
}; 

//{{AFX_INSERT_LOCATION}} 
// Microsoft Visual C++ will insert additional declarations immediately before the previous line. 

#endif // !defined(AFX_MOVEPICTUREDLG_H__6FFC1DDF_478C_43D6_B854_4D51E98D5E50__INCLUDED_)

// MovePictureDlg.cpp : implementation file 
// 

#include "stdafx.h" 
#include "MovePicture.h" 
#include "MovePictureDlg.h" 
#include <math.h> 

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

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

//計(jì)算時(shí)間差  
inline   __int64   TimeDiff(SYSTEMTIME left,SYSTEMTIME right)  
{  
    CTime   tmLeft(left.wYear,left.wMonth,left.wDay,0,0,0);  
    CTime   tmRight(left.wYear,left.wMonth,left.wDay,0,0,0);  
    CTimeSpan   sp;  
    sp   =   tmLeft   -   tmRight;//計(jì)算日期比較麻煩，就交給MFC去做吧  
    long   lLMinllis   =   (left.wHour*3600   +   left.wMinute*60   +   left.wSecond)*1000   +   left.wMilliseconds;  
    long   lRMinllis   =   (right.wHour*3600   +   right.wMinute*60   +   right.wSecond)*1000   +   right.wMilliseconds;  

    return   (__int64)sp.GetDays()*86400000   +   (lLMinllis   -   lRMinllis); 
} 

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() 

///////////////////////////////////////////////////////////////////////////// 
// CMovePictureDlg dialog 

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

    isDown = FALSE;//初始化鼠標(biāo)按下?tīng)顟B(tài) 
    isSelect = FALSE;//初始化選中狀態(tài) 
    f = 0.05;//初始化阻力 
    dv = 5;//初始化動(dòng)力增量 
} 

void CMovePictureDlg::DoDataExchange(CDataExchange* pDX) 
{ 
    CDialog::DoDataExchange(pDX); 
    //{{AFX_DATA_MAP(CMovePictureDlg) 
    DDX_Control(pDX, IDC_EDITF, m_editF); 
    DDX_Control(pDX, IDC_EDITDV, m_editDV); 
    //}}AFX_DATA_MAP 
} 

BEGIN_MESSAGE_MAP(CMovePictureDlg, CDialog) 
    //{{AFX_MSG_MAP(CMovePictureDlg) 
    ON_WM_SYSCOMMAND() 
    ON_WM_PAINT() 
    ON_WM_QUERYDRAGICON() 
    ON_WM_LBUTTONDOWN() 
    ON_WM_MOUSEMOVE() 
    ON_WM_LBUTTONUP() 
    ON_WM_TIMER() 
    ON_WM_DESTROY() 
    //}}AFX_MSG_MAP 
END_MESSAGE_MAP() 

///////////////////////////////////////////////////////////////////////////// 
// CMovePictureDlg message handlers 

//對(duì)話框初始化 
BOOL CMovePictureDlg::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 

    pictureBox = (CPictureBox*)GetDlgItem(IDC_PICTUREBOX);//獲得圖片框指針 

    SetSysPath();//設(shè)置系統(tǒng)路徑 

    bmpPath = sysPath+"http://image.bmp";//設(shè)置位圖路徑 

    GetHandleFromPath(bmpPath);//創(chuàng)建位圖句柄 

    GetBitMap(hBitmap);//獲得位圖 

    //設(shè)置位圖控件區(qū)域 
    SetPicRect(0,0); 

    pictureBox->MoveWindow(picRect);//設(shè)置控件位置 

    //設(shè)置文本框值 
    CString strDV,strF; 
    strDV.Format("%f",dv); 
    strF.Format("%f",f); 

    m_editDV.SetWindowText(strDV); 
    m_editF.SetWindowText(strF); 
    return TRUE;  // return TRUE  unless you set the focus to a control 
} 

void CMovePictureDlg::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. 

//重繪函數(shù) 
void CMovePictureDlg::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 
    { 

        this->GetClientRect(&clientRect);//獲得客戶區(qū)域大小 

        pictureBox->SetBitmap(hBitmap);//顯示位圖 
        CDialog::OnPaint(); 
    } 

} 

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

//鼠標(biāo)左鍵按下 
void CMovePictureDlg::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
    // TODO: Add your message handler code here and/or call default 

    isDown=TRUE;//鼠標(biāo)按下 

    if(PtInRect(picRect,point))//鼠標(biāo)在圖片區(qū)域按下 
    { 
        isSelect=TRUE;//圖片選中 

        oldPoint = point;//記錄下鼠標(biāo)位置 
        startPoint = point;//記錄下鼠標(biāo)起始位置 

        GetSystemTime(&startTime);//得到當(dāng)前時(shí)間 
    } 

    CDialog::OnLButtonDown(nFlags, point); 
} 

//鼠標(biāo)左鍵彈起 
void CMovePictureDlg::OnLButtonUp(UINT nFlags, CPoint point)  
{ 
    // TODO: Add your message handler code here and/or call default 

    isDown=FALSE;//鼠標(biāo)彈起 

    if(isSelect) 
    { 
        CString strDV,strF; 
        m_editDV.GetWindowText(strDV); 
        m_editF.GetWindowText(strF); 

        dv = atof(strDV); 
        f = atof(strF);  

        isSelect=FALSE;//釋放圖片 

        GetSystemTime(&endTime);//得到當(dāng)前時(shí)間 

        double dx = point.x-startPoint.x;//計(jì)算x軸位移 
        double dy = point.y-startPoint.y;//計(jì)算y軸位移 

        int s = TimeDiff(endTime,startTime);//計(jì)算時(shí)間差 

        //double r = sqrt(dx*dx+dy*dy);//計(jì)算鼠標(biāo)位移長(zhǎng)度 
        //double v=r/s;//求平均速度 

        vx=dv*dx/s;//x軸平均速度 
        vy=dv*dy/s;//y軸平均速度 

        SetTimer(1,1,NULL);//設(shè)置定時(shí)器 
    } 

    CDialog::OnLButtonUp(nFlags, point); 
} 

//鼠標(biāo)移動(dòng) 
void CMovePictureDlg::OnMouseMove(UINT nFlags, CPoint point)  
{ 
    // TODO: Add your message handler code here and/or call default 

    if(isDown&&isSelect)//在鼠標(biāo)按下?tīng)顟B(tài)下移動(dòng) 
    { 
        int dx = point.x-oldPoint.x;//計(jì)算x值的相對(duì)變化 
        int dy = point.y-oldPoint.y;//計(jì)算y值的相對(duì)變化 

        //重新設(shè)置PictureBox位置 
        picRect.left=picRect.left+dx; 
        picRect.top=picRect.top+dy; 

        SetPicRect(picRect.left,picRect.top);//重置圖片位置 

        pictureBox->MoveWindow(picRect.left,picRect.top,m_nBmpWidth,m_nBmpHeight);//改變圖片框大小 

        oldPoint=point;//重置原始坐標(biāo) 
    } 

    CDialog::OnMouseMove(nFlags, point); 
} 

//設(shè)置系統(tǒng)路徑 
void CMovePictureDlg::SetSysPath() 
{ 
    //獲取當(dāng)前路徑，保存到字符數(shù)組strBuff中 
    char strBuff[256]; 
    GetCurrentDirectory(256,strBuff);  
    sysPath.Format("%s",strBuff);//將路徑保存到全局變量中 
} 

//設(shè)置控件區(qū)域 
void CMovePictureDlg::SetPicRect(int x, int y) 
{ 
    picRect.top=y; 
    picRect.bottom=picRect.top+m_nBmpHeight; 
    picRect.left=x; 
    picRect.right=picRect.left+m_nBmpWidth; 
} 

//獲得位圖句柄 
void CMovePictureDlg::GetHandleFromPath(CString path) 
{ 
    hBitmap= (HBITMAP)::LoadImage(AfxGetInstanceHandle(),path,IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION|LR_LOADFROMFILE);//創(chuàng)建位圖句柄 
} 

//獲取位圖對(duì)象 
void CMovePictureDlg::GetBitMap(HBITMAP hBitmap) 
{ 
   m_BitMap.Attach(hBitmap);//通過(guò)位圖句柄創(chuàng)建位圖對(duì)象 

    //獲取圖像信息 
    BITMAPINFOHEADER bminfo;  
    m_BitMap.GetObject(sizeof(bminfo),&bminfo);  

    //獲取位圖寬高 
    m_nBmpWidth=bminfo.biWidth; 
    m_nBmpHeight=bminfo.biHeight; 
} 

//定時(shí)器事件 
void CMovePictureDlg::OnTimer(UINT nIDEvent)  
{ 
    // TODO: Add your message handler code here and/or call default 

    if(abs(vx)>abs(vy))//當(dāng)水平速度大于垂直速度時(shí)，只改變水平方向增量 
    { 
        if(picRect.left==clientRect.left) 
        { 
            vx=-vx; 
        } 
        if(picRect.left==clientRect.right-m_nBmpWidth) 
        { 
            vx=-vx; 
        } 
        picRect.left+=vx; 
    } 
    else if(abs(vx)<abs(vy))//當(dāng)水平速度小于垂直速度時(shí)，只改變垂直方向增量 
    { 
        if(picRect.top==clientRect.top) 
        { 
            vy=-vy; 
        } 
        if(picRect.top==clientRect.bottom-m_nBmpHeight) 
        { 
            vy=-vy; 
        } 
        picRect.top+=vy; 
    } 

    //邊界判斷 
    if(picRect.left<clientRect.left) 
    { 
        picRect.left=clientRect.left; 
    } 
    if(picRect.left>clientRect.right-m_nBmpWidth) 
    { 
        picRect.left=clientRect.right-m_nBmpWidth; 
    } 
    if(picRect.top<clientRect.top) 
    { 
        picRect.top=clientRect.top; 
    } 
    if(picRect.top>clientRect.bottom-m_nBmpHeight) 
    { 
        picRect.top=clientRect.bottom-m_nBmpHeight; 
    } 

    pictureBox->MoveWindow(picRect.left,picRect.top,m_nBmpWidth,m_nBmpHeight);//改變圖片框大小 

    //增量遞減，勻減速運(yùn)動(dòng) 
    if(vx>0) 
    { 
        vx-=f; 
        if(vx<0) 
        { 
            vx=0; 
        } 
    } 
    else if(vx<0) 
    { 
        vx+=f; 
        if(vx>0) 
        { 
            vx=0; 
        } 
    } 

    if(vy>0) 
    { 
        vy-=f; 
        if(vy<0) 
        { 
            vy=0; 
        } 
    } 
    else if(vy<0) 
    { 
        vy+=f; 
        if(vy>0) 
        { 
            vy=0; 
        } 
    } 

    SetPicRect(picRect.left,picRect.top);//重置圖片位置 

    CDialog::OnTimer(nIDEvent); 
} 

void CMovePictureDlg::OnDestroy()  
{ 
    CDialog::OnDestroy(); 

    // TODO: Add your message handler code here 
    this->KillTimer(1);//銷毀定時(shí)器 
}