怎样在非客户区捕捉鼠标状态?

类别:VC语言 点击:0 评论:0 推荐:

鉴于很多网友苦于在非客户区捕捉鼠标状态,特写出用DirectX来解决的方法.

首先新建一个基于对话框的工程(定为MouseR)

在工程属性的Link-->Object/Library Modules:里加上:

dxguid.lib dxerr8.lib dinput8.lib 

(如果你的机器上安装了DirectX 8.0 SDK,只需要如上操作就行了,

如果没有安装或没有将VC的库指定到SDK里,你需要将这几个库拷贝到你的工程中)

同时,在MouseRDlg.cpp的头部加上:#include <dinput.h>//安装了SDK情况下.

以下为原文件:

/////////////////////////////////////////////////////////////////////////////
// CMouseRDlg dialog

class CMouseRDlg : public CDialog
{
// Construction
public:
 CMouseRDlg(CWnd* pParent = NULL); // standard constructor

//此处定义三个函数 

VOID FreeDirectInput();     //释放
 void ReadImmediateData(); //读取
 void InitDevice();              //初始化


// Dialog Data
 //{{AFX_DATA(CMouseRDlg)
 enum { IDD = IDD_MOUSER_DIALOG };
  // NOTE: the ClassWizard will add data members here
 //}}AFX_DATA

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

// Implementation
protected:
 HICON m_hIcon;

 // Generated message map functions
 //{{AFX_MSG(CMouseRDlg)
 virtual BOOL OnInitDialog();
 afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
 afx_msg void OnPaint();
 afx_msg HCURSOR OnQueryDragIcon();
 afx_msg void OnTimer(UINT nIDEvent);
 afx_msg void OnDestroy();
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

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

#endif // !defined(AFX_MOUSERDLG_H__BC9AFF7C_C2BE_439A_9D50_CDC608606DFA__INCLUDED_)

// MouseRDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MouseR.h"
#include "MouseRDlg.h"


//dirctx
#include <dinput.h>

 


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

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

//定义两个小函数
#define SAFE_DELETE(p)  { if(p) { delete (p);     (p)=NULL; } }
#define SAFE_RELEASE(p) { if(p) { (p)->Release(); (p)=NULL; } }

//#define SAMPLE_BUFFER_SIZE 16  // arbitrary number of buffer elements

 LPDIRECTINPUT8       g_pDI    = NULL;         //定义两个控制变量
 LPDIRECTINPUTDEVICE8 g_pMouse = NULL;

 

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()

/////////////////////////////////////////////////////////////////////////////
// CMouseRDlg dialog

CMouseRDlg::CMouseRDlg(CWnd* pParent /*=NULL*/)
 : CDialog(CMouseRDlg::IDD, pParent)
{
 //{{AFX_DATA_INIT(CMouseRDlg)
  // NOTE: the ClassWizard will add member initialization here
 //}}AFX_DATA_INIT
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMouseRDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CMouseRDlg)
  // NOTE: the ClassWizard will add DDX and DDV calls here
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMouseRDlg, CDialog)
 //{{AFX_MSG_MAP(CMouseRDlg)
 ON_WM_SYSCOMMAND()
 ON_WM_PAINT()
 ON_WM_QUERYDRAGICON()
 ON_WM_TIMER()
 ON_WM_DESTROY()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMouseRDlg message handlers

BOOL CMouseRDlg::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);
  }
 }

 SetIcon(m_hIcon, TRUE);   // Set big icon
 SetIcon(m_hIcon, FALSE);  // Set small icon
 
 // TODO: Add extra initialization here

 InitDevice();
 SetTimer(1,10,0);
 
 return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMouseRDlg::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 CMouseRDlg::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 CMouseRDlg::OnQueryDragIcon()
{
 return (HCURSOR) m_hIcon;
}


void CMouseRDlg::InitDevice()
{
    HRESULT hr;
  
    FreeDirectInput();


    if( FAILED( hr = DirectInput8Create( GetModuleHandle(NULL), DIRECTINPUT_VERSION,
                                         IID_IDirectInput8, (VOID**)&g_pDI, NULL ) ) )
        return ;
   
    // Obtain an interface to the system mouse device.
    if( FAILED( hr = g_pDI->CreateDevice( GUID_SysMouse, &g_pMouse, NULL ) ) )
        return ;
   
  
    if( FAILED( hr = g_pMouse->SetDataFormat( &c_dfDIMouse2 ) ) )
        return ;
  
  
    if( FAILED(hr) )
        return ;
   
    g_pMouse->Acquire();

}

///////////////////read mouse info////////
void CMouseRDlg::ReadImmediateData( )
{
    HRESULT       hr;
    CString       strNewText;
    DIMOUSESTATE2 dims2;      // DirectInput mouse state structure

 CPoint point;


    if( NULL == g_pMouse )
        return ;
   
    ZeroMemory( &dims2, sizeof(dims2) );
    hr = g_pMouse->GetDeviceState( sizeof(DIMOUSESTATE2), &dims2 );
    if( FAILED(hr) )
    {
     
        hr = g_pMouse->Acquire();
        while( hr == DIERR_INPUTLOST )
            hr = g_pMouse->Acquire();

        if( hr == DIERR_OTHERAPPHASPRIO ||
            hr == DIERR_NOTACQUIRED )
            SetDlgItemText(IDC_STATIC1, "失败!" );

       
    }
   
    GetCursorPos(&point);  //得到鼠标位置.这个功能直接用API得到更方便,所以这里取

                                        // 代了DirectX
 
    strNewText.Format("L=%d R=%d M=%d X=%4d Y=%4d",  //写入结果,分别为L左

                                                                                          //键,R右键,M中键,X鼠标X

                                                                                          //值,Y鼠标Y值.前三个值,1

                                                                                          //表示按下,0为弹起
                        
                        (dims2.rgbButtons[0] & 0x80) ? 1 : 0,
                        (dims2.rgbButtons[1] & 0x80) ? 1 : 0,
                        (dims2.rgbButtons[2] & 0x80) ? 1 : 0,
                           point.x,point.y
                          );
 

    CString strOldText;
    GetDlgItemText(IDC_STATIC1, strOldText);
   
    if( 0 != lstrcmp( strOldText, strNewText ) )
        SetDlgItemText( IDC_STATIC1, strNewText ); //显示结果,IDC_STATIC1为用来

                                                                               //显示的文本标签
   
}

VOID CMouseRDlg::FreeDirectInput()         //释放
{
        if( g_pMouse )
        g_pMouse->Unacquire();
    

    SAFE_RELEASE( g_pMouse );
    SAFE_RELEASE( g_pDI );
}


void CMouseRDlg::OnTimer(UINT nIDEvent)
{

 ReadImmediateData( );
 CDialog::OnTimer(nIDEvent);
}


void CMouseRDlg::OnDestroy()
{

 FreeDirectInput();
 KillTimer(1);
 CDialog::OnDestroy();
 
 
}

 

OK了,运行一下程序就可以了,这时你会发再点击屏幕任意一个地方都会有响应了.

 

下载工程代码:

http://www.7forever.com/rwdata/temp/MouseR.rar

作者信箱:

[email protected]

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