2 flx413 flx413 于 2016.02.23 17:21 提问

Windows编程如何监听鼠标是否被一直按下
 //这个函数用来处理 鼠标和键盘的事件
    void OnWindowMessage( HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam ) {
        switch (message)
        {
        case WM_LBUTTONDOWN:
            MessageBox(NULL, "检测到鼠标事件", "这个是标题", 0);
            bIsMouseDown = true;
            break;
        case WM_LBUTTONUP:
            bIsMouseDown = false;
            break;
        case WM_KEYDOWN:
            break;
        }
    }

我想按下鼠标左键不松开一直弹出MessageBox,松开左键不再弹出。上面代码的效果是点击左键不松开只弹出一次对话框。这个该怎么实现呢?

5个回答

u010551319
u010551319   2016.02.23 17:42

void OnWindowMessage( HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam ) {
switch (message)
{
case WM_LBUTTONDOWN:
bIsMouseDown = true;
whilebIsMouseDown bLBTNDown)
{
MessageBox(NULL, "检测到鼠标事件", "这个是标题", 0);
}
break;
case WM_LBUTTONUP:
bIsMouseDown = false;
break;
case WM_KEYDOWN:
break;
}
}

u010551319
u010551319   2016.02.23 17:45
  1. void OnWindowMessage( HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam ) { switch (message) { case WM_LBUTTONDOWN: bIsMouseDown = true; while(bIsMouseDown) { MessageBox(NULL, "检测到鼠标事件", "这个是标题", 0); } break; case WM_LBUTTONUP: bIsMouseDown = false; break; case WM_KEYDOWN: break; } }
u010551319
u010551319   2016.02.23 17:44
  1. void OnWindowMessage( HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam ) { switch (message) { case WM_LBUTTONDOWN: bIsMouseDown = true; while(bIsMouseDown) { MessageBox(NULL, "检测到鼠标事件", "这个是标题", 0); } break; case WM_LBUTTONUP: bIsMouseDown = false; break; case WM_KEYDOWN: break; } }
u010551319
u010551319 回复flx413: 留个邮箱,给你测试demo
接近 2 年之前 回复
flx413
flx413 这个不行呀
接近 2 年之前 回复
u010551319
u010551319   2016.02.23 22:55

// LeftButtonDownDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "LeftButtonDown.h"
#include "LeftButtonDownDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

static BOOL bIsMouseDown = FALSE;
HWND m_hWnd;
HHOOK hhookMs = NULL;//钩子句柄
LRESULT CALLBACK LowLevelMouseProc (INT nCode, WPARAM wParam, LPARAM lParam);//钩子回调函数

BOOL UninstallKbHook();//注销钩子
BOOL InstallKbHook();//注册钩子

// 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()

// CLeftButtonDownDlg 对话框

CLeftButtonDownDlg::CLeftButtonDownDlg(CWnd* pParent /*=NULL*/)
: CDialog(CLeftButtonDownDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
InstallKbHook( );
}

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

BEGIN_MESSAGE_MAP(CLeftButtonDownDlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
// ON_WM_LBUTTONUP()
END_MESSAGE_MAP()

// CLeftButtonDownDlg 消息处理程序

BOOL CLeftButtonDownDlg::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)
{
    BOOL bNameValid;
    CString strAboutMenu;
    bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
    ASSERT(bNameValid);
    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;  // 除非将焦点设置到控件,否则返回 TRUE

}

void CLeftButtonDownDlg::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 CLeftButtonDownDlg::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);

    // 使图标在工作区矩形中居中
    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 CLeftButtonDownDlg::OnQueryDragIcon()
{
return static_cast(m_hIcon);
}

LRESULT CALLBACK LowLevelMouseProc (INT nCode, WPARAM wParam, LPARAM lParam)

{

MSLLHOOKSTRUCT *pkbhs = (MSLLHOOKSTRUCT *)lParam;

char strMsg[100] = {0};

switch (nCode)

{

case HC_ACTION:

{

if((wParam == WM_LBUTTONUP))

{

bIsMouseDown = FALSE;
}

}

default:

break;

}

return CallNextHookEx (NULL, nCode, wParam, lParam);

}

BOOL InstallKbHook( )

{

if (hhookMs )

UninstallKbHook();

hhookMs = SetWindowsHookEx(WH_MOUSE_LL,

(HOOKPROC)LowLevelMouseProc, AfxGetApp()->m_hInstance, NULL);

return(hhookMs != NULL);

}

BOOL UninstallKbHook()

{

BOOL fOk = FALSE;

if (hhookMs ) {

fOk = UnhookWindowsHookEx(hhookMs );

hhookMs = NULL;

}

return(fOk);

}

UINT PostMessagBox(LPVOID lpData)
{
HWND tmp = (HWND)lpData;
while(bIsMouseDown)
{
PostMessage(tmp, 0x1234, 0, 0);
Sleep(1000);
}
return 0;
}
static int i = 0;
LRESULT CLeftButtonDownDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
// TODO: 在此添加专用代码和/或调用基类
switch (message)
{
case WM_LBUTTONDOWN:
bIsMouseDown = TRUE;
m_hWnd = GetSafeHwnd();
AfxBeginThread(PostMessagBox, m_hWnd);
break;
case 0x1234:
CString csInfo;
i++;
csInfo.Format("i = %d", i);
MessageBox(csInfo);
return TRUE;
}
return CDialog::WindowProc(message, wParam, lParam);
}

lx624909677
lx624909677   Ds   Rxr 2016.03.30 19:16

可以使用HOOK来监听。

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