从CButton派生一个可检测按下状态和定时重复发送消息的按钮控件

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// PressButton.h : header file//#pragma once/////////////////////////////////////////////////////////////////////////////// CPressButton windowclass CPressButton : public CButton{  // Constructionpublic:  CPressButton();    // Attributespublic:  UINT m_RepeateIntTick; //重复间隔ms =0时不重复  BOOL m_bIsPressedFlag; //按下标记？  // Operationspublic:    // Overrides  // ClassWizard generated virtual function overrides  //{{AFX_VIRTUAL(CPressButton)  //}}AFX_VIRTUAL    // Implementationpublic:  virtual ~CPressButton();    // Generated message map functionsprotected:  //{{AFX_MSG(CPressButton)  afx_msg void OnLButtonUp(UINT nFlags, CPoint point);  afx_msg void OnLButtonDown(UINT nFlags, CPoint point);  afx_msg void OnTimer(UINT nIDEvent);  afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);  afx_msg void OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags);  //}}AFX_MSG    DECLARE_MESSAGE_MAP()    protected:  BOOL m_bTimeStarted; //定时器已启动？    void BeginClickEvent(); //处理按下事件  void EndClickEvent(); //处理抬起事件  void PostClickMsg(); //发送消息};/////////////////////////////////////////////////////////////////////////////

// PressButton.cpp : implementation file#include "stdafx.h"#include "PressButton.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif/////////////////////////////////////////////////////////////////////////////// CPressButtonCPressButton::CPressButton(){  m_bIsPressedFlag = FALSE;  m_bTimeStarted = FALSE;  m_RepeateIntTick = 1000; //重复间隔ms}CPressButton::~CPressButton(){}BEGIN_MESSAGE_MAP(CPressButton, CButton)//{{AFX_MSG_MAP(CPressButton)ON_WM_LBUTTONUP()ON_WM_LBUTTONDOWN()ON_WM_TIMER()ON_WM_KEYDOWN()ON_WM_KEYUP()//}}AFX_MSG_MAPEND_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////// CPressButton message handlersvoid CPressButton::OnLButtonUp(UINT nFlags, CPoint point) {  // TODO: Add your message handler code here and/or call default  EndClickEvent();  CButton::OnLButtonUp(nFlags, point);}void CPressButton::OnLButtonDown(UINT nFlags, CPoint point) {  // TODO: Add your message handler code here and/or call default  BeginClickEvent();    CButton::OnLButtonDown(nFlags, point);}void CPressButton::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) {  // TODO: Add your message handler code here and/or call default  BeginClickEvent();  CButton::OnKeyDown(nChar, nRepCnt, nFlags);}void CPressButton::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) {  // TODO: Add your message handler code here and/or call default  EndClickEvent();  CButton::OnKeyUp(nChar, nRepCnt, nFlags);}void CPressButton::OnTimer(UINT nIDEvent) {  // TODO: Add your message handler code here and/or call default  if(nIDEvent == 1)  {    PostClickMsg();  }    CButton::OnTimer(nIDEvent);}void CPressButton::BeginClickEvent(){  if(!m_bIsPressedFlag)      {    PostClickMsg();    SetCapture();    m_bIsPressedFlag = TRUE;  }    if((!m_bTimeStarted) && m_RepeateIntTick > 0)  {        SetTimer(1, m_RepeateIntTick, NULL);    m_bTimeStarted = TRUE;  }  }void CPressButton::EndClickEvent(){  if(m_bTimeStarted)  {    KillTimer(1);    m_bTimeStarted = FALSE;  }    if(m_bIsPressedFlag)  {        ReleaseCapture();    m_bIsPressedFlag = FALSE;  }}void CPressButton::PostClickMsg(){  GetParent()->PostMessage(WM_COMMAND,     MAKEWPARAM(GetDlgCtrlID(), BN_CLICKED), (LPARAM)m_hWnd);}

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