Direct Input 7 Mouse Class

Environment: Windows 9x, Windows 2000; Visual C++ 6 (SP4), DirectX 7 Installed

Introduction.

DirectInput is essential for responsive games, therefore to help ease the transition of DOS games programmers, you can use this class to read mouse input directly.  

To use the class, define a global variable :-

CDIMouse myMouse;

You will have to supply the HWND for the parent window under which you wish to take Keyboard Control.

The class has the following public methods:

Before obtaining mouse state information you will need to set the HWND of the parent window of your application.  You can do this by calling CDIMouse.SetHWND(g_hwnd) for Win32 Applications and CDIMouse.SetHWND(this) for MFC applications.  

Always use PollDevice method before checking the Mouse state information.

The following code snippet can be used to show the mouse status

BOOL CMouseTestDlg::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

 myMouse.SetHWND(this);
 myMouse.Acquire(true);
 SetTimer(1,50,NULL);

 // TODO: Add extra initialization here

 // return TRUE  unless you set the focus to a control
 return TRUE;  
}

void CMouseTestDlg::OnTimer(UINT nIDEvent)
{
 // TODO: Add your message handler code here
 // and/or call default
 if(m_AppActive)
 {
  myMouse.PollDevice();
  m_MouseX.Format("%d",myMouse.GetRelativeX());
  m_MouseY.Format("%d",myMouse.GetRelativeY());
  m_MouseZ.Format("%d",myMouse.GetRelativeZ());

  char buff[80]={"01234567"};
  buff[0]=myMouse.IsButton0()?'0':' ';
  buff[1]=myMouse.IsButton1()?'1':' ';
  buff[2]=myMouse.IsButton2()?'2':' ';
  buff[3]=myMouse.IsButton3()?'3':' ';
  buff[4]=myMouse.IsButton4()?'4':' ';
  buff[5]=myMouse.IsButton5()?'5':' ';
  buff[6]=myMouse.IsButton6()?'6':' ';
  buff[7]=myMouse.IsButton7()?'7':' ';

  if(myMouse.IsMouseLeft())m_Left="X";else m_Left=" ";
  if(myMouse.IsMouseRight())m_Right="X";else m_Right=" ";
  if(myMouse.IsMouseUp())m_Up="X";else m_Up=" ";
  if(myMouse.IsMouseDown())m_Down="X";else m_Down=" ";

  m_Pressed2.Empty();
  CString temp;
  for(int i=0;i<8;i++)
  {
   if(myMouse.IsDoubleClicked(i))m_Pressed2+=i+0x30;
  }

  m_Pressed=buff;

  UpdateData(FALSE);
 }	
 CDialog::OnTimer(nIDEvent);
}

#pragma warning(disable : 4800)
LRESULT CMouseTestDlg::DefWindowProc(UINT message, 
                                     WPARAM wParam, 
                                     LPARAM lParam) 
{
 // TODO: Add your message handler code here
 // and/or call default
 switch(message)
 {
  case WM_ACTIVATEAPP: myMouse.Acquire((bool)wParam);
  m_AppActive=wParam;
  break;
 }

 return CDialog::DefWindowProc(message, wParam, lParam);
}

#pragma warning(error : 4800)

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