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:

Method

Description
void
CDIMouse.SetHWND(HWND)
Set the windows handle to which Direct
Input Will be attached to.  Must be the Parent Window.
void
CDIMouse.SetHWND(CWnd*)
Set the windows handle
for MFC applications to which Direct
Input Will be attached to.  Must be the Parent Window.
int
CDIMouse.GetAxisCount(void)
Returns
the number of Axis the mouse has.
int
CDIMouse.GetButtonCount(void)
Returns
the number of Buttons the mouse has.
bool
CDIMouse.PollDevice(void)
Update
Mouse Data, Must be called Every Time Program Needs Input
bool SetCoOpLevel(bool) Sets
the Co-Operative Level (true=exclusive, false = Non-Exclusive)
int
CDIMouse.GetRelativeX(void)
Returns
the movement on the X-Axis since data was last read. 
int
CDIMouse.GetRelativeY(void)
Returns
the movement on the Y-Axis since data was last read. 
int
CDIMouse.GetRelativeZ(void)
Returns
the movement on the Z-Axis since data was last read. 
bool
CDIMouse.IsMouseLeft(void)
True
if mouse moving Left
bool
CDIMouse.IsMouseRight(void)
True
if mouse moving Right
bool
CDIMouse.IsMouseUp(void)
True
if mouse moving Up
bool
CDIMouse.IsMouseDown(void)
True
if mouse moving Down
bool
CDIMouse.IsMouseWheelUp(void)
True
if mouse wheel moving away from user.
bool
CDIMouse.IsMouseWheelDown(void)
True
if mouse wheel moving Down from user.
bool
CDIMouse.IsButton0(void)
True
if mouse button 0 pressed.
bool
CDIMouse.IsButton1(void)
True
if mouse button 1 pressed.
bool
CDIMouse.IsButton2(void)
True
if mouse button 2 pressed.
bool
CDIMouse.IsButton3(void)
True
if mouse button 3 pressed.
bool
CDIMouse.IsButton4(void)
True
if mouse button 4 pressed.
bool
CDIMouse.IsButton5(void)
True
if mouse button 5 pressed.
bool
CDIMouse.IsButton6(void)
True
if mouse button 6 pressed.
bool
CDIMouse.IsButton7(void)
True
if mouse button 7 pressed.
bool
CDIMouse.IsButtonDown(int button)
True
if button is pressed.
bool
CDIMouse.IsDoubleClicked(int button)
True
if button double clicked.
void
ResetDoubleClick(void) 
Reset
Double Click Status’ i.e. Acknowledge last press.
bool
CDIMouse.Acquire(bool state)
Acquire/Unacquire
the Mouse Device.  You will need to Unacquire the device if you
want Windows to handle Mouse messages or another application is being
switched in.
state=true To Acquire
state=false To UnAcquire

Returns : true=Operation Successful, false=Operation
unsuccessful

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)

Downloads

Download base source project – 4 Kb

Download demo project – 2 Kb

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