Thread: Static class?

I'm currently working on mouse support for my tile engine and I've run into problems. The DirectInput object is one interface - created one time. The Mouse interface is as well but I'm deriving it from DirectInput. Problem is that when I create the mouse, keyboard, etc - I do not want to create another instance of DirectInput.

If I declare DXInput as static, will this work?
It seems that MSVC does not like that, but I thought this was possible with classes?


Here is my setup:

DXInput.h

Code:

#ifndef _DXINPUT_
#define _DXINPUT_

#define DIRECTINPUT_VERSION 0x0700
#include "dinput.h"

class DXInput
{
  protected:
    LPDIRECTINPUT lpdi;
  public:
    DXInput(HINSTANCE instance);
    ~DXInput(void) {if (lpdi) lpdi->Release();};
};

#endif

DXInput.cpp

Code:

#include "DXInput.h"

DXInput::DXInput(HINSTANCE instance)
{
	
  if (FAILED(DirectInputCreate(instance,DIRECTINPUT_VERSION,&lpdi,NULL)))
  {
    //error
  }
}

DXMouse.h

Code:

#ifndef _DXMOUSE_
#define _DXMOUSE_

#include "DXInput.h"

#define RMB 0
#define LMB 1
#define MMB 2

class DXMouse:public DXInput
{
  LPDIRECTINPUTDEVICE lpdiMouse;
  DIMOUSESTATE MouseState;
  public:
    DXMouse(void) {};
    ~DXMouse(void) 
    {
        if (lpdiMouse) lpdiMouse->Unacquire();
        if (lpdiMouse) lpdiMouse->Release();
    }
    void Query(void) {if (FAILED(lpdiMouse->GetDeviceState(sizeof(DIMOUSESTATE),(LPVOID)MouseState))) };
    int CheckButton(int ButtonToCheck);
    void Show(void);
    void Hide(void);
    DIMOUSESTATE GetMouseState(void) {return MouseState;};
};
#endif

DXMouse.cpp

Code:

#include "DXInput.h"
#include "DXMouse.h"

DXMouse::DXMouse(void)
{
    if (FAILED(lpdi->CreateDevice(GUID_SysMouse,&lpdiMouse,NULL))
   {
     //error
   }
   if (FAILED(lpdiMouse->SetCooperativeLevel(MainWindow,DISCL_BACKGROUND | DISCL_NONEXCLUSIVE)))
  {
    //error
  }
  if (FAILED(lpdiMouse->SetDataFormat(&c_dfDIMOUSE)))
  {
    //error
  }
  if (FAILED(lpdiMouse->Acquire()))
  {
    //error
  }
}

int DXMouse::CheckButton(int ButtonToCheck)
{
  Query();
  if (MouseState.rgbButtons[ButtonToCheck] & 0x80)
  {
     return TRUE;
  } else return FALSE;
}

Any help would be appreciated. I really want the mouse to be accessible by everyone in the engine. Having to go through a bunch of inheritance crapola when the mouse is a pretty global object seems kinda dumb.

Right now the compiler is yelling at me about a default constructor for DXInput when I attempt to create the mouse - I understand why it's doing this, but I'm not sure about the best route to go in getting around it.

And hey, look, all that and no assembly at all.