Re: Hooking Joystick Messages?

Hi Peter,

the old device from Win3.11 is already exists they name is MCI ,u find
here mixer/video/cd functions that layer twain and VFW(VideoForWindows)
ist currently actual exists in Vindows Vista:-)

w95 like DirectX that is the Interface u have should to use, here is a
minimal
pseudociode to pull ur Stick:

make a class and declare enumerator callback statical:

static int __stdcall CDirectX::EnumDevicesProc(const DIDEVICEINSTANCE*
pdidInstance, VOID* pContext);

best regards
 Karsten Schulz
(www.kahnsoft.de)

#include "dinput.h"

 LPDIRECTINPUT8 g_pdi;
 LPDIRECTINPUTDEVICE8 g_pJoy;

 g_pdd = 0;
 g_pdi = 0;
 g_pJoy = 0;
  memset(&g_pJoy,0,sizeof(g_pJoy));

void CDirectX::Delete()
{
  if(g_pJoy)
    g_pJoy->Release(),g_pJoy=0;

  if(g_pdi)
   g_pdi->Release(),g_pdi=0;
}

bool CDirectX::Create(HWND hwnd)
{
   if(!hwnd)
     return false;

   m_hWnd = hwnd;

    hr = DirectDrawCreate(NULL,&g_pdd,NULL);
    if(hr != DI_OK)
     return false;

    hr = g_pdd->SetCooperativeLevel(m_hWnd, DDSCL_SETFOCUSWINDOW);
    if(hr != DI_OK)
      return false;

    hr = DirectInput8Create(GetModuleHandle(NULL), DIRECTINPUT_VERSION,
  IID_IDirectInput8, (void **)&g_pdi,NULL);
 if(hr != DI_OK) {AfxMessageBox("DIinput8 create failed");return false;}

 // Look for a simple joystick we can use for this sample program.
 if( FAILED( hr = g_pdi->EnumDevices( DI8DEVCLASS_GAMECTRL,
  EnumDevicesProc,
  this, DIEDFL_ATTACHEDONLY ) ) )
  return hr;

 return (g_pJoy)?S_OK:E_FAIL;
}

//u should poll it frequently
bool CDirectX::GetJoy(int &x, int &y,BYTE &button)
{
   DIJOYSTATE dimsm;
   bool stat=true;

   x=y=button=0;

   if(g_pJoy)
   {
    if( FAILED(g_pJoy->Poll()) )
     while( g_pJoy->Acquire() == DIERR_INPUTLOST ) g_pJoy->Acquire();

  if( (DI_OK == g_pJoy->GetDeviceState(sizeof(DIJOYSTATE),&dimsm)) )
  {
   button =
((dimsm.rgbButtons[2]?1:0)<<2)|((dimsm.rgbButtons[1]?1:0)<<1)|((dimsm.rgbButtons[0]?1:0)<<0);

         y=(int)-(dimsm.lY/100.0f),x=(int)(dimsm.lX/100.0f);

  }else stat=false;
   }

 return stat;
}

//is static
int __stdcall CDirectX::EnumDevicesProc(const DIDEVICEINSTANCE* lpddi,VOID*
pContext)
{
    CDirectX *app = (CDirectX *)pContext;

    HRESULT hr;

    hr = app->g_pdi->CreateDevice(lpddi->guidInstance, &app->g_pJoy, NULL);
    if(hr != DI_OK) {AfxMessageBox("DIjoy createDev failed");return
DIENUM_CONTINUE;}

    if(!app->g_pJoy)
     return DIENUM_CONTINUE;

    hr = app->g_pJoy->QueryInterface(IID_IDirectInputDevice8,( void
** )&app->g_pJoy);
    if(! SUCCEEDED(hr) )
    {
     AfxMessageBox("No IID_IDirectInputDevice8");
     app->g_pJoy->Release();
     return DIENUM_CONTINUE;
    }

    app->g_pJoy->Release();

    app->g_pJoy = app->g_pJoy;

    hr = app->g_pJoy->SetDataFormat(&c_dfDIJoystick);
    if(hr != DI_OK)
    {
     AfxMessageBox("DIjoy SetForm failed");
     app->g_pJoy->Release();
     return DIENUM_CONTINUE;
    }

    hr = app->g_pJoy->SetCooperativeLevel(0/*m_hWnd*/, DISCL_NONEXCLUSIVE |
DISCL_BACKGROUND);//DISCL_BACKGROUND | DISCL_NONEXCLUSIVE );
    if(hr != DI_OK)
    {
     AfxMessageBox("DIjoy cooper failed");
     app->g_pJoy->Release();
     return DIENUM_CONTINUE;
    }

    DIPROPRANGE diprg;
      // set X-axis range to (-1000 ... +1000)
    // This lets us test against 0 to see which way the stick is pointed.

    diprg.diph.dwSize = sizeof(diprg);
    diprg.diph.dwHeaderSize = sizeof(diprg.diph);
    diprg.diph.dwObj = DIJOFS_X;
    diprg.diph.dwHow = DIPH_BYOFFSET;
    diprg.lMin = JOYMIN;
    diprg.lMax = JOYMAX;

    if(app->g_pJoy->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK)
    {
       AfxMessageBox("DIjoy Property1 failed");
       app->g_pJoy->Release();
       return DIENUM_CONTINUE;
    }

    // And again for Y-axis range
    //
    diprg.diph.dwObj = DIJOFS_Y;

    if(app->g_pJoy->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK)
    {
       AfxMessageBox("DIjoy Property2 failed");
       app->g_pJoy->Release();
       return false;
    }

    // Set deadzone.
    DIPROPDWORD dipdw;
    dipdw.diph.dwSize = sizeof( dipdw );
    dipdw.diph.dwHeaderSize = sizeof( dipdw.diph );
    dipdw.diph.dwObj = 0;
    dipdw.diph.dwHow = DIPH_DEVICE;
    dipdw.dwData = JOYDEAD;

    if ( FAILED( app->g_pJoy->SetProperty( DIPROP_DEADZONE,
&dipdw.diph ) ) )
        return FALSE;

    // Set saturation.
    dipdw.dwData = JOYSAT;
    if ( FAILED( app->g_pJoy->SetProperty( DIPROP_SATURATION,
&dipdw.diph ) ) )
        return FALSE;

    if(!app->g_pJoy)
    {
  AfxMessageBox("DIjoy NO PTR failed");
     app->g_pJoy->Release();
     return false;
    }

    return DIENUM_STOP;
}

"Peter Olcott" <NoSpam@SeeScreen.com> schrieb im Newsbeitrag
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