hid.cpp

Wxpython Implemented on Windows CE, Source code

// ----------------------------------------------------------------------------
// wxHIDDevice::HasElement
//
// Returns true if the element in the internal cookie array exists
// ----------------------------------------------------------------------------
bool wxHIDDevice::HasElement(int nIndex)
{
    return m_pCookies[nIndex] != NULL;
}

// ----------------------------------------------------------------------------
// wxHIDDevice Destructor
//
// Frees all memory and objects from the structure
// ----------------------------------------------------------------------------
wxHIDDevice::~wxHIDDevice()
{
    if (m_ppDevice != NULL)
    {
        if (m_ppQueue != NULL)
        {
            (*m_ppQueue)->stop(m_ppQueue);
            (*m_ppQueue)->dispose(m_ppQueue);
            (*m_ppQueue)->Release(m_ppQueue);
        }
        (*m_ppDevice)->close(m_ppDevice);
        (*m_ppDevice)->Release(m_ppDevice);
        mach_port_deallocate(mach_task_self(), m_pPort);
    }

    if (m_pCookies != NULL)
    {
        delete [] m_pCookies;
    }
}

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// wxHIDKeyboard
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

//There are no right shift, alt etc. in the wx headers yet so just sort
//of "define our own" for now
enum
{
    WXK_RSHIFT = 400,
    WXK_RALT,
    WXK_RCONTROL,
    WXK_RMENU
};

// ----------------------------------------------------------------------------
// wxHIDKeyboard::GetCount [static]
//
// Get number of HID keyboards available
// ----------------------------------------------------------------------------
int wxHIDKeyboard::GetCount()
{
    return wxHIDDevice::GetCount(kHIDPage_GenericDesktop,
                               kHIDUsage_GD_Keyboard);
}

// ----------------------------------------------------------------------------
// wxHIDKeyboard::Create
//
// Create the HID Keyboard
// ----------------------------------------------------------------------------
bool wxHIDKeyboard::Create(int nDev /* = 1*/)
{
    return wxHIDDevice::Create(kHIDPage_GenericDesktop,
                               kHIDUsage_GD_Keyboard,
                               nDev);
}

// ----------------------------------------------------------------------------
// wxHIDKeyboard::AddCookie
//
// Overloaded version of wxHIDDevice::AddCookie that simply does not
// add a cookie if a duplicate is found
// ----------------------------------------------------------------------------
void wxHIDKeyboard::AddCookie(CFTypeRef Data, int i)
{
    if(!HasElement(i))
        wxHIDDevice::AddCookie(Data, i);
}

// ----------------------------------------------------------------------------
// wxHIDKeyboard::BuildCookies
//
// Callback from Create() to build the HID cookies for the internal cookie
// array
// ----------------------------------------------------------------------------
void wxHIDKeyboard::BuildCookies(CFArrayRef Array)
{
    //Create internal cookie array
    InitCookies(500);

    //Begin recursing in array
    DoBuildCookies(Array);
}

void wxHIDKeyboard::DoBuildCookies(CFArrayRef Array)
{
    //Now go through each possible cookie
    int i,
        nUsage;
//    bool bEOTriggered = false;
    for (i = 0; i < CFArrayGetCount(Array); ++i)
    {
        const void* ref = CFDictionaryGetValue(
                (CFDictionaryRef)CFArrayGetValueAtIndex(Array, i),
                CFSTR(kIOHIDElementKey)
                                              );

        if (ref != NULL)
        {
            DoBuildCookies((CFArrayRef) ref);
        }
        else
    {

            //
            // Get the usage #
            //
        CFNumberGetValue(
                (CFNumberRef)
                    CFDictionaryGetValue((CFDictionaryRef)
                        CFArrayGetValueAtIndex(Array, i),
                        CFSTR(kIOHIDElementUsageKey)
                                        ),
                              kCFNumberLongType,
                              &nUsage);

            //
            // Now translate the usage # into a wx keycode
            //

        //
        // OK, this is strange - basically this kind of strange -
        // Starting from 0xEO these elements (like shift) appear twice in
        // the array!  The ones at the end are bogus I guess - the funny part
        // is that besides the fact that the ones at the front have a Unit
        // and UnitExponent key with a value of 0 and a different cookie value,
        // there is no discernable difference between the two...
        //
        // Will the real shift please stand up?
        //
        // Something to spend a support request on, if I had one, LOL.
        //
        //if(nUsage == 0xE0)
        //{
        //    if(bEOTriggered)
        //       break;
        //    bEOTriggered = true;
        //}
        //Instead of that though we now just don't add duplicate keys

        if (nUsage >= kHIDUsage_KeyboardA && nUsage <= kHIDUsage_KeyboardZ)
            AddCookie(CFArrayGetValueAtIndex(Array, i), 'A' + (nUsage - kHIDUsage_KeyboardA) );
        else if (nUsage >= kHIDUsage_Keyboard1 && nUsage <= kHIDUsage_Keyboard9)
            AddCookie(CFArrayGetValueAtIndex(Array, i), '1' + (nUsage - kHIDUsage_Keyboard1) );
        else if (nUsage >= kHIDUsage_KeyboardF1 && nUsage <= kHIDUsage_KeyboardF12)
            AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_F1 + (nUsage - kHIDUsage_KeyboardF1) );
        else if (nUsage >= kHIDUsage_KeyboardF13 && nUsage <= kHIDUsage_KeyboardF24)
            AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_F13 + (nUsage - kHIDUsage_KeyboardF13) );
        else if (nUsage >= kHIDUsage_Keypad1 && nUsage <= kHIDUsage_Keypad9)
            AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_NUMPAD1 + (nUsage - kHIDUsage_Keypad1) );
        else switch (nUsage)
        {
            //0's (wx & ascii go 0-9, but HID goes 1-0)
            case kHIDUsage_Keyboard0:
                AddCookie(CFArrayGetValueAtIndex(Array, i), '0');
                break;
            case kHIDUsage_Keypad0:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_NUMPAD0);
                break;

            //Basic
            case kHIDUsage_KeyboardReturnOrEnter:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_RETURN);
                break;
            case kHIDUsage_KeyboardEscape:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_ESCAPE);
                break;
            case kHIDUsage_KeyboardDeleteOrBackspace:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_BACK);
                break;
            case kHIDUsage_KeyboardTab:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_TAB);
                break;
            case kHIDUsage_KeyboardSpacebar:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_SPACE);
                break;
            case kHIDUsage_KeyboardPageUp:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_PAGEUP);
                break;
            case kHIDUsage_KeyboardEnd:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_END);
                break;
            case kHIDUsage_KeyboardPageDown:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_PAGEDOWN);
                break;
            case kHIDUsage_KeyboardRightArrow:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_RIGHT);
                break;
            case kHIDUsage_KeyboardLeftArrow:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_LEFT);
                break;
            case kHIDUsage_KeyboardDownArrow:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_DOWN);
                break;
            case kHIDUsage_KeyboardUpArrow:
                AddCookie(CFArrayGetValueAtIndex(Array, i), WXK_UP);
                break;

            //LEDS
            case kHIDUsage_KeyboardCapsLock:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_CAPITAL);
                break;
            case kHIDUsage_KeypadNumLock:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_NUMLOCK);
                break;
            case kHIDUsage_KeyboardScrollLock:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_SCROLL);
                break;

            //Menu keys, Shift, other specials
            case kHIDUsage_KeyboardLeftControl:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_CONTROL);
                break;
            case kHIDUsage_KeyboardLeftShift:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_SHIFT);
                break;
            case kHIDUsage_KeyboardLeftAlt:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_ALT);
                break;
            case kHIDUsage_KeyboardLeftGUI:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_MENU);
                break;
            case kHIDUsage_KeyboardRightControl:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_RCONTROL);
                break;
            case kHIDUsage_KeyboardRightShift:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_RSHIFT);
                break;
            case kHIDUsage_KeyboardRightAlt:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_RALT);
                break;
            case kHIDUsage_KeyboardRightGUI:
                AddCookie(CFArrayGetValueAtIndex(Array, i),WXK_RMENU);
                break;

            //Default
            default:
            //not in wx keycodes - do nothing....
            break;
            } //end mightly long switch
        } //end if the current element is not an array...
    } //end for loop for Array
}//end buildcookies

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// wxHIDModule
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class wxHIDModule : public wxModule
{
    DECLARE_DYNAMIC_CLASS(wxHIDModule)

    public:
        static wxArrayPtrVoid sm_keyboards;
        virtual bool OnInit()
        {
            return true;
        }
        virtual void OnExit()
        {
            for(size_t i = 0; i < sm_keyboards.GetCount(); ++i)
                delete (wxHIDKeyboard*) sm_keyboards[i];
        }
};

IMPLEMENT_DYNAMIC_CLASS(wxHIDModule, wxModule)

wxArrayPtrVoid wxHIDModule::sm_keyboards;

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// wxGetKeyState()
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

bool wxGetKeyState (wxKeyCode key)
{
    wxASSERT_MSG(key != WXK_LBUTTON && key != WXK_RBUTTON && key !=
        WXK_MBUTTON, wxT("can't use wxGetKeyState() for mouse buttons"));

    if (wxHIDModule::sm_keyboards.GetCount() == 0)
    {
        int nKeyboards = wxHIDKeyboard::GetCount();

        for(int i = 1; i <= nKeyboards; ++i)
        {
            wxHIDKeyboard* keyboard = new wxHIDKeyboard();
            if(keyboard->Create(i))
            {
                wxHIDModule::sm_keyboards.Add(keyboard);
            }
            else
            {
                delete keyboard;
                break;
            }
        }

        wxASSERT_MSG(wxHIDModule::sm_keyboards.GetCount() != 0,
                     wxT("No keyboards found!"));
    }

    for(size_t i = 0; i < wxHIDModule::sm_keyboards.GetCount(); ++i)
    {
        wxHIDKeyboard* keyboard = (wxHIDKeyboard*)
                                wxHIDModule::sm_keyboards[i];

    switch(key)
    {
    case WXK_SHIFT:
            if( keyboard->IsActive(WXK_SHIFT) ||
                   keyboard->IsActive(WXK_RSHIFT) )
            {
                return true;
            }
        break;
    case WXK_ALT:
            if( keyboard->IsActive(WXK_ALT) ||
                   keyboard->IsActive(WXK_RALT) )
            {
                return true;
            }
        break;
    case WXK_CONTROL:
            if( keyboard->IsActive(WXK_CONTROL) ||
                   keyboard->IsActive(WXK_RCONTROL) )
            {
                return true;
            }
        break;
    case WXK_MENU:
            if( keyboard->IsActive(WXK_MENU) ||
                   keyboard->IsActive(WXK_RMENU) )
            {
                return true;
            }
        break;
    default:
            if( keyboard->IsActive(key) )
            {
                return true;
            }
        break;
    }
    }

    return false; //not down/error
}

#endif //__DARWIN__