void MoveLookController::OnPointerPressed()

in SharedContent/cpp/GameContent/MoveLookController.cpp [179:313]

• 122 lines of code
• 34 McCabe index (conditional complexity)

void MoveLookController::OnPointerPressed(
    _In_ CoreWindow^ /* sender */,
    _In_ PointerEventArgs^ args
    )
{
    PointerPoint^ point = args->CurrentPoint;
    uint32 pointerID = point->PointerId;
    Point pointerPosition = point->Position;
    PointerPointProperties^ pointProperties = point->Properties;
    auto pointerDevice = point->PointerDevice;
    auto pointerDeviceType = pointerDevice->PointerDeviceType;

    XMFLOAT2 position = XMFLOAT2(pointerPosition.X, pointerPosition.Y);

#ifdef MOVELOOKCONTROLLER_TRACE
    DebugTrace(L"%-7s (%d) at (%4.0f, %4.0f)", L"Pressed", pointerID, position.x, position.y);
#endif

    switch (m_state)
    {
    case MoveLookControllerState::WaitForInput:
        if (position.x > m_buttonUpperLeft.x &&
            position.x < m_buttonLowerRight.x &&
            position.y > m_buttonUpperLeft.y &&
            position.y < m_buttonLowerRight.y)
        {
            // Wait until button released before setting variable.
            m_buttonPointerID = pointerID;
            m_buttonInUse = true;
#ifdef MOVELOOKCONTROLLER_TRACE
            DebugTrace(L"\tWaitForInput(%d) - BUTTON in USE", pointerID);
#endif
        }
        break;

    case MoveLookControllerState::Active:
        switch (pointerDeviceType)
        {
        case Windows::Devices::Input::PointerDeviceType::Touch:
            if (position.x > m_moveUpperLeft.x &&
                position.x < m_moveLowerRight.x &&
                position.y > m_moveUpperLeft.y &&
                position.y < m_moveLowerRight.y)
            {
                // This pointer is in the move control.
                if (!m_moveInUse)
                {
                    // There is not an active pointer in this control yet.
                    // Process a DPad touch down event.
                    m_moveFirstDown = position;                 // Save location of initial contact.
                    m_movePointerID = pointerID;                // Store the pointer using this control.
                    m_moveInUse = true;
                }
            }
            else if (position.x > m_fireUpperLeft.x &&
                position.x < m_fireLowerRight.x &&
                position.y > m_fireUpperLeft.y &&
                position.y < m_fireLowerRight.y)
            {
                // This pointer is in the fire control.
                if (!m_fireInUse)
                {
                    m_fireLastPoint = position;
                    m_firePointerID = pointerID;
                    m_fireInUse = true;
                    if (!m_autoFire)
                    {
                        m_firePressed = true;
                    }
                }
            }
            else
            {
                if (!m_lookInUse)
                {
                    // There is not an active pointer in this control yet.
                    m_lookLastPoint = position;                   // Save point for later move.
                    m_lookPointerID = pointerID;                  // Store the pointer using this control.
                    m_lookLastDelta.x = m_lookLastDelta.y = 0;    // These are for smoothing.
                    m_lookInUse = true;
                }
            }
            break;

        default:
            bool rightButton = pointProperties->IsRightButtonPressed;
            bool leftButton = pointProperties->IsLeftButtonPressed;

            if (!m_autoFire && (!m_mouseLeftInUse && leftButton))
            {
                m_firePressed = true;
            }

            if (!m_mouseInUse)
            {
                m_mouseInUse = true;
                m_mouseLastPoint = position;
                m_mousePointerID = pointerID;
                m_mouseLeftInUse = leftButton;
                m_mouseRightInUse = rightButton;
                m_lookLastDelta.x = m_lookLastDelta.y = 0;          // These are for smoothing.
            }
            else
            {
#ifdef MOVELOOKCONTROLLER_TRACE
                DebugTrace(L"\tWARNING: OnPointerPressed()  Mouse aleady in use (%d-%s%s) and new event id: %d %s%s",
                    m_mousePointerID,
                    m_mouseLeftInUse ? "L" : "",
                    m_mouseRightInUse ? "R" : "",
                    pointerID,
                    leftButton ? "L" : "",
                    rightButton ? "R" : ""
                    );
#endif
            }
            break;
        }
#ifdef MOVELOOKCONTROLLER_TRACE
        DebugTrace(
            L"\t%s%s%s %s%s%s",
            m_moveInUse ? L"Move " : L"",
            m_lookInUse ? L"Look " : L"",
            m_fireInUse ? L"Fire " : L"",
            m_mouseInUse ? L"Mouse:" : L"",
            m_mouseLeftInUse ? L"L" : L"-",
            m_mouseRightInUse ? L"R" : L"-"
            );
#endif
        break;
    }
#ifdef MOVELOOKCONTROLLER_TRACE
    DebugTrace(L"\n");
#endif
    return;
}