axmol/core/base/CCController.h

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#ifndef __cocos2d_libs__CCController__
#define __cocos2d_libs__CCController__
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_IOS || \
     CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX ||   \
     CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)

#    include "platform/CCPlatformMacros.h"
#    include <string>
#    include <vector>
#    include <unordered_map>

NS_CC_BEGIN

class ControllerImpl;
class EventListenerController;
class EventController;
class EventDispatcher;

/**
 * @addtogroup base
 * @{
 */

/**
 * @class Controller
 * @brief A Controller object represents a connected physical game controller.
 * @js NA
 */
class CC_DLL Controller
{
public:
    /**
     * Controllers' standard  key
     * Controller receives only standard key which contained within enum Key by default.
     */
    enum Key
    {
        KEY_NONE = 0,

        JOYSTICK_LEFT_X = 1000,
        JOYSTICK_LEFT_Y,
        JOYSTICK_RIGHT_X,
        JOYSTICK_RIGHT_Y,

        BUTTON_A,
        BUTTON_B,
        BUTTON_C,
        BUTTON_X,
        BUTTON_Y,
        BUTTON_Z,

        BUTTON_DPAD_UP,
        BUTTON_DPAD_DOWN,
        BUTTON_DPAD_LEFT,
        BUTTON_DPAD_RIGHT,
        BUTTON_DPAD_CENTER,

        BUTTON_LEFT_SHOULDER,
        BUTTON_RIGHT_SHOULDER,

        AXIS_LEFT_TRIGGER,
        AXIS_RIGHT_TRIGGER,

        BUTTON_LEFT_THUMBSTICK,
        BUTTON_RIGHT_THUMBSTICK,

        BUTTON_START,
        BUTTON_SELECT,

        BUTTON_PAUSE,
        KEY_MAX
    };

    /**
     * @struct KeyStatus
     *
     */
    typedef struct _keyStatus
    {
        /** A Boolean value that indicates whether the key is considered pressed. */
        bool isPressed;
        /** The value of key.This value is used in conjunction with the isPressed parameter. */
        float value;
        /** A Boolean value that indicates whether the value of key is analog.
         * If isAnalog is true, the key value might be a float from -1 to 1.
         * If isAnalog is false, the key value would be contain one number: 0 or 1.
         */
        bool isAnalog;
    } KeyStatus;

    static const int TAG_UNSET = -1;

    /**
     * Gets all Controller objects.
     */
    static const std::vector<Controller*>& getAllController() { return s_allController; }

    /**
     * Gets a Controller object with tag.
     *
     * @param tag   An identifier to find the controller.
     * @return A Controller object.
     */
    static Controller* getControllerByTag(int tag);

    /**
     * Gets a Controller object with device ID.
     *
     * @param deviceId   A unique identifier to find the controller.
     * @return A Controller object.
     */
    static Controller* getControllerByDeviceId(int deviceId);

    /**
     * Start discovering new controllers.
     *
     * @warning The API has an empty implementation on Android.
     */
    static void startDiscoveryController();

    /**
     * Stop the discovery process.
     *
     * @warning The API has an empty implementation on Android.
     */
    static void stopDiscoveryController();

    /**
     * Gets the name of this Controller object.
     */
    std::string_view getDeviceName() const { return _deviceName; }

    /**
     * Gets the Controller id.
     */
    int getDeviceId() const { return _deviceId; }

    /**
     * Indicates whether the Controller is connected.
     */
    bool isConnected() const;

    /**
     *
     */
    const KeyStatus& getKeyStatus(int keyCode);

    /**
     * Activate receives key event from external key. e.g. back,menu.
     * Controller receives only standard key which contained within enum Key by default.
     *
     * @warning The API only work on the android platform for support diversified game controller.
     *
     * @param externalKeyCode   External key code.
     * @param receive   True if external key event on this controller should be receive, false otherwise.
     */
    void receiveExternalKeyEvent(int externalKeyCode, bool receive);

    /**
     * Changes the tag that is used to identify the controller easily.
     * @param tag   A integer that identifies the controller.
     */
    void setTag(int tag) { _controllerTag = tag; }

    /**
     * Returns a tag that is used to identify the controller easily.
     *
     * @return An integer that identifies the controller.
     */
    int getTag() const { return _controllerTag; }

private:
    static std::vector<Controller*> s_allController;

    Controller();
    virtual ~Controller();

    void init();

    void onConnected();
    void onDisconnected();
    void onButtonEvent(int keyCode, bool isPressed, float value, bool isAnalog);
    void onAxisEvent(int axisCode, float value, bool isAnalog);
    void registerListeners();

    std::unordered_map<int, KeyStatus> _allKeyStatus;
    std::unordered_map<int, KeyStatus> _allKeyPrevStatus;

    std::string _deviceName;
    int _deviceId;

    int _controllerTag;

    ControllerImpl* _impl;

    EventDispatcher* _eventDispatcher;
    EventController* _connectEvent;
    EventController* _keyEvent;
    EventController* _axisEvent;

#    if (CC_TARGET_PLATFORM == CC_PLATFORM_LINUX || CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
    // FIXME: Once GLFW 3.3 is bundled with cocos2d-x, remove these unordered
    // maps. They won't be needed. We will only need to provide a mapping from
    // the GLFW gamepad key codes to the Controller::Key.

    // Attach the controller profiles from CCController-linux-win32.cpp to each
    // of the Controller variables in order to minimize profile lookup time.

    // Note: this increases memory usage unnecessarily since the same maps are
    // already stored on ControllerImpl within the static member variable
    // "s_controllerProfiles", but on these platforms the increase in memory
    // usage is negligible.  Peformance over memory optimization was
    // consciously chosen.

    std::unordered_map<int, int> _buttonInputMap;
    std::unordered_map<int, int> _axisInputMap;
#    endif

    friend class ControllerImpl;
    friend class EventListenerController;
};

// end group
/// @}

NS_CC_END
#endif
#endif /* defined(__cocos2d_libs__CCController__) */