a simple implement for game controller

client/eventsSDL/InputSourceGameController.h

@@ -0,0 +1,57 @@
+/*
+* InputSourceGameController.h, part of VCMI engine
+*
+* Authors: listed in file AUTHORS in main folder
+*
+* License: GNU General Public License v2.0 or later
+* Full text of license available in license.txt file, in main folder
+*
+*/
+
+#pragma once
+
+#include <memory>
+#include <SDL.h>
+
+#include "../../lib/Point.h"
+#include "../gui/Shortcut.h"
+
+
+const int AXIS_DEAD_ZOOM = 6000;
+const int AXIS_MAX_ZOOM = 32000;
+const int AXIS_MOVE_SPEED = 500;
+const int AXIS_CURSOR_MOVE_INTERVAL = 1000;
+const int TRIGGER_PRESS_THRESHOLD = 8000;
+
+
+/// Class that handles game controller input from SDL events
+class InputSourceGameController
+{
+    static void gameControllerDeleter(SDL_GameController * gameController);
+    using GameControllerPtr = std::unique_ptr<SDL_GameController, decltype(&gameControllerDeleter)>;
+
+    std::map<int, GameControllerPtr> gameControllerMap;
+    long long lastCheckTime;
+    int axisValueX;
+    int axisValueY;
+    float planDisX;
+    float planDisY;
+
+    void openGameController(int index);
+    int getJoystickIndex(SDL_GameController * controller);
+    int getRealAxisValue(int value);
+    void dispatchTriggerShortcuts(const std::vector<EShortcut> & shortcutsVector, int axisValue);
+    void doCursorMove(int deltaX, int deltaY);
+    int getMoveDis(float planDis);
+
+public:
+    InputSourceGameController();
+    void tryOpenAllGameControllers();
+    void handleEventDeviceAdded(const SDL_ControllerDeviceEvent & device);
+    void handleEventDeviceRemoved(const SDL_ControllerDeviceEvent & device);
+    void handleEventDeviceRemapped(const SDL_ControllerDeviceEvent & device);
+    void handleEventAxisMotion(const SDL_ControllerAxisEvent & axis);
+    void handleEventButtonDown(const SDL_ControllerButtonEvent & button);
+    void handleEventButtonUp(const SDL_ControllerButtonEvent & button);
+    void handleUpdate();
+};