InputDetector.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System;

public class InputDetector : MonoBehaviour
{
    public bool logMessages = true;

    int maxJoystickNum = 100;
    int maxButtonNum = 100;
    int maxAxis = 100;
    string testJoyButtonLabel = "";
    string testJoyAxisLabel = "";
    string testKeyboardButtonLabel = "";
    //string testMouseInputLabel = "";
    //string testTouchInputLabel = "";
    const float minAxisValue = 0.25f;

    public Text uiText;


    #region set max joystick num, joystick button num, and joystick axis
    void SetMaxJoystickNum()
    {
        if (maxJoystickNum != 100)
            return;

        for (int i = 1; i <= maxJoystickNum; i++)
        {
            string joystickButton = "joystick " + i.ToString() + " button 0";
            try
            {
                Input.GetKeyDown(joystickButton);
            }
            catch (ArgumentException)
            {
                maxJoystickNum = i - 1;
                if (maxButtonNum >= 0)
                    Debug.LogFormat("Max joystick number found: {0}", maxJoystickNum);
                else
                    Debug.LogError("Max joystick number not found.");

                break;
            }
        }
    }

    void SetMaxJoystickButtonNum()
    {
        if (maxButtonNum != 100)
            return;
        int joyNum = 1;

        for (int i = 0; i <= maxButtonNum; i++)
        {
            string joystickButton = "joystick " + joyNum.ToString() + " button " + i.ToString();
            try
            {
                Input.GetKeyDown(joystickButton);
            }
            catch (ArgumentException)
            {
                maxButtonNum = i - 1;
                if (maxButtonNum >= 0)
                    Debug.LogFormat("Max joystick button number found: {0}.", maxButtonNum);
                else
                    Debug.LogError("Max joystick button not found.");
                break;
            }
        }
    }


    void SetMaxAxisNum()
    {
        if (maxAxis != 100)
            return;

        for (int i = 1; i <= maxAxis; i++)
        {
            string axisName = "axis " + i.ToString();
            try
            {
                Input.GetAxis(axisName);
            }
            catch (ArgumentException)
            {
                maxAxis = i - 1;

                if (maxAxis >= 1)
                    Debug.LogFormat("max joystick axis found: {0}", maxAxis);
                else
                    Debug.LogError("Max joystic axis not found. Ensure that InputManager.assat has the correct axis names available.");
                break;
            }
        }
    }
    #endregion


    void Awake()
    {
        SetMaxJoystickNum();
        SetMaxJoystickButtonNum();
        SetMaxAxisNum();
    }

    void Update()
    {
        TestJoystickButtons();
        TestJoystickAxis();
        TestKeyCodes();
    }


    private void TestTouch()
    {

    }

    private void TestMouse()
    {

    }

    void TestJoystickButtons()
    {
        for (int j = 1; j <= maxJoystickNum; j++)
        {
            for (int i = 0; i <= maxButtonNum; i++)
            {
                string joystickButton = string.Format("joystick {0} button {1}", j, i);

                try
                {
                    if (Input.GetKeyDown(joystickButton))
                    {
                        testJoyButtonLabel = joystickButton;
                        Log(testJoyButtonLabel);
                    }
                }
                catch (ArgumentException)
                { }
            }
        }
    }


    void TestJoystickAxis()
    {
        for (int i = 1; i <= maxAxis; i++)
        {
            string axis = "axis " + i.ToString();
            float value = Input.GetAxis(axis);
            if (Mathf.Abs(value) > minAxisValue)
            {
                string valueLabel = value.ToString("N2");

                if (value < 0)
                    valueLabel = "<color=red>" + valueLabel + "</color>";

                testJoyAxisLabel = axis + "\t" + valueLabel;
                return;
            }
        }
    }



    void TestKeyCodes()
    {
        foreach (KeyCode keyCode in Enum.GetValues(typeof(KeyCode)))
        {
            if (keyCode.ToString().Contains("Joystick"))
                continue;

            if (Input.GetKeyDown(keyCode) && keyCode != KeyCode.None)
            {
                testKeyboardButtonLabel = keyCode.ToString();
                Log(testKeyboardButtonLabel);
            }
        }
    }


    private static Rect fullscreenRect = new Rect(0, 0, Screen.width, Screen.height);
    void OnGUI()
    {
        string label = string.Format("<b>Joystick Button:</b>\n\t{0}\n\n<b>Joystick Axis:</b>\n\t{1}\n\n<b>Keyboard Button:</b>\n\t{2}",
                testJoyButtonLabel, testJoyAxisLabel, testKeyboardButtonLabel);

        if (uiText == null)
        {
            GUI.Label(fullscreenRect, label);
        }
        else
            uiText.text = label;
    }

    void Log(string message)
    {
        if (!logMessages)
            return;

        Debug.Log(message);
    }
}