MainMenuCanvasTemplate

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

/*
 http://stackoverflow.com/questions/36809687/ui-canvas-image-with-ui-buttons
 */

public class MainMenuCanvas : MonoBehaviour
{
    public Button playButton;
    public Button settingsButton;
    public Button exitGameButton;

    public Canvas settingsCanvas;

    // Use this for initialization
    void OnEnable()
    {
        //Register Button Events
        playButton.onClick.AddListener(() => buttonCallBack(playButton));
        settingsButton.onClick.AddListener(() => buttonCallBack(settingsButton));
        exitGameButton.onClick.AddListener(() => buttonCallBack(exitGameButton));
    }


    private void buttonCallBack(Button buttonPressed)
    {
        //Play Button Pressed
        if (buttonPressed == playButton)
        {
            //Hide this Menu UI
            gameObject.SetActive(false);
            //Load Game Scene
            SceneManager.LoadScene("Game");
        }

        //Settings Button Pressed
        if (buttonPressed == settingsButton)
        {
            //Hide Menu Canvas
            gameObject.SetActive(false);

            //Show Settings Canvas
            settingsCanvas.gameObject.SetActive(true);

            //Tell the settings Canvas that we are calling it from the Main Menu so that the Stettings' back button will return here
            SettingsCanvas sV = settingsCanvas.GetComponent<SettingsCanvas>();
            sV.setCalledFrom(SettingsCalledFrom.calledFromMainMenu);
        }

        //Exit Game Button Pressed
        if (buttonPressed == exitGameButton)
        {
#if UNITY_EDITOR
            UnityEditor.EditorApplication.isPlaying = false;
#else

            Application.Quit();
#endif
        }
    }


    void OnDisable()
    {
        //Un-Register Button Events
        playButton.onClick.RemoveAllListeners();
        settingsButton.onClick.RemoveAllListeners();
        exitGameButton.onClick.RemoveAllListeners();
    }
}