function CInterface() {
  var _pStartPosAudio;
  var _pStartPosExit;
  var _pStartPosPause;
  var _pStartPosKeeper;
  var _pStartPosLaunch;
  var _pStartPosMatch;
  var _pStartPosGuiBox;
  var _pStartPosFullscreen;

  var _oButExit;
  var _oButPause;
  var _oKeeperText;
  var _oLaunchText;
  var _oHelpPanel = null;
  var _oGuiBox;
  var _oAudioToggle;
  var _oMatchText;
  var _oWinPanel = null;
  var _oLosePanel = null;
  var _oPause;
  var _oButFullscreen;
  var _fRequestFullScreen = null;
  var _fCancelFullScreen = null;
  var _iStep;

  this._init = function () {
    _pStartPosGuiBox = {
      x: 0,
      y: 0,
    };

    _oGuiBox = createBitmap(s_oSpriteLibrary.getSprite("gui_panel"));

    s_oStage.addChild(_oGuiBox);

    _oKeeperText = new createjs.Text(
      TEXT_SCORE_BALL_SAVED + "\n" + 0,
      "32px " + FONT_GAME,
      "#ffffff"
    );
    _oKeeperText.textAlign = "center";
    _oKeeperText.x = CANVAS_WIDTH * 0.5;
    _oKeeperText.y = _oKeeperText.getBounds().height * 0.5;

    _pStartPosKeeper = {
      x: _oKeeperText.x,
      y: _oKeeperText.y,
    };

    s_oStage.addChild(_oKeeperText);

    _oLaunchText = new createjs.Text(
      TEXT_LAUNCH + "\n" + 0,
      "32px " + FONT_GAME,
      "#ffffff"
    );
    _oLaunchText.textAlign = "center";
    _oLaunchText.x = CANVAS_WIDTH * 0.5 - 290;
    _oLaunchText.y = _oLaunchText.getBounds().height * 0.5;

    _pStartPosLaunch = {
      x: _oLaunchText.x,
      y: _oLaunchText.y,
    };

    s_oStage.addChild(_oLaunchText);

    _oMatchText = new createjs.Text(
      TEXT_MATCH + "\n" + 0,
      "32px " + FONT_GAME,
      "#ffffff"
    );
    _oMatchText.textAlign = "center";
    _oMatchText.x = CANVAS_WIDTH * 0.5 - 530;
    _oMatchText.y = _oMatchText.getBounds().height * 0.5;

    _pStartPosMatch = {
      x: _oMatchText.x,
      y: _oMatchText.y,
    };

    s_oStage.addChild(_oMatchText);

    var oSprite = s_oSpriteLibrary.getSprite("but_exit");
    _pStartPosExit = {
      x: CANVAS_WIDTH - oSprite.height / 2 - 20,
      y: oSprite.height / 2 + 10,
    };
    _oButExit = new CGfxButton(_pStartPosExit.x, _pStartPosExit.y, oSprite);
    _oButExit.addEventListener(ON_MOUSE_UP, this._onExit, this);

    var oSprite = s_oSpriteLibrary.getSprite("but_pause");
    _pStartPosPause = {
      x: _pStartPosExit.x - oSprite.height - 10,
      y: _pStartPosExit.y,
    };
    _oButPause = new CGfxButton(_pStartPosPause.x, _pStartPosPause.y, oSprite);
    _oButPause.addEventListener(ON_MOUSE_UP, this.onButPauseRelease, this);

    if (DISABLE_SOUND_MOBILE === false || s_bMobile === false) {
      var oSprite = s_oSpriteLibrary.getSprite("audio_icon");
      _pStartPosAudio = {
        x: _pStartPosPause.x - oSprite.height - 10,
        y: _pStartPosExit.y,
      };
      _oAudioToggle = new CToggle(
        _pStartPosAudio.x,
        _pStartPosAudio.y,
        oSprite,
        s_bAudioActive
      );
      _oAudioToggle.addEventListener(ON_MOUSE_UP, this._onAudioToggle, this);

      oSprite = s_oSpriteLibrary.getSprite("but_fullscreen");
      _pStartPosFullscreen = {
        x: _pStartPosAudio.x - oSprite.width / 2 - 10,
        y: _pStartPosAudio.y,
      };
    } else {
      _pStartPosFullscreen = {
        x: _pStartPosPause.x - oSprite.height - 10,
        y: _pStartPosExit.y,
      };
    }

    var doc = window.document;
    var docEl = doc.documentElement;
    _fRequestFullScreen =
      docEl.requestFullscreen ||
      docEl.mozRequestFullScreen ||
      docEl.webkitRequestFullScreen ||
      docEl.msRequestFullscreen;
    _fCancelFullScreen =
      doc.exitFullscreen ||
      doc.mozCancelFullScreen ||
      doc.webkitExitFullscreen ||
      doc.msExitFullscreen;

    if (ENABLE_FULLSCREEN === false) {
      _fRequestFullScreen = false;
    }

    if (_fRequestFullScreen && screenfull.enabled) {
      oSprite = s_oSpriteLibrary.getSprite("but_fullscreen");

      _oButFullscreen = new CToggle(
        _pStartPosFullscreen.x,
        _pStartPosFullscreen.y,
        oSprite,
        s_bFullscreen,
        s_oStage
      );
      _oButFullscreen.addEventListener(
        ON_MOUSE_UP,
        this._onFullscreenRelease,
        this
      );
    }

    this.refreshButtonPos(s_iOffsetX, s_iOffsetY);
  };

  this.refreshButtonPos = function (iNewX, iNewY) {
    _oButExit.setPosition(_pStartPosExit.x - iNewX, iNewY + _pStartPosExit.y);
    _oButPause.setPosition(
      _pStartPosPause.x - iNewX,
      iNewY + _pStartPosPause.y
    );

    if (DISABLE_SOUND_MOBILE === false || s_bMobile === false) {
      _oAudioToggle.setPosition(
        _pStartPosAudio.x - iNewX,
        iNewY + _pStartPosAudio.y
      );
    }

    if (_fRequestFullScreen && screenfull.enabled) {
      _oButFullscreen.setPosition(
        _pStartPosFullscreen.x - s_iOffsetX,
        _pStartPosFullscreen.y + s_iOffsetY
      );
    }

    _oGuiBox.y = _pStartPosGuiBox.y + iNewY;

    _oKeeperText.x = _pStartPosKeeper.x + iNewX;
    _oKeeperText.y = _pStartPosKeeper.y + iNewY;
    _oLaunchText.x = _pStartPosLaunch.x + iNewX;
    _oLaunchText.y = _pStartPosLaunch.y + iNewY;

    _oMatchText.x = _pStartPosMatch.x + iNewX;
    _oMatchText.y = _pStartPosMatch.y + iNewY;
  };

  this.unload = function () {
    _oButExit.unload();
    _oButExit = null;

    this.onExitFromHelp();
    if_menu = true;
    if (DISABLE_SOUND_MOBILE === false || s_bMobile === false) {
      _oAudioToggle.unload();
      _oAudioToggle = null;
    }

    if (_fRequestFullScreen && screenfull.enabled) {
      _oButFullscreen.unload();
    }
    s_oInterface = null;
  };

  this.refreshBallSaved = function (iGoalSaved, iTarget) {
    _oKeeperText.text =
      TEXT_SCORE_BALL_SAVED + "\n" + iGoalSaved + " " + TEXT_OF + " " + iTarget;
  };

  this.refreshLaunch = function (iLaunch, iMaxLaunch) {
    _oLaunchText.text =
      TEXT_LAUNCH + "\n" + iLaunch + " " + TEXT_OF + " " + iMaxLaunch;
  };

  this.onExitFromHelp = function () {
    if (_oHelpPanel !== null) {
      _oHelpPanel.unload();
      _oHelpPanel = null;
      if_menu = true;
    }
  };

  this.createLosePanel = function (iBallSaved, iTarget) {
    _oLosePanel = new CLosePanel(s_oSpriteLibrary.getSprite("msg_box"));
    _oLosePanel.show(iBallSaved, iTarget);
  };

  this.createWinPanel = function (iBallSaved, iPerfect, iTarget, oScore, bEnd) {
    _oWinPanel = new CWinPanel(s_oSpriteLibrary.getSprite("msg_box"), bEnd);
    _oWinPanel.show(iBallSaved, iPerfect, iTarget, oScore);
  };

  this.createHelpPanel = function () {
    if_menu = false;
    createjs.Ticker.paused = false;
    _oHelpPanel = new CHelpPanel(0, 0, s_oSpriteLibrary.getSprite("msg_box"));
  };

  this.createAnimText = function (szText, iSize, bStrobo) {
    var oContainer = new createjs.Container();

    var oTextStroke = new createjs.Text(
      szText,
      iSize + "px " + SECONDARY_FONT,
      "#000000"
    );
    oTextStroke.x = 0;
    oTextStroke.y = 0;
    oTextStroke.textAlign = "center";
    oTextStroke.outline = 3;
    oContainer.addChild(oTextStroke);

    var oText = new createjs.Text(
      oTextStroke.text,
      iSize + "px " + SECONDARY_FONT,
      "#ffffff"
    );
    oText.x = 0;
    oText.y = 0;
    oText.textAlign = "center";
    oContainer.addChild(oText);

    oContainer.x = CANVAS_WIDTH_HALF;
    oContainer.y = -oTextStroke.getBounds().height;

    if (bStrobo) {
      s_oInterface.strobeText(oText);
    }

    s_oStage.addChild(oContainer);

    createjs.Tween.get(oContainer)
      .to(
        {
          y: CANVAS_HEIGHT_HALF,
        },
        500,
        createjs.Ease.cubicOut
      )
      .call(function () {
        createjs.Tween.get(oContainer)
          .wait(250)
          .to(
            {
              y: CANVAS_HEIGHT + oTextStroke.getBounds().height,
            },
            500,
            createjs.Ease.cubicIn
          )
          .call(function () {
            if (bStrobo) {
              createjs.Tween.removeTweens(oText);
            }
            s_oStage.removeChild(oContainer);
          });
      });
  };

  this.strobeText = function (oText) {
    createjs.Tween.get(oText)
      .wait(30)
      .call(function () {
        if (_iStep < TEXT_EXCELLENT_COLOR.length - 1) {
          _iStep++;
        } else {
          _iStep = 0;
        }
        oText.color = TEXT_EXCELLENT_COLOR[_iStep];
        s_oInterface.strobeText(oText);
      });
  };

  this.createExtendedTimeText = function () {
    var oContainer = new createjs.Container();

    var oExtTimeTextStroke = new createjs.Text(
      TEXT_TIE,
      "50px " + FONT_GAME,
      "#000000"
    );
    oExtTimeTextStroke.x = 0;
    oExtTimeTextStroke.y = 0;
    oExtTimeTextStroke.textAlign = "center";
    oExtTimeTextStroke.outline = 5;
    oContainer.addChild(oExtTimeTextStroke);

    var oExtTimeText = new createjs.Text(
      oExtTimeTextStroke.text,
      "50px " + FONT_GAME,
      "#ffffff"
    );
    oExtTimeText.x = 0;
    oExtTimeText.y = 0;
    oExtTimeText.textAlign = "center";
    oContainer.addChild(oExtTimeText);

    oContainer.x = -oExtTimeTextStroke.getBounds().width;
    oContainer.y = CANVAS_HEIGHT * 0.5;

    s_oStage.addChild(oContainer);

    createjs.Tween.get(oContainer)
      .to(
        {
          x: CANVAS_WIDTH * 0.5,
        },
        750,
        createjs.Ease.cubicOut
      )
      .call(function () {
        createjs.Tween.get(oContainer)
          .to(
            {
              x: CANVAS_WIDTH + oExtTimeTextStroke.getBounds().width,
            },
            750,
            createjs.Ease.cubicIn
          )
          .call(function () {
            s_oGame.extendLaunch();
            s_oStage.removeChild(oContainer);
          });
      });
  };

  this.refreshMatchNum = function (iLevel) {
    _oMatchText.text = TEXT_MATCH + "\n" + iLevel;
  };

  this._onAudioToggle = function () {
    Howler.mute(s_bAudioActive);
    s_bAudioActive = !s_bAudioActive;
    if (s_bAudioActive) {
      localStorage.setItem("sound", 1);
    } else {
      localStorage.setItem("sound", 0);
    }
  };

  this._onExit = function () {
    var _oAreYouSure = new CAreYouSurePanel(s_oStage);
    _oAreYouSure.show();
  };

  this.unloadPause = function () {
    _oPause.unload();
    _oPause = null;
  };

  this.onButPauseRelease = function () {
    _oPause = new CPause();
  };

  this.resetFullscreenBut = function () {
    if (_fRequestFullScreen && screenfull.enabled) {
      _oButFullscreen.setActive(s_bFullscreen);
    }
  };

  this._onFullscreenRelease = function () {
    if (s_bFullscreen) {
      _fCancelFullScreen.call(window.document);
    } else {
      _fRequestFullScreen.call(window.document.documentElement);
    }

    sizeHandler();
  };

  s_oInterface = this;

  this._init();

  return this;
}

var s_oInterface = null;