Widget defaultDrawer(BuildContext context) {
    return Drawer(
      child: ListView(
        padding: EdgeInsets.zero,
        children: <Widget>[
          new DrawerHeader(
            child: Center(
              child: new Image.asset(
                "assets/logos/logo-color.png",
              ),
            ),
          ),
          ListTile(
            key: new Key("Home"),
            title: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Icon(
                  Icons.home,
                  color: hexToColor("#979797"),
                ),
                new Padding(
                  padding: EdgeInsets.all(10.0),
                ),
                new Text(
                  "Home",
                  style: TextStyle(
                    color: hexToColor("#979797"),
                    fontWeight: FontWeight.bold,
                    fontSize: 20.0,
                  ),
                ),
              ],
            ),
            onTap: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => HomePage()
                ),
              );
            },
          ),
          ListTile(
            key: new Key("Ceremonies"),
            title: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Icon(
                  Icons.graphic_eq,
                  color: hexToColor("#979797"),
                ),
                new Padding(
                  padding: EdgeInsets.all(10.0),
                ),
                new Text(
                  "Ceremonies",
                  style: TextStyle(
                    color: hexToColor("#979797"),
                    fontWeight: FontWeight.bold,
                    fontSize: 20.0,
                  ),
                ),
              ],
            ),
            onTap: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => ListCeremonies()
                ),
              );
            }, //TODO: Implement fungsi buat callback kalo mencet Ceremonies di drawer
          ),
          ListTile(
            key: new Key("Problems"),
            title: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Icon(
                  Icons.warning,
                  color: hexToColor("#979797"),
                ),
                new Padding(
                  padding: EdgeInsets.all(10.0),
                ),
                new Text(
                  "Problems",
                  style: TextStyle(
                    color: hexToColor("#979797"),
                    fontWeight: FontWeight.bold,
                    fontSize: 20.0,
                  ),
                ),
              ],
            ),
            onTap: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => ListProblems()
                ),
              );
            },
          ),
          ListTile(
            key: new Key("Glossary"),
            title: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Icon(
                  Icons.book,
                  color: hexToColor("#979797"),
                ),
                new Padding(
                  padding: EdgeInsets.all(10.0),
                ),
                new Text(
                  "Glossary",
                  style: TextStyle(
                    color: hexToColor("#979797"),
                    fontWeight: FontWeight.bold,
                    fontSize: 20.0,
                  ),
                ),
              ],
            ),
            onTap: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => GlossaryPage()
                ),
              );
            }, //TODO: Implement fungsi buat callback kalo mencet Glossary di drawer
          ),
          ListTile(
            key: new Key("Pop Quiz!"),
            title: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Icon(
                  Icons.question_answer,
                  color: hexToColor("#979797"),
                ),
                new Padding(
                  padding: EdgeInsets.all(10.0),
                ),
                new Text(
                  "Pop Quiz!",
                  style: TextStyle(
                    color: hexToColor("#979797"),
                    fontWeight: FontWeight.bold,
                    fontSize: 20.0,
                  ),
                ),
              ],
            ),
            onTap: () {}, //TODO: Implement fungsi buat callback kalo mencet Pop Quiz di drawer
          ),
          ListTile(
            key: new Key("About"),
            title: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Icon(
                  Icons.info,
                  color: hexToColor("#979797"),
                ),
                new Padding(
                  padding: EdgeInsets.all(10.0),
                ),
                new Text(
                  "About",
                  style: TextStyle(
                    color: hexToColor("#979797"),
                    fontWeight: FontWeight.bold,
                    fontSize: 20.0,
                  ),
                ),
              ],
            ),
            onTap: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => AboutPage()
                ),
              );
            }, //TODO: Implement fungsi buat callback kalo mencet About di drawer
          ),
        ],
      ),
    );
  }