Keyboard shuffle for more feature flutter

this is my code for a keyboard this is not a full code I did a complete customer numeric keyboard but I need now a shuffle or slideable keyboard to add more math functions and also I try to add a mobile default keyboard for typing. because my app is cal and note

Column(
              children: [
                SwipeTo(
                  child: Container(
                    child: Column(
                      children: [
                        Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: <Widget>[
                            Container(
                              width: queryData.size.width * 0.6,
                              child: Table(
                                children: [
                                  TableRow(children: [
                                    buildButton("7", 1.8, Colors.blue),
                                    buildButton("8", 1.8, Colors.blue),
                                    buildButton("9", 1.8, Colors.blue),
                                  ]),
                                  TableRow(children: [
                                    buildButton("4", 1.8, Colors.blue),
                                    buildButton("5", 1.8, Colors.blue),
                                    buildButton("6", 1.8, Colors.blue),
                                  ]),
                                  TableRow(children: [
                                    buildButton("1", 1.8, Colors.blue),
                                    buildButton("2", 1.8, Colors.blue),
                                    buildButton("3", 1.8, Colors.blue),
                                  ]),
                                  TableRow(children: [
                                    buildButton("0", 1.8, Colors.blue),
                                    buildButton(".", 1.8, Colors.blue),
                                    buildButton("=", 1.8, Colors.blue),
                                  ]),
                                ],
                              ),
                            ),