TableMatrixAttribute class

// Inheriting from SerializedMonoBehaviour is only needed if you want Odin to serialize the multi-dimensional arrays for you.
// If you prefer doing that yourself, you can still make Odin show them in the inspector using the ShowInInspector attribute.
public class TableMatrixExamples : SerializedMonoBehaviour
{
    [InfoBox("Right-click and drag column and row labels in order to modify the tables."), PropertyOrder(-10), OnInspectorGUI]
    private void ShowMessageAtOP() { }

    [BoxGroup("Two Dimensional array without the TableMatrix attribute.")]
    public bool[,] BooleanTable = new bool[15, 6];

    [BoxGroup("ReadOnly table")]
    [TableMatrix(IsReadOnly = true)]
    public int[,] ReadOnlyTable = new int[5, 5];

    [BoxGroup("Labled table")]
    [TableMatrix(HorizontalTitle = "X axis", VerticalTitle = "Y axis")]
    public GameObject[,] LabledTable = new GameObject[15, 10];

    [BoxGroup("Enum table")]
    [TableMatrix(HorizontalTitle = "X axis")]
    public InfoMessageType[,] EnumTable = new InfoMessageType[4,4];

    [BoxGroup("Custom table")]
    [TableMatrix(DrawElementMethod = "DrawColoredEnumElement", ResizableColumns = false)]
    public bool[,] CustomCellDrawing = new bool[30,30];

    #if UNITY_EDITOR

        private static bool DrawColoredEnumElement(Rect rect, bool value)
        {
            if (Event.current.type == EventType.MouseDown && rect.Contains(Event.current.mousePosition))
            {
                value = !value;
                GUI.changed = true;
                Event.current.Use();
            }

            UnityEditor.EditorGUI.DrawRect(rect.Padding(1), value ? new Color(0.1f, 0.8f, 0.2f) : new Color(0, 0, 0, 0.5f));

            return value;
        }

    #endif
}