LVRing.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;

namespace Seci.LabView.Controls
{
    class LvRing : LvControl
    {
        private String[] _items;

        public LvRing(String name, String[] items, SerialisableList<int> indices)
        {
            _name = name;

            _items = items;

            if (indices != null)
            {
                _clusterIndices = (Seci.SerialisableList<int>)indices.Clone();
            }
        }

        public override String GetNameAndType()
        {
            return _name + " (Ring)";
        }

        public override String GetControlType()
        {
            return "RING";
        }

        public override String[] GetValue(ref strongnameLabview.VirtualInstrument vi)
        {
            String temp;

            if (_clusterIndices == null)
            {
                if (_items != null)
                {
                    temp = _items[Convert.ToInt16(vi.GetControlValue(_name))];
                }
                else
                {
                    temp = vi.GetControlValue(_name).ToString();
                }
            }
            else
            {
                if (_items != null)
                {
                    temp = _items[Convert.ToInt16(GetValueFromCluster(vi)[_clusterIndices[_clusterIndices.Count - 1]])];
                }
                else
                {
                    temp = GetValueFromCluster(vi)[_clusterIndices[_clusterIndices.Count - 1]].ToString();

                }
            }

            String[] result = { temp };

            return result;
        }

        public override void SetValue(ref strongnameLabview.VirtualInstrument vi, Object value)
        {
            //Check that value is either the index to set or the name of the value to set
            int val = 0;

            if (value.GetType() == typeof(Int16))
            {
                val = Convert.ToInt16(value);
            }
            else if (value.GetType() == typeof(String))
            {
                for (int i = 0; i < _items.GetLength(0); ++i)
                {
                    if (_items[i] == value.ToString())
                    {
                        val = i;
                        break;
                    }
                }
            }
            else
            {
                //Invalid value
                throw new ArgumentException("Value sent to ring was invalid.");
            }

            if (_clusterIndices == null)
            {
                vi.SetControlValue(_name, val);
            }
            else
            {
                SetValueInCluster(ref vi, val);
            }
        }
    }
}