SymbolDisableHighlight.cs

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See LICENSE in the project root for license information.

using UnityEngine;
using UnityEngine.UI;

namespace HoloToolkit.UI.Keyboard
{
    public class SymbolDisableHighlight : MonoBehaviour
    {
        [SerializeField]
        private Text m_TextField = null;

        [SerializeField]
        private Image m_ImageField = null;

        [SerializeField]
        private Color m_DisabledColor = Color.grey;

        private Color m_StartingColor = Color.white;

        private Button m_Button = null;

        private void Start()
        {
            if (m_TextField != null)
            {
                m_StartingColor = m_TextField.color;
            }

            if (m_ImageField != null)
            {
                m_StartingColor = m_ImageField.color;
            }

            m_Button = GetComponentInParent<Button>();

            UpdateState();
        }

        private void Update()
        {
            UpdateState();
        }

        private void UpdateState()
        {
            if (m_TextField != null && m_Button != null)
            {
                m_TextField.color = m_Button.interactable ? m_StartingColor : m_DisabledColor;
            }

            if (m_ImageField != null && m_Button != null)
            {
                m_ImageField.color = m_Button.interactable ? m_StartingColor : m_DisabledColor;
            }
        }
    }
}