ToolTipBackgroundMesh.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;

namespace HoloToolkit.UX.ToolTips
{
    public class ToolTipBackgroundMesh : ToolTipBackground
    {
        [SerializeField]
        [Tooltip("Transform that scale and offset will be applied to.")]
        private Transform backgroundTransform;

        private float depth = 1f;

        protected Bounds localContentBounds;

        public MeshRenderer BackgroundRenderer;

        public bool IsVisible
        {
            set
            {
                if (BackgroundRenderer)
                {
                    BackgroundRenderer.enabled = value;
                }
            }
        }

        public Transform BackgroundTransform
        {
            get
            {
                return backgroundTransform;
            }

            set
            {
                backgroundTransform = value;
            }
        }

        protected override void ScaleToFitContent()
        {
            if (BackgroundRenderer != null)
            {
                //Get the local size of the content - this is the scale of the text under the content parent
                Vector3 localContentSize = toolTip.LocalContentSize;
                Vector3 localContentOffset = toolTip.LocalContentOffset;

                //Get the size of the mesh and use this to adjust the local content size on the x / y axis
                //This will accomodate meshes that aren't built to 1,1 scale
                Bounds meshBounds = BackgroundRenderer.GetComponent<MeshFilter>().sharedMesh.bounds;
                localContentSize.x /= meshBounds.size.x;
                localContentSize.y /= meshBounds.size.y;
                localContentSize.z = depth;
               
                //Don't use the mesh bounds for local content since an offset center may be used for design effect
                if (localContentSize.x > 0 && localContentSize.y > 0)
                {
                    localContentBounds = new Bounds(localContentOffset, localContentSize);
                }
            }
        }

        private void OnDrawGizmos()
        {
            if (Application.isPlaying)
                return;

            if (toolTip == null)
                toolTip = gameObject.GetComponent<ToolTip>();

            if (toolTip == null)
                return;

            ScaleToFitContent();
        }


    }
}