GlyphRectPropertyDrawer.cs

using UnityEngine;
using UnityEngine.TextCore;
using UnityEditor;
using System.Collections;


namespace TMPro.EditorUtilities
{

    [CustomPropertyDrawer(typeof(GlyphRect))]
    public class GlyphRectPropertyDrawer : PropertyDrawer
    {
        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            //EditorGUI.BeginProperty(position, label, property);

            SerializedProperty prop_X = property.FindPropertyRelative("m_X");
            SerializedProperty prop_Y = property.FindPropertyRelative("m_Y");
            SerializedProperty prop_Width = property.FindPropertyRelative("m_Width");
            SerializedProperty prop_Height = property.FindPropertyRelative("m_Height");

            // We get Rect since a valid position may not be provided by the caller.
            Rect rect = new Rect(position.x, position.y, position.width, 49);
            EditorGUI.LabelField(rect, new GUIContent("Glyph Rect"));

            EditorGUIUtility.labelWidth = 30f;
            EditorGUIUtility.fieldWidth = 10f;

            //GUI.enabled = false;
            float width = (rect.width - 75f) / 4;
            EditorGUI.PropertyField(new Rect(rect.x + width * 0, rect.y + 20, width - 5f, 18), prop_X, new GUIContent("X:"));
            EditorGUI.PropertyField(new Rect(rect.x + width * 1, rect.y + 20, width - 5f, 18), prop_Y, new GUIContent("Y:"));
            EditorGUI.PropertyField(new Rect(rect.x + width * 2, rect.y + 20, width - 5f, 18), prop_Width, new GUIContent("W:"));
            EditorGUI.PropertyField(new Rect(rect.x + width * 3, rect.y + 20, width - 5f, 18), prop_Height, new GUIContent("H:"));

            //EditorGUI.EndProperty();
        }

        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
        {
            return 45f;
        }
    }
}