XCharts/Scripts/Editor/PropertyDrawers/AreaStyleDrawer.cs

using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

namespace XCharts
{
    [CustomPropertyDrawer(typeof(AreaStyle), true)]
    public class AreaStyleDrawer : PropertyDrawer
    {
        private Dictionary<string, bool> m_AreaStyleToggle = new Dictionary<string, bool>();

        public override void OnGUI(Rect pos, SerializedProperty prop, GUIContent label)
        {
            Rect drawRect = pos;
            drawRect.height = EditorGUIUtility.singleLineHeight;
            SerializedProperty show = prop.FindPropertyRelative("m_Show");
            SerializedProperty m_Origin = prop.FindPropertyRelative("m_Origin");
            SerializedProperty m_Color = prop.FindPropertyRelative("m_Color");
            SerializedProperty m_ToColor = prop.FindPropertyRelative("m_ToColor");
            SerializedProperty m_Opacity = prop.FindPropertyRelative("m_Opacity");

            ChartEditorHelper.MakeFoldout(ref drawRect, ref m_AreaStyleToggle, prop, "Area Style", show, false);
            drawRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
            if (ChartEditorHelper.IsToggle(m_AreaStyleToggle, prop))
            {
                ++EditorGUI.indentLevel;
                EditorGUI.PropertyField(drawRect, m_Origin);
                drawRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
                EditorGUI.PropertyField(drawRect, m_Color);
                drawRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
                EditorGUI.PropertyField(drawRect, m_ToColor);
                drawRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
                EditorGUI.PropertyField(drawRect, m_Opacity);
                drawRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
                --EditorGUI.indentLevel;
            }
        }

        public override float GetPropertyHeight(SerializedProperty prop, GUIContent label)
        {
            float height = 0;
            if (ChartEditorHelper.IsToggle(m_AreaStyleToggle, prop))
            {
                height += 5 * EditorGUIUtility.singleLineHeight + 4 * EditorGUIUtility.standardVerticalSpacing;
            }
            else
            {
                height += 1 * EditorGUIUtility.singleLineHeight + 1 * EditorGUIUtility.standardVerticalSpacing;
            }
            return height;
        }
    }
}