HKIVar_ContainerHeader.cs

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using UnityEngine;
using UnityEditor;
using HKI.Core.Variables;
using HKI.Core.Variables.Editor;

namespace HKI.Core.Variables.Editor
{
    public class HKIVar_ContainerHeader
    {
        // Private variables
        const float buttonHeight = 14.0f;
        int varTypesSlideId = 1;
        int selectedVarTypeId = 0;

        bool isLimited = false;
        int limitedVarTypesSlideId = 0;

        const string containerSPName = "container";
        SerializedProperty containerSP = null;

        UnityEngine.Object container = null;

        // Interface function
        public HKIVar_ContainerHeader(SerializedObject serializedObject, UnityEngine.Object container, bool isLimited = false, int limitedVarTypesSlideId = 0)
        {
            this.container = container;
            this.isLimited = isLimited;
            this.limitedVarTypesSlideId = limitedVarTypesSlideId;

            containerSP = serializedObject.FindProperty(containerSPName);
        }

        public void DrawHeader()
        {
            EditorGUILayout.LabelField("Create new element in this container", EditorStyles.boldLabel);

            EditorGUILayout.BeginHorizontal();

            GUI.enabled = !isLimited;
            int newVarTypesSlideId = EditorGUILayout.Popup(isLimited ? limitedVarTypesSlideId : varTypesSlideId, HKIVarTypes.VarTypesCollectionNames.ToArray());
            GUI.enabled = true;
            if (newVarTypesSlideId != varTypesSlideId)
            {
                varTypesSlideId = newVarTypesSlideId;
                selectedVarTypeId = 0;
            }

            selectedVarTypeId = EditorGUILayout.Popup(selectedVarTypeId, HKIVarTypes.VarTypesCollections[varTypesSlideId].TypeNames.ToArray());

            if (GUILayout.Button("Add", GUILayout.Width(50.0f), GUILayout.Height(buttonHeight)))
            {
                HKIVar newVariable = (HKIVar)ScriptableObject.CreateInstance(HKIVarTypes.VarTypesCollections[varTypesSlideId].Types[selectedVarTypeId]);
                newVariable.name = "New " + HKIVarTypes.VarTypesCollections[varTypesSlideId].TypeNames[selectedVarTypeId];

                AssetDatabase.AddObjectToAsset(newVariable, container);
                AssetDatabase.ImportAsset(AssetDatabase.GetAssetPath(newVariable));

                containerSP.InsertArrayElementAtIndex(containerSP.arraySize);
                SerializedProperty elementSP = containerSP.GetArrayElementAtIndex(containerSP.arraySize - 1);

                elementSP.objectReferenceValue = newVariable;
            }

            EditorGUILayout.EndHorizontal();
        }
    }
}