using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; namespace UnityEditor.UI { [CustomEditor(typeof(Scrollbar), true)] [CanEditMultipleObjects] /// /// Custom Editor for the Scrollbar Component. /// Extend this class to write a custom editor for a component derived from Scrollbar. /// public class ScrollbarEditor : SelectableEditor { SerializedProperty m_HandleRect; SerializedProperty m_Direction; SerializedProperty m_Value; SerializedProperty m_Size; SerializedProperty m_NumberOfSteps; SerializedProperty m_OnValueChanged; protected override void OnEnable() { base.OnEnable(); m_HandleRect = serializedObject.FindProperty("m_HandleRect"); m_Direction = serializedObject.FindProperty("m_Direction"); m_Value = serializedObject.FindProperty("m_Value"); m_Size = serializedObject.FindProperty("m_Size"); m_NumberOfSteps = serializedObject.FindProperty("m_NumberOfSteps"); m_OnValueChanged = serializedObject.FindProperty("m_OnValueChanged"); } public override void OnInspectorGUI() { base.OnInspectorGUI(); EditorGUILayout.Space(); serializedObject.Update(); // EditorGUILayout.PropertyField(m_HandleRect); EditorGUI.BeginChangeCheck(); RectTransform newRectTransform = EditorGUILayout.ObjectField("Handle Rect", m_HandleRect.objectReferenceValue, typeof(RectTransform), true) as RectTransform; if (EditorGUI.EndChangeCheck()) { // Handle Rect will modify its GameObject RectTransform drivenBy, so we need to Record the old and new RectTransform. List modifiedObjects = new List(); modifiedObjects.Add(newRectTransform); foreach (var target in m_HandleRect.serializedObject.targetObjects) { MonoBehaviour mb = target as MonoBehaviour; if (mb == null) continue; modifiedObjects.Add(mb); modifiedObjects.Add(mb.GetComponent()); } Undo.RecordObjects(modifiedObjects.ToArray(), "Change Handle Rect"); m_HandleRect.objectReferenceValue = newRectTransform; } if (m_HandleRect.objectReferenceValue != null) { EditorGUI.BeginChangeCheck(); EditorGUILayout.PropertyField(m_Direction); if (EditorGUI.EndChangeCheck()) { Scrollbar.Direction direction = (Scrollbar.Direction)m_Direction.enumValueIndex; foreach (var obj in serializedObject.targetObjects) { Scrollbar scrollbar = obj as Scrollbar; scrollbar.SetDirection(direction, true); } } EditorGUILayout.PropertyField(m_Value); EditorGUILayout.PropertyField(m_Size); EditorGUILayout.PropertyField(m_NumberOfSteps); bool warning = false; foreach (var obj in serializedObject.targetObjects) { Scrollbar scrollbar = obj as Scrollbar; Scrollbar.Direction dir = scrollbar.direction; if (dir == Scrollbar.Direction.LeftToRight || dir == Scrollbar.Direction.RightToLeft) warning = (scrollbar.navigation.mode != Navigation.Mode.Automatic && (scrollbar.FindSelectableOnLeft() != null || scrollbar.FindSelectableOnRight() != null)); else warning = (scrollbar.navigation.mode != Navigation.Mode.Automatic && (scrollbar.FindSelectableOnDown() != null || scrollbar.FindSelectableOnUp() != null)); } if (warning) EditorGUILayout.HelpBox("The selected scrollbar direction conflicts with navigation. Not all navigation options may work.", MessageType.Warning); EditorGUILayout.Space(); // Draw the event notification options EditorGUILayout.PropertyField(m_OnValueChanged); } else { EditorGUILayout.HelpBox("Specify a RectTransform for the scrollbar handle. It must have a parent RectTransform that the handle can slide within.", MessageType.Info); } serializedObject.ApplyModifiedProperties(); } } }