Version: 2020.3
LanguageEnglish
  • C#

EditorGUILayout.BeginFoldoutHeaderGroup

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Declaration

public static bool BeginFoldoutHeaderGroup(bool foldout, string content, GUIStyle style = EditorStyles.foldoutHeader, Action<Rect> menuAction, GUIStyle menuIcon);

Declaration

public static bool BeginFoldoutHeaderGroup(bool foldout, GUIContent content, GUIStyle style = EditorStyles.foldoutHeader, Action<Rect> menuAction, GUIStyle menuIcon);

Parameters

foldout The shown foldout state.
content The label to show.
style Optional GUIStyle.
menuAction The action that happens when you click the icon.
menuIcon Optional GUIStyle for icon.

Returns

bool The foldout state selected by the user. If true, you should render sub-objects.

Description

Make a label with a foldout arrow to the left of it.

This is useful for folder-like structures, where child objects only appear if you've unfolded the parent folder. This control cannot be nested in another BeginFoldoutHeaderGroup. To use multiple of these foldouts, you must end each method with EndFoldoutHeaderGroup.


Create a foldable header menu that hides or shows the selected Transform.

// Create a foldable header menu that hides or shows the selected Transform position.
// If you have not selected a Transform, the Foldout item stays folded until
// you select a Transform.

using UnityEditor; using UnityEngine;

public class FoldoutHeaderUsage : EditorWindow { bool showPosition = true; string status = "Select a GameObject";

[MenuItem("Examples/Foldout Header Usage")] static void CreateWindow() { GetWindow<FoldoutHeaderUsage>(); }

public void OnGUI() { showPosition = EditorGUILayout.BeginFoldoutHeaderGroup(showPosition, status);

if (showPosition) if (Selection.activeTransform) { Selection.activeTransform.position = EditorGUILayout.Vector3Field("Position", Selection.activeTransform.position); status = Selection.activeTransform.name; }

if (!Selection.activeTransform) { status = "Select a GameObject"; showPosition = false; } // End the Foldout Header that we began above. EditorGUILayout.EndFoldoutHeaderGroup(); } }


Create a menu item action that moves the selected object to 0,0,0 when you click it.

// Create a foldable header menu that hides or shows the selected Transform position.
// If you have not selected a Transform, the Foldout item stays folded until
// you select a Transform.

using UnityEditor; using UnityEngine;

public class FoldoutHeaderUsage : EditorWindow { bool showPosition = true; string status = "Select a GameObject";

[MenuItem("Examples/Foldout Header Usage")] static void CreateWindow() { GetWindow<FoldoutHeaderUsage>(); }

public void OnGUI() { showPosition = EditorGUILayout.BeginFoldoutHeaderGroup(showPosition, status, null, ShowHeaderContextMenu);

if (showPosition) if (Selection.activeTransform) { Selection.activeTransform.position = EditorGUILayout.Vector3Field("Position", Selection.activeTransform.position); status = Selection.activeTransform.name; }

if (!Selection.activeTransform) { status = "Select a GameObject"; showPosition = false; } // End the Foldout Header that we began above. EditorGUILayout.EndFoldoutHeaderGroup(); }

void ShowHeaderContextMenu(Rect position) { var menu = new GenericMenu(); menu.AddItem(new GUIContent("Move to (0,0,0)"), false, OnItemClicked); menu.DropDown(position); }

void OnItemClicked() { Undo.RecordObject(Selection.activeTransform, "Moving to center of world"); Selection.activeTransform.position = Vector3.zero; } }