using System;
using UnityEditor;
using UnityEngine;

public class TestWindow : EditorWindow {
	[MenuItem("Test/Test Window")]
	public static void Init()
	{
		CreateInstance().Show();
	}

	private Vector2 scrollPosition = new Vector2(0,0);
	private int testValue;
	public void OnGUI()
	{
		scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);
		TestLabels();

		EditorGUILayout.Space();
		EditorGUILayout.LabelField("After 10 levels of indentation:");
		EditorGUILayout.Space();

		using (new ScopedIndent(10))
		{
			TestLabels();
		}

		EditorGUILayout.EndScrollView();
	}

	private void TestLabels()
	{
		testValue = EditorGUILayout.IntField("This is a label:", testValue);
		testValue = EditorGUILayout.IntField("This is a much longer label:", testValue);
		testValue = EditorGUILayout.IntField("Min width:", testValue, GUILayout.MinWidth(300));
		testValue = EditorGUILayout.IntField("Max width:", testValue, GUILayout.MaxWidth(300));
		EditorGUILayout.BeginHorizontal();
		EditorGUILayout.LabelField("Horizontal group:");
		testValue = EditorGUILayout.IntField(testValue);
		EditorGUILayout.EndHorizontal();
		using (new FixedWidthLabel("Fixed width (label only):"))
		{
			testValue = EditorGUILayout.IntField(testValue);
		}
		using (new FixedWidthLabel("This is a longer fixed width label:"))
		{
			testValue = EditorGUILayout.IntField(testValue);
		}
		using (new FixedWidthLabel("Two vertical input boxes:"))
		{
			EditorGUILayout.BeginVertical();
			testValue = EditorGUILayout.IntField(testValue);
			testValue = EditorGUILayout.IntField(testValue);
			EditorGUILayout.EndVertical();
		}
		using (new FixedWidthLabel("Two horizontal input boxes:"))
		{
			testValue = EditorGUILayout.IntField(testValue);
			testValue = Convert.ToInt32(EditorGUILayout.TextField(testValue + ""));
		}
		using (new FixedWidthLabel("Nesting:"))
		{
			testValue = EditorGUILayout.IntField(testValue);
			using (new FixedWidthLabel("Testing:"))
			{
				testValue = EditorGUILayout.IntField(testValue);
			}
		}
		using (new FixedWidthLabel("Vertical + nested:"))
		{
			EditorGUILayout.BeginVertical();
			testValue = EditorGUILayout.IntField(testValue);
			testValue = EditorGUILayout.IntField(testValue);
			using (new FixedWidthLabel("Nesting:"))
			{
				testValue = EditorGUILayout.IntField(testValue);
				using (new FixedWidthLabel("Testing:"))
				{
					testValue = EditorGUILayout.IntField(testValue);
				}
			}
			EditorGUILayout.EndVertical();
		}
	}
}

public class ScopedIndent : IDisposable
{
	private readonly int delta;
	public ScopedIndent(int delta)
	{
		this.delta = delta;
		EditorGUI.indentLevel += delta;
	}

	public void Dispose()
	{
		EditorGUI.indentLevel -= delta;
	}
}