EditorWindow.HasOpenInstances

Parameters

Returns

bool Returns true if an EditorWindow, matching the specified type, is open. Returns false otherwise.

Description

Checks if an editor window is open.

using UnityEngine;
using UnityEditor;

public class MyWindow : EditorWindow
{
    string myString = "Hello World";

    // Add menu named "My Window" to the Window menu
    [MenuItem("Window/My Window")]
    static void Init()
    {
        // Get existing open window or if none, make a new one:
        MyWindow window = (MyWindow)EditorWindow.GetWindow(typeof(MyWindow));
        window.Show();
    }

    [MenuItem("Window/Close My Window")]
    static void Close()
    {
        // Checks if any window of type MyWindow is open
        if (EditorWindow.HasOpenInstances<MyWindow>())
        {
            var window = EditorWindow.GetWindow(typeof(MyWindow));
            window.Close();
        }
    }

    void OnGUI()
    {
        GUILayout.Label("Base Settings", EditorStyles.boldLabel);
        myString = EditorGUILayout.TextField("Text Field", myString);
    }
}