From d1ab02b5c9ad853f03bdfef3dafc90969ad85e45 Mon Sep 17 00:00:00 2001
From: Raphael Coeffic <raphael.coeffic@frafos.com>
Date: Tue, 6 Apr 2021 08:51:47 +0200
Subject: [PATCH] MainWindow is a singleton

This prevents double instantiation by design rather than by convention.
---
 radio/src/thirdparty/libopenui/src/mainwindow.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/radio/src/thirdparty/libopenui/src/mainwindow.h b/radio/src/thirdparty/libopenui/src/mainwindow.h
index 2b4368917..682d200ca 100644
--- a/radio/src/thirdparty/libopenui/src/mainwindow.h
+++ b/radio/src/thirdparty/libopenui/src/mainwindow.h
@@ -25,15 +25,16 @@
 
 class MainWindow: public Window
 {
-  public:
+    // singleton
     MainWindow():
       Window(nullptr, {0, 0, LCD_W, LCD_H}),
       invalidatedRect(rect)
     {
       Layer::push(this);
-      _instance = this;
     }
 
+  public:
+
     ~MainWindow() override
     {
       children.clear();
@@ -41,6 +42,9 @@ class MainWindow: public Window
 
     static MainWindow * instance()
     {
+      if (!_instance)
+        _instance = new MainWindow();
+
       return _instance;
     }