From f67467f321622beb40e3665acb4cbc3c985db652 Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Sat, 24 Jul 2021 07:05:58 +0800
Subject: [PATCH] HomeWindow: fix background white flash while switching to
 onroad (#21695)

---
 selfdrive/ui/qt/home.cc   | 3 ++-
 selfdrive/ui/qt/window.cc | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/selfdrive/ui/qt/home.cc b/selfdrive/ui/qt/home.cc
index d8b837327b..9cc65675ba 100644
--- a/selfdrive/ui/qt/home.cc
+++ b/selfdrive/ui/qt/home.cc
@@ -39,6 +39,7 @@ HomeWindow::HomeWindow(QWidget* parent) : QWidget(parent) {
     showDriverView(false);
   });
   slayout->addWidget(driver_view);
+  setAttribute(Qt::WA_NoSystemBackground);
 }
 
 void HomeWindow::showSidebar(bool show) {
@@ -46,12 +47,12 @@ void HomeWindow::showSidebar(bool show) {
 }
 
 void HomeWindow::offroadTransition(bool offroad) {
+  sidebar->setVisible(offroad);
   if (offroad) {
     slayout->setCurrentWidget(home);
   } else {
     slayout->setCurrentWidget(onroad);
   }
-  sidebar->setVisible(offroad);
   emit offroadTransitionSignal(offroad);
 }
 
diff --git a/selfdrive/ui/qt/window.cc b/selfdrive/ui/qt/window.cc
index 04c50684b0..ee1a7edbb7 100644
--- a/selfdrive/ui/qt/window.cc
+++ b/selfdrive/ui/qt/window.cc
@@ -59,6 +59,7 @@ MainWindow::MainWindow(QWidget *parent) : QWidget(parent) {
       outline: none;
     }
   )");
+  setAttribute(Qt::WA_NoSystemBackground);
 }
 
 void MainWindow::openSettings() {