UI: cleanup OffroadHome layout (#28284)

selfdrive/ui/qt/home.cc

@@ -130,27 +130,29 @@ OffroadHome::OffroadHome(QWidget* parent) : QFrame(parent) {
   main_layout->addSpacing(25);
   center_layout = new QStackedLayout();
 
-  // Vertical experimental button and drive stats layout
-  QWidget* statsAndExperimentalModeButtonWidget = new QWidget(this);
-  QVBoxLayout* statsAndExperimentalModeButton = new QVBoxLayout(statsAndExperimentalModeButtonWidget);
-  statsAndExperimentalModeButton->setSpacing(30);
-  statsAndExperimentalModeButton->setMargin(0);
-
-  ExperimentalModeButton *experimental_mode = new ExperimentalModeButton(this);
-  QObject::connect(experimental_mode, &ExperimentalModeButton::openSettings, this, &OffroadHome::openSettings);
-
-  statsAndExperimentalModeButton->addWidget(experimental_mode, 1);
-  statsAndExperimentalModeButton->addWidget(new DriveStats, 1);
-
-  // Horizontal experimental + drive stats and setup widget
-  QWidget* statsAndSetupWidget = new QWidget(this);
-  QHBoxLayout* statsAndSetup = new QHBoxLayout(statsAndSetupWidget);
-  statsAndSetup->setMargin(0);
-  statsAndSetup->setSpacing(30);
-  statsAndSetup->addWidget(statsAndExperimentalModeButtonWidget, 1);
-  statsAndSetup->addWidget(new SetupWidget);
-
-  center_layout->addWidget(statsAndSetupWidget);
+  QWidget *home_widget = new QWidget(this);
+  {
+    QHBoxLayout *home_layout = new QHBoxLayout(home_widget);
+    home_layout->setContentsMargins(0, 0, 0, 0);
+    home_layout->setSpacing(30);
+
+    // left: ExperimentalModeButton, DriveStats
+    QWidget* left_widget = new QWidget(this);
+    QVBoxLayout* left_column = new QVBoxLayout(left_widget);
+    left_column->setContentsMargins(0, 0, 0, 0);
+    left_column->setSpacing(30);
+
+    ExperimentalModeButton *experimental_mode = new ExperimentalModeButton(this);
+    QObject::connect(experimental_mode, &ExperimentalModeButton::openSettings, this, &OffroadHome::openSettings);
+    left_column->addWidget(experimental_mode, 1);
+    left_column->addWidget(new DriveStats, 1);
+
+    home_layout->addWidget(left_widget, 1);
+
+    // right: SetupWidget
+    home_layout->addWidget(new SetupWidget);
+  }
+  center_layout->addWidget(home_widget);
 
   // add update & alerts widgets
   update_widget = new UpdateAlert();