setup: add low voltage warning (#22342)

* setup: add low voltage warning

* read voltage

* fix path

selfdrive/assets/assets.qrc

@@ -7,6 +7,7 @@
   <file>img_eye_closed.svg</file>
   <file>offroad/icon_lock_closed.svg</file>
   <file>offroad/icon_checkmark.svg</file>
+  <file>offroad/icon_warning.png</file>
   <file>offroad/icon_wifi_strength_low.svg</file>
   <file>offroad/icon_wifi_strength_medium.svg</file>
   <file>offroad/icon_wifi_strength_high.svg</file>

selfdrive/ui/qt/setup/setup.cc

@@ -47,6 +47,56 @@ void Setup::download(QString url) {
   emit finished(true);
 }
 
+QWidget * Setup::low_voltage() {
+  QWidget *widget = new QWidget();
+  QVBoxLayout *main_layout = new QVBoxLayout(widget);
+  main_layout->setContentsMargins(55, 0, 55, 55);
+  main_layout->setSpacing(0);
+
+  // inner text layout: warning icon, title, and body
+  QVBoxLayout *inner_layout = new QVBoxLayout();
+  inner_layout->setContentsMargins(110, 144, 365, 0);
+  main_layout->addLayout(inner_layout);
+
+  QLabel *triangle = new QLabel();
+  triangle->setPixmap(QPixmap(ASSET_PATH + "offroad/icon_warning.png"));
+  inner_layout->addWidget(triangle, 0, Qt::AlignTop | Qt::AlignLeft);
+  inner_layout->addSpacing(80);
+
+  QLabel *title = new QLabel("WARNING: Low Voltage");
+  title->setStyleSheet("font-size: 90px; font-weight: 500; color: #FF594F;");
+  inner_layout->addWidget(title, 0, Qt::AlignTop | Qt::AlignLeft);
+
+  inner_layout->addSpacing(25);
+
+  QLabel *body = new QLabel("Power your device in a car with a harness or proceed at your own risk.");
+  body->setWordWrap(true);
+  body->setAlignment(Qt::AlignTop | Qt::AlignLeft);
+  body->setStyleSheet("font-size: 80px; font-weight: 300;");
+  inner_layout->addWidget(body);
+
+  inner_layout->addStretch();
+
+  // power off + continue buttons
+  QHBoxLayout *blayout = new QHBoxLayout();
+  blayout->setSpacing(50);
+  main_layout->addLayout(blayout, 0);
+
+  QPushButton *poweroff = new QPushButton("Power off");
+  poweroff->setObjectName("navBtn");
+  blayout->addWidget(poweroff);
+  QObject::connect(poweroff, &QPushButton::clicked, this, [=]() {
+    Hardware::poweroff();
+  });
+
+  QPushButton *cont = new QPushButton("Continue");
+  cont->setObjectName("navBtn");
+  blayout->addWidget(cont);
+  QObject::connect(cont, &QPushButton::clicked, this, &Setup::nextPage);
+
+  return widget;
+}
+
 QWidget * Setup::getting_started() {
   QWidget *widget = new QWidget();
 
@@ -306,6 +356,13 @@ void Setup::nextPage() {
 }
 
 Setup::Setup(QWidget *parent) : QStackedWidget(parent) {
+  std::stringstream buffer;
+  buffer << std::ifstream("/sys/class/hwmon/hwmon1/in1_input").rdbuf();
+  float voltage = (float)std::atoi(buffer.str().c_str()) / 1000.;
+  if (voltage < 7) {
+    addWidget(low_voltage());
+  }
+
   addWidget(getting_started());
   addWidget(network_setup());
   addWidget(software_selection());

selfdrive/ui/qt/setup/setup.h

@@ -11,6 +11,7 @@ public:
   explicit Setup(QWidget *parent = 0);
 
 private:
+  QWidget *low_voltage();
   QWidget *getting_started();
   QWidget *network_setup();
   QWidget *software_selection();