Qt: Support binding controller axes

src/duckstation-qt/portsettingswidget.cpp

@@ -77,15 +77,15 @@ void PortSettingsWidget::createPortBindingSettingsUi(int index, PortSettingsUI*
   layout->setContentsMargins(0, 0, 0, 0);
   const auto buttons = Controller::GetButtonNames(ctype);
 
+  int start_row = 0;
   if (!buttons.empty())
   {
     QFrame* line = new QFrame(container);
     line->setFrameShape(QFrame::HLine);
     line->setFrameShadow(QFrame::Sunken);
-    layout->addWidget(line, 0, 0, 1, 4);
+    layout->addWidget(line, start_row++, 0, 1, 4);
-    layout->addWidget(new QLabel(tr("Button Bindings:"), container), 1, 0, 1, 4);
+    layout->addWidget(new QLabel(tr("Button Bindings:"), container), start_row++, 0, 1, 4);
 
-    const int start_row = 2;
     const int num_rows = (static_cast<int>(buttons.size()) + 1) / 2;
     int current_row = 0;
     int current_column = 0;
@@ -106,6 +106,41 @@ void PortSettingsWidget::createPortBindingSettingsUi(int index, PortSettingsUI*
 
       current_row++;
     }
+
+    start_row += num_rows;
+  }
+
+  const auto axises = Controller::GetAxisNames(ctype);
+  if (!axises.empty())
+  {
+    QFrame* line = new QFrame(container);
+    line->setFrameShape(QFrame::HLine);
+    line->setFrameShadow(QFrame::Sunken);
+    layout->addWidget(line, start_row++, 0, 1, 4);
+    layout->addWidget(new QLabel(tr("Axis Bindings:"), container), start_row++, 0, 1, 4);
+
+    const int num_rows = (static_cast<int>(axises.size()) + 1) / 2;
+    int current_row = 0;
+    int current_column = 0;
+    for (const auto& [axis_name, axis_code] : axises)
+    {
+      if (current_row == num_rows)
+      {
+        current_row = 0;
+        current_column += 2;
+      }
+
+      const QString axis_name_q = QString::fromStdString(axis_name);
+      const QString setting_name = QStringLiteral("Controller%1/Axis%2").arg(index + 1).arg(axis_name_q);
+      QLabel* label = new QLabel(axis_name_q, container);
+      InputAxisBindingWidget* button = new InputAxisBindingWidget(m_host_interface, setting_name, container);
+      layout->addWidget(label, start_row + current_row, current_column);
+      layout->addWidget(button, start_row + current_row, current_column + 1);
+
+      current_row++;
+    }
+
+    start_row += num_rows;
   }
 
   if (ui->button_binding_container)

src/duckstation-qt/qthostinterface.cpp

@@ -391,6 +391,27 @@ void QtHostInterface::updateControllerInputMap()
           controller->SetButtonState(button_code, pressed);
       });
     }
+
+    const auto axis_names = Controller::GetAxisNames(ctype);
+    for (const auto& it : axis_names)
+    {
+      const std::string& axis_name = it.first;
+      const s32 axis_code = it.second;
+
+      QVariant var = m_qsettings.value(
+        QStringLiteral("Controller%1/Axis%2").arg(controller_index + 1).arg(QString::fromStdString(axis_name)));
+      if (!var.isValid())
+        continue;
+
+      addAxisToInputMap(var.toString(), [this, controller_index, axis_code](float value) {
+        if (!m_system)
+          return;
+
+        Controller* controller = m_system->GetController(controller_index);
+        if (controller)
+          controller->SetAxisState(axis_code, value);
+      });
+    }
   }
 }
 
@@ -505,12 +526,12 @@ void QtHostInterface::addButtonToInputMap(const QString& binding, InputButtonHan
   {
     bool controller_index_okay;
     const int controller_index = device.mid(10).toInt(&controller_index_okay);
-
     if (!controller_index_okay || controller_index < 0)
     {
       qWarning() << "Malformed controller binding: " << binding;
       return;
     }
+
     if (button.startsWith(QStringLiteral("Button")))
     {
       bool button_index_okay;
@@ -540,6 +561,38 @@ void QtHostInterface::addButtonToInputMap(const QString& binding, InputButtonHan
   }
 }
 
+void QtHostInterface::addAxisToInputMap(const QString& binding, InputAxisHandler handler)
+{
+  const QString device = binding.section('/', 0, 0);
+  const QString axis = binding.section('/', 1, 1);
+  if (device.startsWith(QStringLiteral("Controller")))
+  {
+    bool controller_index_okay;
+    const int controller_index = device.mid(10).toInt(&controller_index_okay);
+    if (!controller_index_okay || controller_index < 0)
+    {
+      qWarning() << "Malformed controller binding: " << binding;
+      return;
+    }
+
+    if (axis.startsWith(QStringLiteral("Axis")))
+    {
+      bool axis_index_okay;
+      const int axis_index = axis.mid(4).toInt(&axis_index_okay);
+      if (!axis_index_okay ||
+          !g_sdl_controller_interface.BindControllerAxis(controller_index, axis_index, std::move(handler)))
+      {
+        qWarning() << "Failed to bind " << binding;
+      }
+    }
+  }
+  else
+  {
+    qWarning() << "Unknown input device: " << binding;
+    return;
+  }
+}
+
 void QtHostInterface::powerOffSystem()
 {
   if (!isOnWorkerThread())

src/duckstation-qt/qthostinterface.h

@@ -124,6 +124,7 @@ private:
   };
 
   using InputButtonHandler = std::function<void(bool)>;
+  using InputAxisHandler = std::function<void(float)>;
 
   class Thread : public QThread
   {
@@ -146,6 +147,7 @@ private:
   void updateControllerInputMap();
   void updateHotkeyInputMap();
   void addButtonToInputMap(const QString& binding, InputButtonHandler handler);
+  void addAxisToInputMap(const QString& binding, InputAxisHandler handler);
   void createThread();
   void stopThread();
   void threadEntryPoint();