Allow background use for gamepad input

Author: ZacharyPL

SerialPrograms/Source/NintendoSwitch/Framework/UI/NintendoSwitch_CommandRow.cpp

@@ -177,19 +177,23 @@ CommandRow::CommandRow(
     }
 #endif
 
-    m_session.add_listener(*this);
-    m_controller.add_listener(*this);
-//    global_input_add_listener(*this);
-}
+    m_session.add_listener(*this);
+    m_controller.add_listener(*this);
+    global_input_add_listener(*this);
+}
 
 
 bool CommandRow::allow_controller_input() const{
     return m_allow_commands_while_running || m_last_known_state == ProgramState::STOPPED;
 }
 void CommandRow::run_controller_input(ControllerInputState& state){
-    if (!m_last_known_focus){
-        m_controller.logger().log("Input Command Suppressed: Not in focus.", COLOR_RED);
-        return;
+    const bool is_keyboard = state.type() == ControllerInputType::HID_Keyboard;
+    if (is_keyboard && !m_last_known_focus){
+        // Allow neutral keyboard states through so held keys are released on focus changes.
+        if (!state.is_neutral()){
+            m_controller.logger().log("Keyboard Input Suppressed: Not in focus.", COLOR_RED);
+            return;
+        }
     }
     AbstractController* controller = m_controller.controller();
     if (controller == nullptr){
@@ -202,28 +206,15 @@ void CommandRow::run_controller_input(ControllerInputState& state){
     }
     controller->run_controller_input(state);
 }
-void CommandRow::set_focus(bool focused){
-    if (focused){
-        global_input_add_listener(*this);
-        if (allow_controller_input()){
-        }
-    }else{
-        global_input_clear_state();
-        global_input_remove_listener(*this);
-
-        AbstractController* controller = m_controller.controller();
-        if (controller != nullptr && allow_controller_input()){
-            try{
-                controller->cancel_all_commands();
-            }catch (InvalidConnectionStateException&){
-            }catch (OperationCancelledException&){
-            }
-        }
-    }
-    if (m_last_known_focus == focused){
-        return;
-    }
-    m_last_known_focus = focused;
+void CommandRow::set_focus(bool focused){
+    if (!focused){
+        // Keep gamepad input alive in the background. Only clear keyboard state.
+        global_keyboard_tracker().clear_state();
+    }
+    if (m_last_known_focus == focused){
+        return;
+    }
+    m_last_known_focus = focused;
     update_ui();
 }