basic keyboard: release all keys on FocusOut event

rpcs3/Emu/Io/KeyboardHandler.cpp

@@ -186,3 +186,14 @@ void KeyboardHandlerBase::SetIntercepted(bool intercepted)
 		}
 	}
 }
+
+void KeyboardHandlerBase::ReleaseAllKeys()
+{
+	for (const Keyboard& keyboard : m_keyboards)
+	{
+		for (const KbButton& button : keyboard.m_buttons)
+		{
+			Key(button.m_keyCode, false);
+		}
+	}
+}

rpcs3/Emu/Io/KeyboardHandler.h

@@ -86,10 +86,6 @@ struct Keyboard
 
 class KeyboardHandlerBase
 {
-protected:
-	KbInfo m_info;
-	std::vector<Keyboard> m_keyboards;
-
 public:
 	std::mutex m_mutex;
 
@@ -109,4 +105,10 @@ public:
 	KbConfig& GetConfig(const u32 keyboard) { return m_keyboards[keyboard].m_config; }
 
 	stx::init_mutex init;
+
+protected:
+	void ReleaseAllKeys();
+
+	KbInfo m_info;
+	std::vector<Keyboard> m_keyboards;
 };

rpcs3/Input/basic_keyboard_handler.cpp

@@ -62,13 +62,27 @@ bool basic_keyboard_handler::eventFilter(QObject* watched, QEvent* event)
 	// !m_target->isVisible() is a hack since currently a guiless application will STILL inititialize a gsrender (providing a valid target)
 	if (!m_target || !m_target->isVisible() || watched == m_target)
 	{
-		if (event->type() == QEvent::KeyPress)
+		switch (event->type())
+		{
+		case QEvent::KeyPress:
 		{
 			keyPressEvent(static_cast<QKeyEvent*>(event));
+			break;
 		}
-		else if (event->type() == QEvent::KeyRelease)
+		case QEvent::KeyRelease:
 		{
 			keyReleaseEvent(static_cast<QKeyEvent*>(event));
+			break;
+		}
+		case QEvent::FocusOut:
+		{
+			ReleaseAllKeys();
+			break;
+		}
+		default:
+		{
+			break;
+		}
 		}
 	}
 	return false;