C
Telltales: Rendering Safety-Critical UI
// Copyright (C) 2023 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial // This file is part of the Qt Safe Renderer module /* Purpose of this example is to enable development of Qt Safe Renderer in desktop environment (Windows and Linux). Note that this example is NOT implemented according Misra C++ 2008 nor ISO26262 functional safety standards and it depends on Qt classes. You should not use this example in production environment. */ #include <QtSafeRenderer/qsafelayout.h> #include <QtSafeRenderer/qsafelayoutresourcereader.h> #include <QtSafeRenderer/statemanager.h> #include <QtSafeRenderer/qsafechecksum.h> #include "safewindow.h" #include "eventhandler.h" using namespace SafeRenderer; //Global pointer to access the EventHandler from the filterFunction. EventHandler *g_msgHandler = NULL; static bool handleHeartbeatEvent(const QSafeEvent &event) { bool eventHandled = false; //Handle EventHeartbeatTimeout event if ((g_msgHandler != NULL) && (EventHeartbeatTimeout == event.getEventId())) { eventHandled = true; QSafeEventHeartbeatTimeout timeout(event); bool showNotif = timeout.getValue(); //Show or hide the error notification. QSafeEventVisibility notification; notification.setItemId(qsafe_hash_string("safeText")); notification.setValue(showNotif); g_msgHandler->processEvent(notification); } return eventHandled; } static void hideIcons(StateManager &stateManager, QSafeLayout &layout) { for (quint32 i=0; i<layout.count(); i++) { if (layout.item(i).id() == qsafe_hash_string("speedText") ) { continue; } else if (layout.item(i).id() == qsafe_hash_string("turnleft") || layout.item(i).id() == qsafe_hash_string("turnright") ) { QSafeEventChangeState changeState; changeState.setItemId(layout.item(i).id()); changeState.setStateId(qsafe_hash_string("hidden")); stateManager.handleEvent(changeState); } else { QSafeEventVisibility hideItem; hideItem.setItemId(layout.item(i).id()); hideItem.setValue(0U); stateManager.handleEvent(hideItem); } } } int main(int argc, char **argv) { (void)argc; (void)argv; static QSafeLayoutResourceReader hybrid("/layoutData/DashboardForm/DashboardForm.ui.srl"); static QSafeLayoutResourceReader sport("/layoutData/DashboardSportForm/DashboardSportForm.ui.srl"); hybrid.setLayoutId(qsafe_hash_string("hybrid")); sport.setLayoutId(qsafe_hash_string("sport")); SafeWindow telltaleWindow(hybrid.size(), QSafePoint(0U, 0U)); static SafeRenderer::StateManager stateManager(telltaleWindow, hybrid); stateManager.addLayout(&sport); hideIcons(stateManager, hybrid); telltaleWindow.requestUpdate(); static EventHandler msgHandler(stateManager, telltaleWindow); g_msgHandler = &msgHandler; msgHandler.installEventFilter(&handleHeartbeatEvent); msgHandler.handleEvents(); return 0; }