State Machines
/* state-machine.qml This file is part of GammaRay, the Qt application inspection and manipulation tool. Copyright (C) 2016-2020 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com Author: Volker Krause <volker.krause@kdab.com> Licensees holding valid commercial KDAB GammaRay licenses may use this file in accordance with GammaRay Commercial License Agreement provided with the Software. Contact info@kdab.com if any conditions of this licensing are not clear to you. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ import QtQuick 2.5 import QtQuick.Window 2.0 import QtQml.StateMachine 1.0 Rectangle { width: 120 height: 4*width color: "lightsteelblue" Rectangle { id: brokenTrafficLight color: "black" width: parent.width height: 3*width Column { anchors.fill: parent anchors.margins: spacing spacing: 5 Rectangle { id: redLight color: red.active || redToGreen.active ? "red" : "gray" anchors.left: parent.left anchors.right: parent.right height: width radius: width/2 } Rectangle { id: yellowLight color: redToGreen.active || greenToRed.active ? "yellow" : "gray" anchors.left: parent.left anchors.right: parent.right height: width radius: width/2 } Rectangle { id: greenLight color: green.active ? "green" : "gray" anchors.left: parent.left anchors.right: parent.right height: width radius: width/2 } } } Rectangle { id: stand color: brokenTrafficLight.color width: brokenTrafficLight.width / 3 anchors.top: brokenTrafficLight.bottom anchors.horizontalCenter: brokenTrafficLight.horizontalCenter anchors.bottom: parent.bottom Rectangle { id: buttonBase anchors.left: parent.left anchors.right: parent.right anchors.verticalCenter: parent.verticalCenter anchors.margins: 5 height: width color: "gray" MouseArea { id: onOffSwitch anchors.fill: parent } Rectangle { id: button color: "cyan" width: parent.width height: parent.height/2 y: off.active ? height : 0 } } } StateMachine { id: brokenTrafficLightMachine running: true initialState: running State { id: running initialState: red State { id: red TimeoutTransition { timeout: 5000 targetState: redToGreen } } State { id: redToGreen TimeoutTransition { timeout: 1500 targetState: green } } State { id: green TimeoutTransition { timeout: 5000 targetState: red } } State { id: greenToRed TimeoutTransition { timeout: 1500 targetState: red } } HistoryState { id: pause defaultState: red } SignalTransition { signal: onOffSwitch.clicked targetState: off } } State { id: off SignalTransition { signal: onOffSwitch.clicked targetState: pause } } } }