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Qt Quick Ultralite摩托车仪表盘演示
/****************************************************************************** ** ** Copyright (C) 2020 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Quick Ultralite module. ** ** $QT_BEGIN_LICENSE:COMM$ ** ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see http://www.qt.io/terms-conditions. For further ** information use the contact form at http://www.qt.io/contact-us. ** ** $QT_END_LICENSE$ ** ******************************************************************************/import QtQuick 2.0 Item { id: root opacity: 0 property bool active: false property int welcomeAnimationDuration: 500 property int welcomeAnimationDelay: 0 onActiveChanged: { if(active) { showAnimation.start() } else { hideAnimation.start() } } SequentialAnimation { id: showAnimation PauseAnimation { duration: root.welcomeAnimationDelay } NumberAnimation { target: root property: "opacity" duration: root.welcomeAnimationDuration to: 1 } } NumberAnimation { id: hideAnimation target: root property: "opacity" duration: root.welcomeAnimationDuration to: 0 } }