022891bcd8
And mention the example in the bindable properties docs. Pick-to: 6.2 Task-number: QTBUG-97655 Change-Id: I676e90dbda66c2e718c7f6c2240fac608a8653df Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io> Reviewed-by: Ivan Solovev <ivan.solovev@qt.io> Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
127 lines
3.7 KiB
C++
127 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2021 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "subscription.h"
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#include "user.h"
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Subscription::Subscription(User *user) : m_user(user)
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{
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Q_ASSERT(user);
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}
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//! [calculate-price]
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void Subscription::calculatePrice()
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{
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const auto oldPrice = m_price;
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m_price = qRound(calculateDiscount() * m_duration * basePrice());
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if (m_price != oldPrice)
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emit priceChanged();
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}
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//! [calculate-price]
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//! [set-duration]
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void Subscription::setDuration(Duration newDuration)
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{
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if (newDuration != m_duration) {
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m_duration = newDuration;
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calculatePrice();
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emit durationChanged();
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}
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}
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//! [set-duration]
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//! [calculate-discount]
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double Subscription::calculateDiscount() const
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{
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switch (m_duration) {
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case Monthly:
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return 1;
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case Quarterly:
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return 0.9;
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case Yearly:
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return 0.6;
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}
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Q_ASSERT(false);
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return -1;
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}
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//! [calculate-discount]
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//! [calculate-base-price]
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int Subscription::basePrice() const
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{
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if (m_user->country() == User::None)
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return 0;
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return (m_user->country() == User::Norway) ? 100 : 80;
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}
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//! [calculate-base-price]
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//! [update-validity]
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void Subscription::updateValidity()
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{
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bool isValid = m_isValid;
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m_isValid = m_user->country() != User::None && m_user->age() > 12;
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if (m_isValid != isValid)
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emit isValidChanged();
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}
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//! [update-validity]
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