cee89e70a6
Added two examples for modeling a subscription service: signal/slot connection-based and bindable property-based. The examples are based on the example from Fabian's Qt WS talk about the bindable properties. Pick-to: 6.2 Task-number: QTBUG-97655 Change-Id: I0345913b8b6e5c40b8477e128d36483598bdfcaa Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Ivan Solovev <ivan.solovev@qt.io> Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
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**
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** Copyright (C) 2021 The Qt Company Ltd.
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** This file is part of the examples of the Qt Toolkit.
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****************************************************************************/
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#include "bindablesubscription.h"
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#include "bindableuser.h"
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BindableSubscription::BindableSubscription(BindableUser *user) : m_user(user)
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{
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Q_ASSERT(user);
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m_price.setBinding([this] { return qRound(calculateDiscount() * m_duration * basePrice()); });
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m_isValid.setBinding([this] {
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return m_user->country() != BindableUser::None && m_user->age() > 12;
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});
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}
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void BindableSubscription::setDuration(Duration newDuration)
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{
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m_duration = newDuration;
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}
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double BindableSubscription::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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int BindableSubscription::basePrice() const
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{
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if (m_user->country() == BindableUser::None)
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return 0;
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return (m_user->country() == BindableUser::Norway) ? 100 : 80;
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}
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