24 lines
689 B
C++
24 lines
689 B
C++
#pragma once
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#include <QtGlobal>
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// 界面负责取得当前时间，模型只负责计算；测试可传入确定的毫秒数。
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class Countdown {
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public:
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enum class State { Ready, Running, Paused, Finished };
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explicit Countdown(qint64 durationMs = 300000);
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bool setDuration(qint64 durationMs);
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void start(qint64 nowMs);
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void pause(qint64 nowMs);
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void reset();
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void update(qint64 nowMs);
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qint64 remaining(qint64 nowMs) const;
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qint64 duration() const { return m_duration; }
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State state() const { return m_state; }
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private:
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qint64 m_duration;
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qint64 m_remainingAtStart;
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qint64 m_segmentStarted = 0;
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State m_state = State::Ready;
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};
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