67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
// Copyright (C) 2024 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#ifndef STATECONTROLLER_H
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#define STATECONTROLLER_H
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#include <QObject>
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class StateController : public QObject
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{
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Q_OBJECT
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public:
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// _________
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// | |<-------------------------------------*
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// |InitState|<-------------------* |
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// |_________*----* _________ | |
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// | | | | setDirty(false) |
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// setDirty(true) *->|NewState *--* |
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// | |_________*---* |
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// | __________ | changesSaved() |
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// fileLoaded() *->| |<-* | fileClosed()
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// | |-------------------*
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// *--*OpenState |<------------------*
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// | | *-* |
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// fileLoaded() *->|__________* | |
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// | |
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// | ___________ | changesSaved()
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// | | | | or
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// setDirty(true) *->|DirtyState | | setDirty(false)
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// |___________*--*
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enum State {
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InitState,
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NewState,
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OpenState,
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DirtyState,
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};
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public:
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explicit StateController(QObject *parent = nullptr);
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State currentState() const { return m_currentState; }
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QString filePath() const { return m_filePath; }
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static StateController* instance();
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public slots:
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void setDirty(bool dirty);
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void changesSaved(const QString &filePath = {});
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void fileLoaded(const QString &filePath);
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void fileClosed();
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signals:
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void stateChanged(State from, State to);
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private:
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void setCurrentState(State state);
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void setFilePath(const QString &filePath = {}) { m_filePath = filePath; }
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private:
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State m_currentState = InitState;
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QString m_filePath;
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static inline StateController *s_instance = nullptr;
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};
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#endif // STATECONTROLLER_H
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