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87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
/* Ricochet - https://ricochet.im/
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* Copyright (C) 2014, John Brooks <john.brooks@dereferenced.net>
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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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*
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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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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the names of the copyright owners nor the names of its
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* contributors may be used to endorse or promote products derived from
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* 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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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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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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#ifndef PENDINGOPERATION_H
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#define PENDINGOPERATION_H
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#include <QObject>
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/* Represents an asynchronous operation for reporting status
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*
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* This class is used for asynchronous operations that report a
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* status and errors when finished, particularly for exposing them
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* to QML.
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*
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* Subclass PendingOperation to implement your operation's logic.
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* You also need to handle the object's lifetime, for example by
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* calling deleteLater() when finished() is emitted.
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*
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* PendingOperation will emit finished() and one of success() or
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* error() when completed.
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*/
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class PendingOperation : public QObject
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{
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Q_OBJECT
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Q_PROPERTY(bool isFinished READ isFinished NOTIFY finished FINAL)
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Q_PROPERTY(bool isSuccess READ isSuccess NOTIFY success FINAL)
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Q_PROPERTY(bool isError READ isError NOTIFY error FINAL)
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Q_PROPERTY(QString errorMessage READ errorMessage NOTIFY finished FINAL)
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public:
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PendingOperation(QObject *parent = 0);
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bool isFinished() const;
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bool isSuccess() const;
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bool isError() const;
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QString errorMessage() const;
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signals:
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// Always emitted once when finished, regardless of status
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void finished();
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// One of error() or success() is emitted once
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void error(const QString &errorMessage);
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void success();
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protected slots:
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void finishWithError(const QString &errorMessage);
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void finishWithSuccess();
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private:
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bool m_finished;
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QString m_errorMessage;
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};
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Q_DECLARE_METATYPE(PendingOperation*)
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#endif
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