69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
/*
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* Copyright (C) 2015 Jolla Ltd.
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* Contact: Slava Monich <slava.monich@jolla.com>
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*
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* You may use this file under the terms of the BSD license 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
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* are 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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* * 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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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Nemo Mobile nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* 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 BOOKS_LOADING_PROPERTY_H
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#define BOOKS_LOADING_PROPERTY_H
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#include "BooksTypes.h"
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class BooksLoadingSignalBlocker;
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class BooksLoadingProperty
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{
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friend class BooksLoadingSignalBlocker;
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public:
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BooksLoadingProperty() : iChangesBlocked(0), iSavedState(false) {}
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virtual bool loading() const = 0;
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virtual void loadingChanged() = 0;
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private:
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void suspendLoadingStateChanges();
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void resumeLoadingStateChanges();
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int iChangesBlocked;
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bool iSavedState;
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};
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class BooksLoadingSignalBlocker {
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public:
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BooksLoadingSignalBlocker(BooksLoadingProperty* aProperty) : iProperty(aProperty)
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{ iProperty->suspendLoadingStateChanges(); }
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~BooksLoadingSignalBlocker()
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{ iProperty->resumeLoadingStateChanges(); }
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private:
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BooksLoadingProperty* iProperty;
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};
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#endif // BOOKS_LOADING_PROPERTY_H
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