mirror of
https://github.com/swift-project/pilotclient.git
synced 2026-04-01 05:26:45 +08:00
102 lines
4.1 KiB
C++
102 lines
4.1 KiB
C++
/* Copyright (C) 2015
|
|
* swift project Community / Contributors
|
|
*
|
|
* This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
|
|
* directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
|
|
* including this file, may be copied, modified, propagated, or distributed except according to the terms
|
|
* contained in the LICENSE file.
|
|
*/
|
|
|
|
//! \file
|
|
|
|
#ifndef BLACKMISC_VALUECACHE_PRIVATE_H
|
|
#define BLACKMISC_VALUECACHE_PRIVATE_H
|
|
|
|
#include "blackmisc/variantmap.h"
|
|
#include "blackmisc/statusmessage.h"
|
|
#include <QObject>
|
|
#include <QMutex>
|
|
#include <QMap>
|
|
|
|
namespace BlackMisc
|
|
{
|
|
class CIdentifier;
|
|
class CValueCache;
|
|
|
|
namespace Private
|
|
{
|
|
|
|
/*!
|
|
* \private QObject subclass used by CCached<T> class template for signal/slot communication with CValueCache.
|
|
* An instance of this class is shared between all CCached<T> referring to the same CValueCache and owned by the same QObject,
|
|
* with the latter QObject becoming parent of this instance.
|
|
*/
|
|
class BLACKMISC_EXPORT CValuePage : public QObject
|
|
{
|
|
Q_OBJECT
|
|
|
|
public:
|
|
//! Returns a CValuePage owned by the parent and connected to the cache, creating one if it doesn't exist.
|
|
static CValuePage &getPageFor(QObject *parent, CValueCache *cache);
|
|
|
|
//! Opaque type holding the state of one value in the page.
|
|
struct Element;
|
|
|
|
//! Functor used for validating values.
|
|
using Validator = std::function<bool(const CVariant &)>;
|
|
|
|
//! Pointer-to-member-function type of slot to notify parent of changes.
|
|
using NotifySlot = void (QObject:: *)();
|
|
|
|
//! Returns a new instance of the opaque Element type for use by CCached<T> to interact with CValuePage.
|
|
//! \param key The key string of the value in the cache.
|
|
//! \param metaType The Qt metatype ID of the value object's expected type.
|
|
//! \param validator Optional functor which returns true if the value is valid.
|
|
//! \param defaultValue Optional value which is used in case the value is invalid.
|
|
//! \param slot Optional member function of parent, will be called when value changes.
|
|
Element &createElement(const QString &key, int metaType, Validator validator, const CVariant &defaultValue, NotifySlot slot);
|
|
|
|
//! Read the currently paged value corresponding to the element's key.
|
|
const CVariant &getValue(const Element &element) const;
|
|
|
|
//! Write the value corresponding to the element's key and begin synchronizing it to any other pages.
|
|
CStatusMessage setValue(Element &element, const CVariant &value);
|
|
|
|
//! Synchronize with a change caused by another page.
|
|
//! Connected to signal CValueCache::valuesChanged.
|
|
//! \param values The new values.
|
|
//! \param changedBy Pointer to the CValuePage which caused the change. Null if it was changed by another process.
|
|
void setValuesFromCache(const BlackMisc::CVariantMap &values, QObject *changedBy);
|
|
|
|
//! Put this page into batching mode.
|
|
void beginBatch();
|
|
|
|
//! Take this page out of batching mode and discard changes.
|
|
void abandonBatch();
|
|
|
|
//! Take this page out of batching mode and apply changes.
|
|
void endBatch();
|
|
|
|
signals:
|
|
//! Synchronize this page's changes to other pages.
|
|
//! Connected to slot CValueCache::changeValues.
|
|
void valuesWantToCache(const BlackMisc::CVariantMap &values);
|
|
|
|
private:
|
|
using ElementPtr = QSharedPointer<Element>; // QMap doesn't support move-only types
|
|
|
|
CValueCache *m_cache = nullptr;
|
|
QMap<QString, ElementPtr> m_elements;
|
|
int m_batchMode = 0;
|
|
CVariantMap m_batchedValues;
|
|
|
|
CValuePage(QObject *parent, CValueCache *cache);
|
|
CStatusMessage validate(const Element &element, const CVariant &value) const;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
} // namespace
|
|
|
|
#endif
|