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/*
propertybinder.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2015 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Volker Krause <volker.krause@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#include "propertybinder.h"
#include <QDebug>
#include <QMetaProperty>
using namespace GammaRay;
PropertyBinder::PropertyBinder(QObject *source, QObject *destination)
: QObject(source)
, m_source(source)
, m_destination(destination)
, m_lock(false)
{
Q_ASSERT(source);
Q_ASSERT(destination);
}
PropertyBinder::PropertyBinder(QObject *source, const char *sourceProp, QObject *destination,
const char *destProp)
: QObject(source)
, m_source(source)
, m_destination(destination)
, m_lock(false)
{
Q_ASSERT(source);
Q_ASSERT(destination);
add(sourceProp, destProp);
syncSourceToDestination();
}
PropertyBinder::~PropertyBinder() = default;
void PropertyBinder::add(const char *sourceProp, const char *destProp)
{
Q_ASSERT(sourceProp);
Q_ASSERT(destProp);
Binding b;
const auto sourceIndex = m_source->metaObject()->indexOfProperty(sourceProp);
b.sourceProperty = m_source->metaObject()->property(sourceIndex);
Q_ASSERT(b.sourceProperty.isValid());
Q_ASSERT(b.sourceProperty.hasNotifySignal());
const QByteArray sig1 = QByteArray("2") + b.sourceProperty.notifySignal().methodSignature();
connect(m_source, sig1, this, SLOT(syncSourceToDestination()));
const auto destIndex = m_destination->metaObject()->indexOfProperty(destProp);
b.destinationProperty = m_destination->metaObject()->property(destIndex);
Q_ASSERT(b.destinationProperty.isValid());
Q_ASSERT(b.destinationProperty.isWritable());
m_properties.push_back(b);
// notification for reverse direction changes, if present
if (!b.destinationProperty.hasNotifySignal() || !b.sourceProperty.isWritable())
return;
const QByteArray sig2 = QByteArray("2") + b.destinationProperty.notifySignal().methodSignature();
connect(m_destination, sig2, this, SLOT(syncDestinationToSource()));
}
void PropertyBinder::syncSourceToDestination()
{
if (!m_destination || m_lock)
return;
m_lock = true;
for (const auto &b : std::as_const(m_properties))
b.destinationProperty.write(m_destination, b.sourceProperty.read(m_source));
m_lock = false;
}
void PropertyBinder::syncDestinationToSource()
{
if (m_lock)
return;
m_lock = true;
for (const auto &b : std::as_const(m_properties)) {
if (!b.sourceProperty.isWritable())
continue;
b.sourceProperty.write(m_source, b.destinationProperty.read(m_destination));
}
m_lock = false;
}
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