Differential D27840 Diff 80305 src/qmlcontrols/kcmcontrols/settingstateproxy.cpp

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src/qmlcontrols/kcmcontrols/settingstateproxy.cpp

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		1		/*
		2		* Copyright 2020 Kevin Ottens <kevin.ottens@enioka.com>
		3		*
		4		* This library is free software; you can redistribute it and/or
		5		* modify it under the terms of the GNU Library General Public
		6		* License as published by the Free Software Foundation; either
		7		* version 2 of the License, or (at your option) any later version.
		8		*
		9		* This library is distributed in the hope that it will be useful,
		10		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		11		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		12		* Library General Public License for more details.
		13		*
		14		* You should have received a copy of the GNU Library General Public License
		15		* along with this library; see the file COPYING.LIB. If not, write to
		16		* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
		17		* Boston, MA 02110-1301, USA.
		18		*/
		19
		20		#include "settingstateproxy.h"
		21
		22		#include <QDebug>
		23		#include <QMetaMethod>
		24
		25		KCoreConfigSkeleton *SettingStateProxy::configObject() const
		26		{
		27		return m_configObject;
		28		}
		29
		30		void SettingStateProxy::setConfigObject(KCoreConfigSkeleton *configObject)
		31		{
		32		if (m_configObject == configObject) {
		33		return;
		34		}
		35
		36		if (m_configObject) {
		37		m_configObject->disconnect(this);
		38		}
		39
		40		m_configObject = configObject;
		41		emit configObjectChanged();
		42		updateState();
		43		connectSetting();
		44		}
		45
		46		QString SettingStateProxy::itemName() const
		47		{
		48		return m_itemName;
		49		}
		50
		51		void SettingStateProxy::setItemName(const QString &itemName)
		52		{
		53		if (m_itemName == itemName) {
		54		return;
		55		}
		56
		57		if (m_configObject) {
		58		m_configObject->disconnect(this);
		59		}
		60
		61		m_itemName = itemName;
		62		emit itemNameChanged();
		63		updateState();
		64		connectSetting();
		65		}
		66
		67		bool SettingStateProxy::isImmutable() const
		68		{
		69		return m_immutable;
		70		}
		71
		72		bool SettingStateProxy::isDefaulted() const
		73		{
		74		return m_defaulted;
		75		}
		76
		77		void SettingStateProxy::resetToDefault()
		78		{
		79		const auto item = m_configObject ? m_configObject->findItem(m_itemName) : nullptr;
		80		if (item) {
		81		item->setDefault();
		82		}
		83		}
		84
		85		void SettingStateProxy::updateState()
		86		{
		87		const auto item = m_configObject ? m_configObject->findItem(m_itemName) : nullptr;
		88		const auto immutable = item ? item->isImmutable() : false;
		89		const auto defaulted = item ? item->isDefault() : true;
		90
		91		if (m_immutable != immutable) {
		92		m_immutable = immutable;
		93		emit immutableChanged();
		94		}
		95
		96		if (m_defaulted != defaulted) {
		97		m_defaulted = defaulted;
		98		emit defaultedChanged();
		99		}
		100		}
		101
		102		void SettingStateProxy::connectSetting()
		103		{
		104		const auto item = m_configObject ? m_configObject->findItem(m_itemName) : nullptr;
		105		if (!item) {
		106		return;
		107		}
		108
		109		const auto updateStateSlotIndex = metaObject()->indexOfMethod("updateState()");
		110		Q_ASSERT(updateStateSlotIndex >= 0);
		111		const auto updateStateSlot = metaObject()->method(updateStateSlotIndex);
		112		Q_ASSERT(updateStateSlot.isValid());
		113
		114		const auto itemHasSignals = dynamic_cast<KConfigCompilerSignallingItem>(item) \|\| dynamic_cast<KPropertySkeletonItem>(item);
		115		if (!itemHasSignals) {
		116		qWarning() << "Attempting to use SettingStateProxy with a non signalling item:" << m_itemName;
		117		return;
		118		}
		119
		120		const auto propertyName = [this] {
		121		auto name = m_itemName;
		122		if (name.at(0).isUpper()) {
		123		name[0] = name[0].toLower();
		124		}
		125		return name.toUtf8();
		126		}();
		127
		128		const auto metaObject = m_configObject->metaObject();
		129		const auto propertyIndex = metaObject->indexOfProperty(propertyName.constData());
		130		Q_ASSERT(propertyIndex >= 0);
		131		const auto property = metaObject->property(propertyIndex);
		132		Q_ASSERT(property.isValid());
		133		if (!property.hasNotifySignal()) {
		134		qWarning() << "Attempting to use SettingStateProxy with a non notifying property:" << propertyName;
		135		return;
		136		}
		137
		138		const auto changedSignal = property.notifySignal();
		139		Q_ASSERT(changedSignal.isValid());
		140		connect(m_configObject, changedSignal, this, updateStateSlot);
		141		connect(m_configObject, &KCoreConfigSkeleton::configChanged,
		142		this, &SettingStateProxy::updateState);
		143		}