KCMUtils

settingstateproxy.cpp
1/*
2 SPDX-FileCopyrightText: 2020 Kevin Ottens <kevin.ottens@enioka.com>
3 SPDX-FileCopyrightText: 2020 Cyril Rossi <cyril.rossi@enioka.com>
4
5 SPDX-License-Identifier: LGPL-2.0-or-later
6*/
7
8#include "settingstateproxy.h"
9#include "kcmutils_debug.h"
10
11#include <QDebug>
12#include <QMetaMethod>
13
15{
16 return m_configObject;
17}
18
19void SettingStateProxy::setConfigObject(KCoreConfigSkeleton *configObject)
20{
21 if (m_configObject == configObject) {
22 return;
23 }
24
25 if (m_configObject) {
26 m_configObject->disconnect(this);
27 }
28
29 m_configObject = configObject;
30 Q_EMIT configObjectChanged();
31 updateState();
32 connectSetting();
33}
34
36{
37 return m_settingName;
38}
39
40void SettingStateProxy::setSettingName(const QString &settingName)
41{
42 if (m_settingName == settingName) {
43 return;
44 }
45
46 if (m_configObject) {
47 m_configObject->disconnect(this);
48 }
49
50 m_settingName = settingName;
51 Q_EMIT settingNameChanged();
52 updateState();
53 connectSetting();
54}
55
56bool SettingStateProxy::isImmutable() const
57{
58 return m_immutable;
59}
60
61bool SettingStateProxy::isDefaulted() const
62{
63 return m_defaulted;
64}
65
66void SettingStateProxy::updateState()
67{
68 const auto item = m_configObject ? m_configObject->findItem(m_settingName) : nullptr;
69 const auto immutable = item ? item->isImmutable() : false;
70 const auto defaulted = item ? item->isDefault() : true;
71
72 if (m_immutable != immutable) {
73 m_immutable = immutable;
74 Q_EMIT immutableChanged();
75 }
76
77 if (m_defaulted != defaulted) {
78 m_defaulted = defaulted;
79 Q_EMIT defaultedChanged();
80 }
81}
82
83void SettingStateProxy::connectSetting()
84{
85 const auto item = m_configObject ? m_configObject->findItem(m_settingName) : nullptr;
86 if (!item) {
87 return;
88 }
89
90 const auto updateStateSlotIndex = metaObject()->indexOfMethod("updateState()");
91 Q_ASSERT(updateStateSlotIndex >= 0);
92 const auto updateStateSlot = metaObject()->method(updateStateSlotIndex);
93 Q_ASSERT(updateStateSlot.isValid());
94
95 const auto itemHasSignals = dynamic_cast<KConfigCompilerSignallingItem *>(item) || dynamic_cast<KPropertySkeletonItem *>(item);
96 if (!itemHasSignals) {
97 qCWarning(KCMUTILS_LOG) << "Attempting to use SettingStateProxy with a non signalling item:" << m_settingName;
98 return;
99 }
100
101 const auto propertyName = [this] {
102 auto name = m_settingName;
103 if (name.at(0).isUpper()) {
104 name[0] = name[0].toLower();
105 }
106 return name.toUtf8();
107 }();
108
109 const auto metaObject = m_configObject->metaObject();
110 const auto propertyIndex = metaObject->indexOfProperty(propertyName.constData());
111 Q_ASSERT(propertyIndex >= 0);
112 const auto property = metaObject->property(propertyIndex);
113 Q_ASSERT(property.isValid());
114 if (!property.hasNotifySignal()) {
115 qCWarning(KCMUTILS_LOG) << "Attempting to use SettingStateProxy with a non notifying property:" << propertyName;
116 return;
117 }
118
119 const auto changedSignal = property.notifySignal();
120 Q_ASSERT(changedSignal.isValid());
121 connect(m_configObject, changedSignal, this, updateStateSlot);
122 connect(m_configObject, &KCoreConfigSkeleton::configChanged, this, &SettingStateProxy::updateState);
123}
124
125#include "moc_settingstateproxy.cpp"
QML_ELEMENTKCoreConfigSkeleton * configObject
The config object which will be monitored for setting state changes.
bool defaulted
Indicates if the setting differs from its default value.
QString settingName
The name of the setting in the config object.
bool immutable
Indicates if the setting is marked as immutable.
QString name(StandardAction id)
bool isUpper(char32_t ucs4)
int indexOfMethod(const char *method) const const
int indexOfProperty(const char *name) const const
QMetaMethod method(int index) const const
QMetaProperty property(int index) const const
Q_EMITQ_EMIT
QMetaObject::Connection connect(const QObject *sender, PointerToMemberFunction signal, Functor functor)
virtual const QMetaObject * metaObject() const const
QVariant property(const char *name) const const
const QChar at(qsizetype position) const const
QString toLower() const const
QByteArray toUtf8() const const
bool isValid() const const
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