Utils: Rework aspect implementation

This avoids some repetition and could be a step towards
having type storage in (or rather accessible from) the base,
so we can have aspects for more complex data (treemodels...)
that are not easily converted to QVariant.

Change-Id: I9797b3d5646195705212db1830d2b415291ac651
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

30 files changed, 462 insertions, 642 deletions

diff --git a/src/libs/utils/aspects.cpp b/src/libs/utils/aspects.cpp
index d8fdd9f6f3..5c1fd5cdb2 100644
--- a/src/libs/utils/aspects.cpp
+++ b/src/libs/utils/aspects.cpp
@@ -40,8 +40,6 @@ class BaseAspectPrivate
 {
 public:
     Id m_id;
-    QVariant m_value;
-    QVariant m_defaultValue;
     std::function<QVariant(const QVariant &)> m_toSettings;
     std::function<QVariant(const QVariant &)> m_fromSettings;
 
@@ -99,7 +97,7 @@ BaseAspect::BaseAspect(AspectContainer *container)
 {
     if (container)
         container->registerAspect(this);
-    addDataExtractor(this, &BaseAspect::value, &Data::value);
+    addDataExtractor(this, &BaseAspect::variantValue, &Data::value);
 }
 
 /*!
@@ -120,43 +118,49 @@ void BaseAspect::setId(Id id)
     d->m_id = id;
 }
 
-QVariant BaseAspect::value() const
+QVariant BaseAspect::variantValue() const
 {
-    return d->m_value;
+    return {};
 }
 
 /*!
     Sets \a value.
 
-    Emits \c changed() if the value changed.
+    Prefer the typed setValue() of derived classes.
 */
-void BaseAspect::setValue(const QVariant &value)
+void BaseAspect::setVariantValue(const QVariant &value)
 {
-    if (setValueQuietly(value)) {
-        emit changed();
-        emitChangedValue();
-    }
+    Q_UNUSED(value)
+    QTC_CHECK(false);
+}
+
+void BaseAspect::setDefaultVariantValue(const QVariant &value)
+{
+    Q_UNUSED(value)
+    QTC_CHECK(false);
 }
 
 /*!
-    Sets \a value without emitting \c changed().
+    \internal
+
+    Sets \a value without emitting signals.
 
-    Returns whether the value changed.
+    Prefer the typed setValueQuietly() of derived classes.
 */
-bool BaseAspect::setValueQuietly(const QVariant &value)
+void BaseAspect::setVariantValueQuietly(const QVariant &value)
 {
-    if (d->m_value == value)
-        return false;
-    d->m_value = value;
-    return true;
+    Q_UNUSED(value)
+    QTC_CHECK(false);
 }
 
-QVariant BaseAspect::defaultValue() const
+QVariant BaseAspect::defaultVariantValue() const
 {
-    return d->m_defaultValue;
+    return {};
 }
 
 /*!
+    \fn TypedAspect::setDefaultValue(const ValueType &value)
+
     Sets a default \a value and the current value for this aspect.
 
     \note The current value will be set silently to the same value.
@@ -165,11 +169,6 @@ QVariant BaseAspect::defaultValue() const
 
     Default values will not be stored in settings.
 */
-void BaseAspect::setDefaultValue(const QVariant &value)
-{
-    d->m_defaultValue = value;
-    d->m_value = value;
-}
 
 void BaseAspect::setDisplayName(const QString &displayName)
 {
@@ -308,8 +307,12 @@ void BaseAspect::setEnabler(BoolAspect *checker)
 {
     QTC_ASSERT(checker, return);
     setEnabled(checker->value());
-    connect(checker, &BoolAspect::volatileValueChanged, this, &BaseAspect::setEnabled);
-    connect(checker, &BoolAspect::valueChanged, this, &BaseAspect::setEnabled);
+    connect(checker, &BoolAspect::volatileValueChanged, this, [this, checker] {
+        BaseAspect::setEnabled(checker->volatileValue());
+    });
+    connect(checker, &BoolAspect::changed, this, [this, checker] {
+        BaseAspect::setEnabled(checker->volatileValue());
+    });
 }
 
 bool BaseAspect::isReadOnly() const
@@ -442,16 +445,29 @@ void createItem(Layouting::LayoutItem *item, const BaseAspect *aspect)
 /*!
     Updates this aspect's value from user-initiated changes in the widget.
 
-    This has only an effect if \c isAutoApply is false.
+    Emits changed() if the value changed.
 */
 void BaseAspect::apply()
 {
-    QTC_CHECK(!d->m_autoApply);
-    if (isDirty())
-        setValue(volatileValue());
+    if (silentApply()) {
+        if (hasAction())
+            emit action()->triggered(variantValue().toBool());
+        emit changed();
+    }
 }
 
 /*!
+    Updates this aspect's value from user-initiated changes in the widget.
+
+    \returns whether the value changed. Does not emit signals.
+*/
+
+bool BaseAspect::silentApply()
+{
+    guiToInternal();
+    return internalToExternal();
+}
+/*!
     Discard user changes in the widget and restore widget contents from
     aspect's value.
 
@@ -459,9 +475,8 @@ void BaseAspect::apply()
 */
 void BaseAspect::cancel()
 {
-    QTC_CHECK(!d->m_autoApply);
-    if (!d->m_subWidgets.isEmpty())
-        setVolatileValue(d->m_value);
+    externalToInternal();
+    internalToGui();
 }
 
 void BaseAspect::finish()
@@ -476,24 +491,9 @@ bool BaseAspect::hasAction() const
     return d->m_action != nullptr;
 }
 
-bool BaseAspect::isDirty() const
+bool BaseAspect::isDirty()
 {
-    QTC_CHECK(!isAutoApply());
-    // Aspects that were never shown cannot contain unsaved user changes.
-    if (d->m_subWidgets.isEmpty())
-        return false;
-    return volatileValue() != d->m_value;
-}
-
-QVariant BaseAspect::volatileValue() const
-{
-    QTC_CHECK(!isAutoApply());
-    return {};
-}
-
-void BaseAspect::setVolatileValue(const QVariant &val)
-{
-    Q_UNUSED(val);
+    return false;
 }
 
 void BaseAspect::registerSubWidget(QWidget *widget)
@@ -534,8 +534,10 @@ void BaseAspect::saveToMap(QVariantMap &data, const QVariant &value,
 */
 void BaseAspect::fromMap(const QVariantMap &map)
 {
-    const QVariant val = map.value(settingsKey(), toSettingsValue(defaultValue()));
-    setValue(fromSettingsValue(val));
+    if (settingsKey().isEmpty())
+        return;
+    const QVariant val = map.value(settingsKey(), toSettingsValue(defaultVariantValue()));
+    setVariantValue(fromSettingsValue(val));
 }
 
 /*!
@@ -543,7 +545,9 @@ void BaseAspect::fromMap(const QVariantMap &map)
 */
 void BaseAspect::toMap(QVariantMap &map) const
 {
-    saveToMap(map, toSettingsValue(d->m_value), toSettingsValue(d->m_defaultValue), settingsKey());
+    if (settingsKey().isEmpty())
+        return;
+    saveToMap(map, toSettingsValue(variantValue()), toSettingsValue(defaultVariantValue()), settingsKey());
 }
 
 void BaseAspect::readSettings(const QSettings *settings)
@@ -551,7 +555,7 @@ void BaseAspect::readSettings(const QSettings *settings)
     if (settingsKey().isEmpty())
         return;
     const QVariant &val = settings->value(settingsKey());
-    setValue(val.isValid() ? fromSettingsValue(val) : defaultValue());
+    setVariantValue(val.isValid() ? fromSettingsValue(val) : defaultVariantValue());
 }
 
 void BaseAspect::writeSettings(QSettings *settings) const
@@ -560,8 +564,8 @@ void BaseAspect::writeSettings(QSettings *settings) const
         return;
     QtcSettings::setValueWithDefault(settings,
                                      settingsKey(),
-                                     toSettingsValue(value()),
-                                     toSettingsValue(defaultValue()));
+                                     toSettingsValue(variantValue()),
+                                     toSettingsValue(defaultVariantValue()));
 }
 
 void BaseAspect::setFromSettingsTransformation(const SavedValueTransformation &transform)
@@ -773,9 +777,8 @@ public:
  */
 
 StringAspect::StringAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::StringAspectPrivate)
+    : TypedAspect(container), d(new Internal::StringAspectPrivate)
 {
-    setDefaultValue(QString());
     setSpan(2, 1); // Default: Label + something
 
     addDataExtractor(this, &StringAspect::value, &Data::value);
@@ -800,7 +803,7 @@ void StringAspect::setValueAcceptor(StringAspect::ValueAcceptor &&acceptor)
 */
 QString StringAspect::value() const
 {
-    return BaseAspect::value().toString();
+    return TypedAspect::value();
 }
 
 /*!
@@ -816,27 +819,13 @@ void StringAspect::setValue(const QString &val)
     if (d->m_valueAcceptor) {
         const std::optional<QString> tmp = d->m_valueAcceptor(value(), val);
         if (!tmp) {
-            update(); // Make sure the original value is retained in the UI
+            internalToGui(); // Make sure the original value is retained in the UI
             return;
         }
         processedValue = tmp.value();
     }
 
-    if (BaseAspect::setValueQuietly(QVariant(processedValue))) {
-        update();
-        emit changed();
-        emit valueChanged(processedValue);
-    }
-}
-
-QString StringAspect::defaultValue() const
-{
-    return BaseAspect::defaultValue().toString();
-}
-
-void StringAspect::setDefaultValue(const QString &val)
-{
-    BaseAspect::setDefaultValue(val);
+    TypedAspect::setValue(processedValue);
 }
 
 /*!
@@ -845,7 +834,7 @@ void StringAspect::setDefaultValue(const QString &val)
 void StringAspect::fromMap(const QVariantMap &map)
 {
     if (!settingsKey().isEmpty())
-        BaseAspect::setValueQuietly(map.value(settingsKey(), defaultValue()));
+        setValueQuietly(map.value(settingsKey(), defaultValue()).toString());
     if (d->m_checker)
         d->m_checker->fromMap(map);
 }
@@ -900,7 +889,7 @@ PathChooser *StringAspect::pathChooser() const
 void StringAspect::setShowToolTipOnLabel(bool show)
 {
     d->m_showToolTipOnLabel = show;
-    update();
+    internalToGui();
 }
 
 /*!
@@ -1246,79 +1235,48 @@ void StringAspect::addToLayout(LayoutItem &parent)
         d->m_checker->addToLayout(parent);
 }
 
-QVariant StringAspect::volatileValue() const
-{
-    switch (d->m_displayStyle) {
-    case PathChooserDisplay:
-        QTC_ASSERT(d->m_pathChooserDisplay, return {});
-        if (d->m_pathChooserDisplay->filePath().isEmpty())
-            return defaultValue();
-        return d->m_pathChooserDisplay->filePath().toString();
-    case LineEditDisplay:
-        QTC_ASSERT(d->m_lineEditDisplay, return {});
-        if (d->m_lineEditDisplay->text().isEmpty())
-            return defaultValue();
-        return d->m_lineEditDisplay->text();
-    case TextEditDisplay:
-        QTC_ASSERT(d->m_textEditDisplay, return {});
-        if (d->m_textEditDisplay->document()->isEmpty())
-            return defaultValue();
-        return d->m_textEditDisplay->document()->toPlainText();
-    case LabelDisplay:
-        break;
-    }
-    return {};
-}
-
-void StringAspect::setVolatileValue(const QVariant &val)
+void StringAspect::guiToInternal()
 {
     switch (d->m_displayStyle) {
     case PathChooserDisplay:
         if (d->m_pathChooserDisplay)
-            d->m_pathChooserDisplay->setFilePath(FilePath::fromVariant(val));
+            m_internal = d->m_pathChooserDisplay->lineEdit()->text();
         break;
     case LineEditDisplay:
         if (d->m_lineEditDisplay)
-            d->m_lineEditDisplay->setText(val.toString());
+            m_internal = d->m_lineEditDisplay->text();
         break;
     case TextEditDisplay:
         if (d->m_textEditDisplay)
-            d->m_textEditDisplay->document()->setPlainText(val.toString());
-        break;
+            m_internal = d->m_textEditDisplay->document()->toPlainText();
     case LabelDisplay:
         break;
     }
 }
 
-void StringAspect::emitChangedValue()
-{
-    emit valueChanged(value());
-}
-
-void StringAspect::update()
+void StringAspect::internalToGui()
 {
-    const QString displayedString = d->m_displayFilter ? d->m_displayFilter(value()) : value();
-
+    const QString displayed = d->m_displayFilter ? d->m_displayFilter(m_internal) : m_internal;
     if (d->m_pathChooserDisplay) {
-        d->m_pathChooserDisplay->setFilePath(FilePath::fromUserInput(displayedString));
+        d->m_pathChooserDisplay->lineEdit()->setText(displayed);
         d->updateWidgetFromCheckStatus(this, d->m_pathChooserDisplay.data());
     }
 
     if (d->m_lineEditDisplay) {
-        d->m_lineEditDisplay->setTextKeepingActiveCursor(displayedString);
+        d->m_lineEditDisplay->setTextKeepingActiveCursor(displayed);
         d->updateWidgetFromCheckStatus(this, d->m_lineEditDisplay.data());
     }
 
     if (d->m_textEditDisplay) {
         const QString old = d->m_textEditDisplay->document()->toPlainText();
-        if (displayedString != old)
-            d->m_textEditDisplay->setText(displayedString);
+        if (displayed != old)
+            d->m_textEditDisplay->setText(displayed);
         d->updateWidgetFromCheckStatus(this, d->m_textEditDisplay.data());
     }
 
     if (d->m_labelDisplay) {
-        d->m_labelDisplay->setText(displayedString);
-        d->m_labelDisplay->setToolTip(d->m_showToolTipOnLabel ? displayedString : toolTip());
+        d->m_labelDisplay->setText(displayed);
+        d->m_labelDisplay->setToolTip(d->m_showToolTipOnLabel ? displayed : toolTip());
     }
 
     validateInput();
@@ -1342,11 +1300,11 @@ void StringAspect::makeCheckable(CheckBoxPlacement checkBoxPlacement,
                            : BoolAspect::LabelPlacement::AtCheckBox);
     d->m_checker->setSettingsKey(checkerKey);
 
-    connect(d->m_checker.get(), &BoolAspect::changed, this, &StringAspect::update);
+    connect(d->m_checker.get(), &BoolAspect::changed, this, &StringAspect::internalToGui);
     connect(d->m_checker.get(), &BoolAspect::changed, this, &StringAspect::changed);
     connect(d->m_checker.get(), &BoolAspect::changed, this, &StringAspect::checkedChanged);
 
-    update();
+    internalToGui();
 }
 
 
@@ -1384,12 +1342,10 @@ FilePathAspect::FilePathAspect(AspectContainer *container)
 */
 
 ColorAspect::ColorAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::ColorAspectPrivate)
+    : TypedAspect(container), d(new Internal::ColorAspectPrivate)
 {
     setDefaultValue(QColor::fromRgb(0, 0, 0));
     setSpan(1, 1);
-
-    addDataExtractor(this, &ColorAspect::value, &Data::value);
 }
 
 ColorAspect::~ColorAspect() = default;
@@ -1408,31 +1364,16 @@ void ColorAspect::addToLayout(Layouting::LayoutItem &parent)
     }
 }
 
-QColor ColorAspect::value() const
-{
-    return BaseAspect::value().value<QColor>();
-}
-
-void ColorAspect::setValue(const QColor &value)
-{
-    if (BaseAspect::setValueQuietly(value))
-        emit changed();
-}
-
-QVariant ColorAspect::volatileValue() const
+void ColorAspect::internalToGui()
 {
-    QTC_CHECK(!isAutoApply());
     if (d->m_colorButton)
-        return d->m_colorButton->color();
-    QTC_CHECK(false);
-    return {};
+        m_internal = d->m_colorButton->color();
 }
 
-void ColorAspect::setVolatileValue(const QVariant &val)
+void ColorAspect::guiToInternal()
 {
-    QTC_CHECK(!isAutoApply());
     if (d->m_colorButton)
-        d->m_colorButton->setColor(val.value<QColor>());
+        d->m_colorButton->setColor(m_internal);
 }
 
 /*!
@@ -1451,12 +1392,10 @@ void ColorAspect::setVolatileValue(const QVariant &val)
 
 
 BoolAspect::BoolAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::BoolAspectPrivate)
+    : TypedAspect(container), d(new Internal::BoolAspectPrivate)
 {
     setDefaultValue(false);
     setSpan(2, 1);
-
-    addDataExtractor(this, &BoolAspect::value, &Data::value);
 }
 
 /*!
@@ -1520,8 +1459,8 @@ std::function<void (QObject *)> BoolAspect::groupChecker()
 QAction *BoolAspect::action()
 {
     if (hasAction())
-        return BaseAspect::action();
-    auto act = BaseAspect::action(); // Creates it.
+        return TypedAspect::action();
+    auto act = TypedAspect::action(); // Creates it.
     act->setCheckable(true);
     act->setChecked(value());
     act->setToolTip(toolTip());
@@ -1531,74 +1470,32 @@ QAction *BoolAspect::action()
         // in a menu like "Use FakeVim", isAutoApply() is false, and yet this
         // here can trigger.
         //QTC_CHECK(isAutoApply());
-        setValue(newValue);
+        m_external = newValue;
+        externalToInternal();
+        internalToGui();
     });
     return act;
 }
 
-QVariant BoolAspect::volatileValue() const
+void BoolAspect::guiToInternal()
 {
     if (d->m_button)
-        return d->m_button->isChecked();
-    if (d->m_groupBox)
-        return d->m_groupBox->isChecked();
-    QTC_CHECK(false);
-    return {};
+        m_internal = d->m_button->isChecked();
+    else if (d->m_groupBox)
+        m_internal = d->m_groupBox->isChecked();
 }
 
-void BoolAspect::setVolatileValue(const QVariant &val)
+void BoolAspect::internalToGui()
 {
     if (d->m_button)
-        d->m_button->setChecked(val.toBool());
+        d->m_button->setChecked(m_internal);
     else if (d->m_groupBox)
-        d->m_groupBox->setChecked(val.toBool());
-}
-
-void BoolAspect::emitChangedValue()
-{
-    emit valueChanged(value());
-}
-
-
-/*!
-    Returns the value of the boolean aspect as a boolean value.
-*/
-
-bool BoolAspect::value() const
-{
-    return BaseAspect::value().toBool();
-}
-
-void BoolAspect::setValue(bool value)
-{
-    if (BaseAspect::setValueQuietly(value)) {
-        if (d->m_button)
-            d->m_button->setChecked(value);
-        //qDebug() << "SetValue: Changing" << labelText() << " to " << value;
-        emit changed();
-        //QTC_CHECK(!labelText().isEmpty());
-        emit valueChanged(value);
-        //qDebug() << "SetValue: Changed" << labelText() << " to " << value;
-        if (hasAction()) {
-            //qDebug() << "SetValue: Triggering " << labelText() << "with" << value;
-            emit action()->triggered(value);
-        }
-    }
-}
-
-bool BoolAspect::defaultValue() const
-{
-    return BaseAspect::defaultValue().toBool();
-}
-
-void BoolAspect::setDefaultValue(bool val)
-{
-    BaseAspect::setDefaultValue(val);
+        d->m_groupBox->setChecked(m_internal);
 }
 
 void BoolAspect::setLabel(const QString &labelText, LabelPlacement labelPlacement)
 {
-    BaseAspect::setLabelText(labelText);
+    TypedAspect::setLabelText(labelText);
     d->m_labelPlacement = labelPlacement;
 }
 
@@ -1627,7 +1524,7 @@ CheckableDecider BoolAspect::checkableDecider()
 */
 
 SelectionAspect::SelectionAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::SelectionAspectPrivate)
+    : TypedAspect(container), d(new Internal::SelectionAspectPrivate)
 {
     setSpan(2, 1);
 }
@@ -1683,25 +1580,26 @@ void SelectionAspect::addToLayout(Layouting::LayoutItem &parent)
     }
 }
 
-QVariant SelectionAspect::volatileValue() const
+void SelectionAspect::guiToInternal()
 {
     switch (d->m_displayStyle) {
     case DisplayStyle::RadioButtons:
-        QTC_ASSERT(d->m_buttonGroup, return {});
-        return d->m_buttonGroup->checkedId();
+        if (d->m_buttonGroup)
+            m_internal = d->m_buttonGroup->checkedId();
+        break;
     case DisplayStyle::ComboBox:
-        QTC_ASSERT(d->m_comboBox, return {});
-        return d->m_comboBox->currentIndex();
+        if (d->m_comboBox)
+            m_internal = d->m_comboBox->currentIndex();
+        break;
     }
-    return {};
 }
 
-void SelectionAspect::setVolatileValue(const QVariant &val)
+void SelectionAspect::internalToGui()
 {
     switch (d->m_displayStyle) {
     case DisplayStyle::RadioButtons: {
         if (d->m_buttonGroup) {
-            QAbstractButton *button = d->m_buttonGroup->button(val.toInt());
+            QAbstractButton *button = d->m_buttonGroup->button(m_internal);
             QTC_ASSERT(button, return);
             button->setChecked(true);
         }
@@ -1709,7 +1607,7 @@ void SelectionAspect::setVolatileValue(const QVariant &val)
     }
     case DisplayStyle::ComboBox:
         if (d->m_comboBox)
-            d->m_comboBox->setCurrentIndex(val.toInt());
+            d->m_comboBox->setCurrentIndex(m_internal);
         break;
     }
 }
@@ -1727,22 +1625,6 @@ void SelectionAspect::setDisplayStyle(SelectionAspect::DisplayStyle style)
     d->m_displayStyle = style;
 }
 
-int SelectionAspect::value() const
-{
-    return BaseAspect::value().toInt();
-}
-
-void SelectionAspect::setValue(int value)
-{
-    if (BaseAspect::setValueQuietly(value)) {
-        if (d->m_buttonGroup && 0 <= value && value < d->m_buttons.size())
-            d->m_buttons.at(value)->setChecked(true);
-        else if (d->m_comboBox)
-            d->m_comboBox->setCurrentIndex(value);
-        emit changed();
-    }
-}
-
 void SelectionAspect::setStringValue(const QString &val)
 {
     const int index = indexForDisplay(val);
@@ -1750,20 +1632,15 @@ void SelectionAspect::setStringValue(const QString &val)
     setValue(index);
 }
 
-int SelectionAspect::defaultValue() const
-{
-    return BaseAspect::defaultValue().toInt();
-}
-
 void SelectionAspect::setDefaultValue(int val)
 {
-    BaseAspect::setDefaultValue(val);
+    TypedAspect::setDefaultValue(val);
 }
 
 // Note: This needs to be set after all options are added.
 void SelectionAspect::setDefaultValue(const QString &val)
 {
-    BaseAspect::setDefaultValue(indexForDisplay(val));
+    TypedAspect::setDefaultValue(indexForDisplay(val));
 }
 
 QString SelectionAspect::stringValue() const
@@ -1830,7 +1707,7 @@ QVariant SelectionAspect::itemValueForIndex(int index) const
 */
 
 MultiSelectionAspect::MultiSelectionAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::MultiSelectionAspectPrivate(this))
+    : TypedAspect(container), d(new Internal::MultiSelectionAspectPrivate(this))
 {
     setDefaultValue(QStringList());
     setSpan(2, 1);
@@ -1898,23 +1775,27 @@ void MultiSelectionAspect::setDisplayStyle(MultiSelectionAspect::DisplayStyle st
     d->m_displayStyle = style;
 }
 
-QStringList MultiSelectionAspect::value() const
+void MultiSelectionAspect::internalToGui()
 {
-    return BaseAspect::value().toStringList();
+    if (d->m_listView) {
+        const int n = d->m_listView->count();
+        QTC_CHECK(n == d->m_allValues.size());
+        for (int i = 0; i != n; ++i) {
+            auto item = d->m_listView->item(i);
+            item->setCheckState(m_internal.contains(item->text()) ? Qt::Checked : Qt::Unchecked);
+        }
+    }
 }
 
-void MultiSelectionAspect::setValue(const QStringList &value)
+void MultiSelectionAspect::guiToInternal()
 {
-    if (BaseAspect::setValueQuietly(value)) {
-        if (d->m_listView) {
-            const int n = d->m_listView->count();
-            QTC_CHECK(n == d->m_allValues.size());
-            for (int i = 0; i != n; ++i) {
-                auto item = d->m_listView->item(i);
-                item->setCheckState(value.contains(item->text()) ? Qt::Checked : Qt::Unchecked);
-            }
-        } else {
-            emit changed();
+    if (d->m_listView) {
+        m_internal.clear();
+        for (const QString &val : std::as_const(d->m_allValues)) {
+            auto item = new QListWidgetItem(val, d->m_listView);
+            item->setFlags(item->flags() | Qt::ItemIsUserCheckable);
+            if (item->checkState() == Qt::Checked)
+                m_internal.append(item->text());
         }
     }
 }
@@ -1937,12 +1818,9 @@ void MultiSelectionAspect::setValue(const QStringList &value)
 // IntegerAspect
 
 IntegerAspect::IntegerAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::IntegerAspectPrivate)
+    : TypedAspect(container), d(new Internal::IntegerAspectPrivate)
 {
-    setDefaultValue(qint64(0));
     setSpan(2, 1);
-
-    addDataExtractor(this, &IntegerAspect::value, &Data::value);
 }
 
 /*!
@@ -1974,41 +1852,16 @@ void IntegerAspect::addToLayout(Layouting::LayoutItem &parent)
     }
 }
 
-QVariant IntegerAspect::volatileValue() const
-{
-    QTC_CHECK(!isAutoApply());
-    QTC_ASSERT(d->m_spinBox, return {});
-    return d->m_spinBox->value() * d->m_displayScaleFactor;
-}
-
-void IntegerAspect::setVolatileValue(const QVariant &val)
+void IntegerAspect::guiToInternal()
 {
-    QTC_CHECK(!isAutoApply());
     if (d->m_spinBox)
-        d->m_spinBox->setValue(int(val.toLongLong() / d->m_displayScaleFactor));
-}
-
-qint64 IntegerAspect::value() const
-{
-    return BaseAspect::value().toLongLong();
-}
-
-void IntegerAspect::setValue(qint64 value)
-{
-    if (BaseAspect::setValueQuietly(value)) {
-        if (d->m_spinBox)
-            d->m_spinBox->setValue(value / d->m_displayScaleFactor);
-        //qDebug() << "SetValue: Changing" << labelText() << " to " << value;
-        emit changed();
-        //QTC_CHECK(!labelText().isEmpty());
-        emit valueChanged(value);
-        //qDebug() << "SetValue: Changed" << labelText() << " to " << value;
-    }
+        m_internal = d->m_spinBox->value() * d->m_displayScaleFactor;
 }
 
-qint64 IntegerAspect::defaultValue() const
+void IntegerAspect::internalToGui()
 {
-    return BaseAspect::defaultValue().toLongLong();
+    if (d->m_spinBox)
+        d->m_spinBox->setValue(m_internal / d->m_displayScaleFactor);
 }
 
 void IntegerAspect::setRange(qint64 min, qint64 max)
@@ -2042,11 +1895,6 @@ void IntegerAspect::setDisplayScaleFactor(qint64 factor)
     d->m_displayScaleFactor = factor;
 }
 
-void IntegerAspect::setDefaultValue(qint64 defaultValue)
-{
-    BaseAspect::setDefaultValue(defaultValue);
-}
-
 void IntegerAspect::setSpecialValueText(const QString &specialText)
 {
     d->m_specialValueText = specialText;
@@ -2073,7 +1921,7 @@ void IntegerAspect::setSingleStep(qint64 step)
 */
 
 DoubleAspect::DoubleAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::DoubleAspectPrivate)
+    : TypedAspect(container), d(new Internal::DoubleAspectPrivate)
 {
     setDefaultValue(double(0));
     setSpan(2, 1);
@@ -2097,7 +1945,7 @@ void DoubleAspect::addToLayout(LayoutItem &builder)
     d->m_spinBox->setSpecialValueText(d->m_specialValueText);
     if (d->m_maximumValue && d->m_maximumValue)
         d->m_spinBox->setRange(d->m_minimumValue.value(), d->m_maximumValue.value());
-    d->m_spinBox->setValue(value()); // Must happen after setRange()!
+    internalToGui(); // Must happen after setRange()!
     addLabeledItem(builder, d->m_spinBox);
 
     if (isAutoApply()) {
@@ -2106,33 +1954,16 @@ void DoubleAspect::addToLayout(LayoutItem &builder)
     }
 }
 
-QVariant DoubleAspect::volatileValue() const
-{
-    QTC_CHECK(!isAutoApply());
-    QTC_ASSERT(d->m_spinBox, return {});
-    return d->m_spinBox->value();
-}
-
-void DoubleAspect::setVolatileValue(const QVariant &val)
+void DoubleAspect::guiToInternal()
 {
-    QTC_CHECK(!isAutoApply());
     if (d->m_spinBox)
-        d->m_spinBox->setValue(val.toDouble());
-}
-
-double DoubleAspect::value() const
-{
-    return BaseAspect::value().toDouble();
-}
-
-void DoubleAspect::setValue(double value)
-{
-    BaseAspect::setValue(value);
+        m_internal = d->m_spinBox->value();
 }
 
-double DoubleAspect::defaultValue() const
+void DoubleAspect::internalToGui()
 {
-    return BaseAspect::defaultValue().toDouble();
+    if (d->m_spinBox)
+        d->m_spinBox->setValue(m_internal);
 }
 
 void DoubleAspect::setRange(double min, double max)
@@ -2151,11 +1982,6 @@ void DoubleAspect::setSuffix(const QString &suffix)
     d->m_suffix = suffix;
 }
 
-void DoubleAspect::setDefaultValue(double defaultValue)
-{
-    BaseAspect::setDefaultValue(defaultValue);
-}
-
 void DoubleAspect::setSpecialValueText(const QString &specialText)
 {
     d->m_specialValueText = specialText;
@@ -2192,7 +2018,7 @@ TriStateAspect::TriStateAspect(AspectContainer *container,
 
 TriState TriStateAspect::value() const
 {
-    return TriState::fromVariant(BaseAspect::value());
+    return TriState::fromInt(SelectionAspect::value());
 }
 
 void TriStateAspect::setValue(TriState value)
@@ -2202,12 +2028,12 @@ void TriStateAspect::setValue(TriState value)
 
 TriState TriStateAspect::defaultValue() const
 {
-    return TriState::fromVariant(BaseAspect::defaultValue());
+    return TriState::fromInt(SelectionAspect::defaultValue());
 }
 
 void TriStateAspect::setDefaultValue(TriState value)
 {
-    BaseAspect::setDefaultValue(value.toVariant());
+    SelectionAspect::setDefaultValue(value.toInt());
 }
 
 const TriState TriState::Enabled{TriState::EnabledValue};
@@ -2216,7 +2042,11 @@ const TriState TriState::Default{TriState::DefaultValue};
 
 TriState TriState::fromVariant(const QVariant &variant)
 {
-    int v = variant.toInt();
+    return fromInt(variant.toInt());
+}
+
+TriState TriState::fromInt(int v)
+{
     QTC_ASSERT(v == EnabledValue || v == DisabledValue || v == DefaultValue, v = DefaultValue);
     return TriState(Value(v));
 }
@@ -2231,7 +2061,7 @@ TriState TriState::fromVariant(const QVariant &variant)
 */
 
 StringListAspect::StringListAspect(AspectContainer *container)
-    : BaseAspect(container), d(new Internal::StringListAspectPrivate)
+    : TypedAspect(container), d(new Internal::StringListAspectPrivate)
 {
     setDefaultValue(QStringList());
 }
@@ -2250,16 +2080,6 @@ void StringListAspect::addToLayout(LayoutItem &parent)
     // TODO - when needed.
 }
 
-QStringList StringListAspect::value() const
-{
-    return BaseAspect::value().toStringList();
-}
-
-void StringListAspect::setValue(const QStringList &value)
-{
-    BaseAspect::setValue(value);
-}
-
 void StringListAspect::appendValue(const QString &s, bool allowDuplicates)
 {
     QStringList val = value();
@@ -2303,10 +2123,8 @@ void StringListAspect::removeValues(const QStringList &values)
 */
 
 IntegersAspect::IntegersAspect(AspectContainer *container)
-    : BaseAspect(container)
-{
-    setDefaultValue({});
-}
+    : TypedAspect(container)
+{}
 
 /*!
     \internal
@@ -2322,33 +2140,6 @@ void IntegersAspect::addToLayout(Layouting::LayoutItem &parent)
     // TODO - when needed.
 }
 
-void IntegersAspect::emitChangedValue()
-{
-    emit valueChanged(value());
-}
-
-QList<int> IntegersAspect::value() const
-{
-    return transform(BaseAspect::value().toList(),
-                            [](QVariant v) { return v.toInt(); });
-}
-
-void IntegersAspect::setValue(const QList<int> &value)
-{
-    BaseAspect::setValue(transform(value, [](int i) { return QVariant::fromValue<int>(i); }));
-}
-
-QList<int> IntegersAspect::defaultValue() const
-{
-    return transform(BaseAspect::defaultValue().toList(),
-                     [](QVariant v) { return v.toInt(); });
-}
-
-void IntegersAspect::setDefaultValue(const QList<int> &value)
-{
-    BaseAspect::setDefaultValue(transform(value, [](int i) { return QVariant::fromValue<int>(i); }));
-}
-
 
 /*!
     \class Utils::TextDisplay
@@ -2576,7 +2367,7 @@ void AspectContainer::finish()
 void AspectContainer::reset()
 {
     for (BaseAspect *aspect : std::as_const(d->m_items))
-        aspect->setValueQuietly(aspect->defaultValue());
+        aspect->setVariantValueQuietly(aspect->defaultVariantValue());
 }
 
 void AspectContainer::setAutoApply(bool on)
@@ -2633,6 +2424,41 @@ BaseAspect::Data::Ptr BaseAspect::extractData() const
     return Data::Ptr(data);
 }
 
+/*
+    Mirrors the internal volatile value to the GUI element if they are already
+    created.
+
+    No-op otherwise.
+*/
+void BaseAspect::internalToGui()
+{}
+
+/*
+    Mirrors the data stored in GUI element if they are already created to
+    the internal volatile value.
+
+    No-op otherwise.
+*/
+void BaseAspect::guiToInternal()
+{}
+
+/*
+    Mirrors internal volatile value to the externally visible value.
+    This function is used for \c apply().
+
+    \returns whether the value changes.
+*/
+bool BaseAspect::internalToExternal()
+{
+    return false;
+}
+
+/*
+    Mirrors externally visible value to internal volatile value.
+*/
+void BaseAspect::externalToInternal()
+{}
+
 void BaseAspect::addDataExtractorHelper(const DataExtractor &extractor) const
 {
     d->m_dataExtractors.append(extractor);
diff --git a/src/libs/utils/aspects.h b/src/libs/utils/aspects.h
index 3c69306214..cc603edf54 100644
--- a/src/libs/utils/aspects.h
+++ b/src/libs/utils/aspects.h
@@ -51,12 +51,12 @@ public:
     Id id() const;
     void setId(Id id);
 
-    QVariant value() const;
-    void setValue(const QVariant &value);
-    bool setValueQuietly(const QVariant &value);
+    virtual QVariant variantValue() const;
+    virtual void setVariantValue(const QVariant &value);
+    virtual void setVariantValueQuietly(const QVariant &value);
 
-    QVariant defaultValue() const;
-    void setDefaultValue(const QVariant &value);
+    virtual QVariant defaultVariantValue() const;
+    virtual void setDefaultVariantValue(const QVariant &value);
 
     QString settingsKey() const;
     void setSettingsKey(const QString &settingsKey);
@@ -100,10 +100,6 @@ public:
 
     virtual void addToLayout(Layouting::LayoutItem &parent);
 
-    virtual QVariant volatileValue() const;
-    virtual void setVolatileValue(const QVariant &val);
-    virtual void emitChangedValue() {}
-
     virtual void readSettings(const QSettings *settings);
     virtual void writeSettings(QSettings *settings) const;
 
@@ -114,9 +110,10 @@ public:
     QVariant fromSettingsValue(const QVariant &val) const;
 
     virtual void apply();
+    virtual bool silentApply();
     virtual void cancel();
     virtual void finish();
-    virtual bool isDirty() const;
+    virtual bool isDirty();
     bool hasAction() const;
 
     class QTCREATOR_UTILS_EXPORT Data
@@ -164,9 +161,15 @@ public:
 
 signals:
     void changed();
+    void volatileValueChanged();
     void labelLinkActivated(const QString &link);
 
 protected:
+    virtual void internalToGui();
+    virtual void guiToInternal();
+    virtual bool internalToExternal();
+    virtual void externalToInternal();
+
     QLabel *label() const;
     void setupLabel();
     void addLabeledItem(Layouting::LayoutItem &parent, QWidget *widget);
@@ -208,35 +211,125 @@ private:
 QTCREATOR_UTILS_EXPORT void createItem(Layouting::LayoutItem *item, const BaseAspect &aspect);
 QTCREATOR_UTILS_EXPORT void createItem(Layouting::LayoutItem *item, const BaseAspect *aspect);
 
-class QTCREATOR_UTILS_EXPORT BoolAspect : public BaseAspect
+template <typename ValueType>
+class TypedAspect : public BaseAspect
 {
-    Q_OBJECT
-
 public:
-    BoolAspect(AspectContainer *container = nullptr);
-    ~BoolAspect() override;
+    TypedAspect(AspectContainer *container = nullptr)
+        : BaseAspect(container)
+    {
+        addDataExtractor(this, &TypedAspect::value, &Data::value);
+    }
 
     struct Data : BaseAspect::Data
     {
-        bool value;
+        ValueType value;
     };
 
+    ValueType operator()() const { return m_external; }
+    ValueType value() const { return m_external; }
+    ValueType defaultValue() const { return m_default; }
+
+    void setDefaultValue(const ValueType &value)
+    {
+        m_default = value;
+        setValue(value);
+    }
+
+    void setValue(const ValueType &value)
+    {
+        m_external = value;
+        if (isDirty()) {
+            externalToInternal();
+            internalToGui();
+        }
+    }
+
+    void setValueQuietly(const ValueType &value)
+    {
+        m_external = value;
+        if (isDirty()) {
+            externalToInternal();
+            internalToGui();
+        }
+    }
+
+    void setVolatileValue(const ValueType &value)
+    {
+        m_internal = value;
+        internalToGui();
+    }
+
+    ValueType volatileValue() const
+    {
+        const_cast<TypedAspect *>(this)->guiToInternal();
+        return m_internal;
+    }
+
+protected:
+    bool isDirty() override
+    {
+        guiToInternal();
+        return m_internal != m_external;
+    }
+
+    bool internalToExternal() override
+    {
+        if (m_external == m_internal)
+            return false;
+        m_external = m_internal;
+        return true;
+    }
+
+    void externalToInternal() override
+    {
+        m_internal = m_external;
+    }
+
+    QVariant variantValue() const override
+    {
+        return QVariant::fromValue<ValueType>(m_external);
+    }
+
+    void setVariantValue(const QVariant &value) override
+    {
+        setValue(value.value<ValueType>());
+    }
+
+    void setVariantValueQuietly(const QVariant &value) override
+    {
+        setValueQuietly(value.value<ValueType>());
+    }
+
+    QVariant defaultVariantValue() const override
+    {
+        return QVariant::fromValue<ValueType>(m_default);
+    }
+
+    void setDefaultVariantValue(const QVariant &value) override
+    {
+        m_default = value.value<ValueType>();
+    }
+
+    ValueType m_default{};
+    ValueType m_external{};
+    ValueType m_internal{};
+};
+
+class QTCREATOR_UTILS_EXPORT BoolAspect : public TypedAspect<bool>
+{
+    Q_OBJECT
+
+public:
+    BoolAspect(AspectContainer *container = nullptr);
+    ~BoolAspect() override;
+
     void addToLayout(Layouting::LayoutItem &parent) override;
     std::function<void(QObject *)> groupChecker();
     Utils::CheckableDecider checkableDecider();
 
     QAction *action() override;
 
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
-    void emitChangedValue() override;
-
-    bool operator()() const { return value(); }
-    bool value() const;
-    void setValue(bool val);
-    bool defaultValue() const;
-    void setDefaultValue(bool val);
-
     enum class LabelPlacement { AtCheckBox, AtCheckBoxWithoutDummyLabel, InExtraLabel };
     void setLabel(const QString &labelText,
                   LabelPlacement labelPlacement = LabelPlacement::InExtraLabel);
@@ -244,15 +337,14 @@ public:
 
     void adoptButton(QAbstractButton *button);
 
-signals:
-    void valueChanged(bool newValue);
-    void volatileValueChanged(bool newValue);
-
 private:
+    void internalToGui() override;
+    void guiToInternal() override;
+
     std::unique_ptr<Internal::BoolAspectPrivate> d;
 };
 
-class QTCREATOR_UTILS_EXPORT ColorAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT ColorAspect : public TypedAspect<QColor>
 {
     Q_OBJECT
 
@@ -260,24 +352,16 @@ public:
     ColorAspect(AspectContainer *container = nullptr);
     ~ColorAspect() override;
 
-    struct Data : BaseAspect::Data
-    {
-        QColor value;
-    };
-
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    QColor value() const;
-    void setValue(const QColor &val);
-
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
-
 private:
+    void internalToGui() override;
+    void guiToInternal() override;
+
     std::unique_ptr<Internal::ColorAspectPrivate> d;
 };
 
-class QTCREATOR_UTILS_EXPORT SelectionAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT SelectionAspect : public TypedAspect<int>
 {
     Q_OBJECT
 
@@ -286,20 +370,13 @@ public:
     ~SelectionAspect() override;
 
     void addToLayout(Layouting::LayoutItem &parent) override;
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
     void finish() override;
 
-    int operator()() const { return value(); }
-    int value() const;
-    void setValue(int val);
-
     QString stringValue() const;
     void setStringValue(const QString &val);
 
-    int defaultValue() const;
-    void setDefaultValue(int val);
     void setDefaultValue(const QString &val);
+    void setDefaultValue(int val);
 
     QVariant itemValue() const;
 
@@ -325,14 +402,15 @@ public:
     int indexForItemValue(const QVariant &value) const;
     QVariant itemValueForIndex(int index) const;
 
-signals:
-    void volatileValueChanged(int newValue);
+protected:
+    void internalToGui() override;
+    void guiToInternal() override;
 
 private:
     std::unique_ptr<Internal::SelectionAspectPrivate> d;
 };
 
-class QTCREATOR_UTILS_EXPORT MultiSelectionAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT MultiSelectionAspect : public TypedAspect<QStringList>
 {
     Q_OBJECT
 
@@ -345,17 +423,18 @@ public:
     enum class DisplayStyle { ListView };
     void setDisplayStyle(DisplayStyle style);
 
-    QStringList value() const;
-    void setValue(const QStringList &val);
-
     QStringList allValues() const;
     void setAllValues(const QStringList &val);
 
+protected:
+    void internalToGui() override;
+    void guiToInternal() override;
+
 private:
     std::unique_ptr<Internal::MultiSelectionAspectPrivate> d;
 };
 
-class QTCREATOR_UTILS_EXPORT StringAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT StringAspect : public TypedAspect<QString>
 {
     Q_OBJECT
 
@@ -371,21 +450,13 @@ public:
 
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
-    void emitChangedValue() override;
-
     // Hook between UI and StringAspect:
     using ValueAcceptor = std::function<std::optional<QString>(const QString &, const QString &)>;
     void setValueAcceptor(ValueAcceptor &&acceptor);
 
-    QString operator()() const { return value(); }
     QString value() const;
     void setValue(const QString &val);
 
-    QString defaultValue() const;
-    void setDefaultValue(const QString &val);
-
     void setShowToolTipOnLabel(bool show);
 
     void setDisplayFilter(const std::function<QString (const QString &)> &displayFilter);
@@ -438,10 +509,10 @@ public:
 
 signals:
     void checkedChanged();
-    void valueChanged(const QString &newValue);
 
 protected:
-    void update();
+    void internalToGui() override;
+    void guiToInternal() override;
 
     std::unique_ptr<Internal::StringAspectPrivate> d;
 };
@@ -454,7 +525,7 @@ public:
     FilePath operator()() const { return filePath(); }
 };
 
-class QTCREATOR_UTILS_EXPORT IntegerAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT IntegerAspect : public TypedAspect<qint64>
 {
     Q_OBJECT
 
@@ -464,16 +535,6 @@ public:
 
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
-
-    qint64 operator()() const { return value(); }
-    qint64 value() const;
-    void setValue(qint64 val);
-
-    qint64 defaultValue() const;
-    void setDefaultValue(qint64 defaultValue);
-
     void setRange(qint64 min, qint64 max);
     void setLabel(const QString &label); // FIXME: Use setLabelText
     void setPrefix(const QString &prefix);
@@ -485,14 +546,15 @@ public:
 
     struct Data : BaseAspect::Data { qint64 value = 0; };
 
-signals:
-    void valueChanged(int newValue);
+protected:
+    void internalToGui() override;
+    void guiToInternal() override;
 
 private:
     std::unique_ptr<Internal::IntegerAspectPrivate> d;
 };
 
-class QTCREATOR_UTILS_EXPORT DoubleAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT DoubleAspect : public TypedAspect<double>
 {
     Q_OBJECT
 
@@ -502,22 +564,16 @@ public:
 
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
-
-    double operator()() const { return value(); }
-    double value() const;
-    void setValue(double val);
-
-    double defaultValue() const;
-    void setDefaultValue(double defaultValue);
-
     void setRange(double min, double max);
     void setPrefix(const QString &prefix);
     void setSuffix(const QString &suffix);
     void setSpecialValueText(const QString &specialText);
     void setSingleStep(double step);
 
+protected:
+    void internalToGui() override;
+    void guiToInternal() override;
+
 private:
     std::unique_ptr<Internal::DoubleAspectPrivate> d;
 };
@@ -532,6 +588,7 @@ public:
 
     int toInt() const { return int(m_value); }
     QVariant toVariant() const { return int(m_value); }
+    static TriState fromInt(int value);
     static TriState fromVariant(const QVariant &variant);
 
     static const TriState Enabled;
@@ -562,7 +619,7 @@ public:
     void setDefaultValue(TriState setting);
 };
 
-class QTCREATOR_UTILS_EXPORT StringListAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT StringListAspect : public TypedAspect<QStringList>
 {
     Q_OBJECT
 
@@ -572,9 +629,6 @@ public:
 
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    QStringList value() const;
-    void setValue(const QStringList &val);
-
     void appendValue(const QString &value, bool allowDuplicates = true);
     void removeValue(const QString &value);
     void appendValues(const QStringList &values, bool allowDuplicates = true);
@@ -584,7 +638,7 @@ private:
     std::unique_ptr<Internal::StringListAspectPrivate> d;
 };
 
-class QTCREATOR_UTILS_EXPORT IntegersAspect : public BaseAspect
+class QTCREATOR_UTILS_EXPORT IntegersAspect : public TypedAspect<QList<int>>
 {
     Q_OBJECT
 
@@ -593,17 +647,6 @@ public:
     ~IntegersAspect() override;
 
     void addToLayout(Layouting::LayoutItem &parent) override;
-    void emitChangedValue() override;
-
-    QList<int> operator()() const { return value(); }
-    QList<int> value() const;
-    void setValue(const QList<int> &value);
-
-    QList<int> defaultValue() const;
-    void setDefaultValue(const QList<int> &value);
-
-signals:
-    void valueChanged(const QList<int> &values);
 };
 
 class QTCREATOR_UTILS_EXPORT TextDisplay : public BaseAspect
diff --git a/src/plugins/autotest/gtest/gtestsettings.cpp b/src/plugins/autotest/gtest/gtestsettings.cpp
index 7fa1e53479..32afb9a4a6 100644
--- a/src/plugins/autotest/gtest/gtestsettings.cpp
+++ b/src/plugins/autotest/gtest/gtestsettings.cpp
@@ -111,9 +111,9 @@ GTestSettings::GTestSettings(Id settingsId)
         return edit && GTestUtils::isValidGTestFilter(edit->text());
     });
 
-    QObject::connect(&groupMode, &SelectionAspect::volatileValueChanged,
-                     &gtestFilter, [this](int val) {
-        gtestFilter.setEnabled(groupMode.itemValueForIndex(val) == GTest::Constants::GTestFilter);
+    QObject::connect(&groupMode, &SelectionAspect::volatileValueChanged, &gtestFilter, [this] {
+        gtestFilter.setEnabled(groupMode.itemValueForIndex(groupMode.volatileValue())
+                               == GTest::Constants::GTestFilter);
     });
 
     QObject::connect(this, &AspectContainer::applied, this, [] {
diff --git a/src/plugins/beautifier/clangformat/clangformatsettings.cpp b/src/plugins/beautifier/clangformat/clangformatsettings.cpp
index 6a31667edb..92e175ac5f 100644
--- a/src/plugins/beautifier/clangformat/clangformatsettings.cpp
+++ b/src/plugins/beautifier/clangformat/clangformatsettings.cpp
@@ -246,7 +246,7 @@ public:
                                     configurations, predefinedStyleButton] {
             const bool predefSelected = styleButtonGroup->checkedButton() == predefinedStyleButton;
             predefinedBlob->setEnabled(predefSelected);
-            fallbackBlob->setEnabled(predefSelected && s.predefinedStyle.volatileValue().toInt() == 5); // File
+            fallbackBlob->setEnabled(predefSelected && s.predefinedStyle.volatileValue() == 5); // File
             configurations->setEnabled(!predefSelected);
         };
         updateEnabled();
diff --git a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
index 56701f1413..aa17540684 100644
--- a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
@@ -2114,12 +2114,10 @@ QString CMakeBuildSystem::cmakeBuildType() const
 void CMakeBuildSystem::setCMakeBuildType(const QString &cmakeBuildType, bool quiet)
 {
     auto aspect = buildConfiguration()->aspect<BuildTypeAspect>();
-    if (quiet) {
+    if (quiet)
         aspect->setValueQuietly(cmakeBuildType);
-        aspect->update();
-    } else {
+    else
         aspect->setValue(cmakeBuildType);
-    }
 }
 
 namespace Internal {
@@ -2179,7 +2177,7 @@ void InitialCMakeArgumentsAspect::setAllValues(const QString &values, QStringLis
 
     // Display the unknown arguments in "Additional CMake Options"
     const QString additionalOptionsValue = ProcessArgs::joinArgs(additionalOptions);
-    BaseAspect::setValueQuietly(additionalOptionsValue);
+    setValueQuietly(additionalOptionsValue);
 }
 
 void InitialCMakeArgumentsAspect::setCMakeConfiguration(const CMakeConfig &config)
diff --git a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.h b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.h
index ff16613398..6d709d58a2 100644
--- a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.h
+++ b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.h
@@ -135,7 +135,6 @@ class BuildTypeAspect final : public Utils::StringAspect
 
 public:
     BuildTypeAspect();
-    using Utils::StringAspect::update;
 };
 
 class ConfigureEnvironmentAspect final: public ProjectExplorer::EnvironmentAspect
diff --git a/src/plugins/copilot/copilotoptionspage.cpp b/src/plugins/copilot/copilotoptionspage.cpp
index 1d9a516d66..61e6d085dc 100644
--- a/src/plugins/copilot/copilotoptionspage.cpp
+++ b/src/plugins/copilot/copilotoptionspage.cpp
@@ -79,10 +79,8 @@ public:
 
         auto updateAuthWidget = [authWidget]() {
             authWidget->updateClient(
-                FilePath::fromUserInput(
-                    CopilotSettings::instance().nodeJsPath.volatileValue().toString()),
-                FilePath::fromUserInput(
-                    CopilotSettings::instance().distPath.volatileValue().toString()));
+                FilePath::fromUserInput(CopilotSettings::instance().nodeJsPath.volatileValue()),
+                FilePath::fromUserInput(CopilotSettings::instance().distPath.volatileValue()));
         };
 
         connect(CopilotSettings::instance().nodeJsPath.pathChooser(),
diff --git a/src/plugins/copilot/copilotplugin.cpp b/src/plugins/copilot/copilotplugin.cpp
index 1a554e1397..48a4dc89e8 100644
--- a/src/plugins/copilot/copilotplugin.cpp
+++ b/src/plugins/copilot/copilotplugin.cpp
@@ -142,10 +142,8 @@ void CopilotPlugin::initialize()
         requestAction->setEnabled(enabled);
     };
 
-    connect(&CopilotSettings::instance().enableCopilot,
-            &BoolAspect::valueChanged,
-            this,
-            updateActions);
+    connect(&CopilotSettings::instance().enableCopilot, &BaseAspect::changed,
+            this, updateActions);
 
     updateActions();
 
diff --git a/src/plugins/copilot/copilotsettings.cpp b/src/plugins/copilot/copilotsettings.cpp
index 5bdd3a54c3..ec4cf1f61d 100644
--- a/src/plugins/copilot/copilotsettings.cpp
+++ b/src/plugins/copilot/copilotsettings.cpp
@@ -92,8 +92,8 @@ CopilotProjectSettings::CopilotProjectSettings(ProjectExplorer::Project *project
     QVariantMap map = project->namedSettings(Constants::COPILOT_PROJECT_SETTINGS_ID).toMap();
     fromMap(map);
 
-    connect(&enableCopilot, &BoolAspect::valueChanged, this, [this, project] { save(project); });
-    connect(&useGlobalSettings, &BoolAspect::valueChanged, this, [this, project] { save(project); });
+    connect(&enableCopilot, &BaseAspect::changed, this, [this, project] { save(project); });
+    connect(&useGlobalSettings, &BaseAspect::changed, this, [this, project] { save(project); });
 }
 
 void CopilotProjectSettings::setUseGlobalSettings(bool useGlobal)
diff --git a/src/plugins/debugger/commonoptionspage.cpp b/src/plugins/debugger/commonoptionspage.cpp
index 97e9442266..a007e96f48 100644
--- a/src/plugins/debugger/commonoptionspage.cpp
+++ b/src/plugins/debugger/commonoptionspage.cpp
@@ -32,7 +32,7 @@ public:
 
         setOnApply([&s] {
             const bool originalPostMortem = s.registerForPostMortem->value();
-            const bool currentPostMortem = s.registerForPostMortem->volatileValue().toBool();
+            const bool currentPostMortem = s.registerForPostMortem->volatileValue();
             // explicitly trigger setValue() to override the setValueSilently() and trigger the registration
             if (originalPostMortem != currentPostMortem)
                 s.registerForPostMortem->setValue(currentPostMortem);
diff --git a/src/plugins/debugger/console/console.cpp b/src/plugins/debugger/console/console.cpp
index b1c3767f0e..57810ef62b 100644
--- a/src/plugins/debugger/console/console.cpp
+++ b/src/plugins/debugger/console/console.cpp
@@ -87,8 +87,8 @@ Console::Console()
     m_showDebug.setToolTip(Tr::tr("Show debug, log, and info messages."));
     m_showDebug.setValue(true);
     m_showDebug.action()->setIcon(Utils::Icons::INFO_TOOLBAR.icon());
-    connect(&m_showDebug, &Utils::BoolAspect::valueChanged,
-            proxyModel, &ConsoleProxyModel::setShowLogs);
+    connect(&m_showDebug, &Utils::BoolAspect::changed,
+            proxyModel, [this, proxyModel] { proxyModel->setShowLogs(m_showDebug()); });
     m_showDebugButton->setDefaultAction(m_showDebug.action());
 
     m_showWarningButton = new QToolButton(m_consoleWidget);
@@ -100,7 +100,7 @@ Console::Console()
     m_showWarning.setValue(true);
     m_showWarning.action()->setIcon(Utils::Icons::WARNING_TOOLBAR.icon());
     connect(m_showWarning.action(), &QAction::toggled,
-            proxyModel, &ConsoleProxyModel::setShowWarnings);
+            proxyModel, [this, proxyModel] { proxyModel->setShowWarnings(m_showWarning()); });
     m_showWarningButton->setDefaultAction(m_showWarning.action());
 
     m_showErrorButton = new QToolButton(m_consoleWidget);
@@ -112,7 +112,7 @@ Console::Console()
     m_showError.setValue(true);
     m_showError.action()->setIcon(Utils::Icons::CRITICAL_TOOLBAR.icon());
     connect(m_showError.action(), &QAction::toggled,
-            proxyModel, &ConsoleProxyModel::setShowErrors);
+            proxyModel, [this, proxyModel] { proxyModel->setShowErrors(m_showError()); });
     m_showErrorButton->setDefaultAction(m_showError.action());
 
     m_spacer = new QWidget(m_consoleWidget);
diff --git a/src/plugins/debugger/debuggeractions.cpp b/src/plugins/debugger/debuggeractions.cpp
index f83c693581..9997d3f58c 100644
--- a/src/plugins/debugger/debuggeractions.cpp
+++ b/src/plugins/debugger/debuggeractions.cpp
@@ -490,8 +490,8 @@ QString DebuggerSettings::dump()
             const int pos = key.indexOf('/');
             if (pos >= 0)
                 key = key.mid(pos);
-            const QString current = aspect->value().toString();
-            const QString default_ = aspect->defaultValue().toString();
+            const QString current = aspect->variantValue().toString();
+            const QString default_ = aspect->defaultVariantValue().toString();
             QString setting = key + ": " + current + "  (default: " + default_ + ')';
             if (current != default_)
                 setting +=  "  ***";
diff --git a/src/plugins/debugger/debuggeractions.h b/src/plugins/debugger/debuggeractions.h
index 843947ab90..1a27beae33 100644
--- a/src/plugins/debugger/debuggeractions.h
+++ b/src/plugins/debugger/debuggeractions.h
@@ -21,7 +21,7 @@ class SourcePathMapAspectPrivate;
 // Syntax: (/home/.*)/KnownSubdir -> /home/my/project
 using SourcePathMap = QMap<QString, QString>;
 
-class SourcePathMapAspect : public Utils::BaseAspect
+class SourcePathMapAspect : public Utils::TypedAspect<SourcePathMap>
 {
 public:
     SourcePathMapAspect();
@@ -32,15 +32,13 @@ public:
 
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    QVariant volatileValue() const override;
-    void setVolatileValue(const QVariant &val) override;
-
     void readSettings(const QSettings *settings) override;
     void writeSettings(QSettings *settings) const override;
 
-    SourcePathMap value() const;
-
 private:
+    void guiToInternal() override;
+    void internalToGui() override;
+
     SourcePathMapAspectPrivate *d = nullptr;
 };
 
diff --git a/src/plugins/debugger/debuggersourcepathmappingwidget.cpp b/src/plugins/debugger/debuggersourcepathmappingwidget.cpp
index 0c98ba174b..ad9aeb8739 100644
--- a/src/plugins/debugger/debuggersourcepathmappingwidget.cpp
+++ b/src/plugins/debugger/debuggersourcepathmappingwidget.cpp
@@ -470,29 +470,22 @@ void SourcePathMapAspect::addToLayout(Layouting::LayoutItem &parent)
     parent.addItem(d->m_widget.data());
 }
 
-QVariant SourcePathMapAspect::volatileValue() const
+void SourcePathMapAspect::guiToInternal()
 {
-    QTC_CHECK(!isAutoApply());
-    QTC_ASSERT(d->m_widget, return {});
-    return QVariant::fromValue(d->m_widget->sourcePathMap());
+    if (d->m_widget)
+        m_internal = d->m_widget->sourcePathMap();
 }
 
-void SourcePathMapAspect::setVolatileValue(const QVariant &val)
+void SourcePathMapAspect::internalToGui()
 {
-    QTC_CHECK(!isAutoApply());
     if (d->m_widget)
-        d->m_widget->setSourcePathMap(val.value<SourcePathMap>());
+        d->m_widget->setSourcePathMap(m_internal);
 }
 
 const char sourcePathMappingArrayNameC[] = "SourcePathMappings";
 const char sourcePathMappingSourceKeyC[] = "Source";
 const char sourcePathMappingTargetKeyC[] = "Target";
 
-SourcePathMap SourcePathMapAspect::value() const
-{
-    return BaseAspect::value().value<SourcePathMap>();
-}
-
 void SourcePathMapAspect::writeSettings(QSettings *s) const
 {
     const SourcePathMap sourcePathMap = value();
@@ -528,7 +521,7 @@ void SourcePathMapAspect::readSettings(const QSettings *settings)
         }
     }
     s->endArray();
-    setValue(QVariant::fromValue(sourcePathMap));
+    setValue(sourcePathMap);
 }
 
 } // Debugger::Internal
diff --git a/src/plugins/debugger/registerpostmortemaction.cpp b/src/plugins/debugger/registerpostmortemaction.cpp
index cc2f6fccf5..4afd0989ee 100644
--- a/src/plugins/debugger/registerpostmortemaction.cpp
+++ b/src/plugins/debugger/registerpostmortemaction.cpp
@@ -46,7 +46,7 @@ void RegisterPostMortemAction::registerNow(bool value)
 
 RegisterPostMortemAction::RegisterPostMortemAction()
 {
-    connect(this, &BoolAspect::valueChanged, this, &RegisterPostMortemAction::registerNow);
+    connect(this, &BaseAspect::changed, this, [this] { registerNow(value()); });
 }
 
 void RegisterPostMortemAction::readSettings(const QSettings *)
diff --git a/src/plugins/fakevim/fakevimactions.cpp b/src/plugins/fakevim/fakevimactions.cpp
index 916fea1609..2d4b542032 100644
--- a/src/plugins/fakevim/fakevimactions.cpp
+++ b/src/plugins/fakevim/fakevimactions.cpp
@@ -28,30 +28,6 @@ using namespace Utils;
 namespace FakeVim::Internal {
 
 #ifdef FAKEVIM_STANDALONE
-FvBaseAspect::FvBaseAspect()
-{
-}
-
-void FvBaseAspect::setValue(const QVariant &value)
-{
-    m_value = value;
-}
-
-QVariant FvBaseAspect::value() const
-{
-    return m_value;
-}
-
-void FvBaseAspect::setDefaultValue(const QVariant &value)
-{
-    m_defaultValue = value;
-    m_value = value;
-}
-
-QVariant FvBaseAspect::defaultValue() const
-{
-    return m_defaultValue;
-}
 
 void FvBaseAspect::setSettingsKey(const QString &group, const QString &key)
 {
@@ -294,7 +270,7 @@ QString FakeVimSettings::trySetValue(const QString &name, const QString &value)
             return Tr::tr("Argument must be positive: %1=%2")
                     .arg(name).arg(value);
     }
-    aspect->setValue(value);
+    aspect->setVariantValue(value);
     return QString();
 }
 
@@ -305,7 +281,7 @@ void FakeVimSettings::setup(FvBaseAspect *aspect,
                             const QString &labelText)
 {
     aspect->setSettingsKey("FakeVim", settingsKey);
-    aspect->setDefaultValue(value);
+    aspect->setDefaultVariantValue(value);
 #ifndef FAKEVIM_STANDALONE
     aspect->setLabelText(labelText);
     aspect->setAutoApply(false);
diff --git a/src/plugins/fakevim/fakevimactions.h b/src/plugins/fakevim/fakevimactions.h
index e3b14b0d47..a3907dc117 100644
--- a/src/plugins/fakevim/fakevimactions.h
+++ b/src/plugins/fakevim/fakevimactions.h
@@ -19,13 +19,14 @@ namespace FakeVim::Internal {
 class FvBaseAspect
 {
 public:
-    FvBaseAspect();
-    virtual ~FvBaseAspect() {}
+    FvBaseAspect() = default;
+    virtual ~FvBaseAspect() = default;
+
+    virtual void setVariantValue(const QVariant &value) = 0;
+    virtual void setDefaultVariantValue(const QVariant &value) = 0;
+    virtual QVariant variantValue() const = 0;
+    virtual QVariant defaultVariantValue() const = 0;
 
-    void setValue(const QVariant &value);
-    QVariant value() const;
-    void setDefaultValue(const QVariant &value);
-    QVariant defaultValue() const;
     void setSettingsKey(const QString &group, const QString &key);
     QString settingsKey() const;
     void setCheckable(bool) {}
@@ -33,32 +34,41 @@ public:
     void setToolTip(const QString &) {}
 
 private:
-    QVariant m_value;
-    QVariant m_defaultValue;
     QString m_settingsGroup;
     QString m_settingsKey;
 };
 
-class FvBoolAspect : public FvBaseAspect
-{
-public:
-    bool value() const { return FvBaseAspect::value().toBool(); }
-    bool operator()() const { return value(); }
-};
-
-class FvIntegerAspect : public FvBaseAspect
+template <class ValueType>
+class FvTypedAspect : public FvBaseAspect
 {
 public:
-    qint64 value() const { return FvBaseAspect::value().toLongLong(); }
-    qint64 operator()() const { return value(); }
+    void setVariantValue(const QVariant &value) override
+    {
+        m_value = value.value<ValueType>();
+    }
+    void setDefaultVariantValue(const QVariant &value) override
+    {
+        m_defaultValue = value.value<ValueType>();
+    }
+    QVariant variantValue() const override
+    {
+        return QVariant::fromValue<ValueType>(m_value);
+    }
+    QVariant defaultVariantValue() const override
+    {
+        return QVariant::fromValue<ValueType>(m_defaultValue);
+    }
+
+    ValueType value() const { return m_value; }
+    ValueType operator()() const { return m_value; }
+
+    ValueType m_value;
+    ValueType m_defaultValue;
 };
 
-class FvStringAspect : public FvBaseAspect
-{
-public:
-    QString value() const { return FvBaseAspect::value().toString(); }
-    QString operator()() const { return value(); }
-};
+using FvBoolAspect = FvTypedAspect<bool>;
+using FvIntegerAspect = FvTypedAspect<qint64>;
+using FvStringAspect = FvTypedAspect<QString>;
 
 class FvAspectContainer : public FvBaseAspect
 {
diff --git a/src/plugins/fakevim/fakevimhandler.cpp b/src/plugins/fakevim/fakevimhandler.cpp
index edfa315af9..bb3586b632 100644
--- a/src/plugins/fakevim/fakevimhandler.cpp
+++ b/src/plugins/fakevim/fakevimhandler.cpp
@@ -6139,13 +6139,13 @@ bool FakeVimHandler::Private::handleExSetCommand(const ExCommand &cmd)
         FvBaseAspect *act = s.item(optionName);
         if (!act) {
             showMessage(MessageError, Tr::tr("Unknown option:") + ' ' + cmd.args);
-        } else if (act->defaultValue().type() == QVariant::Bool) {
-            bool oldValue = act->value().toBool();
+        } else if (act->defaultVariantValue().type() == QVariant::Bool) {
+            bool oldValue = act->variantValue().toBool();
             if (printOption) {
                 showMessage(MessageInfo, QLatin1String(oldValue ? "" : "no")
                             + act->settingsKey().toLower());
             } else if (toggleOption || negateOption == oldValue) {
-                act->setValue(!oldValue);
+                act->setVariantValue(!oldValue);
             }
         } else if (negateOption && !printOption) {
             showMessage(MessageError, Tr::tr("Invalid argument:") + ' ' + cmd.args);
@@ -6153,7 +6153,7 @@ bool FakeVimHandler::Private::handleExSetCommand(const ExCommand &cmd)
             showMessage(MessageError, Tr::tr("Trailing characters:") + ' ' + cmd.args);
         } else {
             showMessage(MessageInfo, act->settingsKey().toLower() + "="
-                        + act->value().toString());
+                        + act->variantValue().toString());
         }
     }
     updateEditor();
diff --git a/src/plugins/fakevim/fakevimplugin.cpp b/src/plugins/fakevim/fakevimplugin.cpp
index 5b51cb5f96..fb3049a7b0 100644
--- a/src/plugins/fakevim/fakevimplugin.cpp
+++ b/src/plugins/fakevim/fakevimplugin.cpp
@@ -1089,16 +1089,16 @@ void FakeVimPluginPrivate::initialize()
             this, &FakeVimPluginPrivate::documentRenamed);
 
     FakeVimSettings &s = settings();
-    connect(&s.useFakeVim, &FvBoolAspect::valueChanged,
-            this, &FakeVimPluginPrivate::setUseFakeVim);
+    connect(&s.useFakeVim, &FvBoolAspect::changed,
+            this, [this, &s] { setUseFakeVim(s.useFakeVim()); });
     connect(&s.readVimRc, &FvBaseAspect::changed,
             this, &FakeVimPluginPrivate::maybeReadVimRc);
     connect(&s.vimRcPath, &FvBaseAspect::changed,
             this, &FakeVimPluginPrivate::maybeReadVimRc);
-    connect(&s.relativeNumber, &FvBoolAspect::valueChanged,
-            this, &FakeVimPluginPrivate::setShowRelativeLineNumbers);
-    connect(&s.blinkingCursor, &FvBoolAspect::valueChanged,
-            this, &FakeVimPluginPrivate::setCursorBlinking);
+    connect(&s.relativeNumber, &FvBoolAspect::changed,
+            this, [this, &s] { setShowRelativeLineNumbers(s.relativeNumber()); });
+    connect(&s.blinkingCursor, &FvBoolAspect::changed,
+            this, [this, &s] { setCursorBlinking(s.blinkingCursor()); });
 
     // Delayed operations.
     connect(this, &FakeVimPluginPrivate::delayedQuitRequested,
diff --git a/src/plugins/git/gitplugin.cpp b/src/plugins/git/gitplugin.cpp
index c5f30fa036..9ada18c119 100644
--- a/src/plugins/git/gitplugin.cpp
+++ b/src/plugins/git/gitplugin.cpp
@@ -1466,9 +1466,8 @@ void GitPluginPrivate::setupInstantBlame()
         forceInstantBlame();
     };
 
-    connect(&settings().instantBlame, &BoolAspect::valueChanged, this,
-            [this, setupBlameForEditor](bool enabled) {
-        if (enabled)
+    connect(&settings().instantBlame, &BaseAspect::changed, this, [this, setupBlameForEditor] {
+        if (settings().instantBlame())
             setupBlameForEditor(EditorManager::currentEditor());
         else
             stopInstantBlame();
diff --git a/src/plugins/git/gitsettings.cpp b/src/plugins/git/gitsettings.cpp
index 4ebf7debee..4ef786c535 100644
--- a/src/plugins/git/gitsettings.cpp
+++ b/src/plugins/git/gitsettings.cpp
@@ -146,8 +146,8 @@ GitSettings::GitSettings()
             st
         };
     });
-    connect(&binaryPath, &StringAspect::valueChanged, this, [this] { tryResolve = true; });
-    connect(&path, &StringAspect::valueChanged, this, [this] { tryResolve = true; });
+    connect(&binaryPath, &BaseAspect::changed, this, [this] { tryResolve = true; });
+    connect(&path, &BaseAspect::changed, this, [this] { tryResolve = true; });
 }
 
 FilePath GitSettings::gitExecutable(bool *ok, QString *errorMessage) const
diff --git a/src/plugins/nim/nimplugin.cpp b/src/plugins/nim/nimplugin.cpp
index b3ef6fc49f..cdad3981ca 100644
--- a/src/plugins/nim/nimplugin.cpp
+++ b/src/plugins/nim/nimplugin.cpp
@@ -42,9 +42,10 @@ public:
     NimPluginPrivate()
     {
         Suggest::NimSuggestCache::instance().setExecutablePath(settings.nimSuggestPath.value());
-        QObject::connect(&settings.nimSuggestPath, &StringAspect::valueChanged,
-                         &Suggest::NimSuggestCache::instance(),
-                         &Suggest::NimSuggestCache::setExecutablePath);
+        QObject::connect(&settings.nimSuggestPath, &StringAspect::changed,
+                         &Suggest::NimSuggestCache::instance(), [this] {
+            Suggest::NimSuggestCache::instance().setExecutablePath(settings.nimSuggestPath.value());
+        });
     }
 
     NimSettings settings;
diff --git a/src/plugins/perforce/perforcesettings.cpp b/src/plugins/perforce/perforcesettings.cpp
index 6dff959d5f..42201b208a 100644
--- a/src/plugins/perforce/perforcesettings.cpp
+++ b/src/plugins/perforce/perforcesettings.cpp
@@ -109,8 +109,7 @@ PerforceSettings::PerforceSettings()
             errorLabel->setType(InfoLabel::Information);
             errorLabel->setText(Tr::tr("Testing..."));
 
-            const FilePath p4Bin = FilePath::fromUserInput(
-                        p4BinaryPath.volatileValue().toString());
+            const FilePath p4Bin = FilePath::fromUserInput(p4BinaryPath.volatileValue());
             checker->start(p4Bin, {}, commonP4Arguments_volatile(), 10000);
         });
 
@@ -166,14 +165,14 @@ QStringList PerforceSettings::commonP4Arguments() const
 QStringList PerforceSettings::commonP4Arguments_volatile() const
 {
     QStringList lst;
-    if (customEnv.volatileValue().toBool()) {
-        auto p4C = p4Client.volatileValue().toString();
+    if (customEnv.volatileValue()) {
+        const QString p4C = p4Client.volatileValue();
         if (!p4C.isEmpty())
             lst << "-c" << p4C;
-        auto p4P = p4Port.volatileValue().toString();
+        const QString p4P = p4Port.volatileValue();
         if (!p4P.isEmpty())
             lst << "-p" << p4P;
-        auto p4U = p4User.volatileValue().toString();
+        const QString p4U = p4User.volatileValue();
         if (!p4U.isEmpty())
             lst << "-u" << p4U;
     }
diff --git a/src/plugins/perfprofiler/perfsettings.cpp b/src/plugins/perfprofiler/perfsettings.cpp
index 59a753e5dd..8851b19d77 100644
--- a/src/plugins/perfprofiler/perfsettings.cpp
+++ b/src/plugins/perfprofiler/perfsettings.cpp
@@ -58,8 +58,8 @@ PerfSettings::PerfSettings(ProjectExplorer::Target *target)
     extraArguments.setLabelText(Tr::tr("Additional arguments:"));
     extraArguments.setSpan(4);
 
-    connect(&callgraphMode, &SelectionAspect::volatileValueChanged, this, [this](int index) {
-        stackSize.setEnabled(index == 0);
+    connect(&callgraphMode, &SelectionAspect::volatileValueChanged, this, [this] {
+        stackSize.setEnabled(callgraphMode.volatileValue() == 0);
     });
 
     readGlobalSettings();
diff --git a/src/plugins/projectexplorer/buildpropertiessettings.cpp b/src/plugins/projectexplorer/buildpropertiessettings.cpp
index 6df8fdd328..aed8c5a8ba 100644
--- a/src/plugins/projectexplorer/buildpropertiessettings.cpp
+++ b/src/plugins/projectexplorer/buildpropertiessettings.cpp
@@ -59,10 +59,12 @@ BuildPropertiesSettings::BuildPropertiesSettings()
     qtQuickCompiler.setSettingsKey("ProjectExplorer/Settings/QtQuickCompiler");
     qtQuickCompiler.setLabelText(Tr::tr("Use qmlcachegen:"));
 
-    QObject::connect(&showQtSettings, &BoolAspect::valueChanged,
-                     &qmlDebugging, &BaseAspect::setVisible);
-    QObject::connect(&showQtSettings, &BoolAspect::valueChanged,
-                     &qtQuickCompiler, &BaseAspect::setVisible);
+    QObject::connect(&showQtSettings, &BaseAspect::changed, &qmlDebugging, [this] {
+        qmlDebugging.setVisible(showQtSettings());
+    });
+    QObject::connect(&showQtSettings, &BaseAspect::changed, &qtQuickCompiler, [this] {
+        qtQuickCompiler.setVisible(showQtSettings());
+    });
 }
 
 QString BuildPropertiesSettings::defaultBuildDirectoryTemplate()
diff --git a/src/plugins/python/pythonwizardpage.cpp b/src/plugins/python/pythonwizardpage.cpp
index 2216dbfa57..59ecebf688 100644
--- a/src/plugins/python/pythonwizardpage.cpp
+++ b/src/plugins/python/pythonwizardpage.cpp
@@ -109,8 +109,8 @@ PythonWizardPage::PythonWizardPage(const QList<QPair<QString, QVariant>> &pySide
     m_stateLabel->setWordWrap(true);
     m_stateLabel->setFilled(true);
     m_stateLabel->setType(InfoLabel::Error);
-    connect(&m_venvPath, &StringAspect::valueChanged, this, &PythonWizardPage::updateStateLabel);
-    connect(&m_createVenv, &BoolAspect::valueChanged, this, &PythonWizardPage::updateStateLabel);
+    connect(&m_venvPath, &BaseAspect::changed, this, &PythonWizardPage::updateStateLabel);
+    connect(&m_createVenv, &BaseAspect::changed, this, &PythonWizardPage::updateStateLabel);
 
     Grid {
         m_pySideVersion, br,
diff --git a/src/plugins/squish/squishsettings.cpp b/src/plugins/squish/squishsettings.cpp
index f7758a844d..5b069f35fc 100644
--- a/src/plugins/squish/squishsettings.cpp
+++ b/src/plugins/squish/squishsettings.cpp
@@ -87,7 +87,8 @@ SquishSettings::SquishSettings()
     minimizeIDE.setToolTip(Tr::tr("Minimize IDE automatically while running or recording test cases."));
     minimizeIDE.setDefaultValue(true);
 
-    connect(&local, &BoolAspect::volatileValueChanged, this, [this](bool checked) {
+    connect(&local, &BoolAspect::volatileValueChanged, this, [this] {
+        const bool checked = local.volatileValue();
         serverHost.setEnabled(!checked);
         serverPort.setEnabled(!checked);
     });
diff --git a/src/plugins/valgrind/memchecktool.cpp b/src/plugins/valgrind/memchecktool.cpp
index e2921603e9..5224b3c78c 100644
--- a/src/plugins/valgrind/memchecktool.cpp
+++ b/src/plugins/valgrind/memchecktool.cpp
@@ -923,13 +923,12 @@ void MemcheckToolPrivate::updateFromSettings()
     m_filterProjectAction->setChecked(!m_settings->filterExternalIssues());
     m_errorView->settingsChanged(m_settings);
 
-    connect(&m_settings->visibleErrorKinds, &IntegersAspect::valueChanged,
-            &m_errorProxyModel, &MemcheckErrorFilterProxyModel::setAcceptedKinds);
-    m_errorProxyModel.setAcceptedKinds(m_settings->visibleErrorKinds());
-
-    connect(&m_settings->filterExternalIssues, &BoolAspect::valueChanged,
-            &m_errorProxyModel, &MemcheckErrorFilterProxyModel::setFilterExternalIssues);
-    m_errorProxyModel.setFilterExternalIssues(m_settings->filterExternalIssues());
+    connect(&m_settings->visibleErrorKinds, &BaseAspect::changed, &m_errorProxyModel, [this] {
+        m_errorProxyModel.setAcceptedKinds(m_settings->visibleErrorKinds());
+    });
+    connect(&m_settings->filterExternalIssues, &BaseAspect::changed, &m_errorProxyModel, [this] {
+        m_errorProxyModel.setFilterExternalIssues(m_settings->filterExternalIssues());
+    });
 }
 
 void MemcheckToolPrivate::maybeActiveRunConfigurationChanged()
diff --git a/src/plugins/valgrind/valgrindsettings.cpp b/src/plugins/valgrind/valgrindsettings.cpp
index 4db2e39c3a..55c6a3543c 100644
--- a/src/plugins/valgrind/valgrindsettings.cpp
+++ b/src/plugins/valgrind/valgrindsettings.cpp
@@ -108,7 +108,7 @@ void SuppressionAspectPrivate::slotSuppressionSelectionChanged()
 //
 
 SuppressionAspect::SuppressionAspect(AspectContainer *container, bool global)
-    : BaseAspect(container)
+    : TypedAspect(container)
 {
     d = new SuppressionAspectPrivate(this, global);
     setSettingsKey("Analyzer.Valgrind.SuppressionFiles");
@@ -119,16 +119,6 @@ SuppressionAspect::~SuppressionAspect()
     delete d;
 }
 
-FilePaths SuppressionAspect::value() const
-{
-    return FileUtils::toFilePathList(BaseAspect::value().toStringList());
-}
-
-void SuppressionAspect::setValue(const FilePaths &val)
-{
-    BaseAspect::setValue(Utils::transform<QStringList>(val, &FilePath::toString));
-}
-
 void SuppressionAspect::addToLayout(Layouting::LayoutItem &parent)
 {
     QTC_CHECK(!d->addEntry);
@@ -157,8 +147,6 @@ void SuppressionAspect::addToLayout(Layouting::LayoutItem &parent)
         Column { d->addEntry.data(), d->removeEntry.data(), st }
     };
     parent.addItem(Span { 2, group });
-
-    setVolatileValue(BaseAspect::value());
 }
 
 void SuppressionAspect::fromMap(const QVariantMap &map)
@@ -171,22 +159,18 @@ void SuppressionAspect::toMap(QVariantMap &map) const
     BaseAspect::toMap(map);
 }
 
-QVariant SuppressionAspect::volatileValue() const
+void SuppressionAspect::guiToInternal()
 {
-    QStringList ret;
-
+    m_internal.clear();
     for (int i = 0; i < d->m_model.rowCount(); ++i)
-        ret << d->m_model.item(i)->text();
-
-    return ret;
+        m_internal.append(FilePath::fromUserInput(d->m_model.item(i)->text()));
 }
 
-void SuppressionAspect::setVolatileValue(const QVariant &val)
+void SuppressionAspect::internalToGui()
 {
-    const QStringList files = val.toStringList();
     d->m_model.clear();
-    for (const QString &file : files)
-        d->m_model.appendRow(new QStandardItem(file));
+    for (const FilePath &file : m_internal)
+        d->m_model.appendRow(new QStandardItem(file.toUserOutput()));
 }
 
 //////////////////////////////////////////////////////////////////
@@ -388,7 +372,7 @@ QVariantMap ValgrindBaseSettings::defaultSettings() const
 {
     QVariantMap defaults;
     forEachAspect([&defaults](BaseAspect *aspect) {
-        defaults.insert(aspect->settingsKey(), aspect->defaultValue());
+        defaults.insert(aspect->settingsKey(), aspect->defaultVariantValue());
     });
     return defaults;
 }
diff --git a/src/plugins/valgrind/valgrindsettings.h b/src/plugins/valgrind/valgrindsettings.h
index 29506b848f..def8b793da 100644
--- a/src/plugins/valgrind/valgrindsettings.h
+++ b/src/plugins/valgrind/valgrindsettings.h
@@ -12,7 +12,7 @@ const char ANALYZER_VALGRIND_SETTINGS[] = "Analyzer.Valgrind.Settings";
 
 class SuppressionAspectPrivate;
 
-class SuppressionAspect final : public Utils::BaseAspect
+class SuppressionAspect final : public Utils::TypedAspect<Utils::FilePaths>
 {
     Q_OBJECT
 
@@ -20,21 +20,17 @@ public:
     SuppressionAspect(Utils::AspectContainer *container, bool global);
     ~SuppressionAspect() final;
 
-    Utils::FilePaths operator()() const { return value(); }
-    Utils::FilePaths value() const;
-    void setValue(const Utils::FilePaths &val);
-
     void addToLayout(Layouting::LayoutItem &parent) final;
 
     void fromMap(const QVariantMap &map) final;
     void toMap(QVariantMap &map) const final;
 
-    QVariant volatileValue() const final;
-    void setVolatileValue(const QVariant &val) final;
-
     void addSuppressionFile(const Utils::FilePath &suppressionFile);
 
 private:
+    void internalToGui() override;
+    void guiToInternal() override;
+
     friend class ValgrindBaseSettings;
     SuppressionAspectPrivate *d = nullptr;
 };