Add reset methods to QmlMetaProperty

2 files changed, 27 insertions, 0 deletions

diff --git a/src/declarative/qml/qmlmetaproperty.cpp b/src/declarative/qml/qmlmetaproperty.cpp
index 4717782..dbf6548 100644
--- a/src/declarative/qml/qmlmetaproperty.cpp
+++ b/src/declarative/qml/qmlmetaproperty.cpp
@@ -435,6 +435,17 @@ bool QmlMetaProperty::isDesignable() const
 }
 
 /*!
+    Returns true if the property is resettable, otherwise false.
+*/
+bool QmlMetaProperty::isResettable() const
+{
+    if (type() & Property && d->core.isValid() && d->object)
+        return d->core.flags & QmlPropertyCache::Data::IsResettable;
+    else
+        return false;
+}
+
+/*!
     Returns true if the QmlMetaProperty refers to a valid property, otherwise
     false.
 */
@@ -967,6 +978,20 @@ bool QmlMetaProperty::write(const QVariant &value) const
     return write(value, 0);
 }
 
+/*!
+    Resets the property value.
+*/
+bool QmlMetaProperty::reset() const
+{
+    if (isResettable()) {
+        void *args[] = { 0 };
+        QMetaObject::metacall(d->object, QMetaObject::ResetProperty, d->core.coreIndex, args);
+        return true;
+    } else {
+        return false;
+    }
+}
+
 bool QmlMetaProperty::write(const QVariant &value, QmlMetaProperty::WriteFlags flags) const
 {
     if (d->object && type() & Property && d->core.isValid() && isWritable()) 
diff --git a/src/declarative/qml/qmlmetaproperty.h b/src/declarative/qml/qmlmetaproperty.h
index dcb5905..240f5a2 100644
--- a/src/declarative/qml/qmlmetaproperty.h
+++ b/src/declarative/qml/qmlmetaproperty.h
@@ -88,6 +88,7 @@ public:
     enum WriteFlag { BypassInterceptor = 0x01, DontRemoveBinding = 0x02 };
     Q_DECLARE_FLAGS(WriteFlags, WriteFlag)
     bool write(const QVariant &, QmlMetaProperty::WriteFlags) const;
+    bool reset() const;
 
     bool hasChangedNotifier() const;
     bool needsChangedNotifier() const;
@@ -108,6 +109,7 @@ public:
     bool isDefault() const;
     bool isWritable() const;
     bool isDesignable() const;
+    bool isResettable() const;
     bool isValid() const;
     QObject *object() const;