QmlDesigner: Inspect components for existing states

For each created items we retrieve a list of the names
of all existing states.

Task-number: QDS-1978
Change-Id: I8e85e439fce3c6204cb8bcf69f6be847cc8dae5c
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/quickitemnodeinstance.cpp

@@ -232,6 +232,20 @@ QList<QQuickItem *> QuickItemNodeInstance::allItemsRecursive() const
     return itemList;
 }
 
+QStringList QuickItemNodeInstance::allStates() const
+{
+    QStringList list;
+
+    QList<QObject*> stateList = DesignerSupport::statesForItem(quickItem());
+    for (QObject *state : stateList) {
+        QQmlProperty property(state, "name");
+        if (property.isValid())
+            list.append(property.read().toString());
+    }
+
+    return list;
+}
+
 QRectF QuickItemNodeInstance::contentItemBoundingBox() const
 {
     if (contentItem()) {