From a034773ce0e9d3fe3e7768da248d8c2e99cf132d Mon Sep 17 00:00:00 2001
From: Kai Koehne <kai.koehne@nokia.com>
Date: Fri, 26 Mar 2010 08:38:43 +0100
Subject: Adds a way to  clear the state list property in
 QDeclarativeStateGroup

Needed by QmlDesigner, which needs to be able to remove states
at runtime.

Done my Marco Bubke

Reviewed-by: Michael Brasser
---
 src/declarative/util/qdeclarativestategroup.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/declarative/util/qdeclarativestategroup.cpp b/src/declarative/util/qdeclarativestategroup.cpp
index bc4582c..258a9e9 100644
--- a/src/declarative/util/qdeclarativestategroup.cpp
+++ b/src/declarative/util/qdeclarativestategroup.cpp
@@ -69,6 +69,7 @@ public:
     static void append_state(QDeclarativeListProperty<QDeclarativeState> *list, QDeclarativeState *state);
     static int count_state(QDeclarativeListProperty<QDeclarativeState> *list);
     static QDeclarativeState *at_state(QDeclarativeListProperty<QDeclarativeState> *list, int index);
+    static void clear_states(QDeclarativeListProperty<QDeclarativeState> *list);
 
     QList<QDeclarativeState *> states;
     QList<QDeclarativeTransition *> transitions;
@@ -150,7 +151,8 @@ QDeclarativeListProperty<QDeclarativeState> QDeclarativeStateGroup::statesProper
     Q_D(QDeclarativeStateGroup);
     return QDeclarativeListProperty<QDeclarativeState>(this, &d->states, &QDeclarativeStateGroupPrivate::append_state,
                                                        &QDeclarativeStateGroupPrivate::count_state,
-                                                       &QDeclarativeStateGroupPrivate::at_state);
+                                                       &QDeclarativeStateGroupPrivate::at_state,
+                                                       &QDeclarativeStateGroupPrivate::clear_states);
 }
 
 void QDeclarativeStateGroupPrivate::append_state(QDeclarativeListProperty<QDeclarativeState> *list, QDeclarativeState *state)
@@ -175,6 +177,16 @@ QDeclarativeState *QDeclarativeStateGroupPrivate::at_state(QDeclarativeListPrope
     return _this->d_func()->states.at(index);
 }
 
+void QDeclarativeStateGroupPrivate::clear_states(QDeclarativeListProperty<QDeclarativeState> *list)
+{
+    QDeclarativeStateGroup *_this = static_cast<QDeclarativeStateGroup *>(list->object);
+    _this->d_func()->setCurrentStateInternal(QString(), true);
+    for (int i = 0; i < _this->d_func()->states.count(); ++i) {
+        _this->d_func()->states.at(i)->setStateGroup(0);
+    }
+    _this->d_func()->states.clear();
+}
+
 /*!
   \qmlproperty list<Transition> StateGroup::transitions
   This property holds a list of transitions defined by the state group.
-- 
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