From 9816567056c93f193c8d86d8e3cc8e22695b6642 Mon Sep 17 00:00:00 2001
From: Michael Brasser <michael.brasser@nokia.com>
Date: Tue, 28 Jul 2009 13:25:11 +1000
Subject: Fix ParentChange in states.

Make sure we can override when necessary.
---
 src/declarative/util/qmlstate.cpp           | 28 +++++++++++++++++++++++-----
 src/declarative/util/qmlstate.h             |  1 +
 src/declarative/util/qmlstateoperations.cpp | 10 ++++++++++
 src/declarative/util/qmlstateoperations.h   |  1 +
 4 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/src/declarative/util/qmlstate.cpp b/src/declarative/util/qmlstate.cpp
index c41c31a..af60a6f 100644
--- a/src/declarative/util/qmlstate.cpp
+++ b/src/declarative/util/qmlstate.cpp
@@ -110,6 +110,11 @@ void ActionEvent::clearReverseBindings()
 {
 }
 
+bool ActionEvent::override(ActionEvent *other)
+{
+    return false;
+}
+
 /*!
     \internal
 */
@@ -378,13 +383,15 @@ void QmlState::apply(QmlStateGroup *group, QmlTransition *trans, QmlState *rever
         if (action.event) {
             if (!action.event->isReversable())
                 continue;
-            /*for (jj = 0; jj < d->revertList.count(); ++jj) {
+            for (jj = 0; jj < d->revertList.count(); ++jj) {
                 ActionEvent *event = d->revertList.at(jj).event;
                 if (event && event->typeName() == action.event->typeName()) {
-                    found = true;
-                    break;
+                    if (action.event->override(event)) {
+                        found = true;
+                        break;
+                    }
                 }
-            }*/ //### not a close enough match
+            }
         } else {
             action.fromBinding = action.property.binding();
 
@@ -417,7 +424,18 @@ void QmlState::apply(QmlStateGroup *group, QmlTransition *trans, QmlState *rever
     // into this state need to be translated into apply actions
     for (int ii = 0; ii < d->revertList.count(); ++ii) {
         bool found = false;
-        if (!d->revertList.at(ii).event) {    //### corresponding test for events?
+        if (d->revertList.at(ii).event) {
+            ActionEvent *event = d->revertList.at(ii).event;
+            if (!event->isReversable())
+                continue;
+            for (int jj = 0; !found && jj < applyList.count(); ++jj) {
+                const Action &action = applyList.at(jj);
+                if (action.event && action.event->typeName() == event->typeName()) {
+                    if (action.event->override(event))
+                        found = true;
+                }
+            }
+        } else {
             for (int jj = 0; !found && jj < applyList.count(); ++jj) {
                 const Action &action = applyList.at(jj);
                 if (action.property == d->revertList.at(ii).property)
diff --git a/src/declarative/util/qmlstate.h b/src/declarative/util/qmlstate.h
index 7b3021b..7c62768 100644
--- a/src/declarative/util/qmlstate.h
+++ b/src/declarative/util/qmlstate.h
@@ -96,6 +96,7 @@ public:
     virtual bool changesBindings();
     virtual void clearForwardBindings();
     virtual void clearReverseBindings();
+    virtual bool override(ActionEvent*other);
 };
 
 class QmlStateGroup;
diff --git a/src/declarative/util/qmlstateoperations.cpp b/src/declarative/util/qmlstateoperations.cpp
index e2cbae4..3d03c34 100644
--- a/src/declarative/util/qmlstateoperations.cpp
+++ b/src/declarative/util/qmlstateoperations.cpp
@@ -202,6 +202,16 @@ QString QmlParentChange::typeName() const
     return QLatin1String("ParentChange");
 }
 
+bool QmlParentChange::override(ActionEvent*other)
+{
+    Q_D(QmlParentChange);
+    if (other->typeName() != QLatin1String("ParentChange"))
+        return false;
+    if (QmlParentChange *otherPC = static_cast<QmlParentChange*>(other))
+        return (d->target == otherPC->object());
+    return false;
+}
+
 class QmlRunScriptPrivate : public QObjectPrivate
 {
 public:
diff --git a/src/declarative/util/qmlstateoperations.h b/src/declarative/util/qmlstateoperations.h
index f595e16..4bd17a0 100644
--- a/src/declarative/util/qmlstateoperations.h
+++ b/src/declarative/util/qmlstateoperations.h
@@ -76,6 +76,7 @@ public:
     virtual bool isReversable();
     virtual void reverse();
     virtual QString typeName() const;
+    virtual bool override(ActionEvent*other);
 };
 
 class QmlRunScriptPrivate;
-- 
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