From ce3dee765c858a0b573d468ef8fee6b838e576d1 Mon Sep 17 00:00:00 2001
From: Michael Brasser <michael.brasser@nokia.com>
Date: Fri, 3 Feb 2012 12:26:37 +1000
Subject: Add and use new animation backend.

The new backend improves performance, and allows us to create
multiple running animation jobs from a single Transition. It is
based off of the existing Qt animation framework.

Change-Id: Id1d0162f6e5c65bf31267f3f9f2042c354375d57
Reviewed-by: Yunqiao Yin <charles.yin@nokia.com>
---
 src/quick/util/qdeclarativetransitionmanager.cpp | 31 ++++++++++++++++--------
 1 file changed, 21 insertions(+), 10 deletions(-)

(limited to 'src/quick/util/qdeclarativetransitionmanager.cpp')

diff --git a/src/quick/util/qdeclarativetransitionmanager.cpp b/src/quick/util/qdeclarativetransitionmanager.cpp
index 5542548937..a2de7dbae6 100644
--- a/src/quick/util/qdeclarativetransitionmanager.cpp
+++ b/src/quick/util/qdeclarativetransitionmanager.cpp
@@ -43,7 +43,6 @@
 
 #include "qdeclarativetransition_p.h"
 #include "qdeclarativestate_p_p.h"
-#include "qdeclarativestate_p.h"
 
 #include <private/qdeclarativebinding_p.h>
 #include <private/qdeclarativeglobal_p.h>
@@ -59,12 +58,12 @@ class QDeclarativeTransitionManagerPrivate
 {
 public:
     QDeclarativeTransitionManagerPrivate()
-        : state(0) {}
+        : state(0), transitionInstance(0) {}
 
     void applyBindings();
     typedef QList<QDeclarativeSimpleAction> SimpleActionList;
     QDeclarativeState *state;
-    QDeclarativeGuard<QDeclarativeTransition> transition;
+    QDeclarativeTransitionInstance *transitionInstance;
     QDeclarativeStateOperation::ActionList bindingsList;
     SimpleActionList completeList;
 };
@@ -81,9 +80,15 @@ void QDeclarativeTransitionManager::setState(QDeclarativeState *s)
 
 QDeclarativeTransitionManager::~QDeclarativeTransitionManager()
 {
+    delete d->transitionInstance;
     delete d; d = 0;
 }
 
+bool QDeclarativeTransitionManager::isRunning() const
+{
+    return d->transitionInstance && d->transitionInstance->isRunning();
+}
+
 void QDeclarativeTransitionManager::complete() 
 {
     d->applyBindings();
@@ -97,6 +102,8 @@ void QDeclarativeTransitionManager::complete()
 
     if (d->state) 
         static_cast<QDeclarativeStatePrivate*>(QObjectPrivate::get(d->state))->complete();
+
+    finished();
 }
 
 void QDeclarativeTransitionManagerPrivate::applyBindings()
@@ -116,6 +123,10 @@ void QDeclarativeTransitionManagerPrivate::applyBindings()
     bindingsList.clear();
 }
 
+void QDeclarativeTransitionManager::finished()
+{
+}
+
 void QDeclarativeTransitionManager::transition(const QList<QDeclarativeAction> &list,
                                       QDeclarativeTransition *transition)
 {
@@ -196,8 +207,11 @@ void QDeclarativeTransitionManager::transition(const QList<QDeclarativeAction> &
 
     if (transition) {
         QList<QDeclarativeProperty> touched;
-        d->transition = transition;
-        d->transition->prepare(applyList, touched, this);
+        QDeclarativeTransitionInstance *oldInstance = d->transitionInstance;
+        d->transitionInstance = transition->prepare(applyList, touched, this);
+        d->transitionInstance->start();
+        if (oldInstance && oldInstance != d->transitionInstance)
+            delete oldInstance;
 
         // Modify the action list to remove actions handled in the transition
         for (int ii = 0; ii < applyList.count(); ++ii) {
@@ -257,11 +271,8 @@ void QDeclarativeTransitionManager::transition(const QList<QDeclarativeAction> &
 
 void QDeclarativeTransitionManager::cancel()
 {
-    if (d->transition) {
-        // ### this could potentially trigger a complete in rare circumstances
-        d->transition->stop();
-        d->transition = 0;
-    }
+    if (d->transitionInstance && d->transitionInstance->isRunning())
+        d->transitionInstance->stop();
 
     for(int i = 0; i < d->bindingsList.count(); ++i) {
         QDeclarativeAction action = d->bindingsList[i];
-- 
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