Make SmoothedAnimation and SpringAnimation smoothly transition again.

Fix regression introduced in Qt 5.0 when animation backend was
rewritten.

Task-number: QTBUG-36709
Change-Id: Ib8caa4bc6a38e3bb4c1d1d3961f775fdd2b342c7
Reviewed-by: Martin Jones <martin.jones@jollamobile.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/qml/animations/qcontinuinganimationgroupjob.cpp b/src/qml/animations/qcontinuinganimationgroupjob.cpp
new file mode 100644
index 0000000000..eb54b6e9aa
--- /dev/null
+++ b/src/qml/animations/qcontinuinganimationgroupjob.cpp
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Jolla Ltd.
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "private/qcontinuinganimationgroupjob_p.h"
+#include "private/qanimationjobutil_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QContinuingAnimationGroupJob::QContinuingAnimationGroupJob()
+    : QAnimationGroupJob()
+{
+}
+
+QContinuingAnimationGroupJob::~QContinuingAnimationGroupJob()
+{
+}
+
+void QContinuingAnimationGroupJob::updateCurrentTime(int /*currentTime*/)
+{
+    if (!firstChild())
+        return;
+
+    for (QAbstractAnimationJob *animation = firstChild(); animation; animation = animation->nextSibling()) {
+        if (animation->state() == state()) {
+            RETURN_IF_DELETED(animation->setCurrentTime(m_currentTime));
+        }
+    }
+}
+
+void QContinuingAnimationGroupJob::updateState(QAbstractAnimationJob::State newState,
+                                          QAbstractAnimationJob::State oldState)
+{
+    QAnimationGroupJob::updateState(newState, oldState);
+
+    switch (newState) {
+    case Stopped:
+        for (QAbstractAnimationJob *animation = firstChild(); animation; animation = animation->nextSibling())
+            animation->stop();
+        break;
+    case Paused:
+        for (QAbstractAnimationJob *animation = firstChild(); animation; animation = animation->nextSibling())
+            if (animation->isRunning())
+                animation->pause();
+        break;
+    case Running:
+        for (QAbstractAnimationJob *animation = firstChild(); animation; animation = animation->nextSibling()) {
+            resetUncontrolledAnimationFinishTime(animation);
+            animation->setDirection(m_direction);
+            animation->start();
+        }
+        break;
+    }
+}
+
+void QContinuingAnimationGroupJob::updateDirection(QAbstractAnimationJob::Direction direction)
+{
+    if (!isStopped()) {
+        for (QAbstractAnimationJob *animation = firstChild(); animation; animation = animation->nextSibling()) {
+            animation->setDirection(direction);
+        }
+    }
+}
+
+void QContinuingAnimationGroupJob::uncontrolledAnimationFinished(QAbstractAnimationJob *animation)
+{
+    Q_ASSERT(animation && (animation->duration() == -1));
+    int uncontrolledRunningCount = 0;
+
+    for (QAbstractAnimationJob *child = firstChild(); child; child = child->nextSibling()) {
+        if (child == animation)
+            setUncontrolledAnimationFinishTime(animation, animation->currentTime());
+        else if (uncontrolledAnimationFinishTime(child) == -1)
+            ++uncontrolledRunningCount;
+    }
+
+    if (uncontrolledRunningCount > 0)
+        return;
+
+    setUncontrolledAnimationFinishTime(this, currentTime());
+    stop();
+}
+
+QT_END_NAMESPACE
+