Introduce (private) QStyleAnimation

QStyleAnimation handles style animations in a generic fashion by
sending StyleAnimationUpdate events back to the animation target
instead of calling QWidget::update() directly. This decouples style
animations from widgets and makes it possible to run style animations
for QQuickItems (ie. the desktop components).

The next step is to add "QObject* QStyleOption::target" and use that
everywhere instead of the widget pointer passed to various QStyle
methods.

Change-Id: Ib963c54872805fc3f0123ff922f82c9962a68b90
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>

1 files changed, 110 insertions, 0 deletions

diff --git a/src/widgets/styles/qstyleanimation_p.h b/src/widgets/styles/qstyleanimation_p.h
new file mode 100644
index 0000000000..2c00048b7d
--- /dev/null
+++ b/src/widgets/styles/qstyleanimation_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtGui 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSTYLEANIMATION_P_H
+#define QSTYLEANIMATION_P_H
+
+#include "qabstractanimation.h"
+#include "qdatetime.h"
+
+QT_BEGIN_NAMESPACE
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists for the convenience of
+// qcommonstyle.cpp.  This header file may change from version to version
+// without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QT_NO_ANIMATION
+
+class QStyleAnimation : public QAbstractAnimation
+{
+    Q_OBJECT
+
+public:
+    QStyleAnimation(QObject *target);
+    virtual ~QStyleAnimation();
+
+    int duration() const;
+    QObject *target() const;
+
+    QTime startTime() const;
+    void setStartTime(const QTime &time);
+
+protected:
+    virtual bool isUpdateNeeded() const;
+    virtual void updateCurrentTime(int time);
+
+private:
+    QTime _startTime;
+};
+
+class QProgressStyleAnimation : public QStyleAnimation
+{
+    Q_OBJECT
+
+public:
+    QProgressStyleAnimation(int speed, QObject *target);
+
+    int animationStep() const;
+    int progressStep(int width) const;
+
+    int speed() const;
+    void setSpeed(int speed);
+
+protected:
+    bool isUpdateNeeded() const;
+
+private:
+    int _speed;
+    mutable int _step;
+};
+
+#endif // QT_NO_ANIMATION
+
+QT_END_NAMESPACE
+
+#endif // QSTYLEANIMATION_P_H