src/gui/widgets/qabstractslider_p.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 15:50:13 +0300
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Revision: 201011 Kit: 201015
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QABSTRACTSLIDER_P_H
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#define QABSTRACTSLIDER_P_H
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//
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//  W A R N I N G
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//  -------------
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//
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// This file is not part of the Qt API.  It exists purely as an
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// implementation detail.  This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "QtCore/qbasictimer.h"
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#include "private/qwidget_p.h"
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#include "qstyle.h"
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QT_BEGIN_NAMESPACE
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class QAbstractSliderPrivate : public QWidgetPrivate
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{
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    Q_DECLARE_PUBLIC(QAbstractSlider)
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public:
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    QAbstractSliderPrivate();
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    ~QAbstractSliderPrivate();
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    void setSteps(int single, int page);
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    int minimum, maximum, pageStep, value, position, pressValue;
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    /**
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     * Call effectiveSingleStep() when changing the slider value.
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     */
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    int singleStep;
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    float offset_accumulated;
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    uint tracking : 1;
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    uint blocktracking :1;
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    uint pressed : 1;
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    uint invertedAppearance : 1;
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    uint invertedControls : 1;
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    Qt::Orientation orientation;
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    QBasicTimer repeatActionTimer;
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    int repeatActionTime;
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    QAbstractSlider::SliderAction repeatAction;
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#ifdef QT_KEYPAD_NAVIGATION
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    int origValue;
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    /**
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     */
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    bool isAutoRepeating;
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    /**
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     * When we're auto repeating, we multiply singleStep with this value to
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     * get our effective step.
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     */
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    qreal repeatMultiplier;
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    /**
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     * The time of when the first auto repeating key press event occurs.
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     */
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    QTime firstRepeat;
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#endif
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    inline int effectiveSingleStep() const
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    {
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        return singleStep
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#ifdef QT_KEYPAD_NAVIGATION
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        * repeatMultiplier
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#endif
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        ;
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    }
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    inline int bound(int val) const { return qMax(minimum, qMin(maximum, val)); }
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    inline int overflowSafeAdd(int add) const
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    {
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        int newValue = value + add;
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        if (add > 0 && newValue < value)
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            newValue = maximum;
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        else if (add < 0 && newValue > value)
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            newValue = minimum;
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        return newValue;
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    }
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    inline void setAdjustedSliderPosition(int position)
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    {
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        Q_Q(QAbstractSlider);
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        if (q->style()->styleHint(QStyle::SH_Slider_StopMouseOverSlider, 0, q)) {
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            if ((position > pressValue - 2 * pageStep) && (position < pressValue + 2 * pageStep)) {
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                repeatAction = QAbstractSlider::SliderNoAction;
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                q->setSliderPosition(pressValue);
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                return;
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            }
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        }
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        q->triggerAction(repeatAction);
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    }
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    bool scrollByDelta(Qt::Orientation orientation, Qt::KeyboardModifiers modifiers, int delta);
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};
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QT_END_NAMESPACE
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#endif // QABSTRACTSLIDER_P_H