qabstractslider_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QABSTRACTSLIDER_P_H
#define QABSTRACTSLIDER_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <QtWidgets/private/qtwidgetsglobal_p.h>
#include "QtCore/qbasictimer.h"
#include "QtCore/qelapsedtimer.h"
#include "private/qwidget_p.h"
#include "qstyle.h"
 
QT_REQUIRE_CONFIG(abstractslider);
 
QT_BEGIN_NAMESPACE
 
class QAbstractSliderPrivate : public QWidgetPrivate
{
    Q_DECLARE_PUBLIC(QAbstractSlider)
public:
    QAbstractSliderPrivate();
    ~QAbstractSliderPrivate();
 
    void setSteps(int single, int page);
 
    int minimum, maximum, pageStep, value, position, pressValue;
 
    int singleStep;
    int singleStepFromItemView; // If we have itemViews we track the views preferred singleStep value.
    bool viewMayChangeSingleStep;
 
    float offset_accumulated;
    uint tracking : 1;
    uint blocktracking :1;
    uint pressed : 1;
    uint invertedAppearance : 1;
    uint invertedControls : 1;
    Qt::Orientation orientation;
 
    QBasicTimer repeatActionTimer;
    int repeatActionTime;
    QAbstractSlider::SliderAction repeatAction;
 
#ifdef QT_KEYPAD_NAVIGATION
    int origValue;
 
    bool isAutoRepeating;
 
    qreal repeatMultiplier;
 
    QElapsedTimer firstRepeat;
 
#endif
 
    inline int effectiveSingleStep() const
    {
        return singleStep
#ifdef QT_KEYPAD_NAVIGATION
        * repeatMultiplier
#endif
        ;
    }
    void itemviewChangeSingleStep(int step);
 
    virtual int bound(int val) const { return qMax(minimum, qMin(maximum, val)); }
    inline int overflowSafeAdd(int add) const
    {
        int newValue = value + add;
        if (add > 0 && newValue < value)
            newValue = maximum;
        else if (add < 0 && newValue > value)
            newValue = minimum;
        return newValue;
    }
    inline void setAdjustedSliderPosition(int position)
    {
        Q_Q(QAbstractSlider);
        if (q->style()->styleHint(QStyle::SH_Slider_StopMouseOverSlider, nullptr, q)) {
            if ((position > pressValue - 2 * pageStep) && (position < pressValue + 2 * pageStep)) {
                repeatAction = QAbstractSlider::SliderNoAction;
                q->setSliderPosition(pressValue);
                return;
            }
        }
        q->triggerAction(repeatAction);
    }
    bool scrollByDelta(Qt::Orientation orientation, Qt::KeyboardModifiers modifiers, int delta);
};
 
QT_END_NAMESPACE
 
#endif // QABSTRACTSLIDER_P_H