1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QABSTRACTSLIDER_P_H
5#define QABSTRACTSLIDER_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtWidgets/private/qtwidgetsglobal_p.h>
19#include "QtCore/qbasictimer.h"
20#include "QtCore/qelapsedtimer.h"
21#include "private/qwidget_p.h"
22#include "qstyle.h"
23
24QT_REQUIRE_CONFIG(abstractslider);
25
26QT_BEGIN_NAMESPACE
27
28class QAbstractSliderPrivate : public QWidgetPrivate
29{
30 Q_DECLARE_PUBLIC(QAbstractSlider)
31public:
32 QAbstractSliderPrivate();
33 ~QAbstractSliderPrivate();
34
35 void setSteps(int single, int page);
36
37 int minimum, maximum, pageStep, value, position, pressValue;
38
39 /**
40 * Call effectiveSingleStep() when changing the slider value.
41 */
42 int singleStep;
43 int singleStepFromItemView; // If we have itemViews we track the views preferred singleStep value.
44 bool viewMayChangeSingleStep;
45
46 float offset_accumulated;
47 uint tracking : 1;
48 uint blocktracking :1;
49 uint pressed : 1;
50 uint invertedAppearance : 1;
51 uint invertedControls : 1;
52 Qt::Orientation orientation;
53
54 QBasicTimer repeatActionTimer;
55 int repeatActionTime;
56 QAbstractSlider::SliderAction repeatAction;
57
58#ifdef QT_KEYPAD_NAVIGATION
59 int origValue;
60
61 /**
62 */
63 bool isAutoRepeating;
64
65 /**
66 * When we're auto repeating, we multiply singleStep with this value to
67 * get our effective step.
68 */
69 qreal repeatMultiplier;
70
71 /**
72 * The time of when the first auto repeating key press event occurs.
73 */
74 QElapsedTimer firstRepeat;
75
76#endif
77
78 inline int effectiveSingleStep() const
79 {
80 return singleStep
81#ifdef QT_KEYPAD_NAVIGATION
82 * repeatMultiplier
83#endif
84 ;
85 }
86 void itemviewChangeSingleStep(int step);
87
88 virtual int bound(int val) const { return qMax(a: minimum, b: qMin(a: maximum, b: val)); }
89 inline int overflowSafeAdd(int add) const
90 {
91 int newValue = value + add;
92 if (add > 0 && newValue < value)
93 newValue = maximum;
94 else if (add < 0 && newValue > value)
95 newValue = minimum;
96 return newValue;
97 }
98 inline void setAdjustedSliderPosition(int position)
99 {
100 Q_Q(QAbstractSlider);
101 if (q->style()->styleHint(stylehint: QStyle::SH_Slider_StopMouseOverSlider, opt: nullptr, widget: q)) {
102 if ((position > pressValue - 2 * pageStep) && (position < pressValue + 2 * pageStep)) {
103 repeatAction = QAbstractSlider::SliderNoAction;
104 q->setSliderPosition(pressValue);
105 return;
106 }
107 }
108 q->triggerAction(action: repeatAction);
109 }
110 bool scrollByDelta(Qt::Orientation orientation, Qt::KeyboardModifiers modifiers, int delta);
111};
112
113QT_END_NAMESPACE
114
115#endif // QABSTRACTSLIDER_P_H
116

source code of qtbase/src/widgets/widgets/qabstractslider_p.h