1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtWidgets module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. 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The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QABSTRACTSLIDER_P_H 41 #define QABSTRACTSLIDER_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtWidgets/private/qtwidgetsglobal_p.h> 55 #include "QtCore/qbasictimer.h" 56 #include "QtCore/qelapsedtimer.h" 57 #include "private/qwidget_p.h" 58 #include "qstyle.h" 59 60 QT_REQUIRE_CONFIG(abstractslider); 61 62 QT_BEGIN_NAMESPACE 63 64 class QAbstractSliderPrivate : public QWidgetPrivate 65 { 66 Q_DECLARE_PUBLIC(QAbstractSlider) 67 public: 68 QAbstractSliderPrivate(); 69 ~QAbstractSliderPrivate(); 70 71 void setSteps(int single, int page); 72 73 int minimum, maximum, pageStep, value, position, pressValue; 74 75 /** 76 * Call effectiveSingleStep() when changing the slider value. 77 */ 78 int singleStep; 79 int singleStepFromItemView; // If we have itemViews we track the views preferred singleStep value. 80 bool viewMayChangeSingleStep; 81 82 float offset_accumulated; 83 uint tracking : 1; 84 uint blocktracking :1; 85 uint pressed : 1; 86 uint invertedAppearance : 1; 87 uint invertedControls : 1; 88 Qt::Orientation orientation; 89 90 QBasicTimer repeatActionTimer; 91 int repeatActionTime; 92 QAbstractSlider::SliderAction repeatAction; 93 94 #ifdef QT_KEYPAD_NAVIGATION 95 int origValue; 96 97 /** 98 */ 99 bool isAutoRepeating; 100 101 /** 102 * When we're auto repeating, we multiply singleStep with this value to 103 * get our effective step. 104 */ 105 qreal repeatMultiplier; 106 107 /** 108 * The time of when the first auto repeating key press event occurs. 109 */ 110 QElapsedTimer firstRepeat; 111 112 #endif 113 effectiveSingleStep()114 inline int effectiveSingleStep() const 115 { 116 return singleStep 117 #ifdef QT_KEYPAD_NAVIGATION 118 * repeatMultiplier 119 #endif 120 ; 121 } 122 void itemviewChangeSingleStep(int step); 123 bound(int val)124 virtual int bound(int val) const { return qMax(minimum, qMin(maximum, val)); } overflowSafeAdd(int add)125 inline int overflowSafeAdd(int add) const 126 { 127 int newValue = value + add; 128 if (add > 0 && newValue < value) 129 newValue = maximum; 130 else if (add < 0 && newValue > value) 131 newValue = minimum; 132 return newValue; 133 } setAdjustedSliderPosition(int position)134 inline void setAdjustedSliderPosition(int position) 135 { 136 Q_Q(QAbstractSlider); 137 if (q->style()->styleHint(QStyle::SH_Slider_StopMouseOverSlider, nullptr, q)) { 138 if ((position > pressValue - 2 * pageStep) && (position < pressValue + 2 * pageStep)) { 139 repeatAction = QAbstractSlider::SliderNoAction; 140 q->setSliderPosition(pressValue); 141 return; 142 } 143 } 144 q->triggerAction(repeatAction); 145 } 146 bool scrollByDelta(Qt::Orientation orientation, Qt::KeyboardModifiers modifiers, int delta); 147 }; 148 149 QT_END_NAMESPACE 150 151 #endif // QABSTRACTSLIDER_P_H 152