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. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. 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 QSCROLLBAR_H 41 #define QSCROLLBAR_H 42 43 #include <QtWidgets/qtwidgetsglobal.h> 44 #include <QtWidgets/qwidget.h> 45 46 #include <QtWidgets/qabstractslider.h> 47 48 QT_REQUIRE_CONFIG(scrollbar); 49 50 QT_BEGIN_NAMESPACE 51 52 class QScrollBarPrivate; 53 class QStyleOptionSlider; 54 55 class Q_WIDGETS_EXPORT QScrollBar : public QAbstractSlider 56 { 57 Q_OBJECT 58 public: 59 explicit QScrollBar(QWidget *parent = nullptr); 60 explicit QScrollBar(Qt::Orientation, QWidget *parent = nullptr); 61 ~QScrollBar(); 62 63 QSize sizeHint() const override; 64 bool event(QEvent *event) override; 65 66 protected: 67 #if QT_CONFIG(wheelevent) 68 void wheelEvent(QWheelEvent *) override; 69 #endif 70 void paintEvent(QPaintEvent *) override; 71 void mousePressEvent(QMouseEvent *) override; 72 void mouseReleaseEvent(QMouseEvent *) override; 73 void mouseMoveEvent(QMouseEvent *) override; 74 void hideEvent(QHideEvent*) override; 75 void sliderChange(SliderChange change) override; 76 #ifndef QT_NO_CONTEXTMENU 77 void contextMenuEvent(QContextMenuEvent *) override; 78 #endif 79 void initStyleOption(QStyleOptionSlider *option) const; 80 81 82 private: 83 friend class QAbstractScrollAreaPrivate; 84 friend Q_WIDGETS_EXPORT QStyleOptionSlider qt_qscrollbarStyleOption(QScrollBar *scrollBar); 85 86 Q_DISABLE_COPY(QScrollBar) 87 Q_DECLARE_PRIVATE(QScrollBar) 88 #if QT_CONFIG(itemviews) 89 friend class QTableView; 90 friend class QTreeViewPrivate; 91 friend class QCommonListViewBase; 92 friend class QListModeViewBase; 93 friend class QAbstractItemView; 94 #endif 95 }; 96 97 QT_END_NAMESPACE 98 99 #endif // QSCROLLBAR_H 100