qabstractscrollarea.h 5.4 KB

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  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
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  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. #ifndef QABSTRACTSCROLLAREA_H
  40. #define QABSTRACTSCROLLAREA_H
  41. #include <QtWidgets/qframe.h>
  42. QT_BEGIN_NAMESPACE
  43. #ifndef QT_NO_SCROLLAREA
  44. class QMargins;
  45. class QScrollBar;
  46. class QAbstractScrollAreaPrivate;
  47. class Q_WIDGETS_EXPORT QAbstractScrollArea : public QFrame
  48. {
  49. Q_OBJECT
  50. Q_PROPERTY(Qt::ScrollBarPolicy verticalScrollBarPolicy READ verticalScrollBarPolicy WRITE setVerticalScrollBarPolicy)
  51. Q_PROPERTY(Qt::ScrollBarPolicy horizontalScrollBarPolicy READ horizontalScrollBarPolicy WRITE setHorizontalScrollBarPolicy)
  52. Q_PROPERTY(SizeAdjustPolicy sizeAdjustPolicy READ sizeAdjustPolicy WRITE setSizeAdjustPolicy)
  53. public:
  54. explicit QAbstractScrollArea(QWidget *parent = Q_NULLPTR);
  55. ~QAbstractScrollArea();
  56. enum SizeAdjustPolicy {
  57. AdjustIgnored,
  58. AdjustToContentsOnFirstShow,
  59. AdjustToContents
  60. };
  61. Q_ENUM(SizeAdjustPolicy)
  62. Qt::ScrollBarPolicy verticalScrollBarPolicy() const;
  63. void setVerticalScrollBarPolicy(Qt::ScrollBarPolicy);
  64. QScrollBar *verticalScrollBar() const;
  65. void setVerticalScrollBar(QScrollBar *scrollbar);
  66. Qt::ScrollBarPolicy horizontalScrollBarPolicy() const;
  67. void setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy);
  68. QScrollBar *horizontalScrollBar() const;
  69. void setHorizontalScrollBar(QScrollBar *scrollbar);
  70. QWidget *cornerWidget() const;
  71. void setCornerWidget(QWidget *widget);
  72. void addScrollBarWidget(QWidget *widget, Qt::Alignment alignment);
  73. QWidgetList scrollBarWidgets(Qt::Alignment alignment);
  74. QWidget *viewport() const;
  75. void setViewport(QWidget *widget);
  76. QSize maximumViewportSize() const;
  77. QSize minimumSizeHint() const Q_DECL_OVERRIDE;
  78. QSize sizeHint() const Q_DECL_OVERRIDE;
  79. virtual void setupViewport(QWidget *viewport);
  80. SizeAdjustPolicy sizeAdjustPolicy() const;
  81. void setSizeAdjustPolicy(SizeAdjustPolicy policy);
  82. protected:
  83. QAbstractScrollArea(QAbstractScrollAreaPrivate &dd, QWidget *parent = Q_NULLPTR);
  84. void setViewportMargins(int left, int top, int right, int bottom);
  85. void setViewportMargins(const QMargins &margins);
  86. QMargins viewportMargins() const;
  87. bool eventFilter(QObject *, QEvent *) Q_DECL_OVERRIDE;
  88. bool event(QEvent *) Q_DECL_OVERRIDE;
  89. virtual bool viewportEvent(QEvent *);
  90. void resizeEvent(QResizeEvent *) Q_DECL_OVERRIDE;
  91. void paintEvent(QPaintEvent *) Q_DECL_OVERRIDE;
  92. void mousePressEvent(QMouseEvent *) Q_DECL_OVERRIDE;
  93. void mouseReleaseEvent(QMouseEvent *) Q_DECL_OVERRIDE;
  94. void mouseDoubleClickEvent(QMouseEvent *) Q_DECL_OVERRIDE;
  95. void mouseMoveEvent(QMouseEvent *) Q_DECL_OVERRIDE;
  96. #ifndef QT_NO_WHEELEVENT
  97. void wheelEvent(QWheelEvent *) Q_DECL_OVERRIDE;
  98. #endif
  99. #ifndef QT_NO_CONTEXTMENU
  100. void contextMenuEvent(QContextMenuEvent *) Q_DECL_OVERRIDE;
  101. #endif
  102. #ifndef QT_NO_DRAGANDDROP
  103. void dragEnterEvent(QDragEnterEvent *) Q_DECL_OVERRIDE;
  104. void dragMoveEvent(QDragMoveEvent *) Q_DECL_OVERRIDE;
  105. void dragLeaveEvent(QDragLeaveEvent *) Q_DECL_OVERRIDE;
  106. void dropEvent(QDropEvent *) Q_DECL_OVERRIDE;
  107. #endif
  108. void keyPressEvent(QKeyEvent *) Q_DECL_OVERRIDE;
  109. virtual void scrollContentsBy(int dx, int dy);
  110. virtual QSize viewportSizeHint() const;
  111. private:
  112. Q_DECLARE_PRIVATE(QAbstractScrollArea)
  113. Q_DISABLE_COPY(QAbstractScrollArea)
  114. Q_PRIVATE_SLOT(d_func(), void _q_hslide(int))
  115. Q_PRIVATE_SLOT(d_func(), void _q_vslide(int))
  116. Q_PRIVATE_SLOT(d_func(), void _q_showOrHideScrollBars())
  117. friend class QStyleSheetStyle;
  118. friend class QWidgetPrivate;
  119. };
  120. #endif // QT_NO_SCROLLAREA
  121. QT_END_NAMESPACE
  122. #endif // QABSTRACTSCROLLAREA_H