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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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 QGRAPHICSLAYOUTITEM_H 41 #define QGRAPHICSLAYOUTITEM_H 42 43 #include <QtWidgets/qtwidgetsglobal.h> 44 #include <QtCore/qscopedpointer.h> 45 #include <QtWidgets/qsizepolicy.h> 46 #include <QtGui/qevent.h> 47 48 QT_REQUIRE_CONFIG(graphicsview); 49 50 QT_BEGIN_NAMESPACE 51 52 class QGraphicsLayoutItemPrivate; 53 class QGraphicsItem; 54 class Q_WIDGETS_EXPORT QGraphicsLayoutItem 55 { 56 public: 57 QGraphicsLayoutItem(QGraphicsLayoutItem *parent = nullptr, bool isLayout = false); 58 virtual ~QGraphicsLayoutItem(); 59 60 void setSizePolicy(const QSizePolicy &policy); 61 void setSizePolicy(QSizePolicy::Policy hPolicy, QSizePolicy::Policy vPolicy, QSizePolicy::ControlType controlType = QSizePolicy::DefaultType); 62 QSizePolicy sizePolicy() const; 63 64 void setMinimumSize(const QSizeF &size); 65 inline void setMinimumSize(qreal w, qreal h); 66 QSizeF minimumSize() const; 67 void setMinimumWidth(qreal width); 68 inline qreal minimumWidth() const; 69 void setMinimumHeight(qreal height); 70 inline qreal minimumHeight() const; 71 72 void setPreferredSize(const QSizeF &size); 73 inline void setPreferredSize(qreal w, qreal h); 74 QSizeF preferredSize() const; 75 void setPreferredWidth(qreal width); 76 inline qreal preferredWidth() const; 77 void setPreferredHeight(qreal height); 78 inline qreal preferredHeight() const; 79 80 void setMaximumSize(const QSizeF &size); 81 inline void setMaximumSize(qreal w, qreal h); 82 QSizeF maximumSize() const; 83 void setMaximumWidth(qreal width); 84 inline qreal maximumWidth() const; 85 void setMaximumHeight(qreal height); 86 inline qreal maximumHeight() const; 87 88 virtual void setGeometry(const QRectF &rect); 89 QRectF geometry() const; 90 virtual void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const; 91 QRectF contentsRect() const; 92 93 QSizeF effectiveSizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const; 94 95 virtual void updateGeometry(); 96 97 QGraphicsLayoutItem *parentLayoutItem() const; 98 void setParentLayoutItem(QGraphicsLayoutItem *parent); 99 100 bool isLayout() const; 101 QGraphicsItem *graphicsItem() const; 102 bool ownedByLayout() const; 103 104 protected: 105 void setGraphicsItem(QGraphicsItem *item); 106 void setOwnedByLayout(bool ownedByLayout); 107 QGraphicsLayoutItem(QGraphicsLayoutItemPrivate &dd); 108 109 virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const = 0; 110 QScopedPointer<QGraphicsLayoutItemPrivate> d_ptr; 111 112 private: 113 QSizeF *effectiveSizeHints(const QSizeF &constraint) const; 114 Q_DECLARE_PRIVATE(QGraphicsLayoutItem) 115 116 friend class QGraphicsLayout; 117 }; 118 119 #ifndef Q_CLANG_QDOC 120 Q_DECLARE_INTERFACE(QGraphicsLayoutItem, "org.qt-project.Qt.QGraphicsLayoutItem") 121 #endif 122 123 inline void QGraphicsLayoutItem::setMinimumSize(qreal aw, qreal ah) 124 { setMinimumSize(QSizeF(aw, ah)); } 125 inline void QGraphicsLayoutItem::setPreferredSize(qreal aw, qreal ah) 126 { setPreferredSize(QSizeF(aw, ah)); } 127 inline void QGraphicsLayoutItem::setMaximumSize(qreal aw, qreal ah) 128 { setMaximumSize(QSizeF(aw, ah)); } 129 130 inline qreal QGraphicsLayoutItem::minimumWidth() const 131 { return effectiveSizeHint(Qt::MinimumSize).width(); } 132 inline qreal QGraphicsLayoutItem::minimumHeight() const 133 { return effectiveSizeHint(Qt::MinimumSize).height(); } 134 135 inline qreal QGraphicsLayoutItem::preferredWidth() const 136 { return effectiveSizeHint(Qt::PreferredSize).width(); } 137 inline qreal QGraphicsLayoutItem::preferredHeight() const 138 { return effectiveSizeHint(Qt::PreferredSize).height(); } 139 140 inline qreal QGraphicsLayoutItem::maximumWidth() const 141 { return effectiveSizeHint(Qt::MaximumSize).width(); } 142 inline qreal QGraphicsLayoutItem::maximumHeight() const 143 { return effectiveSizeHint(Qt::MaximumSize).height(); } 144 145 QT_END_NAMESPACE 146 147 #endif 148