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 QLAYOUT_H 41 #define QLAYOUT_H 42 43 #include <QtWidgets/qtwidgetsglobal.h> 44 #include <QtCore/qobject.h> 45 #include <QtWidgets/qlayoutitem.h> 46 #include <QtWidgets/qsizepolicy.h> 47 #include <QtCore/qrect.h> 48 #include <QtCore/qmargins.h> 49 50 #include <limits.h> 51 52 QT_BEGIN_NAMESPACE 53 54 55 class QLayout; 56 class QSize; 57 58 59 class QLayoutPrivate; 60 61 class Q_WIDGETS_EXPORT QLayout : public QObject, public QLayoutItem 62 { 63 Q_OBJECT 64 Q_DECLARE_PRIVATE(QLayout) 65 66 #if QT_DEPRECATED_SINCE(5, 13) 67 Q_PROPERTY(int margin READ margin WRITE setMargin) 68 #endif 69 Q_PROPERTY(int spacing READ spacing WRITE setSpacing) 70 Q_PROPERTY(SizeConstraint sizeConstraint READ sizeConstraint WRITE setSizeConstraint) 71 public: 72 enum SizeConstraint { 73 SetDefaultConstraint, 74 SetNoConstraint, 75 SetMinimumSize, 76 SetFixedSize, 77 SetMaximumSize, 78 SetMinAndMaxSize 79 }; 80 Q_ENUM(SizeConstraint) 81 82 QLayout(QWidget *parent); 83 QLayout(); 84 ~QLayout(); 85 86 #if QT_DEPRECATED_SINCE(5, 13) 87 int margin() const; 88 void setMargin(int); 89 #endif 90 91 int spacing() const; 92 void setSpacing(int); 93 94 void setContentsMargins(int left, int top, int right, int bottom); 95 void setContentsMargins(const QMargins &margins); 96 void getContentsMargins(int *left, int *top, int *right, int *bottom) const; 97 QMargins contentsMargins() const; 98 QRect contentsRect() const; 99 100 bool setAlignment(QWidget *w, Qt::Alignment alignment); 101 bool setAlignment(QLayout *l, Qt::Alignment alignment); 102 using QLayoutItem::setAlignment; 103 104 void setSizeConstraint(SizeConstraint); 105 SizeConstraint sizeConstraint() const; 106 void setMenuBar(QWidget *w); 107 QWidget *menuBar() const; 108 109 QWidget *parentWidget() const; 110 111 void invalidate() override; 112 QRect geometry() const override; 113 bool activate(); 114 void update(); 115 116 void addWidget(QWidget *w); 117 virtual void addItem(QLayoutItem *) = 0; 118 119 void removeWidget(QWidget *w); 120 void removeItem(QLayoutItem *); 121 122 Qt::Orientations expandingDirections() const override; 123 QSize minimumSize() const override; 124 QSize maximumSize() const override; 125 virtual void setGeometry(const QRect&) override; 126 virtual QLayoutItem *itemAt(int index) const = 0; 127 virtual QLayoutItem *takeAt(int index) = 0; 128 virtual int indexOf(QWidget *) const; 129 QT6_VIRTUAL int indexOf(QLayoutItem *) const; 130 virtual int count() const = 0; 131 bool isEmpty() const override; 132 QSizePolicy::ControlTypes controlTypes() const override; 133 134 QT6_VIRTUAL QLayoutItem *replaceWidget(QWidget *from, QWidget *to, 135 Qt::FindChildOptions options = Qt::FindChildrenRecursively); 136 137 int totalHeightForWidth(int w) const; 138 QSize totalMinimumSize() const; 139 QSize totalMaximumSize() const; 140 QSize totalSizeHint() const; 141 QLayout *layout() override; 142 143 void setEnabled(bool); 144 bool isEnabled() const; 145 146 147 static QSize closestAcceptableSize(const QWidget *w, const QSize &s); 148 149 protected: 150 void widgetEvent(QEvent *); 151 void childEvent(QChildEvent *e) override; 152 void addChildLayout(QLayout *l); 153 void addChildWidget(QWidget *w); 154 bool adoptLayout(QLayout *layout); 155 156 QRect alignmentRect(const QRect&) const; 157 protected: 158 QLayout(QLayoutPrivate &d, QLayout*, QWidget*); 159 160 private: 161 Q_DISABLE_COPY(QLayout) 162 163 static void activateRecursiveHelper(QLayoutItem *item); 164 165 friend class QApplicationPrivate; 166 friend class QWidget; 167 168 }; 169 170 QT_END_NAMESPACE 171 172 //### support old includes 173 #include <QtWidgets/qboxlayout.h> 174 #include <QtWidgets/qgridlayout.h> 175 176 #endif // QLAYOUT_H 177