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 QGRAPHICSLAYOUT_H 41 #define QGRAPHICSLAYOUT_H 42 43 #include <QtWidgets/qtwidgetsglobal.h> 44 #include <QtWidgets/qgraphicslayoutitem.h> 45 46 QT_REQUIRE_CONFIG(graphicsview); 47 48 QT_BEGIN_NAMESPACE 49 50 class QGraphicsLayoutPrivate; 51 class QGraphicsLayoutItem; 52 class QGraphicsWidget; 53 54 class Q_WIDGETS_EXPORT QGraphicsLayout : public QGraphicsLayoutItem 55 { 56 public: 57 QGraphicsLayout(QGraphicsLayoutItem *parent = nullptr); 58 ~QGraphicsLayout(); 59 60 void setContentsMargins(qreal left, qreal top, qreal right, qreal bottom); 61 void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const override; 62 63 void activate(); 64 bool isActivated() const; 65 virtual void invalidate(); 66 virtual void updateGeometry() override; 67 68 virtual void widgetEvent(QEvent *e); 69 70 virtual int count() const = 0; 71 virtual QGraphicsLayoutItem *itemAt(int i) const = 0; 72 virtual void removeAt(int index) = 0; 73 74 static void setInstantInvalidatePropagation(bool enable); 75 static bool instantInvalidatePropagation(); 76 protected: 77 QGraphicsLayout(QGraphicsLayoutPrivate &, QGraphicsLayoutItem *); 78 void addChildLayoutItem(QGraphicsLayoutItem *layoutItem); 79 80 private: 81 Q_DISABLE_COPY(QGraphicsLayout) 82 Q_DECLARE_PRIVATE(QGraphicsLayout) 83 friend class QGraphicsWidget; 84 }; 85 86 #ifndef Q_CLANG_QDOC 87 Q_DECLARE_INTERFACE(QGraphicsLayout, "org.qt-project.Qt.QGraphicsLayout") 88 #endif 89 90 QT_END_NAMESPACE 91 92 #endif 93