include/QtWidgets/qgraphicslayout.h

0001 // Copyright (C) 2016 The Qt Company Ltd.
0002 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
0003
0004 #ifndef QGRAPHICSLAYOUT_H
0005 #define QGRAPHICSLAYOUT_H
0006
0007 #include <QtWidgets/qtwidgetsglobal.h>
0008 #include <QtWidgets/qgraphicslayoutitem.h>
0009
0010 QT_REQUIRE_CONFIG(graphicsview);
0011
0012 QT_BEGIN_NAMESPACE
0013
0014 class QGraphicsLayoutPrivate;
0015 class QGraphicsLayoutItem;
0016 class QGraphicsWidget;
0017
0018 class Q_WIDGETS_EXPORT QGraphicsLayout : public QGraphicsLayoutItem
0019 {
0020 public:
0021     QGraphicsLayout(QGraphicsLayoutItem *parent = nullptr);
0022     ~QGraphicsLayout();
0023
0024     void setContentsMargins(qreal left, qreal top, qreal right, qreal bottom);
0025     void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const override;
0026
0027     void activate();
0028     bool isActivated() const;
0029     virtual void invalidate();
0030     virtual void updateGeometry() override;
0031
0032     virtual void widgetEvent(QEvent *e);
0033
0034     virtual int count() const = 0;
0035     virtual QGraphicsLayoutItem *itemAt(int i) const = 0;
0036     virtual void removeAt(int index) = 0;
0037
0038     static void setInstantInvalidatePropagation(bool enable);
0039     static bool instantInvalidatePropagation();
0040 protected:
0041     QGraphicsLayout(QGraphicsLayoutPrivate &, QGraphicsLayoutItem *);
0042     void addChildLayoutItem(QGraphicsLayoutItem *layoutItem);
0043
0044 private:
0045     Q_DISABLE_COPY(QGraphicsLayout)
0046     Q_DECLARE_PRIVATE(QGraphicsLayout)
0047     friend class QGraphicsWidget;
0048 };
0049
0050 #ifndef Q_QDOC
0051 Q_DECLARE_INTERFACE(QGraphicsLayout, "org.qt-project.Qt.QGraphicsLayout")
0052 #endif
0053
0054 QT_END_NAMESPACE
0055
0056 #endif