qgraphicslayout.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QGRAPHICSLAYOUT_H
#define QGRAPHICSLAYOUT_H
 
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/qgraphicslayoutitem.h>
 
QT_REQUIRE_CONFIG(graphicsview);
 
QT_BEGIN_NAMESPACE
 
class QGraphicsLayoutPrivate;
class QGraphicsLayoutItem;
class QGraphicsWidget;
 
class Q_WIDGETS_EXPORT QGraphicsLayout : public QGraphicsLayoutItem
{
public:
    QGraphicsLayout(QGraphicsLayoutItem *parent = nullptr);
    ~QGraphicsLayout();
 
    void setContentsMargins(qreal left, qreal top, qreal right, qreal bottom);
    void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const override;
 
    void activate();
    bool isActivated() const;
    virtual void invalidate();
    virtual void updateGeometry() override;
 
    virtual void widgetEvent(QEvent *e);
 
    virtual int count() const = 0;
    virtual QGraphicsLayoutItem *itemAt(int i) const = 0;
    virtual void removeAt(int index) = 0;
 
    static void setInstantInvalidatePropagation(bool enable);
    static bool instantInvalidatePropagation();
protected:
    QGraphicsLayout(QGraphicsLayoutPrivate &, QGraphicsLayoutItem *);
    void addChildLayoutItem(QGraphicsLayoutItem *layoutItem);
 
private:
    Q_DISABLE_COPY(QGraphicsLayout)
    Q_DECLARE_PRIVATE(QGraphicsLayout)
    friend class QGraphicsWidget;
};
 
#ifndef Q_QDOC
Q_DECLARE_INTERFACE(QGraphicsLayout, "org.qt-project.Qt.QGraphicsLayout")
#endif
 
QT_END_NAMESPACE
 
#endif