64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#ifndef ABSTRACTSCROLLAREA_H
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#define ABSTRACTSCROLLAREA_H
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#include "gvbwidget.h"
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class ScrollBar;
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class QGraphicsGridLayout;
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class AbstractScrollArea : public GvbWidget
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{
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Q_OBJECT
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public:
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AbstractScrollArea(QGraphicsWidget *parent = nullptr);
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~AbstractScrollArea();
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public:
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void setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy policy);
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void setVerticalScrollBarPolicy(Qt::ScrollBarPolicy policy);
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Qt::ScrollBarPolicy verticalScrollBarPolicy() const;
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Qt::ScrollBarPolicy horizontalScrollBarPolicy() const;
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QGraphicsWidget *viewport() const;
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void setViewport(QGraphicsWidget *viewport);
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ScrollBar *verticalScrollBar() const;
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ScrollBar *horizontalScrollBar() const;
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signals:
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void viewportChanged(QGraphicsWidget *viewport);
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protected:
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virtual bool event(QEvent *e);
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virtual void scrollContentsBy(qreal dx, qreal dy);
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private slots:
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void verticalScrollStart();
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void verticalScroll(qreal);
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void horizontalScrollStart();
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void horizontalScroll(qreal);
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private:
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void adjustScrollBars();
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QGraphicsWidget *m_viewport;
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ScrollBar *m_horizontalScrollBar;
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ScrollBar *m_verticalScrollBar;
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Qt::ScrollBarPolicy m_verticalScrollBarPolicy;
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Qt::ScrollBarPolicy m_horizontalScrollBarPolicy;
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qreal m_prevHorizontalValue;
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qreal m_prevVerticalValue;
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};
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#endif // ABSTRACTSCROLLAREA_H
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