52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/*
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* SPDX-FileCopyrightText: 2021 Arjen Hiemstra <ahiemstra@heimr.nl>
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifndef BACKGROUNDITEM_H
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#define BACKGROUNDITEM_H
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#include <QGraphicsItem>
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#include <lib/gwenviewlib_export.h>
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#include "abstractimageview.h"
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namespace Gwenview
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{
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/**
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* A QGraphicsItem subclass that draws the appropriate background for alpha images.
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*/
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class GWENVIEWLIB_EXPORT AlphaBackgroundItem : public QGraphicsItem
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{
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public:
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AlphaBackgroundItem(AbstractImageView *parent);
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~AlphaBackgroundItem() override;
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AbstractImageView::AlphaBackgroundMode mode() const;
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void setMode(AbstractImageView::AlphaBackgroundMode mode);
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QColor color();
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void setColor(const QColor &color);
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virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/) override;
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virtual QRectF boundingRect() const override;
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private:
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void createCheckBoardTexture();
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AbstractImageView *mParent;
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AbstractImageView::AlphaBackgroundMode mMode = AbstractImageView::AlphaBackgroundCheckBoard;
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QColor mColor = Qt::black;
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// This pixmap will be used to fill the background when mMode is
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// AlphaBackgroundCheckBoard.
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std::unique_ptr<QPixmap> mCheckBoardTexture;
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};
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}
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#endif // BACKGROUNDITEM_H
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