mirror of
https://invent.kde.org/system/dolphin
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91 lines
3 KiB
C++
91 lines
3 KiB
C++
/***************************************************************************
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* Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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***************************************************************************/
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#ifndef PIXMAPVIEWER_H
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#define PIXMAPVIEWER_H
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#include <QWidget>
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#include <QPixmap>
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#include <QQueue>
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#include <QTimeLine>
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class QPaintEvent;
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/**
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* @brief Widget which shows a pixmap centered inside the boundaries.
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*
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* When the pixmap is changed, a smooth transition is done from the old pixmap
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* to the new pixmap.
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*/
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class PixmapViewer : public QWidget
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{
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Q_OBJECT
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public:
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enum Transition
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{
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/** No transition is done when the pixmap is changed. */
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NoTransition,
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/**
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* The old pixmap is replaced by the new pixmap and the size is
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* adjusted smoothly to the size of the new pixmap.
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*/
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DefaultTransition,
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/**
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* If the old pixmap and the new pixmap have the same content, but
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* a different size it is recommended to use Transition::SizeTransition
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* instead of Transition::DefaultTransition. In this case it is assured
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* that the larger pixmap is used for downscaling, which leads
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* to an improved scaling output.
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*/
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SizeTransition
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};
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explicit PixmapViewer(QWidget* parent,
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Transition transition = DefaultTransition);
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virtual ~PixmapViewer();
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void setPixmap(const QPixmap& pixmap);
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const QPixmap& pixmap() const;
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protected:
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virtual void paintEvent(QPaintEvent* event);
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private Q_SLOTS:
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void checkPendingPixmaps();
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private:
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QPixmap m_pixmap;
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QPixmap m_oldPixmap;
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QQueue<QPixmap> m_pendingPixmaps;
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QTimeLine m_animation;
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Transition m_transition;
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int m_animationStep;
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};
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inline const QPixmap& PixmapViewer::pixmap() const
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{
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return m_pixmap;
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}
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#endif
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