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67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
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* Copyright 2013 Eike Hein <hein@kde.org>
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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 Library General Public License as
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* published by the Free Software Foundation; either version 2, 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 Library General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License 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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#include "fadeouteffect.h"
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#include <QtGui/qbrush.h>
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#include <QPainter>
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FadeOutEffect::FadeOutEffect(QObject *parent) : QGraphicsEffect(parent)
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, m_covered(0)
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{
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}
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FadeOutEffect::~FadeOutEffect()
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{
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}
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int FadeOutEffect::covered() const
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{
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return m_covered;
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}
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void FadeOutEffect::setCovered(int covered)
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{
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m_covered = covered;
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update();
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}
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void FadeOutEffect::draw(QPainter* painter)
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{
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QPixmap sourceItem = sourcePixmap(Qt::LogicalCoordinates);
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QPixmap pixmap(sourceItem.size());
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pixmap.fill(Qt::transparent);
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QLinearGradient gradient(0, qMax(0, pixmap.size().height() - m_covered - 8),
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0, pixmap.size().height() - m_covered);
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gradient.setColorAt(0, "black");
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gradient.setColorAt(1, Qt::transparent);
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QPainter itemPainter(&pixmap);
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itemPainter.drawPixmap(0, 0, sourceItem);
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itemPainter.setBrush(QBrush(gradient));
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itemPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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itemPainter.drawRect(QRect(0, 0, pixmap.size().width(), pixmap.size().height()));
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painter->drawPixmap(0, 0, pixmap);
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}
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#include "moc_fadeouteffect.cpp"
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