110 lines
2.4 KiB
C++
110 lines
2.4 KiB
C++
/*
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* Copyright 2007 by Zack Rusin <zack@kde.org>
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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 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 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 "shadowitem_p.h"
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#include "effects/blur.cpp"
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#include <QPainter>
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#include <QImage>
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#include <QDebug>
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namespace Plasma
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{
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ShadowItem::ShadowItem(QGraphicsItem *item)
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{
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setZValue(20);
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m_shadowParent = 0;
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m_offset = QPointF(12, 12);
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setShadowParent(item);
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}
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void ShadowItem::setShadowParent(QGraphicsItem *item)
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{
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m_shadowParent = item;
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adjustPosition();
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generate();
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}
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QGraphicsItem * ShadowItem::shadowParent() const
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{
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return m_shadowParent;
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}
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QSize ShadowItem::shadowedSize() const
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{
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QSize s = boundingRect().size().toSize();
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return s - QSize(32, 32);
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}
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void ShadowItem::generate()
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{
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if (!m_shadowParent) {
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return;
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}
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QPainterPath path = m_shadowParent->shape();
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QRectF rect = path.boundingRect();
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QSize s = rect.size().toSize() + QSize(30, 30);
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QImage img(s, QImage::Format_ARGB32_Premultiplied);
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img.fill(0);
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QPainter p(&img);
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p.translate(15, 15);
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p.setRenderHint(QPainter::Antialiasing);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillPath(path, Qt::gray);
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p.end();
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#ifdef DO_GLOW
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QImage blurred = img;
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expblur<16, 7>(img, 7);
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p.begin(&img);
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p.setCompositionMode(QPainter::CompositionMode_Plus);
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p.drawImage(0, 0, blurred);
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p.end();
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#else
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expblur<16, 7>(img, 7);
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#endif
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setPixmap(QPixmap::fromImage(img));
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}
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void ShadowItem::adjustPosition()
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{
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if (!m_shadowParent) {
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return;
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}
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setPos(m_shadowParent->pos() - m_offset);
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}
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void ShadowItem::setOffset(const QPointF &offset)
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{
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m_offset = offset;
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}
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QPointF ShadowItem::offset() const
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{
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return m_offset;
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}
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}
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