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105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
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Copyright (C) 2009 Adenilson Cavalcanti <adenilson.silva@idnt.org.br>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "widgetsnapshot_p.h"
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#include <QPainter>
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#include <QImage>
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#include <QPixmap>
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#include <QStyleOptionGraphicsItem>
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#include <QDebug>
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static const int RECURSION_MAX = 20;
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namespace Plasma
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{
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WidgetSnapShot::WidgetSnapShot(QGraphicsItem *parent)
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: QGraphicsWidget(parent),
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stack(0),
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m_target(nullptr)
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{
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}
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void WidgetSnapShot::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(widget);
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painter->setRenderHint(QPainter::Antialiasing);
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painter->drawPixmap(option->exposedRect, m_snapShot, option->exposedRect);
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}
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void WidgetSnapShot::paintSubChildren(QPainter *painter,
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const QStyleOptionGraphicsItem *option,
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QGraphicsItem *target)
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{
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++stack;
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QList<QGraphicsItem *> list = target->childItems();
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QGraphicsItem *tmp;
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if (list.size() > 0) {
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for (int i = 0; i < list.size(); ++i) {
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tmp = list.value(i);
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if ((tmp->childItems().size() > 0) && (stack < RECURSION_MAX)) {
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paintSubChildren(painter, option, tmp);
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}
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if (tmp->isVisible()) {
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tmp->paint(painter, option, 0);
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}
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}
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}
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--stack;
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}
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void WidgetSnapShot::setTarget(QGraphicsWidget *target)
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{
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stack = 0;
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m_target = target;
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setParentItem(target);
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QSize size(target->size().toSize());
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resize(target->size());
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m_snapShot = QPixmap(size);
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m_snapShot.fill(Qt::transparent);
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QPainter painter(&m_snapShot);
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painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
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painter.fillRect(target->rect(), Qt::transparent);
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QStyleOptionGraphicsItem style;
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style.exposedRect = target->boundingRect();
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style.rect = target->rect().toRect();
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target->paint(&painter, &style, 0);
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paintSubChildren(&painter, &style, target);
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painter.end();
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setTransformOriginPoint(geometry().center());
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}
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QGraphicsWidget *WidgetSnapShot::target() const
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{
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return m_target;
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}
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QPixmap WidgetSnapShot::snapShot() const
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{
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return m_snapShot;
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}
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}
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