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/*
Copyright (C) 2009 Adenilson Cavalcanti <adenilson.silva@idnt.org.br>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "widgetsnapshot_p.h"
#include <QPainter>
#include <QImage>
#include <QPixmap>
#include <QStyleOptionGraphicsItem>
#include <QDebug>
static const int RECURSION_MAX = 20;
namespace Plasma
{
WidgetSnapShot::WidgetSnapShot(QGraphicsItem *parent)
: QGraphicsWidget(parent),
m_iconBig(false),
stack(0),
m_target(0)
{
}
WidgetSnapShot::~WidgetSnapShot()
{
}
void WidgetSnapShot::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget);
painter->setRenderHint(QPainter::Antialiasing);
painter->drawPixmap(option->exposedRect, m_snapShot, option->exposedRect);
}
void WidgetSnapShot::paintSubChildren(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QGraphicsItem *target)
{
++stack;
QList<QGraphicsItem *> list = target->childItems();
QGraphicsItem *tmp;
if (list.size() > 0) {
for (int i = 0; i < list.size(); ++i) {
tmp = list.value(i);
if ((tmp->childItems().size() > 0) && (stack < RECURSION_MAX)) {
paintSubChildren(painter, option, tmp);
}
if (tmp->isVisible()) {
tmp->paint(painter, option, 0);
}
}
}
--stack;
}
void WidgetSnapShot::setTarget(QGraphicsWidget *target)
{
stack = 0;
m_target = target;
setParentItem(target);
QSize size(target->size().toSize());
m_iconBig = false;
if (m_target->property("iconRepresentation").isValid()) {
m_iconBig = true;
m_snapShot = QPixmap::fromImage(
m_target->property("iconRepresentation").value<QImage>());
if ((m_snapShot.height() > 0) && (m_snapShot.width() > 0)) {
resize(m_snapShot.size());
setTransformOriginPoint(target->geometry().center());
return;
}
}
resize(target->size());
m_snapShot = QPixmap(size);
m_snapShot.fill(Qt::transparent);
QPainter painter(&m_snapShot);
painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
painter.fillRect(target->rect(), Qt::transparent);
QStyleOptionGraphicsItem style;
style.exposedRect = target->boundingRect();
style.rect = target->rect().toRect();
target->paint(&painter, &style, 0);
paintSubChildren(&painter, &style, target);
painter.end();
setTransformOriginPoint(geometry().center());
}
QGraphicsWidget *WidgetSnapShot::target() const
{
return m_target;
}
bool WidgetSnapShot::isIconBigger() const
{
return m_iconBig;
}
QPixmap WidgetSnapShot::snapShot() const
{
return m_snapShot;
}
}
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