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/***************************************************************************
* *
* This file is part of the Fotowall project, *
* http://www.enricoros.com/opensource/fotowall *
* *
* Copyright (C) 2007-2009 by Enrico Ros <enrico.ros@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "HighlightItem.h"
#include "Shared/RenderOpts.h"
#include <QGraphicsScene>
#include <QPainter>
#include <QTimerEvent>
#include <math.h>
HighlightItem::HighlightItem(QGraphicsItem * parent)
: QGraphicsItem(parent)
, m_unset(true)
, m_xn(0)
, m_yn(0)
, m_phase(0)
, m_radius(1)
, m_closing(false)
{
m_timer.start(30, this);
}
void HighlightItem::setPos(double x, double y)
{
QRectF pr = parentRect();
m_xn = (x - pr.left()) / (double)pr.width();
m_yn = (y - pr.top()) / (double)pr.height();
reposition();
}
void HighlightItem::setPosF(double xn, double yn)
{
m_xn = xn;
m_yn = yn;
reposition();
}
void HighlightItem::reposition(const QRectF & rect)
{
QRectF pr = rect.isNull() ? parentRect() : rect;
QGraphicsItem::setPos((int)(pr.left() + m_xn * pr.width()), (int)(pr.top() + m_yn * pr.height()));
}
void HighlightItem::deleteAfterAnimation()
{
m_closing = true;
}
QRectF HighlightItem::boundingRect() const
{
return QRectF(-m_radius, -m_radius, 2 * m_radius, 2 * m_radius);
}
void HighlightItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/)
{
if (RenderOpts::HQRendering)
return;
int alpha = qBound(0, (100 - (int)m_radius) * 3, 255);
painter->setRenderHint(QPainter::Antialiasing, true);
painter->setPen(QPen(QColor(255, 255, 255, alpha), 3));
painter->drawEllipse(boundingRect().adjusted(1, 1, -1, -1));
}
void HighlightItem::timerEvent(QTimerEvent * event)
{
if (event->timerId() != m_timer.timerId())
return QObject::timerEvent(event);
// advance phase
m_phase++;
// resize
prepareGeometryChange();
m_radius = sqrt((double)(m_phase * 200));
update();
// wrap around @50 {rad=100}
if (m_phase > 50) {
m_phase = 0;
if (m_closing) {
m_timer.stop();
deleteLater();
}
}
}
QRectF HighlightItem::parentRect() const
{
if (parentItem())
return parentItem()->boundingRect();
else if (scene())
return scene()->sceneRect();
return QRectF(0, 0, 10, 10);
}
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