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/*
* Copyright (C) 2012 Webdoc SA
*
* This file is part of Open-Sankoré.
*
* Open-Sankoré is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation, version 2,
* with a specific linking exception for the OpenSSL project's
* "OpenSSL" library (or with modified versions of it that use the
* same license as the "OpenSSL" library).
*
* Open-Sankoré 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with Open-Sankoré; if not, see
* <http://www.gnu.org/licenses/>.
*/
#include "UBSpinningWheel.h"
#include <QtGui>
#include "core/memcheck.h"
UBSpinningWheel::UBSpinningWheel(QWidget *parent)
: QWidget(parent)
, mPosition(9)
, mTimerID(0)
{
// NOOP
}
UBSpinningWheel::~UBSpinningWheel()
{
stopAnimation();
}
QSize UBSpinningWheel::sizeHint() const
{
return QSize(16, 16);
}
void UBSpinningWheel::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
qreal side = qMin(width() / 2, height() / 2);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);
QPen pen;
pen.setWidthF(side / 6.5);
pen.setCapStyle(Qt::RoundCap);
painter.setPen(pen);
painter.rotate(30 * (mPosition % 12));
for(int i = 0; i < 12; i++)
{
painter.drawLine(QPointF(side / 2, 0), QPointF(0.9 * side, 0));
painter.rotate(30);
QColor color = pen.color();
color.setAlphaF(0.25 + (i / 16.));
pen.setColor(color);
painter.setPen(pen);
}
}
void UBSpinningWheel::startAnimation()
{
if (mTimerID == 0)
{
mTimerID = startTimer(42);
}
}
void UBSpinningWheel::stopAnimation()
{
if (mTimerID != 0)
{
killTimer(mTimerID);
mTimerID = 0;
}
}
void UBSpinningWheel::timerEvent(QTimerEvent *event)
{
Q_UNUSED(event);
mPosition.ref();
update();
}