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109 lines
2.4 KiB
109 lines
2.4 KiB
/*
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* Copyright (C) 2015-2022 Département de l'Instruction Publique (DIP-SEM)
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*
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* Copyright (C) 2013 Open Education Foundation
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*
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* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
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* l'Education Numérique en Afrique (GIP ENA)
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*
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* This file is part of OpenBoard.
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*
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* OpenBoard is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License,
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* with a specific linking exception for the OpenSSL project's
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* "OpenSSL" library (or with modified versions of it that use the
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* same license as the "OpenSSL" library).
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*
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* OpenBoard 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 General Public License
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* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "UBSpinningWheel.h"
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#include <QtGui>
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#include "core/memcheck.h"
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UBSpinningWheel::UBSpinningWheel(QWidget *parent)
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: QWidget(parent)
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, mPosition(9)
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, mTimerID(0)
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{
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// NOOP
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}
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UBSpinningWheel::~UBSpinningWheel()
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{
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stopAnimation();
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}
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QSize UBSpinningWheel::sizeHint() const
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{
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return QSize(16, 16);
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}
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void UBSpinningWheel::paintEvent(QPaintEvent *event)
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{
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Q_UNUSED(event);
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qreal side = qMin(width() / 2, height() / 2);
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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painter.translate(width() / 2, height() / 2);
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QPen pen;
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pen.setWidthF(side / 6.5);
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pen.setCapStyle(Qt::RoundCap);
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painter.setPen(pen);
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painter.rotate(30 * (mPosition.loadAcquire() % 12));
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for(int i = 0; i < 12; i++)
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{
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painter.drawLine(QPointF(side / 2, 0), QPointF(0.9 * side, 0));
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painter.rotate(30);
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QColor color = pen.color();
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color.setAlphaF(0.25 + (i / 16.));
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pen.setColor(color);
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painter.setPen(pen);
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}
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}
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void UBSpinningWheel::startAnimation()
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{
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if (mTimerID == 0)
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{
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mTimerID = startTimer(42);
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}
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}
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void UBSpinningWheel::stopAnimation()
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{
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if (mTimerID != 0)
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{
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killTimer(mTimerID);
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mTimerID = 0;
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}
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}
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void UBSpinningWheel::timerEvent(QTimerEvent *event)
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{
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Q_UNUSED(event);
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mPosition.ref();
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update();
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}
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