OpenBoard/src/gui/UBCircleFrame.cpp

/*
 * Copyright (C) 2013 Open Education Foundation
 *
 * Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
 * l'Education Numérique en Afrique (GIP ENA)
 *
 * This file is part of OpenBoard.
 *
 * OpenBoard 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, version 3 of the License,
 * 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).
 *
 * OpenBoard 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
 */




#include "UBCircleFrame.h"
#include "core/memcheck.h"

UBCircleFrame::UBCircleFrame(QWidget* parent)
    : QFrame(parent)
{
    // NOOP
}

UBCircleFrame::~UBCircleFrame()
{
    // NOOP
}


void UBCircleFrame::paintEvent(QPaintEvent * event)
{
    Q_UNUSED(event);

    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.setBrush(QBrush(Qt::black));

    qreal diameter = (width() - 2) / maxPenWidth * currentPenWidth;
    diameter = qMax(2.0, diameter);
    qreal x = (width() - diameter) / 2;

    painter.drawEllipse(x, x, diameter, diameter);
}