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/*
* Copyright 2009 Ben Boeckel <MathStuf@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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Header include
#include "MapGrid.h"
// Qt includes
#include <QtGui/QPainter>
// Standard includes
#include <climits>
using namespace Sigmodr::Widgets;
MapGrid::MapGrid(const int fringe) :
m_fringe(fringe),
m_gridSize(0)
{
setZValue(INT_MIN);
}
QRectF MapGrid::boundingRect() const
{
return m_rect.adjusted(-m_fringe, -m_fringe, m_fringe, m_fringe);
}
void MapGrid::paint(QPainter* painter, const QStyleOptionGraphicsItem* options, QWidget* widget)
{
Q_UNUSED(options)
Q_UNUSED(widget)
painter->save();
if (m_gridSize)
{
painter->save();
painter->setOpacity(.25);
const int top = m_rect.top() - m_fringe;
const int bottom = m_rect.bottom() + m_fringe;
const int left = m_rect.left() - m_fringe;
const int right = m_rect.right() + m_fringe;
for (int i = m_rect.left(); i < m_rect.right(); i += m_gridSize)
painter->drawLine(i, top, i, bottom);
painter->drawLine(m_rect.right(), top, m_rect.right(), bottom);
for (int i = m_rect.top(); i < m_rect.bottom(); i += m_gridSize)
painter->drawLine(left, i, right, i);
painter->drawLine(left, m_rect.bottom(), right, m_rect.bottom());
painter->setOpacity(1);
painter->restore();
}
painter->setPen(QPen(Qt::red, 3));
painter->drawRect(m_rect);
painter->restore();
}
void MapGrid::setRect(const QRectF& rect)
{
prepareGeometryChange();
m_rect = rect;
update();
}
void MapGrid::setGridSize(const int gridSize)
{
m_gridSize = gridSize;
update();
}
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