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arrowpoint.cpp
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96 lines (85 loc) · 2.61 KB
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/*
*
* This file is part of QMapControl,
* an open-source cross-platform map widget
*
* Copyright (C) 2010 Jeffery MacEachern
* Based on CirclePoint code by Kai Winter
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with QMapControl. If not, see <http://www.gnu.org/licenses/>.
*
* Contact e-mail: kaiwinter@gmx.de
* Program URL : http://qmapcontrol.sourceforge.net/
*
*/
#include "arrowpoint.h"
namespace qmapcontrol
{
ArrowPoint::ArrowPoint(qreal x, qreal y, int sideLength, qreal heading, QString name,
qmapcontrol::Point::Alignment alignment, QPen *pen)
: Point(x, y, name, alignment)
{
size = QSize(sideLength, sideLength);
h = heading;
mypen = pen;
mypixmap = QPixmap(sideLength, sideLength);
drawArrow();
}
ArrowPoint::~ArrowPoint() { }
void ArrowPoint::setHeading(qreal heading)
{
h = heading;
drawArrow();
}
qreal ArrowPoint::getHeading() const
{
return h;
}
void ArrowPoint::setPen(QPen *pen)
{
mypen = pen;
drawArrow();
}
void ArrowPoint::drawArrow()
{
mypixmap = QPixmap(size);
mypixmap.fill(Qt::transparent);
QPainter painter(&mypixmap);
//#if !defined Q_WS_MAEMO_5 //FIXME Maemo has a bug - it will antialias our point out
//of existence
painter.setRenderHints(QPainter::Antialiasing);
//#endif
if (mypen)
{
painter.setPen(*mypen);
painter.setBrush(QBrush(mypen->color()));
}
else
{
painter.setBrush(QBrush(painter.pen().color()));
}
painter.setWindow(-(size.width() / 2), -(size.height() / 2), size.width(),
size.height());
QTransform transform;
transform.rotate(-h);
transform.scale(0.4, 0.75);
painter.setWorldTransform(transform);
QPolygon arrow;
arrow << QPoint(0, -(size.height() / 2));
arrow << QPoint(-(size.width() / 2), +(size.height() / 2));
arrow << QPoint(0, 0);
arrow << QPoint(+(size.width() / 2), +(size.height() / 2));
painter.drawPolygon(arrow);
}
}