cannonfield.cpp Example File
tutorial/t9/cannonfield.cpp
/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <QPainter>
#include "cannonfield.h"
CannonField::CannonField(QWidget *parent)
: QWidget(parent)
{
currentAngle = 45;
setPalette(QPalette(QColor(250, 250, 200)));
setAutoFillBackground(true);
}
void CannonField::setAngle(int angle)
{
if (angle < 5)
angle = 5;
if (angle > 70)
angle = 70;
if (currentAngle == angle)
return;
currentAngle = angle;
update();
emit angleChanged(currentAngle);
}
void CannonField::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);
painter.setPen(Qt::NoPen);
painter.setBrush(Qt::blue);
painter.translate(0, rect().height());
painter.drawPie(QRect(-35, -35, 70, 70), 0, 90 * 16);
painter.rotate(-currentAngle);
painter.drawRect(QRect(30, -5, 20, 10));
}