|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# cannonfield.cpp Example File
tutorial/t9/cannonfield.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the documentation of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
    ** included in the packaging of this file.  Alternatively you may (at
    ** your option) use any later version of the GNU General Public
    ** License if such license has been publicly approved by Trolltech ASA
    ** (or its successors, if any) and the KDE Free Qt Foundation. In
    ** addition, as a special exception, Trolltech gives you certain
    ** additional rights. These rights are described in the Trolltech GPL
    ** Exception version 1.2, which can be found at
    ** http://www.trolltech.com/products/qt/gplexception/ and in the file
    ** GPL_EXCEPTION.txt in this package.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
    ** you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** In addition, as a special exception, Trolltech, as the sole
    ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
    ** Integration plug-in the right for the Qt/Eclipse Integration to
    ** link to functionality provided by Qt Designer and its related
    ** libraries.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
    ** granted herein.
     **
     ** 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));
     }