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distancefunction.cpp
00001 /*************************************************************************** 00002 distancefunction.cpp - description 00003 ------------------- 00004 begin : Mon Nov 11 2002 00005 copyright : (C) 2002 by Fungmeista 00006 email : mizunoami44@users.sourceforge.net 00007 ***************************************************************************/ 00008 00009 /*************************************************************************** 00010 * * 00011 * This program is free software; you can redistribute it and/or modify * 00012 * it under the terms of the GNU General Public License as published by * 00013 * the Free Software Foundation; either version 2 of the License, or * 00014 * (at your option) any later version. * 00015 * * 00016 ***************************************************************************/ 00017 00018 #include "distancefunction.h" 00019 00020 #include <cmath> 00021 00022 #include <qpainter.h> 00023 #include <qobject.h> 00024 00025 DistanceFunction::DistanceFunction(BasicGraph *graph, int expressions) : MathFunction(graph,expressions) 00026 { 00027 } 00028 DistanceFunction::~DistanceFunction() 00029 { 00030 00031 } 00032 00033 void DistanceFunction::calculate_and_draw(QPainter *painter) 00034 { 00035 double distance = sqrt( (arg1x-arg2x)* 00036 (arg1x-arg2x)+ 00037 (arg1y-arg2y)* 00038 (arg1y-arg2y) 00039 ); 00040 00041 QString s = QString(QObject::tr("Distance = %1")).arg(distance); 00042 setResult(s); 00043 00044 draw_stored(painter); 00045 } 00046 00047 void DistanceFunction::draw_stored(QPainter *painter) 00048 { 00049 painter->drawLine(lowerBounds.x(),lowerBounds.y(),upperBounds.x(),upperBounds.y()); 00050 }