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	Search   mathfunction.cpp /*************************************************************************** mathfunction.cpp - description ------------------- begin : Mon Nov 11 2002-03 copyright : (C) 2002 by Fungmeista email : mizunoami44@users.sourceforge.net ***************************************************************************/ /*************************************************************************** * * * 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 2 of the License, or * * (at your option) any later version. * * * ***************************************************************************/ #include "mathfunction.h" #include <qapplication.h> //used to continue processing events while waiting for the points #include <qpoint.h> #include <qpainter.h> #include "expressiongraph.h" #include "fungparser.h" MathFunction::MathFunction(BasicGraph *graph, int expressions) : expression_count(expressions), expression(0), expression2(0) { mouseClicks = 0; resultString = QString(); _active = false; basicgraph = graph; upperBounds = QPoint(); lowerBounds = QPoint(); } MathFunction::~MathFunction() { } void MathFunction::setResult( QString & s ) { resultString = s; } int MathFunction::toPixelXCoord(double x_coordinate) { return basicgraph->toPixelXCoord(x_coordinate); } int MathFunction::toPixelYCoord(double y_coordinate) { return basicgraph->toPixelYCoord(y_coordinate); } double MathFunction::toGraphXCoord(double x_coordinate) { return basicgraph->toGraphXCoord(x_coordinate); } double MathFunction::toGraphYCoord(double y_coordinate) { return basicgraph->toGraphYCoord(y_coordinate); } double MathFunction::animatorValue() { return static_cast<ExpressionGraph*>(basicgraph)->animatorValue(); } void MathFunction::getTwoPoints() { qApp->processOneEvent(); if (mouseClicks == CANCEL){return;} if (mouseClicks == GETLOWERBOUND){getTwoPoints();return;} if (mouseClicks == GOTLOWERBOUND) { lowerBounds.setX( lastClick.x()); lowerBounds.setY( lastClick.y()); arg1 = beta; arg1x = beta; arg2y = beta2; basicgraph->repaint(false); mouseClicks++; } if (mouseClicks == GETUPPERBOUND){getTwoPoints();return;} if (mouseClicks == GOTUPPERBOUND) { upperBounds.setX(lastClick.x()); upperBounds.setY(lastClick.y()); arg2 = beta; arg2x = beta; arg2y = beta2; //if (upperBounds.x() <= lowerBounds.x()){basicgraph->repaint(false); return;} if (expression){basicgraph->setTrace(false);} basicgraph->repaint(false); mouseClicks++; } if (mouseClicks == CALCULATE){basicgraph->repaint(false); mouseClicks++;} if (mouseClicks == CLICKTOCONTINUE){getTwoPoints(); return;} basicgraph->repaint(false); } void MathFunction::sendClick(QMouseEvent *, double arg, double arg2) { lastClick = basicgraph->getMousePoint(); beta = arg; beta2 = arg2; mouseClicks++; } void MathFunction::drawFunction(QPainter *painter) { painter->setPen(QPen(QColor(255,0,0),2)); if (mouseClicks == 0){painter->drawText(30,basicgraph->height()-20,QObject::tr("Select Lower Bounds"));} if (mouseClicks == 1 || mouseClicks == 2){drawLeftArrow(painter); painter->drawText(30,basicgraph->height()-20,QObject::tr("Select Upper Bounds"));} if (mouseClicks == 4) { calculate_and_draw(painter); drawLeftArrow(painter); drawRightArrow(painter); painter->drawText(LEFTOFFSET,basicgraph->height()-24,resultString); painter->drawText(LEFTOFFSET,basicgraph->height()-10,QObject::tr("Click to continue...")); } if (mouseClicks == 5) { draw_stored(painter); drawLeftArrow(painter); drawRightArrow(painter); painter->drawText(LEFTOFFSET,basicgraph->height()-24,resultString); painter->drawText(LEFTOFFSET,basicgraph->height()-10,QObject::tr("Click to continue...")); } } void MathFunction::exec(FungParser *fp, FungParser *fp2) { bool tmpTrace = false; if (fp) { expression = fp; tmpTrace = basicgraph->isTracing(); basicgraph->setTrace(true); } if (fp2) { qDebug("is fp2"); expression2 = fp2; } _active = true; mouseClicks = GETLOWERBOUND; basicgraph->repaint(false); getTwoPoints(); if (fp) basicgraph->setTrace(tmpTrace); _active = false; expression = 0; expression2= 0; } void MathFunction::cancel() { mouseClicks = CANCEL; } void MathFunction::drawSelectedPoint(double x, double y, QPainter *painter) { painter->save(); painter->setPen(QPen(QColor(100,200,0),1,Qt::DotLine)); painter->drawLine(toPixelXCoord(x),0,toPixelXCoord(x),basicgraph->height()); painter->drawLine(0,toPixelYCoord(y),basicgraph->width(),toPixelYCoord(y)); painter->fillRect(toPixelXCoord(x)-3,toPixelYCoord(y)-3,6,6,QBrush(QColor(0,100,255),Qt::SolidPattern)); painter->restore(); } void MathFunction::drawLeftArrow(QPainter *painter) { int x = lowerBounds.x(); int y = lowerBounds.y(); QPointArray points(3); points.setPoint(0,x,y); points.setPoint(1,x-BOUNDS_TRIANGLE*2,y-BOUNDS_TRIANGLE); points.setPoint(2,x-BOUNDS_TRIANGLE*2,y+BOUNDS_TRIANGLE); painter->save(); painter->setPen(QPen(QColor(0,100,255),2)); painter->setBrush(QBrush(QColor(0,100,255),Qt::SolidPattern)); painter->drawPolygon(points); painter->restore(); } void MathFunction::drawRightArrow(QPainter *painter) { int x = upperBounds.x(); int y = upperBounds.y(); QPointArray points(3); points.setPoint(0,x,y); points.setPoint(1,x+BOUNDS_TRIANGLE*2,y-BOUNDS_TRIANGLE); points.setPoint(2,x+BOUNDS_TRIANGLE*2,y+BOUNDS_TRIANGLE); painter->save(); painter->setPen(QPen(QColor(0,100,255),2)); painter->setBrush(QBrush(QColor(0,100,255),Qt::SolidPattern)); painter->drawPolygon(points); painter->restore(); }