File indexing completed on 2024-04-21 03:41:49

 /*
     RationalWidget.cpp  -  paint a rational number
     SPDX-FileCopyrightText: 2004 Sebastian Stein <seb.kde@hpfsc.de>
     SPDX-FileCopyrightText: 2008 Tadeu Araujo <tadeu.araujo@ltia.fc.unesp.br>
     SPDX-FileCopyrightText: 2008 Danilo Balzaque <danilo.balzaque@ltia.fc.unesp.br>
     SPDX-FileCopyrightText: 2008 Tiago Porangaba <tiago.porangaba@ltia.fc.unesp.br>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "RationalWidget.h"
 
 /* these includes are needed for Qt support */
 #include <QPainter>
 #include <QPaintEvent>
 
 #ifdef DEBUG
 #include <QDebug>
 #endif
 
 RationalWidget::RationalWidget(QWidget * parent, const QString &pnumber, const int pperiodStart, const int pperiodLength) :
     FractionBaseWidget(parent), m_number(pnumber),
     m_periodStart(pperiodStart), m_periodLength(pperiodLength)
 {
 #ifdef DEBUG
     qDebug() << QStringLiteral("constructor RationalWidget");
 #endif
 }
 
 RationalWidget::~RationalWidget()
 {
 #ifdef DEBUG
     qDebug() << QStringLiteral("destructor RationalWidget");
 #endif
 }
 
 void RationalWidget::setRational(const QString &pnumber, const int pperiodStart, const int pperiodLength)
 {
     m_number = pnumber;
     m_periodStart = pperiodStart;
     m_periodLength = pperiodLength;
 
     update();
 
     return;
 }
 
 void RationalWidget::paintEvent(QPaintEvent* /* p_paintEvent */)
 {
     // our x position, we paint from left to right;
     // we don't want to start directly on the border, so add the margin
     int x_pos = _MARGIN_X;
     int y_pos = 0;
     int x_startPos = _MARGIN_X;
     bool tmp_painting = false;
 
     // start the painter
     QPainter paint(this);
 
     // ratios and operation signs are painted with the same font
     paint.setFont(m_font);
 
     // set the pen for painting
     QPen pen(Qt::SolidLine);
     pen.setWidth(0);
     paint.setPen(pen);
 
     // get the font height; the font height doesn't change while painting
     QFontMetrics fm(paint.fontMetrics());
     int fontHeight = fm.lineSpacing(); // get the font height
 
     // now we can correctly set the height of the widget
     setMinimumHeight(2 * fontHeight + 10);
     setMaximumHeight(2 * fontHeight + 10);
 
     // paint each char one by one
     for (int stringPos = 0; stringPos < m_number.length(); stringPos++) {
         // check if the period line starts over the current number
         if (m_periodLength > 0 && stringPos == m_periodStart && tmp_painting == false) {
             x_startPos = x_pos;
             tmp_painting = true;
         }
 
         // paint the current number (or comma)
         paintMiddle(paint, QString(m_number[stringPos]), x_pos, y_pos, fm, m_colorNumber, false);
 
         // check if the period line ends over the current number; in this case
         // draw the period line
         if (tmp_painting == true && m_periodStart + m_periodLength - 1 == stringPos) {
             tmp_painting = false;
 
             // paint the period line above the numbers
             paint.fillRect(x_startPos, fontHeight / 2, x_pos - x_startPos, fm.lineWidth(), m_colorNumber);
         }
     }
 
     // paint a = at the end
     x_pos += _MARGIN_X;
     paintMiddle(paint, QStringLiteral(" = "), x_pos, y_pos, fm, m_colorOperation);
 
     // stop the painter
     paint.end();
 
     // the space we needed for painting is the minimum width of the widget
     setMinimumWidth(x_pos);
 
     return;
 }
 
 #include "moc_RationalWidget.cpp"