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113 lines
3.3 KiB
113 lines
3.3 KiB
15 years ago
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/***************************************************************************
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factorizedwidget.h - paint a factorization
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-------------------
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begin : 2004/07/11
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copyright : (C) 2004 by Sebastian Stein
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email : seb.kde@hpfsc.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "factorizedwidget.h"
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#include "factorizedwidget.moc"
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/* these includes are needed for Qt support */
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#include <qpainter.h>
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FactorizedWidget::FactorizedWidget(QWidget * parent, const char * name, const uintList para_factors) :
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FractionBaseWidget(parent, name), m_factors(para_factors)
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{
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#ifdef DEBUG
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kdDebug() << "constructor FactorizedWidget" << endl;
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#endif
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}
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FactorizedWidget::~FactorizedWidget()
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{
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#ifdef DEBUG
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kdDebug() << "destructor FactorizedWidget" << endl;
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#endif
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}
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void FactorizedWidget::setFactors(const uintList para_factors)
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{
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m_factors = para_factors;
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update();
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}
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void FactorizedWidget::paintEvent(QPaintEvent* /* p_paintEvent */)
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{
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// our x position, we paint from left to right;
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// we don't want to start directly on the border, so add the margin
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int x_pos = _MARGIN_X;
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int fontWidth; // to store the width of the last thing painted
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// start the painter
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QPainter paint(this);
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// ratios and operation signs are painted with the same font
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paint.setFont(m_font);
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// set the pen for painting
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QPen pen(Qt::SolidLine);
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pen.setWidth(0);
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paint.setPen(pen);
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// get the font height; the font height doesn't change while painting
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QFontMetrics fm(paint.fontMetrics());
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// now we can correctly set the height of the widget
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setMinimumHeight(fm.lineSpacing());
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setMaximumHeight(fm.lineSpacing());
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QString tmpStr;
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int fontHeight = fm.lineSpacing(); // get the font height
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for (uint tmpInt = 0; tmpInt < m_factors.count(); tmpInt++)
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{
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// set color for operation sign
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pen.setColor(m_colorOperation);
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paint.setPen(pen);
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if (tmpInt == 0)
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{
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fontWidth = fm.width("=");
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paint.drawText(x_pos, 0, fontWidth, fontHeight, AlignCenter, "=");
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x_pos += fontWidth;
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x_pos += _MARGIN_X;
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} else {
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fontWidth = fm.width("*");
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paint.drawText(x_pos, 0, fontWidth, fontHeight, AlignCenter, "*");
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x_pos += fontWidth;
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x_pos += _MARGIN_X;
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}
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// set color for number
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pen.setColor(m_colorNumber);
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paint.setPen(pen);
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tmpStr.setNum(m_factors[tmpInt]);
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fontWidth = fm.width(tmpStr);
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paint.drawText(x_pos, 0, fontWidth, fontHeight, AlignCenter, tmpStr);
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x_pos += fontWidth;
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x_pos += _MARGIN_X;
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}
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// stop the painter
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paint.end();
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// the space we needed for painting is the minimum width of the widget
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setMinimumWidth(x_pos);
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return;
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}
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