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131 lines
3.9 KiB
131 lines
3.9 KiB
/***************************************************************************
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taskwidget.cpp - paint a task
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-------------------
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begin : 2004/05/30
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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 "taskwidget.h"
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#include "taskwidget.moc"
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/* these includes are needed for KDE support */
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#include <tdelocale.h>
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/* these includes are needed for TQt support */
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#include <tqpainter.h>
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TaskWidget::TaskWidget(TQWidget * parent = 0, const char * name = 0,
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const task para_task = *new task()) :
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FractionBaseWidget(parent, name), m_task(para_task)
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{
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#ifdef DEBUG
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kdDebug() << "constructor TaskWidget" << endl;
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#endif
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}
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TaskWidget::~TaskWidget()
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{
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#ifdef DEBUG
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kdDebug() << "destructor TaskWidget" << endl;
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#endif
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}
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void TaskWidget::setTask(const task para_task)
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{
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m_task = para_task;
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update();
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}
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void TaskWidget::paintEvent(TQPaintEvent* /* 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 old_x = _MARGIN_X;
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// strings holding numerator, denominator and the operation sign
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TQString str_numerator, str_denominator, str_operation;
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// operation sign as number
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short tmp_operation;
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// start the painter
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TQPainter 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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TQPen pen(TQt::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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TQFontMetrics fm(paint.fontMetrics());
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// now we can correctly set the height of the widget
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setMinimumHeight(2 * fm.lineSpacing() + 10);
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setMaximumHeight(2 * fm.lineSpacing() + 10);
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// loop through all ratios and paint them
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for (unsigned short tmp_counter = 0; tmp_counter < m_task.getNumberOfRatios(); tmp_counter++)
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{
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// get the current ratio and paint it
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paintRatio(paint, m_task.get_ratio_n(tmp_counter), old_x, fm, false);
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// now check if we have another operation to show
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// if not we will stop showing ratios as well
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if (tmp_counter < m_task.getNumberOfOperations())
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{
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// get the operation sign
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tmp_operation = m_task.get_op_n(tmp_counter);
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// we have to convert the operation sign into a string
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switch (tmp_operation)
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{
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case ADD :
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str_operation = "+";
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break;
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case SUB :
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str_operation = "-";
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break;
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case MUL :
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str_operation = "x";
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break;
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case DIV :
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// there seems to be different division signs around the world
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// so please translate it to the right one for your country
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str_operation = i18n("division symbol", "/");
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break;
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} /* switch (operation) */
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// paint the operation
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paintMiddle(paint, str_operation, old_x, fm, m_colorOperation);
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} else {
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// no further operations to show, so we always show the = sign at the
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// end of a task
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paintMiddle(paint, "=", old_x, fm, m_colorOperation);
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break;
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} // if (tmp_counter < m_task.getNumberOfOperations())
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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(old_x);
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return;
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}
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