diff options
Diffstat (limited to 'kbruch/src/taskwidget.cpp')
| -rw-r--r-- | kbruch/src/taskwidget.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/kbruch/src/taskwidget.cpp b/kbruch/src/taskwidget.cpp new file mode 100644 index 00000000..378b7afb --- /dev/null +++ b/kbruch/src/taskwidget.cpp @@ -0,0 +1,130 @@ +/*************************************************************************** + taskwidget.cpp - paint a task + ------------------- + begin : 2004/05/30 + copyright : (C) 2004 by Sebastian Stein + email : seb.kde@hpfsc.de + ***************************************************************************/ + +/*************************************************************************** + * * + * 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 "taskwidget.h" +#include "taskwidget.moc" + +/* these includes are needed for KDE support */ +#include <klocale.h> + +/* these includes are needed for Qt support */ +#include <qpainter.h> + +TaskWidget::TaskWidget(QWidget * parent = 0, const char * name = 0, + const task para_task = *new task()) : + FractionBaseWidget(parent, name), m_task(para_task) +{ +#ifdef DEBUG + kdDebug() << "constructor TaskWidget" << endl; +#endif +} + +TaskWidget::~TaskWidget() +{ +#ifdef DEBUG + kdDebug() << "destructor TaskWidget" << endl; +#endif +} + +void TaskWidget::setTask(const task para_task) +{ + m_task = para_task; + update(); +} + +void TaskWidget::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 old_x = _MARGIN_X; + + // strings holding numerator, denominator and the operation sign + QString str_numerator, str_denominator, str_operation; + + // operation sign as number + short tmp_operation; + + // 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()); + + // now we can correctly set the height of the widget + setMinimumHeight(2 * fm.lineSpacing() + 10); + setMaximumHeight(2 * fm.lineSpacing() + 10); + + // loop through all ratios and paint them + for (unsigned short tmp_counter = 0; tmp_counter < m_task.getNumberOfRatios(); tmp_counter++) + { + // get the current ratio and paint it + paintRatio(paint, m_task.get_ratio_n(tmp_counter), old_x, fm, false); + + // now check if we have another operation to show + // if not we will stop showing ratios as well + if (tmp_counter < m_task.getNumberOfOperations()) + { + // get the operation sign + tmp_operation = m_task.get_op_n(tmp_counter); + + // we have to convert the operation sign into a string + switch (tmp_operation) + { + case ADD : + str_operation = "+"; + break; + case SUB : + str_operation = "-"; + break; + case MUL : + str_operation = "x"; + break; + case DIV : + // there seems to be different division signs around the world + // so please translate it to the right one for your country + str_operation = i18n("division symbol", "/"); + break; + } /* switch (operation) */ + + // paint the operation + paintMiddle(paint, str_operation, old_x, fm, m_colorOperation); + + } else { + // no further operations to show, so we always show the = sign at the + // end of a task + paintMiddle(paint, "=", old_x, fm, m_colorOperation); + + break; + } // if (tmp_counter < m_task.getNumberOfOperations()) + } + + // stop the painter + paint.end(); + + // the space we needed for painting is the minimum width of the widget + setMinimumWidth(old_x); + + return; +} |