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Diffstat (limited to 'kbruch/src/fractionbasewidget.cpp')
| -rw-r--r-- | kbruch/src/fractionbasewidget.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/kbruch/src/fractionbasewidget.cpp b/kbruch/src/fractionbasewidget.cpp new file mode 100644 index 00000000..77ff3056 --- /dev/null +++ b/kbruch/src/fractionbasewidget.cpp @@ -0,0 +1,168 @@ +/*************************************************************************** + fractionbasewidget.cpp - base fraction painting + ------------------- + 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 "fractionbasewidget.h" +#include "fractionbasewidget.moc" + +/* these includes are needed for KDE support */ +#include <kglobalsettings.h> + +/* these includes are needed for Qt support */ +#include <qpainter.h> + +#include "settingsclass.h" + +FractionBaseWidget::FractionBaseWidget(QWidget * parent = 0, const char * name = 0) : + QWidget(parent, name) +{ +#ifdef DEBUG + kdDebug() << "constructor FractionBaseWidget" << endl; +#endif + + // set colors and font used for task displaying + setColorAndFont(); +} + +FractionBaseWidget::~FractionBaseWidget() +{ +#ifdef DEBUG + kdDebug() << "destructor FractionBaseWidget" << endl; +#endif +} + +void FractionBaseWidget::updateAndRepaint() +{ + setColorAndFont(); + update(); +} + +void FractionBaseWidget::paintRatio(QPainter & paint, ratio tmp_ratio, int & x_pos, QFontMetrics & fm, bool show_mixed, bool addMargin) +{ + QPen pen = paint.pen(); // get the pen + int fontHeight = fm.lineSpacing(); // get the font height + + int int_numerator, int_denominator, int_mixed; + QString str_numerator, str_denominator; + QString str_mixed; + + int fontWidth; // to store the width of the last thing painted + int tmp_int; + + // check if we have to show the ratio as mixed number + // 11 1 + // if yes, -- becomes 2 - + // 5 5 + int_numerator = tmp_ratio.numerator(); + int_denominator = tmp_ratio.denominator(); + if (show_mixed == true && QABS(int_numerator) >= QABS(int_denominator)) + { + // calculate the mixed number + int_mixed = int(int_numerator / int_denominator); + + // the negative sign is in front of the mixed number + int_numerator = QABS(int_numerator); + int_denominator = QABS(int_denominator); + + // we have to reduce the numerator by the mixed number * denominator + int_numerator = int_numerator % int_denominator; + + // now we can convert the numbers into strings for painting + str_mixed.setNum(int_mixed); + str_numerator.setNum(int_numerator); + str_denominator.setNum(int_denominator); + + // paint the front part of the mixed number + paintMiddle(paint, str_mixed, x_pos, fm, m_colorNumber); + } else { + + // don't show the ratio as mixed number + str_numerator.setNum(int_numerator); + str_denominator.setNum(int_denominator); + } // if (show_mixed == true && QABS(int_numerator) > QABS(int_denominator)) + + // get the text width of the current ratio + fontWidth = fm.width(str_numerator); + tmp_int = fm.width(str_denominator); + if (tmp_int > fontWidth) + fontWidth = tmp_int; + + // show numerator and denominator in m_colorNumber + pen.setColor(m_colorNumber); + paint.setPen(pen); + + // make sure we don't display something like: 0 + // 7 - + // 3 + if (! (int_numerator == 0 && show_mixed == true) ) + { + // paint the numerator + paint.drawText(x_pos, 0, fontWidth, fontHeight, AlignCenter, str_numerator); + + // paint the fraction line between numerator and denominator + paint.fillRect(x_pos, fontHeight + 4, fontWidth, 2, m_colorLine); + + // paint the denominator + paint.drawText(x_pos, fontHeight + 10, fontWidth, fontHeight, AlignCenter, str_denominator); + + // move the x position to the right by adding the width used for painting + // the ratio and a margin + x_pos += fontWidth; + + if (addMargin == true) + x_pos += _MARGIN_X; + } + + return; +} + +void FractionBaseWidget::paintMiddle(QPainter & paint, const QString& paint_str, int & x_pos, QFontMetrics & fm, QColor color, bool addMargin) +{ + // get the pen, font height and font width + QPen pen = paint.pen(); + int fontHeight = fm.lineSpacing(); + int fontWidth = fm.width(paint_str); + + // paint the string + pen.setColor(color); + paint.setPen(pen); + paint.drawText(x_pos, fontHeight + 5 - fontHeight / 2, fontWidth, fontHeight, AlignCenter, paint_str); + + // move the x position to the right by adding the width used for + // painting the string and a margin + x_pos += fontWidth; + + if (addMargin == true) + x_pos += _MARGIN_X; + + return; +} + +void FractionBaseWidget::setColorAndFont() +{ + /* set colors */ + m_colorNumber = SettingsClass::numberColor(); + m_colorLine = SettingsClass::fractionBarColor(); + m_colorOperation = SettingsClass::operationColor(); + + /* set font */ + m_font = SettingsClass::taskFont(); + + // repaint + update(); + + return; +} |