1 files changed, 114 insertions, 0 deletions
diff --git a/kbruch/src/rationalwidget.cpp b/kbruch/src/rationalwidget.cpp
new file mode 100644
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--- /dev/null
+++ b/kbruch/src/rationalwidget.cpp
@@ -0,0 +1,114 @@
+/***************************************************************************
+                          rationalwidget.h  -  paint a rational number
+                             -------------------
+    begin                : 2004/06/04
+    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 "rationalwidget.h"
+#include "rationalwidget.moc"
+
+/* these includes are needed for Qt support */
+#include <qpainter.h>
+#include <qstring.h>
+
+RationalWidget::RationalWidget(QWidget * parent, const char * name, const QString pnumber, const uint pperiodStart, const uint pperiodLength):
+			FractionBaseWidget(parent, name), m_number(pnumber),
+				m_periodStart(pperiodStart), m_periodLength(pperiodLength)
+{
+#ifdef DEBUG
+	kdDebug() << "constructor RationalWidget" << endl;
+#endif
+}
+
+RationalWidget::~RationalWidget()
+{
+#ifdef DEBUG
+	kdDebug() << "destructor RationalWidget" << endl;
+#endif
+}
+
+void RationalWidget::setRational(const QString pnumber, const uint pperiodStart, const uint 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 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 (uint 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, 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 - 3, x_pos - x_startPos, 1, m_colorNumber);
+		}
+	}
+
+	// paint a = at the end
+	x_pos += _MARGIN_X;
+	paintMiddle(paint, "=", x_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;
+}