kbruch/src/fractionbasewidget.h

   1 /***************************************************************************
   2                           fractionbasewidget.h  -  base fraction painting
   3                              -------------------
   4     begin                : 2004/05/30
   5     copyright            : (C) 2004 by Sebastian Stein
   6     email                : seb.kde@hpfsc.de
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #ifndef FRACTIONBASEWIDGET_H
  19 #define FRACTIONBASEWIDGET_H
  20
  21 /** the space between a ratio and an operation */
  22 #define _MARGIN_X 5
  23
  24 #ifdef DEBUG
  25 #include <kdebug.h>
  26 #endif
  27
  28 #include "ratio.h"
  29
  30 #include <qwidget.h>
  31
  32
  33 /*! base class for painting fractions
  34  *
  35  *  \author Sebastian Stein */
  36 class FractionBaseWidget : public QWidget
  37 {
  38         Q_OBJECT
  39
  40 public:
  41         /** constructor */
  42         FractionBaseWidget(QWidget * parent, const char * name);
  43
  44         /** destructor */
  45         ~FractionBaseWidget();
  46
  47         /** updates the widget by first getting the settings and then repainting */
  48         void updateAndRepaint();
  49
  50 protected:
  51
  52         /* store the different colors */
  53         QColor m_colorNumber;
  54         QColor m_colorLine;
  55         QColor m_colorOperation;
  56
  57         /* the font to paint with */
  58         QFont m_font;
  59
  60         /** overrideing the paint event of QWidget */
  61         virtual void paintEvent(QPaintEvent*) = 0;
  62
  63         /** paints a ratio at the given position */
  64         void paintRatio(QPainter & paint, ratio tmp_ratio, int & x_pos, QFontMetrics & fm, bool show_mixed, bool addMargin = true);
  65
  66         /** paints a string in the vertical middle (aligned to the operation signs) */
  67         void paintMiddle(QPainter & paint, const QString& paint_str, int & x_pos, QFontMetrics & fm, QColor color, bool addMargin = true);
  68
  69 private:
  70         /** sets the font and color; values taken from settingsclass */
  71         void setColorAndFont();
  72 };
  73
  74 #endif