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void FractionBaseWidget::paintRatio ( QPainter &  paint,
ratio  tmp_ratio,
int &  x_pos,
int &  y_pos,
QFontMetrics &  fm,
bool  addMargin = true,
bool  show_mixed = true,
bool  show_center = false 
) [protected, inherited]

overwriting the paint event of QWidget paints a ratio at the given position

Definition at line 57 of file fractionbasewidget.cpp.

References ratio::denominator(), ratio::numerator(), and FractionBaseWidget::paintMiddle().

Referenced by paintEvent(), ResultWidget::paintEvent(), and RatioWidget::paintEvent().

{
    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, y_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 (! (show_mixed == true && int_numerator == 0)) {
        if (show_center == true)
            x_pos = 80 - fontWidth / 2;
        if (! (int_denominator == 1 && show_mixed == false)) {
            // paint the numerator
            paint.drawText (x_pos, y_pos, fontWidth, fontHeight, Qt::AlignCenter, str_numerator);
            // paint the fraction line between numerator and denominator
            paint.fillRect (x_pos, y_pos + fontHeight + 4, fontWidth, 2, m_colorLine);
            // paint the denominator
            paint.drawText (x_pos, y_pos + fontHeight + 10, fontWidth, fontHeight, Qt::AlignCenter, str_denominator);
        } else {
            // paint the numerator and move the y position down to align with the + signal
            paint.drawText (x_pos, y_pos + fontHeight - fontHeight / 2, fontWidth,
                            fontHeight, Qt::AlignCenter, str_numerator);
        }

        // 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;
}

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