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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "wigglywidget.h"

    45 

    46 //! [0]

    47 WigglyWidget::WigglyWidget(QWidget *parent)

    48     : QWidget(parent)

    49 {

    50     setBackgroundRole(QPalette::Midlight);

    51     setAutoFillBackground(true);

    52 

    53     QFont newFont = font();

    54     newFont.setPointSize(newFont.pointSize() + 20);

    55     setFont(newFont);

    56 

    57     step = 0;

    58     timer.start(60, this);

    59 }

    60 //! [0]

    61 

    62 //! [1]

    63 void WigglyWidget::paintEvent(QPaintEvent * /* event */)

    64 //! [1] //! [2]

    65 {

    66     static const int sineTable[16] = {

    67         0, 38, 71, 92, 100, 92, 71, 38,	0, -38, -71, -92, -100, -92, -71, -38

    68     };

    69 

    70     QFontMetrics metrics(font());

    71     int x = (width() - metrics.width(text)) / 2;

    72     int y = (height() + metrics.ascent() - metrics.descent()) / 2;

    73     QColor color;

    74 //! [2]

    75 

    76 //! [3]

    77     QPainter painter(this);

    78 //! [3] //! [4]

    79     for (int i = 0; i < text.size(); ++i) {

    80         int index = (step + i) % 16;

    81         color.setHsv((15 - index) * 16, 255, 191);

    82         painter.setPen(color);

    83         painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400),

    84                          QString(text[i]));

    85         x += metrics.width(text[i]);

    86     }

    87 }

    88 //! [4]

    89 

    90 //! [5]

    91 void WigglyWidget::timerEvent(QTimerEvent *event)

    92 //! [5] //! [6]

    93 {

    94     if (event->timerId() == timer.timerId()) {

    95         ++step;

    96         update();

    97     } else {

    98 	QWidget::timerEvent(event);

    99     }

   100 //! [6]

   101 }