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#include <QtGui>

#include "wigglywidget.h"

//! [0]

WigglyWidget::WigglyWidget(QWidget *parent)

    : QWidget(parent)

{

    setBackgroundRole(QPalette::Midlight);

    setAutoFillBackground(true);

    QFont newFont = font();

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

    setFont(newFont);

    step = 0;

    timer.start(60, this);

}

//! [0]

//! [1]

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

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

{

    static const int sineTable[16] = {

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

    };

    QFontMetrics metrics(font());

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

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

    QColor color;

//! [2]

//! [3]

    QPainter painter(this);

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

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

        int index = (step + i) % 16;

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

        painter.setPen(color);

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

                         QString(text[i]));

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

    }

}

//! [4]

//! [5]

void WigglyWidget::timerEvent(QTimerEvent *event)

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

{

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

        ++step;

        update();

    } else {

	QWidget::timerEvent(event);

    }

//! [6]

}