wigglywidget.cpp Example File | Qt 4.8 (original) (raw)

widgets/wiggly/wigglywidget.cpp

#include

#include "wigglywidget.h"

WigglyWidget::WigglyWidget(QWidget *parent) : QWidget(parent) { setBackgroundRole(QPalette::Midlight); setAutoFillBackground(true);

[QFont](qfont.html) newFont = font();
newFont.setPointSize(newFont.pointSize() + 20);
setFont(newFont);

step = 0;
timer.start(60, this);

}

void WigglyWidget::paintEvent(QPaintEvent * ) { static const int sineTable[16] = { 0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38 };

[QFontMetrics](qfontmetrics.html) metrics(font());
int x = (width() - metrics.width(text)) / 2;
int y = (height() + metrics.ascent() - metrics.descent()) / 2;
[QColor](qcolor.html) color;

[QPainter](qpainter.html) painter(this);
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](qstring.html)(text[i]));
    x += metrics.width(text[i]);
}

}

void WigglyWidget::timerEvent(QTimerEvent *event) { if (event->timerId() == timer.timerId()) { ++step; update(); } else { QWidget::timerEvent(event); } }

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