s3c2410 framebuffer显示字LCD

#include <QtGui> #include "ticker.h" Ticker::Ticker(QWidget *parent) : QWidget(parent) { offset = 0; myTimerId = 0; } void Ticker::setText(const QString &newText) { myText = newText; update(); updateGeometry(); } QSize Ticker::sizeHint() const { return fontMetrics().size(0, text()); } void Ticker::paintEvent(QPaintEvent * /* event */) { QPainter painter(this); int textWidth = fontMetrics().width(text()); if (textWidth < 1) return; int x = -offset; while (x < width()) { painter.drawText(x, 0, textWidth, height(), Qt::AlignLeft | Qt::AlignVCenter, text()); x += textWidth; } } void Ticker::showEvent(QShowEvent * /* event */) { myTimerId = startTimer(30); } void Ticker::timerEvent(QTimerEvent *event) { if (event->timerId() == myTimerId) { ++offset; if (offset >= fontMetrics().width(text())) offset = 0; scroll(-1, 0); } else { QWidget::timerEvent(event); } } void Ticker::hideEvent(QHideEvent * /* event */) { killTimer(myTimerId); myTimerId = 0; }