shapedclock.cpp Example File
widgets/shapedclock/shapedclock.cpp
/****************************************************************************
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** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
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** This file is part of the documentation of the Qt Toolkit.
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#include <QtGui>
#include "shapedclock.h"
ShapedClock::ShapedClock(QWidget *parent)
: QWidget(parent)
{
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
timer->start(1000);
setMouseTracking(true);
setWindowFlags(windowFlags() | Qt::FramelessWindowHint);
setWindowTitle(tr("Shaped Analog Clock"));
}
void ShapedClock::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
dragPosition = event->globalPos() - frameGeometry().topLeft();
event->accept();
}
}
void ShapedClock::mouseMoveEvent(QMouseEvent *event)
{
if (event->buttons() == Qt::LeftButton) {
move(event->globalPos() - dragPosition);
event->accept();
}
}
void ShapedClock::paintEvent(QPaintEvent *)
{
static const QPoint hourHand[3] = {
QPoint(7, 8),
QPoint(-7, 8),
QPoint(0, -40)
};
static const QPoint minuteHand[3] = {
QPoint(7, 8),
QPoint(-7, 8),
QPoint(0, -70)
};
QColor hourColor(127, 0, 127);
QColor minuteColor(0, 127, 127, 191);
int side = qMin(width(), height());
QTime time = QTime::currentTime();
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);
painter.scale(side / 200.0, side / 200.0);
painter.setPen(Qt::NoPen);
painter.setBrush(hourColor);
painter.save();
painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)));
painter.drawConvexPolygon(hourHand, 3);
painter.restore();
painter.setPen(hourColor);
for (int i = 0; i < 12; ++i) {
painter.drawLine(88, 0, 96, 0);
painter.rotate(30.0);
}
painter.setPen(Qt::NoPen);
painter.setBrush(minuteColor);
painter.save();
painter.rotate(6.0 * (time.minute() + time.second() / 60.0));
painter.drawConvexPolygon(minuteHand, 3);
painter.restore();
painter.setPen(minuteColor);
for (int j = 0; j < 60; ++j) {
if ((j % 5) != 0)
painter.drawLine(92, 0, 96, 0);
painter.rotate(6.0);
}
}
void ShapedClock::resizeEvent(QResizeEvent *event)
{
int side = qMin(width(), height());
QRegion maskedRegion(width()/2 - side/2, height()/2 - side/2, side, side,
QRegion::Ellipse);
setMask(maskedRegion);
}
QSize ShapedClock::sizeHint() const
{
return QSize(100, 100);
}