#include <QtGui>
#include "hled.h"
struct HLed::Private
{
public:
Private()
: darkerFactor(300), color(Qt::green), isOn(true)
{ }
int darkerFactor;
QColor color;
bool isOn;
};
HLed::HLed(QWidget *parent)
:QWidget(parent), m_d(new Private)
{
}
HLed::~HLed()
{
delete m_d;
}
QColor HLed::color() const
{
return m_d->color;
}
void HLed::setColor(const QColor &color)
{
if (m_d->color == color)
return;
update();
}
QSize HLed::sizeHint() const
{
return QSize(20, 20);
}
QSize HLed::minimumSizeHint() const
{
return QSize(16, 16);
}
void HLed::toggle()
{
m_d->isOn = !m_d->isOn;
update();
}
void HLed::turnOn(bool on)
{
m_d->isOn = on;
update();
}
void HLed::turnOff(bool off)
{
turnOn(!off);
}
void HLed::paintEvent(QPaintEvent* /* event*/)
{
int width = ledWidth();
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
QColor color = m_d->isOn ? m_d->color
: m_d->color.darker(m_d->darkerFactor);
QBrush brush;
brush.setStyle(Qt::SolidPattern);
brush.setColor(color);
painter.setBrush(brush);
// draw plain
painter.drawEllipse(1, 1, width-1, width-1);
QPen pen;
pen.setWidth(2);
int pos = width / 5 + 1;
int lightWidth = width * 2 / 3;
int lightQuote = 130 * 2 / (lightWidth ? lightWidth : 1) + 100;
// draw bright spot
while (lightWidth) {
color = color.lighter(lightQuote);
pen.setColor(color);
painter.setPen(pen);
painter.drawEllipse(pos, pos, lightWidth, lightWidth);
lightWidth--;
if (!lightWidth)
break;
painter.drawEllipse(pos, pos, lightWidth, lightWidth);
lightWidth--;
if (!lightWidth)
break;
painter.drawEllipse(pos, pos, lightWidth, lightWidth);
pos++;
lightWidth--;
}
//draw border
painter.setBrush(Qt::NoBrush);
int angle = -720;
color = palette().color(QPalette::Light);
for (int arc=120; arc<2880; arc+=240) {
pen.setColor(color);
painter.setPen(pen);
int w = width - pen.width()/2;
painter.drawArc(pen.width()/2, pen.width()/2, w, w, angle+arc, 240);
painter.drawArc(pen.width()/2, pen.width()/2, w, w, angle-arc, 240);
color = color.darker(110);
}
}
int HLed::ledWidth() const
{
int width = qMin(this->width(), this->height());
width -= 2;
return width > 0 ? width : 0;
}
