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#include "gauge.h"
Gauge::Gauge(QWidget *parent) : QWidget (parent) ,
m_gauge_percentage(0),
m_needle_horizontal_offset(0),
m_needle_origin(0,0),
m_start_angle(180),
m_end_angle(0)
{
setMinimumHeight(32);
setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
}
void Gauge::setOrigin(int x,int y) //Set a real origin based on image if available, otherwise store desired value for later use.
{
if(!m_needle.isNull())
{
m_draw_point = QPoint(x-m_needle_horizontal_offset-(m_needle.width()/2),y-m_needle.height());
m_needle_origin = QPoint(x,y);
update();
}
else
{
m_needle_origin = QPoint(x,y);
}
}
void Gauge::setOrigin(QPoint o) //Set a real origin based on image if available, otherwise store desired value for later use.
{
if(!m_needle.isNull())
{
m_draw_point = QPoint(o.x()-m_needle_horizontal_offset-(m_needle.width()/2),o.y()-m_needle.height());
m_needle_origin = o;
update();
}
else
{
m_needle_origin = o;
}
}
//void Gauge::obtainLength()
//{
// if(m_needle.isNull())return;
// if(m_needle.height() > m_needle.width())
// m_needle_length = m_needle.height();
// else
// m_needle_length = m_needle.width();
// update();
//}
void Gauge::setNeedleImage(QString path)
{
m_needle.load(path);
//obtainLength();
update();
}
void Gauge::setEndAngle(qreal a)
{
if(a > 0) m_end_angle = a - 360.0;
else m_end_angle = a;
update();
}
void Gauge::setStartAngle(qreal a)
{
if(a < 0) m_start_angle = a + 360.0;
else m_start_angle = a;
update();
}
void Gauge::paintEvent(QPaintEvent *)
{
if(m_needle.isNull())return;
QPainter p(this);
QTransform tran;
double angle = (DEFUALT_IMAGE_ANGLE - m_start_angle)-((m_end_angle-m_start_angle)/(100.0)*m_gauge_percentage);
tran.translate(m_needle_origin.x(),m_needle_origin.y());
tran.rotate(angle);
tran.translate(-m_needle_origin.x(),-m_needle_origin.y());
p.setTransform(tran);
p.drawPixmap(m_draw_point,m_needle);
}
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