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#include "line.h"
Line::Line()
: QLine()
{
m_selected = true;
}
bool Line::isHit(const QPoint &clickPoint)
{
QVector3D a(p2() - p1());
QVector3D r1(p1());
QVector3D rq(clickPoint);
float dist = rq.distanceToLine(r1, a.normalized());
return dist < 5;
}
void Line::setSelected(bool selected)
{
m_selected = selected;
}
void Line::draw(QPainter *painter)
{
if (m_selected)
{
QPen penTemp(Qt::DotLine);
penTemp.setColor(Qt::red);
painter->setPen(penTemp);
painter->drawEllipse(p1(), 5, 5);
painter->drawEllipse(p2(), 5, 5);
}
else
{
QPen penNormal(Qt::SolidLine);
penNormal.setColor(Qt::black);
painter->setPen(penNormal);
}
painter->drawLine(p1(), p2());
}
void Line::move(const QPoint &oldPoint, const QPoint &newPoint)
{
if (m_selected)
{
QPoint offset = newPoint - oldPoint;
QVector3D vecOld(oldPoint);
if (vecOld.distanceToPoint(QVector3D(p1())) < 5)
{
setP1(p1() + offset);
}
else if (vecOld.distanceToPoint(QVector3D(p2())) < 5)
{
setP2(p2() + offset);
}
else
{
setP1(p1() + offset);
setP2(p2() + offset);
}
}
}
QDomElement Line::toDomElement(QDomDocument *doc)
{
QDomElement e = doc->createElement(className());
attributesToDom(doc, e);
return e;
}
bool Line::attributesToDom(QDomDocument *doc, QDomElement &e)
{
if (e.isNull())
{
qDebug() << className() << "::attributesToDom Error: NULL element passed.";
return false;
}
else
{
e.setAttribute("x1", p1().rx());
e.setAttribute("y1", p1().ry());
e.setAttribute("x2", p2().rx());
e.setAttribute("y2", p2().ry());
return true;
}
}
bool Line::fromDomElement(const QDomElement &e)
{
if (e.isNull())
{
qDebug() << className() << "::fromQDomElement Error: NULL element passed.";
return false;
}
if (className() != e.tagName())
{
qDebug() << className() << "::fromQDomElement Error: Invalid element type: " <<
e.tagName() << " instead of " << className();
return false;
}
return attributesFromDom(e);
}
bool Line::attributesFromDom(const QDomElement &e)
{
if (e.isNull())
{
qDebug() << className() << "::attributesFromDom Error: NULL element passed.";
return false;
}
else
{
QPoint newP1(e.attribute("x1", "0").toInt(), e.attribute("y1", "0").toInt());
QPoint newP2(e.attribute("x2", "0").toInt(), e.attribute("y2", "0").toInt());
setPoints(newP1, newP2);
return true;
}
}
QString Line::className()
{
return "Line";
}
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