/**
* This method aligns *this* Symbol to the line being
* passed. That is, it ensures that the axis of this symbol aligns
* exactly with the \a "to" line passed.
*
* Also this item is moved such that the second end point of the
* SymbolEndPoints for the current symbol *collides* with the second end
* point of \a "to" line.
*/
void Symbol::alignTo(const QLineF& to)
{
QLineF toMapped(mapFromParent(to.p1()), mapFromParent(to.p2()));
QLineF origAxis = Symbol::symbolTable[m_symbolType].axisLine;
QLineF translatedAxis = origAxis.translated(toMapped.p2() - origAxis.p2());
qreal angle = translatedAxis.angleTo(toMapped);
rotate(-angle);
QPointF delta = to.p2() - mapToParent(symbolEndPoints().second);
moveBy(delta.x(), delta.y());
}
void AssociationItem::placeEndLabels(const QLineF &lineSegment, QGraphicsItem *endName, QGraphicsItem *endCardinality,
QGraphicsItem *endItem, double headLength)
{
const double HEAD_OFFSET = headLength + 6.0;
const double SIDE_OFFSET = 4.0;
QPointF headOffset = QPointF(HEAD_OFFSET, 0);
QPointF sideOffset = QPointF(0.0, SIDE_OFFSET);
double angle = GeometryUtilities::calcAngle(lineSegment);
if (angle >= -5 && angle <= 5) {
if (endName)
endName->setPos(lineSegment.p1() + headOffset + sideOffset);
if (endCardinality)
endCardinality->setPos(lineSegment.p1() + headOffset - sideOffset
- endCardinality->boundingRect().bottomLeft());
} else if (angle <= -175 || angle >= 175) {
if (endName)
endName->setPos(lineSegment.p1() - headOffset + sideOffset - endName->boundingRect().topRight());
if (endCardinality)
endCardinality->setPos(lineSegment.p1() - headOffset
- sideOffset - endCardinality->boundingRect().bottomRight());
} else {
QRectF rect;
if (endCardinality)
rect = endCardinality->boundingRect();
if (endName)
rect = rect.united(endName->boundingRect().translated(rect.bottomLeft()));
QPointF rectPlacement;
GeometryUtilities::Side alignedSide = GeometryUtilities::SideUnspecified;
if (auto objectItem = dynamic_cast<IIntersectionable *>(endItem)) {
QPointF intersectionPoint;
QLineF intersectionLine;
if (objectItem->intersectShapeWithLine(GeometryUtilities::stretch(lineSegment.translated(pos()), 2.0, 0.0),
&intersectionPoint, &intersectionLine)) {
if (!GeometryUtilities::placeRectAtLine(rect, lineSegment, HEAD_OFFSET, SIDE_OFFSET,
intersectionLine, &rectPlacement, &alignedSide)) {
rectPlacement = intersectionPoint;
}
} else {
rectPlacement = lineSegment.p1();
}
} else {
rectPlacement = endItem->pos();
}
if (endCardinality) {
if (alignedSide == GeometryUtilities::SideRight)
endCardinality->setPos(rectPlacement
+ QPointF(rect.width() - endCardinality->boundingRect().width(), 0.0));
else
endCardinality->setPos(rectPlacement);
rectPlacement += endCardinality->boundingRect().bottomLeft();
}
if (endName) {
if (alignedSide == GeometryUtilities::SideRight)
endName->setPos(rectPlacement + QPointF(rect.width() - endName->boundingRect().width(), 0.0));
else
endName->setPos(rectPlacement);
}
}
}
void tst_QLine::testIntersection_data()
{
QTest::addColumn<double>("xa1");
QTest::addColumn<double>("ya1");
QTest::addColumn<double>("xa2");
QTest::addColumn<double>("ya2");
QTest::addColumn<double>("xb1");
QTest::addColumn<double>("yb1");
QTest::addColumn<double>("xb2");
QTest::addColumn<double>("yb2");
QTest::addColumn<int>("type");
QTest::addColumn<double>("ix");
QTest::addColumn<double>("iy");
QTest::newRow("parallel") << 1.0 << 1.0 << 3.0 << 4.0
<< 5.0 << 6.0 << 7.0 << 9.0
<< int(QLineF::NoIntersection) << 0.0 << 0.0;
QTest::newRow("unbounded") << 1.0 << 1.0 << 5.0 << 5.0
<< 0.0 << 4.0 << 3.0 << 4.0
<< int(QLineF::UnboundedIntersection) << 4.0 << 4.0;
QTest::newRow("bounded") << 1.0 << 1.0 << 5.0 << 5.0
<< 0.0 << 4.0 << 5.0 << 4.0
<< int(QLineF::BoundedIntersection) << 4.0 << 4.0;
QTest::newRow("almost vertical") << 0.0 << 10.0 << 20.0000000000001 << 10.0
<< 10.0 << 0.0 << 10.0 << 20.0
<< int(QLineF::BoundedIntersection) << 10.0 << 10.0;
QTest::newRow("almost horizontal") << 0.0 << 10.0 << 20.0 << 10.0
<< 10.0000000000001 << 0.0 << 10.0 << 20.0
<< int(QLineF::BoundedIntersection) << 10.0 << 10.0;
QTest::newRow("long vertical") << 100.1599256468623
<< 100.7861905065196
<< 100.1599256468604
<< -9999.78619050651
<< 10.0 << 50.0 << 190.0 << 50.0
<< int(QLineF::BoundedIntersection)
<< 100.1599256468622
<< 50.0;
QLineF baseA(0, -50, 0, 50);
QLineF baseB(-50, 0, 50, 0);
for (int i = 0; i < 1000; ++i) {
QLineF a = QLineF::fromPolar(50, i);
a.setP1(-a.p2());
QLineF b = QLineF::fromPolar(50, i * 0.997 + 90);
b.setP1(-b.p2());
// make the qFuzzyCompare be a bit more lenient
a = a.translated(1, 1);
b = b.translated(1, 1);
QTest::newRow(("rotation-" + QByteArray::number(i)).constData())
<< (double)a.x1() << (double)a.y1() << (double)a.x2() << (double)a.y2()
<< (double)b.x1() << (double)b.y1() << (double)b.x2() << (double)b.y2()
<< int(QLineF::BoundedIntersection)
<< 1.0
<< 1.0;
}
}
