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#include "connection.h"
#include <qtmipsexception.h>
#include <cmath>
using namespace coreview;
Connector::Connector(enum Axis ax) {
qx = 0;
qy = 0;
this->ax = ax;
}
void Connector::setPos(qreal x, qreal y) {
qx = x;
qy = y;
emit updated(point());
emit updated(vector());
}
void Connector::setPos(const QPointF &p) {
setPos(p.x(), p.y());
}
enum Connector::Axis Connector::axis() const {
return ax;
}
qreal Connector::x() const {
return qx;
}
qreal Connector::y() const {
return qy;
}
QPointF Connector::point() const {
return QPointF(qx, qy);
}
QLineF Connector::vector() const {
QPointF p = point();
switch (ax) {
case AX_X:
return QLineF(p, p + QPointF(1, 0));
case AX_Y:
return QLineF(p, p + QPointF(0, 1));
case AX_XY:
return QLineF(p, p + QPointF(1, 1));
case AX_MXY:
return QLineF(p, p + QPoint(1, -1));
}
throw QTMIPS_EXCEPTION(Sanity, "Connection::vector() unknown axes set", QString::number(ax));
}
Connection::Connection(const Connector *a, const Connector *b) : QGraphicsObject(nullptr) {
pen_width = 1;
ax_start = a->vector();
ax_end = a->vector();
connect(a, SIGNAL(updated(QLineF)), this, SLOT(moved_start(QLineF)));
connect(b, SIGNAL(updated(QLineF)), this, SLOT(moved_end(QLineF)));
moved_start(a->vector());
moved_end(b->vector());
}
void Connection::setHasText(bool has) {
if (has && value == nullptr) {
value = new QGraphicsSimpleTextItem(this);
value->setText(text);
} else if (!has && value != nullptr) {
delete value;
}
}
void Connection::setText(QString val) {
text = val;
if (value != nullptr)
value->setText(val);
}
void Connection::setAxes(QVector<QLineF> axes) {
break_axes = axes;
recalc_line();
}
void Connection::moved_start(QLineF p) {
ax_start = p;
recalc_line();
}
void Connection::moved_end(QLineF p) {
ax_end = p;
recalc_line();
}
QRectF Connection::boundingRect() const {
QRectF rect;
for (int i = 0; i < (points.size() - 1); i++) {
qreal x = points[i].x() > points[i+1].x() ? points[i+1].x() : points[i].x();
qreal y = points[i].y() > points[i+1].y() ? points[i+1].y() : points[i].y();
rect |= QRectF(x - pen_width/2.0, y - pen_width/2.0, fabs(points[i].x() - points[i+1].x()) + pen_width, fabs(points[i].y() - points[i+1].y()) + pen_width);
}
return rect;
}
void Connection::paint(QPainter *painter, const QStyleOptionGraphicsItem *option __attribute__((unused)), QWidget *widget __attribute__((unused))) {
QPen pen;
pen.setWidth(pen_width);
pen.setColor(color);
pen.setCapStyle(Qt::FlatCap);
pen.setJoinStyle(Qt::BevelJoin);
painter->setPen(pen);
painter->drawPolyline(QPolygonF(points));
}
void Connection::recalc_line() {
points.clear();
points.append(ax_start.p1());
QLineF cur_l = ax_start;
for (int i = 0; i < break_axes.size(); i++) {
if (recalc_line_add_point(cur_l, break_axes[i]))
cur_l = break_axes[i];
}
recalc_line_add_point(cur_l, ax_end);
points.append(ax_end.p1());
}
bool Connection::recalc_line_add_point(const QLineF &l1, const QLineF &l2) {
QPointF intersec;
if (l1.intersect(l2, &intersec) == QLineF::NoIntersection)
return false;
points.append(intersec);
return true;
}
Bus::Bus(const Connector *start, const Connector *end, unsigned width) : Connection(start, end) {
pen_width = width;
}
Bus::~Bus() {
for (int i = 0; i < conns.size(); i++)
delete conns[i].c;
}
void Bus::setAxes(QVector<QLineF> axes) {
Connection::setAxes(axes);
conns_update();
}
const Connector *Bus::new_connector(qreal x, qreal y, enum Connector::Axis axis) {
Connector *c = new Connector(axis);
conns.append({
.c = c,
.p = QPoint(x, y)
});
conns_update();
return c;
}
const Connector *Bus::new_connector(const QPointF &p, enum Connector::Axis axis) {
return new_connector(p.x(), p.y(), axis);
}
// Calculate closes point to given line. We do it by calculating rectangular intersection between given line and imaginary line crossing given point.
static qreal cu_closest(const QLineF &l, const QPointF &p, QPointF *intersec) {
// Closest point is on normal vector
QLineF normal = l.normalVector();
// Now move normal vector to 0,0 and then to p
QLineF nline = normal.translated(-normal.p1()).translated(p);
// And now found intersection
SANITY_ASSERT(l.intersect(nline, intersec) != QLineF::NoIntersection, "We are calculating intersection with normal vector and that should always have intersection");
// Now check if that point belongs to given line
// We know that this is intersection so just check if we are not outside of line limits
// TODO replace intersec if it's outside of given line with one of corner points
return (p - *intersec).manhattanLength(); // return length from each other
}
void Bus::conns_update() {
for (int i = 0; i < conns.size(); i++) {
QPointF closest;
qreal closest_range = 0; // Just to suppress warning. On first check the closest is null so we set it later on
QPointF inter;
qreal range;
for (int y = 0; y < (points.size() - 1); y++) {
range = cu_closest(QLineF(points[y], points[y+1]), QPointF(conns[i].p), &inter);
if (closest.isNull() || closest_range > range) {
closest = inter;
closest_range = range;
}
}
conns[i].c->setPos(closest);
}
}
Signal::Signal(const Connector *start, const Connector *end) : Connection(start, end) {
color = QColor(0, 0, 255);
}
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