valentina/widgets/vcontrolpointspline.cpp

131 lines
5.5 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wconversion"
#pragma GCC diagnostic ignored "-Wsign-conversion"
#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
#include "vcontrolpointspline.h"
#include <QPen>
#include <QBrush>
#include <QGraphicsScene>
#include <QDebug>
#pragma GCC diagnostic pop
VControlPointSpline::VControlPointSpline(const qint32 &indexSpline, SplinePoint::Position position,
const QPointF &controlPoint, const QPointF &splinePoint,
QGraphicsItem *parent):QGraphicsEllipseItem(parent),
radius(1.5*PrintDPI/25.4), controlLine(0), indexSpline(indexSpline), position(position){
//create circle
QRectF rec = QRectF(0, 0, radius*2, radius*2);
rec.translate(-rec.center().x(), -rec.center().y());
this->setRect(rec);
this->setPen(QPen(Qt::black, widthHairLine));
this->setBrush(QBrush(Qt::NoBrush));
this->setFlag(QGraphicsItem::ItemIsSelectable, true);
this->setFlag(QGraphicsItem::ItemIsMovable, true);
this->setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
this->setAcceptHoverEvents(true);
this->setPos(controlPoint);
//Лінія, що з'єднує дві точки
QPointF p1, p2;
LineIntersectCircle(QPointF(), radius, QLineF( QPointF(), splinePoint-controlPoint), p1, p2);
controlLine = new QGraphicsLineItem(QLineF(splinePoint-controlPoint, p1), this);
controlLine->setPen(QPen(Qt::red, widthHairLine));
controlLine->setFlag(QGraphicsItem::ItemStacksBehindParent, true);
}
void VControlPointSpline::hoverMoveEvent(QGraphicsSceneHoverEvent *event){
Q_UNUSED(event);
this->setPen(QPen(Qt::black, widthMainLine));
}
void VControlPointSpline::hoverLeaveEvent(QGraphicsSceneHoverEvent *event){
Q_UNUSED(event);
this->setPen(QPen(Qt::black, widthHairLine));
}
QVariant VControlPointSpline::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value){
if (change == ItemPositionChange && scene()) {
// value - new position.
QPointF newPos = value.toPointF();
emit ControlPointChangePosition(indexSpline, position, newPos);
}
return QGraphicsItem::itemChange(change, value);
}
qint32 VControlPointSpline::LineIntersectCircle(QPointF center, qreal radius, QLineF line, QPointF &p1,
QPointF &p2) const{
const qreal eps = 1e-8;
//коефіцієнти для рівняння відрізку
qreal a = line.p2().y() - line.p1().y();
qreal b = line.p1().x() - line.p2().x();
// В даному випадку не використовується.
//qreal c = - a * line.p1().x() - b * line.p1().y();
// проекция центра окружности на прямую
QPointF p = ClosestPoint (line, center);
// сколько всего решений?
qint32 flag = 0;
qreal d = QLineF (center, p).length();
if (qAbs (d - radius) <= eps){
flag = 1;
} else {
if (radius > d){
flag = 2;
} else {
return 0;
}
}
// находим расстояние от проекции до точек пересечения
qreal k = sqrt (radius * radius - d * d);
qreal t = QLineF (QPointF (0, 0), QPointF (b, - a)).length();
// добавляем к проекции векторы направленные к точкам пеерсечения
p1 = addVector (p, QPointF (0, 0), QPointF (- b, a), k / t);
p2 = addVector (p, QPointF (0, 0), QPointF (b, - a), k / t);
return flag;
}
QPointF VControlPointSpline::ClosestPoint(QLineF line, QPointF p) const{
QLineF lineP2pointFrom = QLineF(line.p2(), p);
qreal angle = 180-line.angleTo(lineP2pointFrom)-90;
QLineF pointFromlineP2 = QLineF(p, line.p2());
pointFromlineP2.setAngle(pointFromlineP2.angle()+angle);
QPointF point;
QLineF::IntersectType type = pointFromlineP2.intersect(line,&point);
if ( type == QLineF::BoundedIntersection ){
return point;
} else{
if ( type == QLineF::NoIntersection || type == QLineF::UnboundedIntersection ){
Q_ASSERT_X(type != QLineF::BoundedIntersection, Q_FUNC_INFO, "Немає точки перетину.");
return point;
}
}
return point;
}
QPointF VControlPointSpline::addVector(QPointF p, QPointF p1, QPointF p2, qreal k) const{
return QPointF (p.x() + (p2.x() - p1.x()) * k, p.y() + (p2.y() - p1.y()) * k);
}
void VControlPointSpline::RefreshLine(const qint32 &indexSpline, SplinePoint::Position pos,
const QPointF &controlPoint, const QPointF &splinePoint){
if(this->indexSpline == indexSpline && this->position == pos){
QPointF p1, p2;
LineIntersectCircle(QPointF(), radius, QLineF( QPointF(), splinePoint-controlPoint), p1, p2);
controlLine->setLine(QLineF(splinePoint-controlPoint, p1));
}
}
void VControlPointSpline::setEnabledPoint(bool enable){
if(enable == true){
this->setPen(QPen(Qt::black, widthHairLine));
this->setFlag(QGraphicsItem::ItemIsSelectable, true);
this->setFlag(QGraphicsItem::ItemIsMovable, true);
this->setAcceptHoverEvents(true);
} else {
this->setPen(QPen(Qt::gray, widthHairLine));
this->setFlag(QGraphicsItem::ItemIsSelectable, false);
this->setFlag(QGraphicsItem::ItemIsMovable, false);
this->setAcceptHoverEvents(false);
}
}