221 lines
8.3 KiB
C++
221 lines
8.3 KiB
C++
#include "vtoolpoint.h"
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#include <QPen>
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#include <QBrush>
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#include <QDebug>
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#include <QGraphicsItem>
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#include <cmath>
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#include "../container/vpointf.h"
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#include "../widgets/vmaingraphicsscene.h"
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VToolPoint::VToolPoint(VDomDocument *doc, VContainer *data, qint64 id,
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QGraphicsItem *parent):VAbstractTool(doc, data, id), QGraphicsEllipseItem(parent){
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radius = 1.5*PrintDPI/25.4;
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//create circle
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VPointF point = data->GetPoint(id);
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QRectF rec = QRectF(point.x(), point.y(), radius*2, radius*2);
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rec.translate(point.x()-rec.center().x(), point.y()-rec.center().y());
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this->setRect(rec);
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this->setPen(QPen(Qt::black, widthHairLine));
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this->setBrush(QBrush(Qt::NoBrush));
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this->setFlag(QGraphicsItem::ItemIsSelectable, true);
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this->setAcceptHoverEvents(true);
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//Тексто мітка точки
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namePoint = new VGraphicsSimpleTextItem(point.name(), this);
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rec = this->rect();
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namePoint->setPos(QPointF(rec.center().x()+point.mx(), rec.center().y()+point.my()));
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connect(namePoint, &VGraphicsSimpleTextItem::NameChangePosition, this,
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&VToolPoint::NameChangePosition);
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//Лінія, що з'єднує точку і мітку
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QRectF nameRec = namePoint->sceneBoundingRect();
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QPointF p1, p2;
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LineIntersectCircle(rec.center(), radius, QLineF(rec.center(), nameRec.center()), p1, p2);
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QPointF pRec = LineIntersectRect(nameRec, QLineF(rec.center(), nameRec.center()));
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lineName = new QGraphicsLineItem(QLineF(p1, pRec), this);
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lineName->setFlag(QGraphicsItem::ItemStacksBehindParent, true);
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if(QLineF(p1, pRec).length() <= 4*PrintDPI/25.4){
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lineName->setVisible(false);
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} else {
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lineName->setVisible(true);
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}
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}
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void VToolPoint::NameChangePosition(const QPointF pos){
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VPointF point = VAbstractTool::data->GetPoint(id);
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QRectF rec = this->rect();
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point.setMx(pos.x() - rec.center().x());
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point.setMy(pos.y() - rec.center().y());
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RefreshLine();
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LiteUpdateFromGui(point.mx(), point.my());
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VAbstractTool::data->UpdatePoint(id, point);
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}
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/*
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* Взято з сайту http://hardfire.ru/cross_line_circle
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*/
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qint32 VToolPoint::LineIntersectCircle(QPointF center, qreal radius, QLineF line, QPointF &p1,
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QPointF &p2) const{
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const qreal eps = 1e-8;
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//коефіцієнти для рівняння відрізку
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qreal a = line.p2().y() - line.p1().y();
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qreal b = line.p1().x() - line.p2().x();
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// В даному випадку не використовується.
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//qreal c = - a * line.p1().x() - b * line.p1().y();
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// проекция центра окружности на прямую
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QPointF p = ClosestPoint (line, center);
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// сколько всего решений?
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qint32 flag = 0;
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qreal d = QLineF (center, p).length();
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if (qAbs (d - radius) <= eps){
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flag = 1;
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} else {
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if (radius > d){
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flag = 2;
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} else {
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return 0;
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}
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}
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// находим расстояние от проекции до точек пересечения
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qreal k = sqrt (radius * radius - d * d);
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qreal t = QLineF (QPointF (0, 0), QPointF (b, - a)).length();
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// добавляем к проекции векторы направленные к точкам пеерсечения
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p1 = add_vector (p, QPointF (0, 0), QPointF (- b, a), k / t);
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p2 = add_vector (p, QPointF (0, 0), QPointF (b, - a), k / t);
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return flag;
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}
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/*
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* Добавление вектора к точке
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* Взято з сайту http://hardfire.ru/add_vector
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*/
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QPointF VToolPoint::add_vector (QPointF p, QPointF p1, QPointF p2, qreal k) const{
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return QPointF (p.x() + (p2.x() - p1.x()) * k, p.y() + (p2.y() - p1.y()) * k);
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}
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QPointF VToolPoint::ClosestPoint(QLineF line, QPointF p) const{
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QLineF lineP2pointFrom = QLineF(line.p2(), p);
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qreal angle = 180-line.angleTo(lineP2pointFrom)-90;
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QLineF pointFromlineP2 = QLineF(p, line.p2());
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pointFromlineP2.setAngle(pointFromlineP2.angle()+angle);
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QPointF point;
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QLineF::IntersectType type = pointFromlineP2.intersect(line,&point);
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if ( type == QLineF::BoundedIntersection ){
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return point;
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} else{
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if ( type == QLineF::NoIntersection || type == QLineF::UnboundedIntersection ){
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Q_ASSERT_X(type != QLineF::BoundedIntersection, Q_FUNC_INFO, "Немає точки перетину.");
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return point;
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}
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}
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return point;
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}
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QPointF VToolPoint::LineIntersectRect(QRectF rec, QLineF line) const{
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qreal x1, y1, x2, y2;
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rec.getCoords(&x1, &y1, &x2, &y2);
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QPointF point;
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QLineF::IntersectType type = line.intersect(QLineF(QPointF(x1,y1), QPointF(x1,y2)),&point);
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if ( type == QLineF::BoundedIntersection ){
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return point;
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}
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type = line.intersect(QLineF(QPointF(x1,y1), QPointF(x2,y1)),&point);
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if ( type == QLineF::BoundedIntersection ){
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return point;
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}
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type = line.intersect(QLineF(QPointF(x1,y2), QPointF(x2,y2)),&point);
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if ( type == QLineF::BoundedIntersection ){
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return point;
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}
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type = line.intersect(QLineF(QPointF(x2,y1), QPointF(x2,y2)),&point);
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if ( type == QLineF::BoundedIntersection ){
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return point;
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}
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Q_ASSERT_X(type != QLineF::BoundedIntersection, Q_FUNC_INFO, "Немає точки перетину.");
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return point;
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}
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void VToolPoint::RefreshLine(){
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QRectF nameRec = namePoint->sceneBoundingRect();
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QPointF p1, p2;
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QRectF rec = this->rect();
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LineIntersectCircle(rec.center(), radius, QLineF(rec.center(), nameRec.center()), p1, p2);
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QPointF pRec = LineIntersectRect(nameRec, QLineF(rec.center(), nameRec.center()));
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lineName->setLine(QLineF(p1, pRec));
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if(QLineF(p1, pRec).length() <= 4*PrintDPI/25.4){
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lineName->setVisible(false);
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} else {
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lineName->setVisible(true);
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}
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}
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void VToolPoint::LiteUpdateFromGui(qreal mx, qreal my){
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QDomElement domElement = doc->elementById(QString().setNum(id));
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if(domElement.isElement()){
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domElement.setAttribute("mx", QString().setNum(mx/PrintDPI*25.4));
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domElement.setAttribute("my", QString().setNum(my/PrintDPI*25.4));
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emit haveLiteChange();
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}
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}
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void VToolPoint::ChangedActivDraw(const QString newName){
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if(nameActivDraw == newName){
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this->setPen(QPen(Qt::black, widthHairLine));
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this->setFlag(QGraphicsItem::ItemIsSelectable, true);
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namePoint->setFlag(QGraphicsItem::ItemIsMovable, true);
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namePoint->setFlag(QGraphicsItem::ItemIsSelectable, true);
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namePoint->setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
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namePoint->setBrush(QBrush(Qt::black));
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namePoint->setAcceptHoverEvents(true);
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lineName->setPen(QPen(Qt::black, widthHairLine));
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this->setAcceptHoverEvents(true);
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VAbstractTool::ChangedActivDraw(newName);
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} else {
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this->setPen(QPen(Qt::gray, widthHairLine));
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this->setFlag(QGraphicsItem::ItemIsSelectable, false);
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namePoint->setFlag(QGraphicsItem::ItemIsMovable, false);
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namePoint->setFlag(QGraphicsItem::ItemIsSelectable, false);
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namePoint->setFlag(QGraphicsItem::ItemSendsGeometryChanges, false);
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namePoint->setBrush(QBrush(Qt::gray));
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namePoint->setAcceptHoverEvents(false);
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lineName->setPen(QPen(Qt::gray, widthHairLine));
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this->setAcceptHoverEvents (false);
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VAbstractTool::ChangedActivDraw(newName);
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}
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}
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void VToolPoint::mouseReleaseEvent ( QGraphicsSceneMouseEvent * event ){
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if(event->button() == Qt::LeftButton){
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emit ChoosedPoint(id, Scene::Point);
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}
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QGraphicsItem::mouseReleaseEvent(event);
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}
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void VToolPoint::RefreshBaseGeometry(const QString &name, const qreal &x, const qreal &y, const qreal &mx,
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const qreal &my){
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QRectF rec = QRectF(x, y, radius*2, radius*2);
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rec.translate(x-rec.center().x(), y-rec.center().y());
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this->setRect(rec);
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rec = this->rect();
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namePoint->setText(name);
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namePoint->setPos(QPointF(rec.center().x()+mx, rec.center().y()+my));
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RefreshLine();
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}
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void VToolPoint::hoverMoveEvent(QGraphicsSceneHoverEvent *event){
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Q_UNUSED(event);
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this->setPen(QPen(Qt::black, widthMainLine));
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}
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void VToolPoint::hoverLeaveEvent(QGraphicsSceneHoverEvent *event){
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Q_UNUSED(event);
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this->setPen(QPen(Qt::black, widthHairLine));
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}
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VToolPoint::~VToolPoint(){
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}
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