47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
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#include "JunctionItem.h"
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#include "ArrowItem.h"
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#include <QPainter>
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#include <QStyleOptionGraphicsItem>
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#include <cmath>
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JunctionItem::JunctionItem(QGraphicsItem* parent, int id)
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: QGraphicsObject(parent),
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m_id(id)
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{
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setFlags(ItemIsMovable | ItemIsSelectable | ItemSendsGeometryChanges);
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setZValue(1); // slightly above arrows
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}
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QRectF JunctionItem::boundingRect() const {
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return QRectF(-m_radius - 2, -m_radius - 2, (m_radius + 2) * 2, (m_radius + 2) * 2);
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}
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void JunctionItem::paint(QPainter* p, const QStyleOptionGraphicsItem*, QWidget*) {
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p->setRenderHint(QPainter::Antialiasing, true);
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p->setPen(Qt::NoPen);
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p->setBrush(isSelected() ? QColor(40, 100, 255) : QColor(30, 30, 30));
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p->drawEllipse(QPointF(0, 0), m_radius, m_radius);
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}
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void JunctionItem::addArrow(ArrowItem* a) {
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m_arrows.insert(a);
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}
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void JunctionItem::removeArrow(ArrowItem* a) {
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m_arrows.remove(a);
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}
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bool JunctionItem::hitTest(const QPointF& scenePos, qreal radius) const {
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const QPointF local = mapFromScene(scenePos);
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return std::hypot(local.x(), local.y()) <= radius;
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}
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QVariant JunctionItem::itemChange(GraphicsItemChange change, const QVariant& value) {
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if (change == ItemPositionHasChanged || change == ItemTransformHasChanged) {
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for (ArrowItem* a : m_arrows) {
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if (a) a->updatePath();
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}
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}
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return QGraphicsObject::itemChange(change, value);
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}
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