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50
51#include "node.h"
52#include "stickman.h"
53
54#include <QRectF>
55#include <QPainter>
56#include <QGraphicsSceneMouseEvent>
57
58Node::Node(const QPointF &pos, QGraphicsItem *parent)
59 : QGraphicsObject(parent), m_dragging(false)
60{
61 setPos(pos);
62 setFlag(flag: QGraphicsItem::ItemSendsGeometryChanges);
63}
64
65Node::~Node()
66{
67}
68
69QRectF Node::boundingRect() const
70{
71 return QRectF(-6.0, -6.0, 12.0, 12.0);
72}
73
74void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
75{
76 painter->setPen(Qt::white);
77 painter->drawEllipse(center: QPointF(0.0, 0.0), rx: 5.0, ry: 5.0);
78}
79
80QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value)
81{
82 if (change == QGraphicsItem::ItemPositionChange)
83 emit positionChanged();
84
85 return QGraphicsObject::itemChange(change, value);
86}
87
88void Node::mousePressEvent(QGraphicsSceneMouseEvent *)
89{
90 m_dragging = true;
91}
92
93void Node::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
94{
95 if (m_dragging)
96 setPos(mapToParent(point: event->pos()));
97}
98
99void Node::mouseReleaseEvent(QGraphicsSceneMouseEvent *)
100{
101 m_dragging = false;
102}
103

source code of qtbase/examples/widgets/animation/stickman/node.cpp