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79 lines
2.0 KiB
79 lines
2.0 KiB
#include "node.h"
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#include <QPainter>
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#include <QStyleOption>
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#include <QDebug>
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#include <QGraphicsSceneMouseEvent>
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Node::Node(GraphWidget *parent) : m_graph(parent)
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{
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qDebug() << __PRETTY_FUNCTION__;
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setFlag(ItemIsMovable);
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setFlag(ItemSendsGeometryChanges);
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setCacheMode(DeviceCoordinateCache);
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// setZValue(1);
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// shall I use system colors?
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setDefaultTextColor(QColor(0,0,0));
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// shall I set it after some spec key?
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// setTextInteractionFlags(Qt::TextEditorInteraction);
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}
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void Node::addEdge(Edge *edge)
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{
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qDebug() << __PRETTY_FUNCTION__;
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m_edgeList << edge;
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edge->adjust();
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}
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QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value)
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{
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qDebug() << __PRETTY_FUNCTION__;
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switch (change) {
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case ItemPositionChange:
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if (change == ItemPositionChange && scene()) {
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// value is the new position.
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QPointF newPos = value.toPointF();
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QRectF rect (scene()->sceneRect().topLeft(),
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scene()->sceneRect().bottomRight()-boundingRect().bottomRight());
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if (!rect.contains(newPos))
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{
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// Keep the item inside the scene rect.
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newPos.setX(qMin(rect.right(), qMax(newPos.x(), rect.left())));
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newPos.setY(qMin(rect.bottom(), qMax(newPos.y(), rect.top())));
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return newPos;
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}
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}
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break;
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case ItemPositionHasChanged:
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foreach (Edge *edge, m_edgeList) edge->adjust();
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break;
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default:
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break;
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};
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return QGraphicsItem::itemChange(change, value);
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}
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void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *w)
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{
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qDebug() << __PRETTY_FUNCTION__;
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QGraphicsTextItem::paint(painter, option, w);
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painter->setPen(QPen(Qt::blue));
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painter->drawRect(QRect(boundingRect().topLeft().toPoint(),
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boundingRect().bottomRight().toPoint() -
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QPoint(1,1)));
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}
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