#include "MyCustomGraphicsItem.h"
#include <QDebug>
#include <QMessageBox>


CMyCustomGraphicsItem::CMyCustomGraphicsItem(QObject *parent) : QObject(parent)
{

}

void CMyCustomGraphicsItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsItem::mouseDoubleClickEvent(event);
    qDebug() << "mouseDoubleClickEvent" << event->scenePos() <<endl;
    //QGraphicsItem *item = scene.itemAt(mapToScene(event->pos()), QTransform());

//    QMessageBox msgBox; // 生成对象
//    msgBox.setText("This is Rect."); // 设置文本
//    int ret = msgBox.exec(); // 执行

//    emit doubleclick(event);
}

void CMyCustomGraphicsItem::wheelEvent(QGraphicsSceneWheelEvent *event)
{
//    if(event->delta() > 0){

//    }
}
//显示范围
float LineItem::maxX()
{
    return m_maxX;
}
void LineItem::setMaxX(float value)
{
    if (m_maxX == value) {
        return;
    }
    //通知Scene边界范围发生了变化,如果不调用的话
    //缓存的边界范围不会发生变化
    prepareGeometryChange();
    m_maxX = value;
}

void LineItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    if (event->button() & Qt::LeftButton)
    {
//        float x = event->pos().x();
//        QPointF point(x, 5*sin(x));
//        static const float r = 0.3;
//        QGraphicsEllipseItem *ellipse = new QGraphicsEllipseItem(-r, -r, 2 * r, 2 * r, this);
//        ellipse->setPen(Qt::NoPen);
//        ellipse->setBrush(QBrush(Qt::red));
//        ellipse->setPos(point);
//        event->accept();
    }
    //右键刷新显示范围
    else if(event->button() & Qt::RightButton)
    {
        int value = m_maxX + 5;
        setMaxX(value);
        event->accept();
    }
    else
    {
         event->ignore();
    }
}