#include "DraggableLine.h"
#include <QGraphicsSceneMouseEvent>
#include <QPainter>
#include <QDebug>
#include <QGraphicsScene>

RulerLineItem::RulerLineItem(const QLineF& line, QGraphicsItem* parent)
    : QGraphicsLineItem(line, parent) {
    initRuler();
    createHandles();
}

int RulerLineItem::type() const
{
    return Type;
}

void RulerLineItem::initRuler() {
    // 初始化标尺样式
    setPen(QPen(Qt::red, 2));
    createTextItem();
    setFlags(QGraphicsItem::ItemIsSelectable |
        QGraphicsItem::ItemSendsGeometryChanges);
}

void RulerLineItem::createTextItem() {
    m_textItem = new QGraphicsTextItem(this);
    m_textItem->setDefaultTextColor(Qt::black);
    m_textItem->setFont(QFont("Arial", 8));
    updateTextPosition();
}

void RulerLineItem::createHandles() {
    // 创建可拖动端点
    m_startHandle = new HandleItem(this);
    m_endHandle = new HandleItem(this);
    m_startHandle->setPos(line().p1());
    m_endHandle->setPos(line().p2());
    connect(m_startHandle, &HandleItem::positionChanged, this, &RulerLineItem::updateLineFromHandles);
    connect(m_endHandle, &HandleItem::positionChanged, this, &RulerLineItem::updateLineFromHandles);
}

void RulerLineItem::updateHandlePositions() {
    QLineF l = line();
    m_startHandle->setPos(l.p1());
    m_endHandle->setPos(l.p2());
    updateHandlesSignal(l.p1(), l.p2());
}

void RulerLineItem::updateTextPosition()
{
    m_textItem->setPos(line().center());
}

void RulerLineItem::setRulerText(const QString& strText)
{
    m_strRulerText = strText;
    m_textItem->setPlainText(strText);
}

void RulerLineItem::updateLineFromHandles()
{
    QLineF newLine(m_startHandle->pos(), m_endHandle->pos());
    setLine(newLine);
    updateTextPosition();
    //       qreal length = line().length();
    //       QString strText = QString("%1 px").arg(length, 0, 'f', 1);
    //       setRulerText(strText);
}