DiagramDesigner/diagramCavas/source/baseModelItem/electricBaseModelLineItem.cpp

#include "baseModelItem/electricBaseModelLineItem.h"
#include <QGraphicsScene>
#include <QPainter>
#include <QStyleOptionGraphicsItem>

ElectricBaseModelLineItem::ElectricBaseModelLineItem(QGraphicsItem *parent)
    : GraphicsBaseModelItem(parent)
{
    m_boundingRect = QRectF();
    m_pen = QPen(Qt::black);
    m_brush = QBrush(Qt::NoBrush);
    setHandleVisible(false);
    setFunctionHandleIfShow(false);
    setFunctionHandleEnaable(false);
    m_lstPoints.push_back(QPointF());       //起点
    m_lstPoints.push_back(QPointF());       //终点
    _curLine = QPoint();
}

ElectricBaseModelLineItem::~ElectricBaseModelLineItem()
{
}

ElectricBaseModelLineItem::ElectricBaseModelLineItem(const ElectricBaseModelLineItem& obj)
    :GraphicsBaseModelItem(obj)
{
    m_pen = QPen(Qt::black);
    m_brush = QBrush(Qt::NoBrush);
    setHandleVisible(false);
    setFunctionHandleIfShow(false);
    setFunctionHandleEnaable(false);

    m_points = obj.m_points;
    m_pointsBoundingRect = obj.m_pointsBoundingRect;       //包裹点的矩形集合
    m_lstPoints = obj.m_lstPoints;
    _curLine = obj._curLine;
}

ElectricBaseModelLineItem* ElectricBaseModelLineItem::clone() const
{
    ElectricBaseModelLineItem* newItem = new ElectricBaseModelLineItem(*this);
    return newItem;
}

void ElectricBaseModelLineItem::setStartPoint(const QPointF& p)
{
    int n = m_lstPoints.size();
    if(n)
    {
        if(n >2)
        {
            if(m_lstPoints[0].x() == m_lstPoints[1].x())        //相邻点在垂直方向，水平移动,否则垂直移动
            {
                m_lstPoints[1].setX(p.x());
            }
            else
            {
                m_lstPoints[1].setY(p.y());
            }
        }
        m_lstPoints[0] = p;
    }
}
void ElectricBaseModelLineItem::setEndPoint(const QPointF& p)
{
    int n = m_lstPoints.size();
    if(n)
    {
        if(n >2)
        {
            if(m_lstPoints[n-1].x() == m_lstPoints[n-2].x())    //相邻点在垂直方向，水平移动,否则垂直移动
            {
                m_lstPoints[n-2].setX(p.x());
            }
            else
            {
                m_lstPoints[n-2].setY(p.y());
            }
        }
        m_lstPoints[n-1] = p;
    }
}

QPainterPath ElectricBaseModelLineItem::shape() const
{
    QPainterPath path;
    //path.addPath(m_points);
    path.addPath(m_pointsBoundingRect);
    return path;
}

QRectF ElectricBaseModelLineItem::boundingRect() const
{
    return m_boundingRect;
}

void ElectricBaseModelLineItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    if (option->state & QStyle::State_Selected)
    {
        painter->setPen(QColor(135,206,235,180));
    }
    else
    {
        painter->setPen(m_pen);
        GraphicsBaseModelItem::paint(painter,option,widget);
    }

    painter->setBrush(m_brush);

    painter->drawPath(m_points);
}

void ElectricBaseModelLineItem::calculatePath()
{
    int n = m_lstPoints.size();
    prepareGeometryChange();
    m_points.clear();
    m_pointsBoundingRect.clear();

    if(m_lstPoints.size() == 2 && (m_lstPoints.first().x() != m_lstPoints.last().x()) && (m_lstPoints.first().y() != m_lstPoints.last().y()))
    {
        if(m_lstPoints.first().y() < m_lstPoints.last().y())
            m_lstPoints.insert(1,QPointF(m_lstPoints.first().x(),m_lstPoints.last().y()));
        else
            m_lstPoints.insert(1,QPointF(m_lstPoints.last().x(),m_lstPoints.first().y()));
    }
    m_points.moveTo(m_lstPoints.first());
    QPointF pLast = m_lstPoints.first();
    for(int i = 1;i <m_lstPoints.size();++i)
    {
        m_points.lineTo(m_lstPoints[i]);
        m_pointsBoundingRect.addRect(QRectF(QPointF(pLast.x()-1,pLast.y()-1),QPointF(m_lstPoints[i].x()+1,m_lstPoints[i].y()+1)));
        pLast = m_lstPoints[i];
    }
    m_boundingRect = m_points.boundingRect();
}