#include "graphicsItem/graphicsBaseItem.h"

GraphicsBaseItem::GraphicsBaseItem(QGraphicsItem *parent)
    :QGraphicsItem(parent)
{
    //初始化缩放操作用的handle
    m_vecHanle.reserve(H_left);
    for(int i = H_leftTop; i <= H_left; i++)
    {
        ItemControlHandle* pHandle = new ItemControlHandle(this);
        pHandle->setType(T_resize);
        pHandle->setTag(i);
        m_vecHanle.push_back(pHandle);
    }

    setFlag(QGraphicsItem::ItemIsMovable, true);
    setFlag(QGraphicsItem::ItemIsSelectable, true);
    setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
    setAcceptHoverEvents(true);
}

GraphicsBaseItem::~GraphicsBaseItem()
{
    for (size_t i = 0; i < m_vecHanle.size(); i++)
    {
        ItemControlHandle* pHandle = m_vecHanle[i];
        if (pHandle)
        {
            delete pHandle;
            pHandle = nullptr;
        }
    }
}

void GraphicsBaseItem::setWidth(double width)
{
    m_dWidth = width;
    updateCoordinate();
}

void GraphicsBaseItem::setHeight(double height)
{
    m_dHeight = height;
    updateCoordinate();
}

QVariant GraphicsBaseItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant& value)
{
    if (change == QGraphicsItem::ItemSelectedHasChanged)
    {
        QGraphicsItemGroup *group = dynamic_cast<QGraphicsItemGroup *>(parentItem());
        if(!group)
            setHandleVisible(value.toBool());
        else //在某一组群中，由组群展示是否选中，自身不做展示
        {
            setSelected(false);
            return QVariant::fromValue<bool>(false);
        }
    }
    return QGraphicsItem::itemChange(change, value);
}

void GraphicsBaseItem::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
{
    Q_UNUSED(event);
}

void GraphicsBaseItem::setHandleVisible(bool visible)
{
    for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
    {
        if(visible)
            (*it)->show();
        else
            (*it)->hide();
    }
}

QPointF GraphicsBaseItem::getSymmetricPointPos(int nHandle)
{
    QPointF pt;
    //编号从1开始，因此下标需要-1
    switch (nHandle)
    {
    case H_leftTop:
        pt = m_vecHanle.at(H_rightBottom - 1)->pos();
        break;
    case H_top:
        pt = m_vecHanle.at(H_bottom - 1)->pos();
        break;
    case H_rightTop:
        pt = m_vecHanle.at(H_leftBottom - 1)->pos();
        break;
    case H_right:
        pt = m_vecHanle.at(H_left - 1)->pos();
        break;
    case H_rightBottom:
        pt = m_vecHanle.at(H_leftTop - 1)->pos();
        break;
    case H_bottom:
        pt = m_vecHanle.at(H_top - 1)->pos();
        break;
    case H_leftBottom:
        pt = m_vecHanle.at(H_rightTop - 1)->pos();
        break;
    case H_left:
        pt = m_vecHanle.at(H_right - 1)->pos();
        break;
    default:
        break;
    }

    return pt;
}

void GraphicsBaseItem::updateHandles()
{
    const QRectF& boundRect = this->boundingRect();
    for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
    {
        switch ((*it)->getTag()) {
        case H_leftTop:
            (*it)->move(boundRect.x(), boundRect.y());
            break;
        case H_top:
            (*it)->move(boundRect.x() + boundRect.width() * 0.5, boundRect.y());
            break;
        case H_rightTop:
            (*it)->move(boundRect.x() + boundRect.width(), boundRect.y());
            break;
        case H_right:
            (*it)->move(boundRect.x() + boundRect.width(), boundRect.y() + boundRect.height() * 0.5);
            break;
        case H_rightBottom:
            (*it)->move(boundRect.x() + boundRect.width(), boundRect.y() + boundRect.height());
            break;
        case H_bottom:
            (*it)->move(boundRect.x() + boundRect.width() * 0.5, boundRect.y() + boundRect.height());
            break;
        case H_leftBottom:
            (*it)->move(boundRect.x(), boundRect.y() + boundRect.height());
            break;
        case H_left:
            (*it)->move(boundRect.x(), boundRect.y() + boundRect.height() * 0.5);
            break;
        default:
            break;
        }
    }
}