#include "TransparentDraggableLine.h"

extern double g_dPixelPerCm;//每厘米像素数
//static GeoIndicatorGenerator m_drawGeo;

TransparentDraggableLine::TransparentDraggableLine(QMyCustomPlot *parentPlot,  QString strUuid, double minWidth, QString strTitle)
        : QObject(parentPlot), mPlot(parentPlot), mstrTitle(strTitle), mMinWidth(minWidth)
{
    m_strUuid = strUuid;
    //
    initRect();
}

TransparentDraggableLine::~TransparentDraggableLine()
{
    if(mPlot)
    {
    }
}

//设置最小宽度
void TransparentDraggableLine::setMinWidth(double minWidth)
{
    mMinWidth = minWidth;
}

//设置标题
void TransparentDraggableLine::setTitle(QString strTitle)
{
    mstrTitle = strTitle;
    //mPlot->replot();
}

// 设置矩形范围
void TransparentDraggableLine::setRange(double left_Low, double right_Hight)
{
    double lY1 = mPlot->yAxis->range().lower;//+10
    double lY2 = mPlot->yAxis->range().upper;

    for(int i =0; i<mPlot->m_x.size(); i++)
    {
        if(abs(mPlot->m_x[i]-left_Low) < 0.1)
        {
            lY1 = mPlot->m_y[i];
            break;
        }
    }
    m_lY1 = lY1;

    qcpItemLine->start->setCoords(left_Low, lY1);//圆心位置
    qcpItemLine->end->setCoords(right_Hight, lY2);//圆心位置

    //updateHandles();
    mPlot->replot();
}

// 获取当前范围
void TransparentDraggableLine::getRange()
{    
    m_left_Low = qcpItemLine->start->coords().x();
    m_right_Hight = qcpItemLine->end->coords().x();
}

// 设置矩形颜色
void TransparentDraggableLine::setColor(const QColor &color)
{
}

// 删除框图
void TransparentDraggableLine::deleteRect()
{
    if(mPlot) {
        mPlot->m_mapDraggable_Line.remove(m_strUuid);

        mPlot->removeItem(qcpItemLine);

        mPlot->replot();
        this->deleteLater();
    }
}


void TransparentDraggableLine::initRect()
{
    // 连接鼠标事件
    connect(mPlot, &QCustomPlot::mousePress, this, &TransparentDraggableLine::onMousePress);
    connect(mPlot, &QCustomPlot::mouseMove, this, &TransparentDraggableLine::onMouseMove);
    connect(mPlot, &QCustomPlot::mouseRelease, this, &TransparentDraggableLine::onMouseRelease);

    qcpItemLine = new QCPItemLine(mPlot);
    qcpItemLine->setPen(QPen(Qt::blue));
    qcpItemLine->setLayer("overlay"); // 确保在最上层

    //上下边界
    updateHandles();
}

void TransparentDraggableLine::updateHandles()
{

}

void TransparentDraggableLine::onDelRect()
{
    //mDragMode = DragNone;
    //删除框图
    deleteRect();
}


void TransparentDraggableLine::onMousePress(QMouseEvent *event)
{
    if(event->button() != Qt::LeftButton)//右键
    {
//        QMenu menu(nullptr);
//        QAction *delAction = menu.addAction("删除框图");
//        connect(delAction, &QAction::triggered, this, &TransparentDraggableLine::onDelRect);

//        menu.exec(event->globalPos());
//        return;
    }

    event->accept();

    // 检查点击了哪个部分
    double y = mPlot->xAxis->pixelToCoord(event->pos().y());//x轴展示深度
    double x = mPlot->yAxis->pixelToCoord(event->pos().x());
    //double lY1 = mPlot->yAxis->range().lower;//+10
    double lY2 = mPlot->yAxis->range().upper;

    if(qcpItemLine->selectTest(event->pos(), false) < 5)
    {
        if(mPlot->m_SelectShiftLine)
        {
            //之前的选中线段，恢复黑色
            TransparentDraggableLine *tmpLine = (TransparentDraggableLine*)mPlot->m_SelectShiftLine;
            tmpLine->qcpItemLine->setPen(QPen(Qt::blue));
        }

        //重新设置选中线段
        mPlot->m_SelectShiftLine = this;
        qcpItemLine->setPen(QPen(Qt::red));

        double delta = (m_lY1+lY2)/10.0;
        if(x < m_lY1+delta)
        {
            mDragMode = DragLeft;
        }
        else if(x > lY2-delta)
        {
            mDragMode = DragRight;
        }
        else
        {
            mDragMode = DragRect;
        }
    }
    else {
        mDragMode = DragNone;
        return;
    }

    getRange();

    mDragStartY = y;
}

void TransparentDraggableLine::onMouseMove(QMouseEvent *event)
{
    if(mDragMode == DragNone) return;

    event->accept();

    //double x = mPlot->xAxis->pixelToCoord(event->pos().x());
    //double dx = x - mDragStartX;

    double y = mPlot->xAxis->pixelToCoord(event->pos().y());
    double dy = y - mDragStartY;
    mDragStartY = y;

    switch(mDragMode) {
    case DragLeft: {
        m_left_Low = m_left_Low + dy;
        break;
    }
    case DragRight: {
        m_right_Hight = m_right_Hight + dy;
        break;
    }
    case DragRect: {
        m_left_Low = m_left_Low + dy;
        m_right_Hight = m_right_Hight + dy;
        break;
    }
    default:
        break;
    }

    setRange(m_left_Low, m_right_Hight);
}

void TransparentDraggableLine::onMouseRelease(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton && mDragMode != DragNone) {
        event->accept();
        //避免二次绘制框图
        mPlot->m_bDrawRect = false;
        //emit rangeChanged(getRange());
        mDragMode = DragNone;
        //取消选中状态
//            QCPDataSelection emptySelection;
//            mPlot->graph(0)->setSelection(emptySelection);
//            mPlot->replot();

        //取消选中框
        mPlot->selectionRect()->cancel();
        mPlot->replot();
        mPlot->selectionRect()->mActive=true;
    }
}