QCustomPlot绘制股票曲线，去除中间休市时间

QCPAxis中增加两个函数，设置x轴的值和标签映射关系，要把中午午休的时间去掉；

 

void setTickVector(QVector<double> tickVector) { mTickVector = tickVector; };

void setTickLabels(QVector<QString> tickLabel ) { mTickVectorLabels= tickLabel; }

void NGraph::SetXTimeLabel(QString strTimeFormat)
{
    //ui.NGragh->xAxis->setTickLabelType(QCPAxis::ltDateTime);
    //ui.NGragh->xAxis->setDateTimeFormat(strTimeFormat);
    //ui.NGragh->xAxis->setDateTimeSpec(Qt::LocalTime);
    //QSharedPointer<QCPAxisTickerDateTime> dateTimeTicker(new QCPAxisTickerDateTime);
    //dateTimeTicker->setDateTimeFormat(strTimeFormat);
    //dateTimeTicker->setDateTimeSpec(Qt::LocalTime);
    //ui.NGragh->xAxis->setTicker(dateTimeTicker);
    ui.NGragh->xAxis->setFixTickLabel(true);
    ui.NGragh->xAxis->setTickLabels(true); // 不显示这一段的刻度标签
    ui.NGragh->xAxis->setSubTicks(false);  // 不显示子刻度
    QTime time=QTime::fromString("0930", "hhmm");
    double starttime= time.hour()*3600+ time.minute()*60;
    ui.NGragh->xAxis->setTickVector(QVector<double>({ starttime,starttime +1800,starttime+1800*2,starttime+1800*3,starttime+1800*4,starttime+1800*5,starttime + 1800 *6,starttime + 1800 *7,starttime + 1800 * 8 }));
    ui.NGragh->xAxis->setTickLabels(QVector<QString>({"09:30","10:00","1030","11:00","11:30","13:30","14:00","14:30","15:00"}));
}

因为会自动生成坐标轴，所以需要再顶一个个变量，设置固定坐标轴

  ui.NGragh->xAxis->setFixTickLabel(true);
 void setFixTickLabel(bool fix) { mbFixTickLabel = fix; };
然后在生成坐标轴的地方加上判断，如果设置了true，则不自动生成标签

void QCPAxis::setupTickVectors()
{
  if (!mParentPlot) return;
  if ((!mTicks && !mTickLabels && !mGrid->visible()) || mRange.size() <= 0) return;
  if (mbFixTickLabel == false)
  {
      QVector<QString> oldLabels = mTickVectorLabels;
      mTicker->generate(mRange, mParentPlot->locale(), mNumberFormatChar, mNumberPrecision, mTickVector, mSubTicks ? &mSubTickVector : nullptr, mTickLabels ? &mTickVectorLabels : nullptr);
      mCachedMarginValid &= mTickVectorLabels == oldLabels; // if labels have changed, margin might have changed, too
  }
}

 

最后在生成数据的地方，如果是下午时间，则自动减去中午的休市的1个半小时，也就是5400秒，也是时间值前移5400秒，去掉休市时间，标签值映射关系则是向后移；这样看起来中间没有中断，而且时间标签也能对的上

if (it != m_mapMiniteData.end())
    {
        
        QVariantList listdata = it.value().value("listdata").toList();
        QVector<double> x, y;
        for (int i = 0; i < listdata.size(); i++)
        {
            if (listdata[i].toMap().value("time").toString() >= "1300")
            {
                QTime  time = QTime::fromString(listdata[i].toMap().value("time").toString(), "hhmm").addSecs(-5400);
                x.push_back(time.hour() * 3600 + time.minute() * 60);
            }
            else
            {
                QTime  time = QTime::fromString(listdata[i].toMap().value("time").toString(), "hhmm");
                x.push_back(time.hour() * 3600 + time.minute() * 60);
            }
            y.push_back(listdata[i].toMap().value("price").toDouble());
        }
        m_Graph.hide();
        m_Graph.SetData(0, x, y);
        m_Graph.show();
    }