在包含趋势点的数组中分配指向数据的指针！！ [英] Assigning a pointer to the data in an array containing Trend Points!!

问题描述

for (long trend = 1; trend <= m_Trends.GetCount(); trend++)
        {
            CRect    rect;
            float    iteration_factor;
            short    pen(0);
            CCsTrendPoint    trendpoint;
            CCsOpcValue        DisplayMaxPoint, DisplayMinPoint;
            POSITION pos;
            double        curtime;

            rect = CRect(CPoint(0,0), m_Trends[trend-1].m_TrendRect.Size());
            iteration_factor = m_TrendDurationSeconds/rect.right;

            for (pen = 0; pen < m_TrendItems.GetSize(); pen++)    // redraw each pen
            {
                pos = m_TrendItems[pen].GetTrendPoints().GetTailPosition();
                if(pos)
                    trendpoint = m_TrendItems[pen].GetTrendPoints().GetPrev(pos);

                while(pos)
                {
                    DisplayMaxPoint.SetValue(trendpoint.m_Value);
                    DisplayMaxPoint.SetTimeStamp(trendpoint.m_Time);
                    DisplayMinPoint.SetValue(trendpoint.m_Value);
                    DisplayMinPoint.SetTimeStamp(trendpoint.m_Time);

                    curtime = (trendpoint.m_Time).GetTotalSeconds();

                    while(pos && ((trendpoint.m_Time).GetTotalSeconds() >= curtime) && ((trendpoint.m_Time).GetTotalSeconds() < (curtime + iteration_factor)))
                    {
                        if(trendpoint.m_Value > DisplayMaxPoint.GetFloatValue())
                        {
                            DisplayMaxPoint.SetValue(trendpoint.m_Value);
                            DisplayMaxPoint.SetTimeStamp(trendpoint.m_Time);
                            MaxPoint = trendpoint;
                        }
                        if(trendpoint.m_Value < DisplayMinPoint.GetFloatValue())
                        {
                            DisplayMinPoint.SetValue(trendpoint.m_Value);
                            DisplayMinPoint.SetTimeStamp(trendpoint.m_Time);
                            MinPoint = trendpoint;
                        }
                        trendpoint = m_TrendItems[pen].GetTrendPoints().GetPrev(pos);
                    }
                    if (pen >= m_TrendDisplayItems.GetSize())
                    {
                        m_TrendDisplayItems.SetSize(pen+1);
                    }
                    m_TrendDisplayItems[pen].AddNewPoint(DisplayMaxPoint);
                    m_TrendDisplayItems[pen].AddNewPoint(DisplayMinPoint);
                }
            }
        }

我知道这是一个简单的问题.上面的方式是我将趋势数组的数据传递到新数组，但是出于传递数据的目的，我想传递趋势点的指针(MinPoint和MaxPoint)，我尝试了很多方法但无法做到这一点.

所以我的问题是，如何获取最小和最大点的指针以及如何将它们放置在数组中?请帮我急！！

I know this is a simple question. The above way i was passing the data of a trend array to the new array, but instaed of passing the data, i want to pass the pointer of the trendpoint(MinPoint and MaxPoint), i tried many ways but was not able to do it.

So my question is, how can i get the pointer of the min and max point and how to put these in an array? Plz help me its urgent!!

推荐答案

您能遵循吗? :):

Can you follow ? :) :

class CCsOpcValue;

class CTrend
{
  CArray<CCsOpcValue*,CCsOpcValue*> m_arDisplayItems;
..
public:
 ~CTrend() { RemoveDisplayItems(); };

 void FillDiasplayItems(..);
 void RemoveDisplayItems(int iHowMuch = -1);
 void DrawDisplayItems(CDC* pcDC, const CRect& crBounds, ...);
..
};

void CTrend::FillDisplayItems(..)
{
  for (..) {
    CCsOpcValue* pcMin = new CCsOpcValue(this, CCsOpcValue::minItem, ..);
    CCsOpcValue* pcMax = new CCsOpcValue(this, CCsOpcValue::maxItem, ..);
    while (..) {
      // Modifications of the values
      // ..
    }
    m_arDisplayItems.Add(pcMin);
    m_arDisplayItems.Add(pcMax);
  }
}

void CTrend::RemoveDisplayItems(int iHowMuch /*= -1*/)
{
  int iCount = m_arDisplayItems.GetCount();
  int iUntil = (iHowMuch < 0 || iCount < iHowMuch) ?
               iCount :
               iHowMuch;
               
  for (int i = 0; i < iUntil; i++) {
    delete m_arDisplayItems[i];
    m_arDisplayItems.RemoveAt(i);
  }
}

void CTrend::DrawDisplayItems(CDC* pcDC, const CRect& crBounds, ...)
{
  for (int i = 0; i < m_arDisplayItems.GetCount(); i++) {
    // Check the stamps, indexes, values an draw
    // ...
  }
}

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