/// <summary>
/// read the data buff and timestamp buff start from buff tail
///
/// </summary>
/// <param name="data_name"></param>
/// <param name="point_id"></param>
/// <returns></returns>
private ChartLineDataInfo getDataBuffFromTail(string data_name, int point_id)
{
ChartLineDataInfo info = new ChartLineDataInfo();
info = mainform.monitorData[data_name, point_id].readDecodedValueBuff(1);
return(info);
}
/// <summary>
/// read the data buff and timestamp buff
/// array[0]: value, array[1]: timestamp
/// </summary>
/// <param name="len"></param>
/// <returns></returns>
public ChartLineDataInfo readDecodedValueBuff(int len)
{
ChartLineDataInfo info;
if (this.tail > 0)
{
info = new ChartLineDataInfo((double)time_stamp_buff[this.tail - 1], (double)value_buff[this.tail - 1]);
//info = new ChartLineDataInfo((double)value_buff[this.tail - 1], (double)time_stamp_buff[this.tail - 1]);
}
else
{
info = new ChartLineDataInfo();
}
int cnt = 0;
while (this.head != this.tail && cnt < len)
{
if (this.tail < 0)
{
break;
}
info.YValueDataValue = (double)value_buff[this.tail];
info.XValueTimeStamp = (double)time_stamp_buff[this.tail] / 1000; // us -> ms
this.tail += 1;
cnt += 1;
if (this.tail >= MAX_BUFF_LEN)
{
this.tail = 0;
}
}
return(info);
}
/// The AddNewPoint function is called for each series in the chart when
/// new points need to be added. The new point will be placed at specified
/// X axis (Date/Time) position with a Y value in a range +/- 1 from the previous
/// data point's Y value, and not smaller than zero.
public void AddNewPoint(DateTime timeStamp, Series ptSeries, int chart_ind, int area_ind, int add_data_times_cnt)
{
int time_length = 120; // unit: seconds
double[] data = new double[2];
double[] data_value;
int cnt = chart[chart_ind].ChartAreas.Count;
ChartLineDataInfo lineDataInfo = new ChartLineDataInfo();
ChartLineDataInfo lineData = new ChartLineDataInfo();
DateTime time_tmp = DateTime.Now;
for (int i = 0; i < 1; i++)
{
// including point_id and the date type(s0, s1, etc..)
//string[] name_str = chart[chart_ind].Titles[area_ind].Text.Split('-'); // 1-S0, 5-S1 6-U1 etc.
lineDataInfo.setDataInfo(chart[chart_ind].Titles[area_ind].Text);
int buff_cnt = 0;
double time_offset;
double data_time_interval = this.chart_update_interval / this.add_num_amount;
int tail = mainform.monitorData[lineDataInfo.DataName, lineDataInfo.DataPointID].tail;
int head = mainform.monitorData[lineDataInfo.DataName, lineDataInfo.DataPointID].head;
data_value = getDataBuffFromTail(lineDataInfo.DataName, lineDataInfo.DataPointID, add_num_amount);
while (mainform.monitorData.tail != mainform.monitorData.head && buff_cnt < add_num_amount)
{
//lineDataInfo.getDataInfo(chart[chart_ind].Titles[area_ind].Text);
//if (lineDataInfo.DataName != "")
{
/*
* // get data from buff
* if (buff_cnt == 0)
* mainform.monitorData[lineDataInfo.DataName, lineDataInfo.DataPointID].tail = mainform.monitorData[lineDataInfo.DataName, lineDataInfo.DataPointID].head - add_num_amount;
*
* lineData = getDataBuffFromTail(lineDataInfo.DataName, lineDataInfo.DataPointID);
*
* time_offset = (double)(-data_time_interval) * (add_num_amount - buff_cnt - 1); // ms
* time_tmp = timeStamp.AddMilliseconds(time_offset);
* ptSeries.Points.AddXY(time_tmp.ToOADate(), lineData.YValueDataValue);
*/
time_offset = (double)(-data_time_interval) * (add_num_amount - buff_cnt - 1); // ms
time_tmp = timeStamp.AddMilliseconds(time_offset);
ptSeries.Points.AddXY(time_tmp.ToOADate(), data_value[buff_cnt]);
/*
* lineData.YValueDataValue = mainform.monitorData.getDecodedValue(lineDataInfo.DataName, lineDataInfo.DataPointID);
* ptSeries.Points.AddXY(timeStamp.ToOADate(), lineData.YValueDataValue);
*/
mainform.monitorData.tail += 1;
buff_cnt += 1;
}
}
// Add new data point to its series.
//ptSeries.Points.AddXY(timeStamp.ToOADate(), rand.Next(5, 20));
//ptSeries.Points.AddXY(mainform.DateTimeStamp.AddMilliseconds(data[1]).ToOADate(), data[0]);
if (add_data_times_cnt >= 0)
{
// remove all points from the source series older than 1.5 minutes.
double removeBefore = timeStamp.AddSeconds((double)(time_length) * (-1.2)).ToOADate();
//remove oldest values to maintain a constant number of data points
if (ptSeries.Points.Count > 0)
{
while (ptSeries.Points[0].XValue < removeBefore)
{
if (ptSeries.Points.Count > 1)
{
ptSeries.Points.RemoveAt(0);
}
else
{
break;
}
}
}
//chart[ind].ChartAreas[i].AxisX.Minimum = ptSeries.Points[0].XValue;
//chart[ind].ChartAreas[i].AxisX.Maximum = DateTime.FromOADate(ptSeries.Points[0].XValue).AddSeconds((double)time_length).ToOADate();
chart[chart_ind].ChartAreas[area_ind].AxisX.Minimum = timeStamp.AddSeconds((double)(time_length) * (-1)).ToOADate();
chart[chart_ind].ChartAreas[area_ind].AxisX.Maximum = timeStamp.ToOADate();
//chart[chart_ind].Invalidate();
}
}
// redraw chart[i]
//chart[chart_ind].Invalidate();
}