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 Multichart & addMark |
| Posted by Fabian on Sep-19-2011 17:50 |
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Hello Peter,
how could be used addMark for a multichart?
With this code the markline won't be appear:
m = new MultiChart(iWindowX, iWindowY);
c = (XYChart*)
DrawChartLine(true, m_iVStartIndex, 180, iHGab+10, iWindowX, iHeight+iHGab);
// Add a red (ff0000) dash line to represent the current day
COleDateTime dtToday = COleDateTime::GetCurrentTime();
Mark* pMark = c->yAxis()->addMark(chartTime(dtToday.GetYear(),dtToday.GetMonth(), dtToday.GetDay()),c->dashLineColor(0xff0000, Chart::DashLine));
pMark->setLineWidth(2);
pMark->setText("<*font=arialbi.ttf,size=9,color=FF0000*>Heute");
pMark->setDrawOnTop(true);
pArr.Add(c);
m->addChart(0, 0, c);
for(i=1; i<m_iMinV; i++) {
c = (XYChart*)DrawChartLine(false, i+m_iVStartIndex, 180, 3, iWindowX, iHeight);
pArr.Add(c);
m->addChart(0, iHeight*i+iHGab, c);
}
delete m_Chart.getChart(); // delete old Multichart!!!
m_Chart.setChart(m);
//include tool tip for the chart
CString sImageMap;
sImageMap.Format("%s", m->getHTMLImageMap("", ""));
// "index={field0}", "title='{x|dd.mm.yyyy}\\n{field1}\\n{value} Stunden'"));
m_Chart.setImageMap(sImageMap);
for(i=0;i<pArr.GetSize();i++) delete (XYChart*)pArr.GetAt(i); |
| Re: Multichart & addMark |
| Posted by Peter Kwan on Sep-20-2011 00:54 |
|
Hi Fabian,
You can use addMark on an XYChart as usual. The XYChart can be included in a MultiChart.
Whereas I cannot find any error in your code, there is an "unusual feature". Your code adds the mark line to the y-axis, in which the mark value is a date. Is this correct, or should the mark line be added to the x-axis? (In most charts with dates, the x-axis is the date axis, while the y-axis is the numeric axis.)
Also, as you are using a date value as the mark line, it works only if your axis is really a date/time axis. It means your code must be using setXData to provide date/time x-coordinates to the layer, and your axis is not using setLabels (otherwise it is a label based axis, not a date/time axis). Since I do not know what is inside DrawChartLine, I cannot verify if the above is the case.
Regards
Peter Kwan |
| Re: Multichart & addMark |
| Posted by Fabian on Sep-20-2011 01:14 |
|
Hi Peter,
thank you. My mistake, I should use xAxis. Now it's working!  |
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