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Bug 1031
| Summary: | PolarChart: Inconsistent data display on ClockWiseLabels | ||
|---|---|---|---|
| Product: | .NET TeeChart | Reporter: | narcís calvet <narcis> |
| Component: | Series | Assignee: | Steema Issue Manager <issuemanager> |
| Status: | RESOLVED FIXED | ||
| Severity: | minor | CC: | chris, daniel.ruetimann |
| Priority: | Normal | ||
| Version: | TeeChart.NET 2014 4.1.2014.02060 | ||
| Target Milestone: | --- | ||
| Hardware: | PC | ||
| OS: | Windows | ||
| URL: | http://www.teechart.net/support/viewtopic.php?f=4&t=15312 | ||
| Chart Series: | Polar | Delphi / C++ Builder RAD IDE Version: | |
| Attachments: | Example showing the two cases described above. | ||
Looking at ClockWiseLabels implementation this can be readily understood:
public bool ClockWiseLabels
{
get { return clockWiseLabels; }
set
{
if (clockWiseLabels != value)
{
clockWiseLabels = value;
ModifyData();
Invalidate();
}
}
}
private void ModifyData()
{
for (int i = 0; i < XValues.Count; i++)
{
XValues[i] = 360 - XValues[i];
}
}
Which is to say that if there is no data in the series, there are no XValues and so no data will be modified. Data has to be first added to the series before it can be modified to make the labels "clockwise".
|
Created attachment 359 [details] Example showing the two cases described above. The label direction on Polar series can be set by the ClockWiseLabels property. I found the following behaviour in TeeChart 4.1.2014.8123: When I set the direction and then add data, the data is drawn at the wrong polar angles. When I add data and then set the direction, the data is drawn as expected. Example: The following code draws data at the wrong positions. E.g. the value "2" is drawn at 270° instead of 90°. private void btnDirectionBeforeData_Click(object sender, EventArgs e) { Polar newSeries = new Polar(); newSeries.CircleLabels = true; newSeries.Color = Color.Red; newSeries.ClockWiseLabels = true; newSeries.Add(0, 10); newSeries.Add(90, 2); newSeries.Add(180, 4); newSeries.Add(270, 8); tChart1.Series.Add(newSeries); } The following code draws data at the correct positions. private void btnDataBeforeDirection_Click(object sender, EventArgs e) { Polar newSeries = new Polar(); newSeries.CircleLabels = true; newSeries.Color = Color.DarkGreen; newSeries.Add(0, 10); newSeries.Add(90, 2); newSeries.Add(180, 4); newSeries.Add(270, 8); newSeries.ClockWiseLabels = true; tChart1.Series.Add(newSeries); } I have attached a sample which demonstrates the behaviour.