public override void Initialize()
{
base.Initialize();
// Create title label
NLabel title = new NLabel("Pie Data Point Anchor");
title.TextStyle.FontStyle = new NFontStyle("Times New Roman", 18, FontStyle.Italic);
// Create a pie chart
NPieChart chart = new NPieChart();
chart.Enable3D = false;
// Create a pie series with 6 data points
NPieSeries pieSeries = new NPieSeries();
chart.Series.Add(pieSeries);
pieSeries.DataLabelStyle.Visible = true;
pieSeries.LabelMode = PieLabelMode.SpiderNoOverlap;
GenerateData(pieSeries);
// Create a rounded rect callout
NRoundedRectangularCallout callout = new NRoundedRectangularCallout();
callout.ArrowLength = new NLength(20, NGraphicsUnit.Point);
callout.FillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.White), Color.FromArgb(125, Color.LightGreen));
callout.UseAutomaticSize = true;
callout.Orientation = 80;
callout.ContentAlignment = ContentAlignment.TopLeft;
callout.Text = "Annotation";
callout.TextStyle.FontStyle.EmSize = new NLength(8);
// Anchor the callout to pie data point #0
NPieDataPointAnchor anchor = new NPieDataPointAnchor(pieSeries, 0, 0.8f, StringAlignment.Near);
callout.Anchor = anchor;
// add title and chart panels
ConfigureStandardLayout(chart, title, null);
// add the annotation panel
nChartControl1.Panels.Add(callout);
// apply style sheet
NStyleSheet styleSheet = NStyleSheet.CreatePredefinedStyleSheet(PredefinedStyleSheet.FreshMultiColor);
styleSheet.Apply(nChartControl1.Document);
// init form controla
DataPointIndexUpDown.Value = anchor.DataPointIndex;
AnchorPositionUpDown.Value = (decimal)anchor.RadialPosition;
}
protected void Page_Load(object sender, EventArgs e)
{
nChartControl1.BackgroundStyle.FrameStyle.Visible = false;
nChartControl1.Panels.Clear();
// Create title label
NLabel title = new NLabel("Pie Data Point Anchor");
title.TextStyle.FontStyle = new NFontStyle("Times New Roman", 18, FontStyle.Italic);
title.TextStyle.FontStyle = new NFontStyle("Times New Roman", 14, FontStyle.Italic);
title.TextStyle.ShadowStyle.Type = ShadowType.LinearBlur;
nChartControl1.Panels.Add(title);
// Create a pie chart
NPieChart chart = new NPieChart();
nChartControl1.Panels.Add(chart);
chart.Enable3D = false;
// Create a pie series with 6 data points
NPieSeries pieSeries = new NPieSeries();
chart.Series.Add(pieSeries);
pieSeries.DataLabelStyle.Visible = true;
pieSeries.LabelMode = PieLabelMode.SpiderNoOverlap;
pieSeries.Values.FillRandomRange(new Random(), 6, 1, 5);
// Create a rounded rect callout
NRoundedRectangularCallout callout = new NRoundedRectangularCallout();
callout.ArrowLength = new NLength(20, NGraphicsUnit.Point);
callout.FillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.White), Color.FromArgb(125, Color.LightGreen));
callout.UseAutomaticSize = true;
callout.Orientation = 80;
callout.ContentAlignment = ContentAlignment.TopLeft;
callout.Text = "Annotation";
callout.TextStyle.FontStyle.EmSize = new NLength(8);
// Anchor the callout to pie data point #0
NPieDataPointAnchor anchor = new NPieDataPointAnchor(pieSeries, 0, 0.8f, StringAlignment.Near);
callout.Anchor = anchor;
// add the annotation panel
nChartControl1.Panels.Add(callout);
// apply style sheet
NStyleSheet styleSheet = NStyleSheet.CreatePredefinedStyleSheet(PredefinedStyleSheet.BrightMultiColor);
styleSheet.Apply(nChartControl1.Document);
}
private void AnchorPositionUpDown_ValueChanged(object sender, EventArgs e)
{
if (nChartControl1 == null)
{
return;
}
NRoundedRectangularCallout callout = nChartControl1.Panels[2] as NRoundedRectangularCallout;
if (callout == null)
{
return;
}
NPieDataPointAnchor anchor = callout.Anchor as NPieDataPointAnchor;
if (anchor == null)
{
return;
}
anchor.RadialPosition = (float)AnchorPositionUpDown.Value;
nChartControl1.Refresh();
}
private void DataPointIndexUpDown_ValueChanged(object sender, EventArgs e)
{
if (nChartControl1 == null)
{
return;
}
NRoundedRectangularCallout callout = nChartControl1.Panels[2] as NRoundedRectangularCallout;
if (callout == null)
{
return;
}
NPieDataPointAnchor anchor = callout.Anchor as NPieDataPointAnchor;
if (anchor == null)
{
return;
}
anchor.DataPointIndex = (int)DataPointIndexUpDown.Value;
nChartControl1.Refresh();
}
