private void GroupValues_Click(object sender, System.EventArgs e)
{
if (m_bGroupedData)
{
MessageBox.Show("Click the ungroup button first");
return;
}
// get a subset containing the pies which are smaller than the specified value
NDataSeriesSubset smallerThanValue = m_Pie.Values.Filter(Nevron.Chart.CompareMethod.Less, m_dGroupValue);
// determine the sum of the filtered pies
double dOtherSliceValue = m_Pie.Values.Evaluate("SUM", smallerThanValue);
// remove the data points contained in the
for (int i = m_Pie.GetDataPointCount(); i >= 0; i--)
{
if (smallerThanValue.Contains(i))
{
m_Pie.RemoveDataPointAt(i);
}
}
// add a detached pie with the specified group label and color
NDataPoint dp = new NDataPoint(dOtherSliceValue, m_sGroupLabel);
dp[DataPointValue.PieDetachment] = 2;
dp[DataPointValue.FillStyle] = new NColorFillStyle(m_GroupColor);
dp[DataPointValue.StrokeStyle] = new NStrokeStyle(1, m_GroupColor);
m_Pie.AddDataPoint(dp);
m_bGroupedData = true;
nChartControl1.Refresh();
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
WebExamplesUtilities.FillComboWithColorNames(GroupedPieColorDropDownList);
GroupedPieColorDropDownList.SelectedIndex = 20;
// init form controls
ThresholdValueTextBox.Text = "34";
GroupedPieLabelTextBox.Text = "Other";
}
nChartControl1.BackgroundStyle.FrameStyle.Visible = false;
nChartControl1.Settings.JitterMode = JitterMode.Enabled;
// set a chart title
NLabel title = nChartControl1.Labels.AddHeader("Grouped Pie Chart");
title.TextStyle.FontStyle = new NFontStyle("Times New Roman", 14, FontStyle.Italic);
title.TextStyle.ShadowStyle.Type = ShadowType.LinearBlur;
title.ContentAlignment = ContentAlignment.BottomRight;
title.Location = new NPointL(
new NLength(2, NRelativeUnit.ParentPercentage),
new NLength(2, NRelativeUnit.ParentPercentage));
// setup legend
NLegend legend = nChartControl1.Legends[0];
legend.OuterBottomBorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
legend.OuterLeftBorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
legend.OuterRightBorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
legend.OuterTopBorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
legend.FillStyle.SetTransparencyPercent(70);
legend.HorizontalBorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
legend.VerticalBorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
// by default the control contains a Cartesian chart -> remove it and create a Pie chart
NChart chart = new NPieChart();
nChartControl1.Charts.Clear();
nChartControl1.Charts.Add(chart);
chart.Enable3D = true;
chart.DisplayOnLegend = nChartControl1.Legends[0];
chart.Projection.SetPredefinedProjection(PredefinedProjection.PerspectiveElevated);
chart.BoundsMode = BoundsMode.Fit;
chart.Location = new NPointL(
new NLength(20, NRelativeUnit.ParentPercentage),
new NLength(20, NRelativeUnit.ParentPercentage));
chart.Size = new NSizeL(
new NLength(60, NRelativeUnit.ParentPercentage),
new NLength(60, NRelativeUnit.ParentPercentage));
// setup pie series
NPieSeries pie = (NPieSeries)chart.Series.Add(SeriesType.Pie);
pie.Legend.Mode = SeriesLegendMode.None;
pie.PieStyle = PieStyle.SmoothEdgePie;
int count = 10;
pie.Values.FillRandomRange(Random, count, 1, 100);
for (int i = 0; i < count; i++)
{
pie.Detachments.Add(0);
pie.Labels.Add(arrLabels[i]);
pie.FillStyles[i] = arrCustomColors2[i % arrCustomColors2.Length];
}
if (GroupPiesCheckBox.Checked == true)
{
try
{
Color groupColor = WebExamplesUtilities.ColorFromDropDownList(GroupedPieColorDropDownList);
double dGroupValue = Int32.Parse(ThresholdValueTextBox.Text);
// get a subset containing the pies which are smaller than the specified value
NDataSeriesSubset smallerThanValue = pie.Values.Filter(Nevron.Chart.CompareMethod.Less, dGroupValue);
// determine the sum of the filtered pies
double dOtherSliceValue = pie.Values.Evaluate("SUM", smallerThanValue);
// remove the data points contained in the
for (int i = pie.GetDataPointCount(); i >= 0; i--)
{
if (smallerThanValue.Contains(i))
{
pie.RemoveDataPointAt(i);
}
}
// add a detached pie with the specified group label and color
NDataPoint dp = new NDataPoint(dOtherSliceValue, GroupedPieLabelTextBox.Text);
dp[DataPointValue.PieDetachment] = 1.0;
dp[DataPointValue.FillStyle] = new NColorFillStyle(groupColor);
dp[DataPointValue.StrokeStyle] = new NStrokeStyle(1, groupColor);
pie.AddDataPoint(dp);
}
catch
{
}
}
else
{
}
}
