using System;
using Nevron.Chart;
using Nevron.Chart.ThinWeb;
using Nevron.GraphicsCore;
using Nevron.ThinWeb;

namespace WebApplication1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!NThinChartControl1.Initialized)
            {
                // enable jittering (full scene antialiasing)
                NThinChartControl1.Settings.JitterMode = JitterMode.Enabled;
                NThinChartControl1.BackgroundStyle.FrameStyle.Visible = false;

                // by default the control contains a Cartesian chart -> remove it and create a Pie chart
                NChart chart = new NPieChart();
                NThinChartControl1.Charts.Clear();
                NThinChartControl1.Charts.Add(chart);

                // configure the chart
                chart.Enable3D = true;
                chart.LightModel.SetPredefinedLightModel(PredefinedLightModel.MetallicLustre);
                chart.Projection.SetPredefinedProjection(PredefinedProjection.OrthogonalElevated);

                // add a pie serires
                NPieSeries pie = (NPieSeries)chart.Series.Add(SeriesType.Pie);
                pie.PieStyle = PieStyle.SmoothEdgePie;
                pie.PieEdgePercent = 50;
                pie.DataLabelStyle.Visible = false;

                pie.AddDataPoint(new NDataPoint(0, "Ships"));
                pie.AddDataPoint(new NDataPoint(0, "Trains"));
                pie.AddDataPoint(new NDataPoint(0, "Cars"));
                pie.AddDataPoint(new NDataPoint(0, "Buses"));
                pie.AddDataPoint(new NDataPoint(0, "Airplanes"));

                pie.Values.FillRandomRange(new Random(), pie.Values.Count, 1, 20);
                for (int i = 0; i < pie.Values.Count; i++)
                {
                    pie.Detachments.Add(0);
                }

                // apply style sheet
                NStyleSheet styleSheet = NStyleSheet.CreatePredefinedStyleSheet(PredefinedStyleSheet.NevronMultiColor);
                styleSheet.Apply(NThinChartControl1.Document);

                // configure the controller
                NServerMouseEventTool serverMouseEventTool = new NServerMouseEventTool();
                serverMouseEventTool.MouseDown = new NDetachPieSliceMouseEventCallback();
                NThinChartControl1.Controller.Tools.Add(serverMouseEventTool);
            }
        }

        [Serializable]
        class NDetachPieSliceMouseEventCallback : INMouseEventCallback
        {
            #region INMouseEventCallback Members

            public void OnMouseEvent(NAspNetThinWebControl control, NBrowserMouseEventArgs e)
            {
                NThinChartControl chartControl = (NThinChartControl)control;

                NPieChart pieChart = (NPieChart)chartControl.Charts[0];
                NHitTestResult hitTestResult = chartControl.HitTest(e.X, e.Y);

                int dataPointIndex = hitTestResult.DataPointIndex;

                // collapse all pie slices
                NPieSeries pieSeries = (NPieSeries)pieChart.Series[0];
                for (int i = 0; i < pieSeries.Values.Count; i++)
                {
                    pieSeries.Detachments[i] = 0;
                }

                // expand the one that's hit
                if (dataPointIndex != -1)
                {
                    pieSeries.Detachments[dataPointIndex] = 5.0f;
                }

                chartControl.UpdateView();
            }

            #endregion
        }
    }
}