ChartDirector 6.2 (.NET Edition)

Circular Zones




This example demonstrates adding circular zones to a polar chart.

In ChartDirector, a zone defined on the radial axis will mark a radius range, and so will appear as ring on a polar chart.

This example contains three circular zones in the plot area background, colored as red, green and blue. The blue region is the original background of the plot area, while the red and green regions are added using Axis.addZone of the radial axis object.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\polarzones.cs
using System;
using ChartDirector;

namespace CSharpChartExplorer
{
    public class polarzones : DemoModule
    {
        //Name of demo module
        public string getName() { return "Circular Zones"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] data = {51, 15, 51, 40, 17, 87, 94, 21, 35, 88, 50, 60};

            // The labels for the chart
            string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept",
                "Oct", "Nov", "Dec"};

            // Create a PolarChart object of size 400 x 420 pixels
            PolarChart c = new PolarChart(400, 420);

            // Set background color to a 2 pixel pattern color, with a black border and 1 pixel 3D
            // border effect
            c.setBackground(c.patternColor(new int[] {0xffffff, 0xe0e0e0}, 2), 0, 1);

            // Add a title to the chart using 16pt Arial Bold Italic font. The title text is white
            // (0xffffff) on 2 pixel pattern background
            c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(
                c.patternColor(new int[] {0x000000, 0x000080}, 2));

            // Set center of plot area at (200, 240) with radius 145 pixels. Set background color to
            // blue (9999ff)
            c.setPlotArea(200, 240, 145, 0x9999ff);

            // Color the region between radius = 40 to 80 as green (99ff99)
            c.radialAxis().addZone(40, 80, 0x99ff99);

            // Color the region with radius > 80 as red (ff9999)
            c.radialAxis().addZone(80, 999, 0xff9999);

            // Set the grid style to circular grid
            c.setGridStyle(false);

            // Set the radial axis label format
            c.radialAxis().setLabelFormat("{value} ppm");

            // Use semi-transparent (40ffffff) label background so as not to block the data
            c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000);

            // Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a
            // black border.
            LegendBox legendBox = c.addLegend(200, 30, false, "Arial Bold", 9);
            legendBox.setAlignment(Chart.TopCenter);

            // Add legend keys to represent the red/green/blue zones
            legendBox.addKey("Under-Absorp", 0x9999ff);
            legendBox.addKey("Normal", 0x99ff99);
            legendBox.addKey("Over-Absorp", 0xff9999);

            // Add a blue (000080) spline line layer with line width set to 3 pixels and using
            // yellow (ffff00) circles to represent the data points
            PolarSplineLineLayer layer = c.addSplineLineLayer(data, 0x000080);
            layer.setLineWidth(3);
            layer.setDataSymbol(Chart.CircleShape, 11, 0xffff00);

            // Set the labels to the angular axis as spokes.
            c.angularAxis().setLabels(labels);

            // Output the chart
            viewer.Chart = c;

            // Include tool tip for the chart.
            viewer.ImageMap = layer.getHTMLImageMap("clickable", "",
                "title='Concentration on {label}: {value} ppm'");
        }
    }
}

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\polarzones.vb
Imports System
Imports Microsoft.VisualBasic
Imports ChartDirector

Public Class polarzones
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Circular Zones"
    End Function

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 1
    End Function

    'Main code for creating chart.
    'Note: the argument chartIndex is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' The data for the chart
        Dim data() As Double = {51, 15, 51, 40, 17, 87, 94, 21, 35, 88, 50, 60}

        ' The labels for the chart
        Dim labels() As String = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", _
            "Oct", "Nov", "Dec"}

        ' Create a PolarChart object of size 400 x 420 pixels
        Dim c As PolarChart = New PolarChart(400, 420)

        ' Set background color to a 2 pixel pattern color, with a black border and 1 pixel 3D border
        ' effect
        c.setBackground(c.patternColor(New Integer() {&Hffffff, &He0e0e0}, 2), 0, 1)

        ' Add a title to the chart using 16pt Arial Bold Italic font. The title text is white
        ' (0xffffff) on 2 pixel pattern background
        c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, &Hffffff).setBackground( _
            c.patternColor(New Integer() {&H000000, &H000080}, 2))

        ' Set center of plot area at (200, 240) with radius 145 pixels. Set background color to blue
        ' (9999ff)
        c.setPlotArea(200, 240, 145, &H9999ff)

        ' Color the region between radius = 40 to 80 as green (99ff99)
        c.radialAxis().addZone(40, 80, &H99ff99)

        ' Color the region with radius > 80 as red (ff9999)
        c.radialAxis().addZone(80, 999, &Hff9999)

        ' Set the grid style to circular grid
        c.setGridStyle(False)

        ' Set the radial axis label format
        c.radialAxis().setLabelFormat("{value} ppm")

        ' Use semi-transparent (40ffffff) label background so as not to block the data
        c.radialAxis().setLabelStyle().setBackground(&H40ffffff, &H40000000)

        ' Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black
        ' border.
        Dim legendBox As LegendBox = c.addLegend(200, 30, False, "Arial Bold", 9)
        legendBox.setAlignment(Chart.TopCenter)

        ' Add legend keys to represent the red/green/blue zones
        legendBox.addKey("Under-Absorp", &H9999ff)
        legendBox.addKey("Normal", &H99ff99)
        legendBox.addKey("Over-Absorp", &Hff9999)

        ' Add a blue (000080) spline line layer with line width set to 3 pixels and using yellow
        ' (ffff00) circles to represent the data points
        Dim layer As PolarSplineLineLayer = c.addSplineLineLayer(data, &H000080)
        layer.setLineWidth(3)
        layer.setDataSymbol(Chart.CircleShape, 11, &Hffff00)

        ' Set the labels to the angular axis as spokes.
        c.angularAxis().setLabels(labels)

        ' Output the chart
        viewer.Chart = c

        ' Include tool tip for the chart.
        viewer.ImageMap = layer.getHTMLImageMap("clickable", "", _
            "title='Concentration on {label}: {value} ppm'")

    End Sub

End Class

[WPF - C#] NetWPFCharts\polarzones.cs
using System;
using ChartDirector;

namespace CSharpWPFDemo
{
    public class polarzones : DemoModule
    {
        //Name of demo module
        public string getName() { return "Circular Zones"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] data = {51, 15, 51, 40, 17, 87, 94, 21, 35, 88, 50, 60};

            // The labels for the chart
            string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept",
                "Oct", "Nov", "Dec"};

            // Create a PolarChart object of size 400 x 420 pixels
            PolarChart c = new PolarChart(400, 420);

            // Set background color to a 2 pixel pattern color, with a black border and 1 pixel 3D
            // border effect
            c.setBackground(c.patternColor(new int[] {0xffffff, 0xe0e0e0}, 2), 0, 1);

            // Add a title to the chart using 16pt Arial Bold Italic font. The title text is white
            // (0xffffff) on 2 pixel pattern background
            c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(
                c.patternColor(new int[] {0x000000, 0x000080}, 2));

            // Set center of plot area at (200, 240) with radius 145 pixels. Set background color to
            // blue (9999ff)
            c.setPlotArea(200, 240, 145, 0x9999ff);

            // Color the region between radius = 40 to 80 as green (99ff99)
            c.radialAxis().addZone(40, 80, 0x99ff99);

            // Color the region with radius > 80 as red (ff9999)
            c.radialAxis().addZone(80, 999, 0xff9999);

            // Set the grid style to circular grid
            c.setGridStyle(false);

            // Set the radial axis label format
            c.radialAxis().setLabelFormat("{value} ppm");

            // Use semi-transparent (40ffffff) label background so as not to block the data
            c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000);

            // Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a
            // black border.
            LegendBox legendBox = c.addLegend(200, 30, false, "Arial Bold", 9);
            legendBox.setAlignment(Chart.TopCenter);

            // Add legend keys to represent the red/green/blue zones
            legendBox.addKey("Under-Absorp", 0x9999ff);
            legendBox.addKey("Normal", 0x99ff99);
            legendBox.addKey("Over-Absorp", 0xff9999);

            // Add a blue (000080) spline line layer with line width set to 3 pixels and using
            // yellow (ffff00) circles to represent the data points
            PolarSplineLineLayer layer = c.addSplineLineLayer(data, 0x000080);
            layer.setLineWidth(3);
            layer.setDataSymbol(Chart.CircleShape, 11, 0xffff00);

            // Set the labels to the angular axis as spokes.
            c.angularAxis().setLabels(labels);

            // Output the chart
            viewer.Chart = c;

            // Include tool tip for the chart.
            viewer.ImageMap = layer.getHTMLImageMap("clickable", "",
                "title='Concentration on {label}: {value} ppm'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\polarzones.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // The data for the chart
    double[] data = {51, 15, 51, 40, 17, 87, 94, 21, 35, 88, 50, 60};

    // The labels for the chart
    string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov",
        "Dec"};

    // Create a PolarChart object of size 400 x 420 pixels
    PolarChart c = new PolarChart(400, 420);

    // Set background color to a 2 pixel pattern color, with a black border and 1 pixel 3D border
    // effect
    c.setBackground(c.patternColor(new int[] {0xffffff, 0xe0e0e0}, 2), 0, 1);

    // Add a title to the chart using 16pt Arial Bold Italic font. The title text is white
    // (0xffffff) on 2 pixel pattern background
    c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(
        c.patternColor(new int[] {0x000000, 0x000080}, 2));

    // Set center of plot area at (200, 240) with radius 145 pixels. Set background color to blue
    // (9999ff)
    c.setPlotArea(200, 240, 145, 0x9999ff);

    // Color the region between radius = 40 to 80 as green (99ff99)
    c.radialAxis().addZone(40, 80, 0x99ff99);

    // Color the region with radius > 80 as red (ff9999)
    c.radialAxis().addZone(80, 999, 0xff9999);

    // Set the grid style to circular grid
    c.setGridStyle(false);

    // Set the radial axis label format
    c.radialAxis().setLabelFormat("{value} ppm");

    // Use semi-transparent (40ffffff) label background so as not to block the data
    c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000);

    // Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black
    // border.
    LegendBox legendBox = c.addLegend(200, 30, false, "Arial Bold", 9);
    legendBox.setAlignment(Chart.TopCenter);

    // Add legend keys to represent the red/green/blue zones
    legendBox.addKey("Under-Absorp", 0x9999ff);
    legendBox.addKey("Normal", 0x99ff99);
    legendBox.addKey("Over-Absorp", 0xff9999);

    // Add a blue (000080) spline line layer with line width set to 3 pixels and using yellow
    // (ffff00) circles to represent the data points
    PolarSplineLineLayer layer = c.addSplineLineLayer(data, 0x000080);
    layer.setLineWidth(3);
    layer.setDataSymbol(Chart.CircleShape, 11, 0xffff00);

    // Set the labels to the angular axis as spokes.
    c.angularAxis().setLabels(labels);

    // Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG);

    // Include tool tip for the chart.
    WebChartViewer1.ImageMap = layer.getHTMLImageMap("", "",
        "title='Concentration on {label}: {value} ppm'");
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\polarzones.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

'
' Page Load event handler
'
Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

    ' The data for the chart
    Dim data() As Double = {51, 15, 51, 40, 17, 87, 94, 21, 35, 88, 50, 60}

    ' The labels for the chart
    Dim labels() As String = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", _
        "Oct", "Nov", "Dec"}

    ' Create a PolarChart object of size 400 x 420 pixels
    Dim c As PolarChart = New PolarChart(400, 420)

    ' Set background color to a 2 pixel pattern color, with a black border and 1 pixel 3D border
    ' effect
    c.setBackground(c.patternColor(New Integer() {&Hffffff, &He0e0e0}, 2), 0, 1)

    ' Add a title to the chart using 16pt Arial Bold Italic font. The title text is white (0xffffff)
    ' on 2 pixel pattern background
    c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, &Hffffff).setBackground( _
        c.patternColor(New Integer() {&H000000, &H000080}, 2))

    ' Set center of plot area at (200, 240) with radius 145 pixels. Set background color to blue
    ' (9999ff)
    c.setPlotArea(200, 240, 145, &H9999ff)

    ' Color the region between radius = 40 to 80 as green (99ff99)
    c.radialAxis().addZone(40, 80, &H99ff99)

    ' Color the region with radius > 80 as red (ff9999)
    c.radialAxis().addZone(80, 999, &Hff9999)

    ' Set the grid style to circular grid
    c.setGridStyle(False)

    ' Set the radial axis label format
    c.radialAxis().setLabelFormat("{value} ppm")

    ' Use semi-transparent (40ffffff) label background so as not to block the data
    c.radialAxis().setLabelStyle().setBackground(&H40ffffff, &H40000000)

    ' Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black
    ' border.
    Dim legendBox As LegendBox = c.addLegend(200, 30, False, "Arial Bold", 9)
    legendBox.setAlignment(Chart.TopCenter)

    ' Add legend keys to represent the red/green/blue zones
    legendBox.addKey("Under-Absorp", &H9999ff)
    legendBox.addKey("Normal", &H99ff99)
    legendBox.addKey("Over-Absorp", &Hff9999)

    ' Add a blue (000080) spline line layer with line width set to 3 pixels and using yellow
    ' (ffff00) circles to represent the data points
    Dim layer As PolarSplineLineLayer = c.addSplineLineLayer(data, &H000080)
    layer.setLineWidth(3)
    layer.setDataSymbol(Chart.CircleShape, 11, &Hffff00)

    ' Set the labels to the angular axis as spokes.
    c.angularAxis().setLabels(labels)

    ' Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG)

    ' Include tool tip for the chart.
    WebChartViewer1.ImageMap = layer.getHTMLImageMap("", "", _
        "title='Concentration on {label}: {value} ppm'")

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\PolarzonesController.cs
using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class PolarzonesController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Circular Zones";
            createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1"));
            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The data for the chart
            double[] data = {51, 15, 51, 40, 17, 87, 94, 21, 35, 88, 50, 60};

            // The labels for the chart
            string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct",
                "Nov", "Dec"};

            // Create a PolarChart object of size 400 x 420 pixels
            PolarChart c = new PolarChart(400, 420);

            // Set background color to a 2 pixel pattern color, with a black border and 1 pixel 3D border
            // effect
            c.setBackground(c.patternColor(new int[] {0xffffff, 0xe0e0e0}, 2), 0, 1);

            // Add a title to the chart using 16pt Arial Bold Italic font. The title text is white
            // (0xffffff) on 2 pixel pattern background
            c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(
                c.patternColor(new int[] {0x000000, 0x000080}, 2));

            // Set center of plot area at (200, 240) with radius 145 pixels. Set background color to blue
            // (9999ff)
            c.setPlotArea(200, 240, 145, 0x9999ff);

            // Color the region between radius = 40 to 80 as green (99ff99)
            c.radialAxis().addZone(40, 80, 0x99ff99);

            // Color the region with radius > 80 as red (ff9999)
            c.radialAxis().addZone(80, 999, 0xff9999);

            // Set the grid style to circular grid
            c.setGridStyle(false);

            // Set the radial axis label format
            c.radialAxis().setLabelFormat("{value} ppm");

            // Use semi-transparent (40ffffff) label background so as not to block the data
            c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000);

            // Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black
            // border.
            LegendBox legendBox = c.addLegend(200, 30, false, "Arial Bold", 9);
            legendBox.setAlignment(Chart.TopCenter);

            // Add legend keys to represent the red/green/blue zones
            legendBox.addKey("Under-Absorp", 0x9999ff);
            legendBox.addKey("Normal", 0x99ff99);
            legendBox.addKey("Over-Absorp", 0xff9999);

            // Add a blue (000080) spline line layer with line width set to 3 pixels and using yellow
            // (ffff00) circles to represent the data points
            PolarSplineLineLayer layer = c.addSplineLineLayer(data, 0x000080);
            layer.setLineWidth(3);
            layer.setDataSymbol(Chart.CircleShape, 11, 0xffff00);

            // Set the labels to the angular axis as spokes.
            c.angularAxis().setLabels(labels);

            // Output the chart
            viewer.Image = c.makeWebImage(Chart.PNG);

            // Include tool tip for the chart.
            viewer.ImageMap = layer.getHTMLImageMap("", "",
                "title='Concentration on {label}: {value} ppm'");
        }
    }
}

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
@{ Layout = null; }

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        @ViewBag.Title
    </div>
    <hr style="border:solid 1px #000080" />
    <div>
        @{
            if (ViewBag.Viewer is Array)
            {
                // Display multiple charts
                for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                {
                    @:@Html.Raw(ViewBag.Viewer[i].RenderHTML())
                }
            }
            else
            {
                // Display one chart only
                @:@Html.Raw(ViewBag.Viewer.RenderHTML())
            }
        }
    </div>
</body>
</html>