ChartDirector 6.2 (.NET Edition)

Donut Width


        

This example demonstrates the effects of different donut widths.

Donut widths are configured by using different inner and outer radii when calling PieChart.setDonutSize.

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class donutwidth : DemoModule
    {
        //Name of demo module
        public string getName() { return "Donut Width"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 5; }

        //Main code for creating charts
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // Determine the donut inner radius (as percentage of outer radius) based on input
            // parameter
            int donutRadius = chartIndex * 25;

            // The data for the pie chart
            double[] data = {10, 10, 10, 10, 10};

            // The labels for the pie chart
            string[] labels = {"Marble", "Wood", "Granite", "Plastic", "Metal"};

            // Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background,
            // black border and 1 pixel 3D border effect
            PieChart c = new PieChart(150, 120, 0xeeeeee, 0x000000, 1);

            // Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is
            // computed according donutWidth
            c.setDonutSize(75, 60, 50, (int)(50 * donutRadius / 100));

            // Add a title to show the donut width
            c.addTitle("Inner Radius = " + donutRadius + " %", "Arial", 10).setBackground(0xcccccc,
                0);

            // Draw the pie in 3D
            c.set3D(12);

            // Set the pie data and the pie labels
            c.setData(data, labels);

            // Disable the sector labels by setting the color to Transparent
            c.setLabelStyle("", 8, Chart.Transparent);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{label}: {value}kg ({percent}%)'");
        }
    }
}

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

Public Class donutwidth
    Implements DemoModule

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

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 5
    End Function

    'Main code for creating charts
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' Determine the donut inner radius (as percentage of outer radius) based on input parameter
        Dim donutRadius As Integer = chartIndex * 25

        ' The data for the pie chart
        Dim data() As Double = {10, 10, 10, 10, 10}

        ' The labels for the pie chart
        Dim labels() As String = {"Marble", "Wood", "Granite", "Plastic", "Metal"}

        ' Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background, black
        ' border and 1 pixel 3D border effect
        Dim c As PieChart = New PieChart(150, 120, &Heeeeee, &H000000, 1)

        ' Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is computed
        ' according donutWidth
        c.setDonutSize(75, 60, 50, Int(50 * donutRadius / 100))

        ' Add a title to show the donut width
        c.addTitle("Inner Radius = " & donutRadius & " %", "Arial", 10).setBackground(&Hcccccc, 0)

        ' Draw the pie in 3D
        c.set3D(12)

        ' Set the pie data and the pie labels
        c.setData(data, labels)

        ' Disable the sector labels by setting the color to Transparent
        c.setLabelStyle("", 8, Chart.Transparent)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='{label}: {value}kg ({percent}%)'")

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class donutwidth : DemoModule
    {
        //Name of demo module
        public string getName() { return "Donut Width"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 5; }

        //Main code for creating charts
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // Determine the donut inner radius (as percentage of outer radius) based on input
            // parameter
            int donutRadius = chartIndex * 25;

            // The data for the pie chart
            double[] data = {10, 10, 10, 10, 10};

            // The labels for the pie chart
            string[] labels = {"Marble", "Wood", "Granite", "Plastic", "Metal"};

            // Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background,
            // black border and 1 pixel 3D border effect
            PieChart c = new PieChart(150, 120, 0xeeeeee, 0x000000, 1);

            // Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is
            // computed according donutWidth
            c.setDonutSize(75, 60, 50, (int)(50 * donutRadius / 100));

            // Add a title to show the donut width
            c.addTitle("Inner Radius = " + donutRadius + " %", "Arial", 10).setBackground(0xcccccc,
                0);

            // Draw the pie in 3D
            c.set3D(12);

            // Set the pie data and the pie labels
            c.setData(data, labels);

            // Disable the sector labels by setting the color to Transparent
            c.setLabelStyle("", 8, Chart.Transparent);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{label}: {value}kg ({percent}%)'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\donutwidth.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">

//
// Create chart
//
protected void createChart(WebChartViewer viewer, int chartIndex)
{
    // Determine the donut inner radius (as percentage of outer radius) based on input parameter
    int donutRadius = chartIndex * 25;

    // The data for the pie chart
    double[] data = {10, 10, 10, 10, 10};

    // The labels for the pie chart
    string[] labels = {"Marble", "Wood", "Granite", "Plastic", "Metal"};

    // Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background, black
    // border and 1 pixel 3D border effect
    PieChart c = new PieChart(150, 120, 0xeeeeee, 0x000000, 1);

    // Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is computed
    // according donutWidth
    c.setDonutSize(75, 60, 50, (int)(50 * donutRadius / 100));

    // Add a title to show the donut width
    c.addTitle("Inner Radius = " + donutRadius + " %", "Arial", 10).setBackground(0xcccccc, 0);

    // Draw the pie in 3D
    c.set3D(12);

    // Set the pie data and the pie labels
    c.setData(data, labels);

    // Disable the sector labels by setting the color to Transparent
    c.setLabelStyle("", 8, Chart.Transparent);

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

    // Include tool tip for the chart
    viewer.ImageMap = c.getHTMLImageMap("", "", "title='{label}: {value}kg ({percent}%)'");
}

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    createChart(WebChartViewer0, 0);
    createChart(WebChartViewer1, 1);
    createChart(WebChartViewer2, 2);
    createChart(WebChartViewer3, 3);
    createChart(WebChartViewer4, 4);
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer0" runat="server" />
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
    <chart:WebChartViewer id="WebChartViewer2" runat="server" />
    <chart:WebChartViewer id="WebChartViewer3" runat="server" />
    <chart:WebChartViewer id="WebChartViewer4" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\donutwidth.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">

'
' Create chart
'
Protected Sub createChart(viewer As WebChartViewer, chartIndex As Integer)

    ' Determine the donut inner radius (as percentage of outer radius) based on input parameter
    Dim donutRadius As Integer = chartIndex * 25

    ' The data for the pie chart
    Dim data() As Double = {10, 10, 10, 10, 10}

    ' The labels for the pie chart
    Dim labels() As String = {"Marble", "Wood", "Granite", "Plastic", "Metal"}

    ' Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background, black
    ' border and 1 pixel 3D border effect
    Dim c As PieChart = New PieChart(150, 120, &Heeeeee, &H000000, 1)

    ' Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is computed
    ' according donutWidth
    c.setDonutSize(75, 60, 50, Int(50 * donutRadius / 100))

    ' Add a title to show the donut width
    c.addTitle("Inner Radius = " & donutRadius & " %", "Arial", 10).setBackground(&Hcccccc, 0)

    ' Draw the pie in 3D
    c.set3D(12)

    ' Set the pie data and the pie labels
    c.setData(data, labels)

    ' Disable the sector labels by setting the color to Transparent
    c.setLabelStyle("", 8, Chart.Transparent)

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

    ' Include tool tip for the chart
    viewer.ImageMap = c.getHTMLImageMap("", "", "title='{label}: {value}kg ({percent}%)'")

End Sub

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

    createChart(WebChartViewer0, 0)
    createChart(WebChartViewer1, 1)
    createChart(WebChartViewer2, 2)
    createChart(WebChartViewer3, 3)
    createChart(WebChartViewer4, 4)

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer0" runat="server" />
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
    <chart:WebChartViewer id="WebChartViewer2" runat="server" />
    <chart:WebChartViewer id="WebChartViewer3" runat="server" />
    <chart:WebChartViewer id="WebChartViewer4" runat="server" />
</body>
</html>

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

namespace NetMvcCharts.Controllers
{
    public class DonutwidthController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Donut Width";

            // This example contains 5 charts.
            ViewBag.Viewer = new RazorChartViewer[5];
            for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                createChart(ViewBag.Viewer[i] = new RazorChartViewer(HttpContext, "chart" + i), i);

            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer, int chartIndex)
        {
            // Determine the donut inner radius (as percentage of outer radius) based on input parameter
            int donutRadius = chartIndex * 25;

            // The data for the pie chart
            double[] data = {10, 10, 10, 10, 10};

            // The labels for the pie chart
            string[] labels = {"Marble", "Wood", "Granite", "Plastic", "Metal"};

            // Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background, black
            // border and 1 pixel 3D border effect
            PieChart c = new PieChart(150, 120, 0xeeeeee, 0x000000, 1);

            // Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is computed
            // according donutWidth
            c.setDonutSize(75, 60, 50, (int)(50 * donutRadius / 100));

            // Add a title to show the donut width
            c.addTitle("Inner Radius = " + donutRadius + " %", "Arial", 10).setBackground(0xcccccc, 0);

            // Draw the pie in 3D
            c.set3D(12);

            // Set the pie data and the pie labels
            c.setData(data, labels);

            // Disable the sector labels by setting the color to Transparent
            c.setLabelStyle("", 8, Chart.Transparent);

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

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "", "title='{label}: {value}kg ({percent}%)'");
        }
    }
}

[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>