ChartDirector 5.1 (.NET Edition)

Soft Bar Shading




This example demonstrates using soft lighting effect for bars and gradient color for plot area background. It also demonstrates putting axis ticks in between axis labels, as opposed to at the axis labels.

Soft lighting is a special shading effect that look like gradient coloring. In this example, soft lighting effect is applied to the bars with the light coming from the left direction.

See Soft Multi-Bar Chart for another example of soft lighting effect with the light coming from the top direction.

Source Code Listing

[ASP.NET - VB Version] NetWebCharts\VBNetASP\softlightbar.aspx
(Click here on how to convert this code to Visual Studio code-behind style.)
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>
<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 bar chart
    Dim data() As Double = {450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700}

    ' The labels for the bar chart
    Dim labels() As String = {"1996", "1997", "1998", "1999", "2000", "2001", _
        "2002", "2003", "2004", "2005"}

    ' Create a XYChart object of size 600 x 360 pixels
    Dim c As XYChart = New XYChart(600, 360)

    ' Add a title to the chart using 18pts Times Bold Italic font
    c.addTitle("Annual Revenue for Star Tech", "Times New Roman Bold Italic", 18)

    ' Set the plotarea at (60, 40) and of size 500 x 280 pixels. Use a vertical
    ' gradient color from light blue (eeeeff) to deep blue (0000cc) as background.
    ' Set border and grid lines to white (ffffff).
    c.setPlotArea(60, 40, 500, 280, c.linearGradientColor(60, 40, 60, 280, _
        &Heeeeff, &H0000cc), -1, &Hffffff, &Hffffff)

    ' Add a multi-color bar chart layer using the supplied data. Use soft lighting
    ' effect with light direction from left.
    c.addBarLayer3(data).setBorderColor(Chart.Transparent, Chart.softLighting( _
        Chart.Left))

    ' Set x axis labels using the given labels
    c.xAxis().setLabels(labels)

    ' Draw the ticks between label positions (instead of at label positions)
    c.xAxis().setTickOffset(0.5)

    ' Add a title to the y axis with 10pts Arial Bold font
    c.yAxis().setTitle("USD (millions)", "Arial Bold", 10)

    ' Set axis label style to 8pts Arial Bold
    c.xAxis().setLabelStyle("Arial Bold", 8)
    c.yAxis().setLabelStyle("Arial Bold", 8)

    ' Set axis line width to 2 pixels
    c.xAxis().setWidth(2)
    c.yAxis().setWidth(2)

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

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _
        "title='Year {xLabel}: US$ {value}M'")

End Sub

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

[ASP.NET - C# Version] NetWebCharts\CSharpASP\softlightbar.aspx
(Click here on how to convert this code to Visual Studio code-behind style.)
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>
<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // The data for the bar chart
    double[] data = {450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700};

    // The labels for the bar chart
    string[] labels = {"1996", "1997", "1998", "1999", "2000", "2001", "2002",
        "2003", "2004", "2005"};

    // Create a XYChart object of size 600 x 360 pixels
    XYChart c = new XYChart(600, 360);

    // Add a title to the chart using 18pts Times Bold Italic font
    c.addTitle("Annual Revenue for Star Tech", "Times New Roman Bold Italic", 18);

    // Set the plotarea at (60, 40) and of size 500 x 280 pixels. Use a vertical
    // gradient color from light blue (eeeeff) to deep blue (0000cc) as background.
    // Set border and grid lines to white (ffffff).
    c.setPlotArea(60, 40, 500, 280, c.linearGradientColor(60, 40, 60, 280, 0xeeeeff,
        0x0000cc), -1, 0xffffff, 0xffffff);

    // Add a multi-color bar chart layer using the supplied data. Use soft lighting
    // effect with light direction from left.
    c.addBarLayer3(data).setBorderColor(Chart.Transparent, Chart.softLighting(
        Chart.Left));

    // Set x axis labels using the given labels
    c.xAxis().setLabels(labels);

    // Draw the ticks between label positions (instead of at label positions)
    c.xAxis().setTickOffset(0.5);

    // Add a title to the y axis with 10pts Arial Bold font
    c.yAxis().setTitle("USD (millions)", "Arial Bold", 10);

    // Set axis label style to 8pts Arial Bold
    c.xAxis().setLabelStyle("Arial Bold", 8);
    c.yAxis().setLabelStyle("Arial Bold", 8);

    // Set axis line width to 2 pixels
    c.xAxis().setWidth(2);
    c.yAxis().setWidth(2);

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

    // Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "",
        "title='Year {xLabel}: US$ {value}M'");
}

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

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

Public Class softlightbar
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Soft Bar Shading"
    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 img is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, img As String) _
        Implements DemoModule.createChart

        ' The data for the bar chart
        Dim data() As Double = {450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, _
            2700}

        ' The labels for the bar chart
        Dim labels() As String = {"1996", "1997", "1998", "1999", "2000", "2001", _
            "2002", "2003", "2004", "2005"}

        ' Create a XYChart object of size 600 x 360 pixels
        Dim c As XYChart = New XYChart(600, 360)

        ' Add a title to the chart using 18pts Times Bold Italic font
        c.addTitle("Annual Revenue for Star Tech", "Times New Roman Bold Italic", _
            18)

        ' Set the plotarea at (60, 40) and of size 500 x 280 pixels. Use a vertical
        ' gradient color from light blue (eeeeff) to deep blue (0000cc) as
        ' background. Set border and grid lines to white (ffffff).
        c.setPlotArea(60, 40, 500, 280, c.linearGradientColor(60, 40, 60, 280, _
            &Heeeeff, &H0000cc), -1, &Hffffff, &Hffffff)

        ' Add a multi-color bar chart layer using the supplied data. Use soft
        ' lighting effect with light direction from left.
        c.addBarLayer3(data).setBorderColor(Chart.Transparent, Chart.softLighting( _
            Chart.Left))

        ' Set x axis labels using the given labels
        c.xAxis().setLabels(labels)

        ' Draw the ticks between label positions (instead of at label positions)
        c.xAxis().setTickOffset(0.5)

        ' Add a title to the y axis with 10pts Arial Bold font
        c.yAxis().setTitle("USD (millions)", "Arial Bold", 10)

        ' Set axis label style to 8pts Arial Bold
        c.xAxis().setLabelStyle("Arial Bold", 8)
        c.yAxis().setLabelStyle("Arial Bold", 8)

        ' Set axis line width to 2 pixels
        c.xAxis().setWidth(2)
        c.yAxis().setWidth(2)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='Year {xLabel}: US$ {value}M'")

    End Sub

End Class

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

namespace CSharpChartExplorer
{
    public class softlightbar : DemoModule
    {
        //Name of demo module
        public string getName() { return "Soft Bar Shading"; }

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

        //Main code for creating chart.
        //Note: the argument img is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, string img)
        {
            // The data for the bar chart
            double[] data = {450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700};

            // The labels for the bar chart
            string[] labels = {"1996", "1997", "1998", "1999", "2000", "2001",
                "2002", "2003", "2004", "2005"};

            // Create a XYChart object of size 600 x 360 pixels
            XYChart c = new XYChart(600, 360);

            // Add a title to the chart using 18pts Times Bold Italic font
            c.addTitle("Annual Revenue for Star Tech", "Times New Roman Bold Italic",
                18);

            // Set the plotarea at (60, 40) and of size 500 x 280 pixels. Use a
            // vertical gradient color from light blue (eeeeff) to deep blue (0000cc)
            // as background. Set border and grid lines to white (ffffff).
            c.setPlotArea(60, 40, 500, 280, c.linearGradientColor(60, 40, 60, 280,
                0xeeeeff, 0x0000cc), -1, 0xffffff, 0xffffff);

            // Add a multi-color bar chart layer using the supplied data. Use soft
            // lighting effect with light direction from left.
            c.addBarLayer3(data).setBorderColor(Chart.Transparent,
                Chart.softLighting(Chart.Left));

            // Set x axis labels using the given labels
            c.xAxis().setLabels(labels);

            // Draw the ticks between label positions (instead of at label positions)
            c.xAxis().setTickOffset(0.5);

            // Add a title to the y axis with 10pts Arial Bold font
            c.yAxis().setTitle("USD (millions)", "Arial Bold", 10);

            // Set axis label style to 8pts Arial Bold
            c.xAxis().setLabelStyle("Arial Bold", 8);
            c.yAxis().setLabelStyle("Arial Bold", 8);

            // Set axis line width to 2 pixels
            c.xAxis().setWidth(2);
            c.yAxis().setWidth(2);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Year {xLabel}: US$ {value}M'");
        }
    }
}