ChartDirector 6.0 (ASP/COM/VB Edition)

Glass Bar Shading




This example demonstrates using glass shading effect for bars and gradient color for plot area background. It also demonstrates axis labels on both sides of the plot area.

Glass lighting is a complex shading effect that gives a look and feel of tinted glass or semi-transparent plastic material. This effect involves glare and variation of lighting caused by reflection and refraction inside the material.

Source Code Listing

[Web Version (in ASP)] aspdemo\glasslightbar.asp
<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")

' The data for the bar chart
data = Array(450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700)

' The labels for the bar chart
labels = Array("1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004", "2005")

' Create a XYChart object of size 600 x 360 pixels
Set c = cd.XYChart(600, 360)

' Set the plotarea at (60, 40) and of size 480 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).
Call c.setPlotArea(60, 40, 480, 280, c.linearGradientColor(60, 40, 60, 280, &Heeeeff, &H0000cc), _
    -1, &Hffffff, &Hffffff)

' Add a title to the chart using 18pt Times Bold Italic font
Call c.addTitle("Annual Revenue for Star Tech", "timesbi.ttf", 18)

' Add a multi-color bar chart layer using the supplied data. Use glass lighting effect with light
' direction from the left.
Call c.addBarLayer3(data).setBorderColor(cd.Transparent, cd.glassEffect(cd.NormalGlare, cd.Left))

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

' Show the same scale on the left and right y-axes
Call c.syncYAxis()

' Set the left y-axis and right y-axis title using 10pt Arial Bold font
Call c.yAxis().setTitle("USD (millions)", "arialbd.ttf", 10)
Call c.yAxis2().setTitle("USD (millions)", "arialbd.ttf", 10)

' Set all axes to transparent
Call c.xAxis().setColors(cd.Transparent)
Call c.yAxis().setColors(cd.Transparent)
Call c.yAxis2().setColors(cd.Transparent)

' Set the label styles of all axes to 8pt Arial Bold font
Call c.xAxis().setLabelStyle("arialbd.ttf", 8)
Call c.yAxis().setLabelStyle("arialbd.ttf", 8)
Call c.yAxis2().setLabelStyle("arialbd.ttf", 8)

' Output the chart
Response.ContentType = "image/png"
Response.BinaryWrite c.makeChart2(cd.PNG)
Response.End
%>

[Windows Version (in Visual Basic)] vbdemo\glasslightbar.cls
Public Sub createChart(viewer As Object, chartIndex As Integer)

    Dim cd As New ChartDirector.API

    ' The data for the bar chart
    Dim data()
    data = Array(450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700)

    ' The labels for the bar chart
    Dim labels()
    labels = Array("1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004", "2005")

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

    ' Set the plotarea at (60, 40) and of size 480 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).
    Call c.setPlotArea(60, 40, 480, 280, c.linearGradientColor(60, 40, 60, 280, &Heeeeff, &H0000cc _
        ), -1, &Hffffff, &Hffffff)

    ' Add a title to the chart using 18pt Times Bold Italic font
    Call c.addTitle("Annual Revenue for Star Tech", "timesbi.ttf", 18)

    ' Add a multi-color bar chart layer using the supplied data. Use glass lighting effect with
    ' light direction from the left.
    Call c.addBarLayer3(data).setBorderColor(cd.Transparent, cd.glassEffect(cd.NormalGlare, _
        cd.Left))

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

    ' Show the same scale on the left and right y-axes
    Call c.syncYAxis()

    ' Set the left y-axis and right y-axis title using 10pt Arial Bold font
    Call c.yAxis().setTitle("USD (millions)", "arialbd.ttf", 10)
    Call c.yAxis2().setTitle("USD (millions)", "arialbd.ttf", 10)

    ' Set all axes to transparent
    Call c.xAxis().setColors(cd.Transparent)
    Call c.yAxis().setColors(cd.Transparent)
    Call c.yAxis2().setColors(cd.Transparent)

    ' Set the label styles of all axes to 8pt Arial Bold font
    Call c.xAxis().setLabelStyle("arialbd.ttf", 8)
    Call c.yAxis().setLabelStyle("arialbd.ttf", 8)
    Call c.yAxis2().setLabelStyle("arialbd.ttf", 8)

    ' Output the chart
    Set viewer.Picture = c.makePicture()

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

End Sub