ChartDirector 6.0 (ASP/COM/VB Edition)

Exploded Pie Chart




This example demonstrates a pie chart with all sectors exploded. It also demonstrates many effects, such as gradient color background, rounded frame, soft drop shadow, custom sector colors, sector gradient shading, thick sector border, and using CDML and Parameter Substitution and Formatting to format sector labels.

Source Code Listing

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

' The data for the pie chart
data = Array(21, 18, 15, 12, 8, 24)

' The labels for the pie chart
labels = Array("Labor", "Licenses", "Taxes", "Legal", "Facilities", "Production")

' The colors to use for the sectors
colors = Array(&H66aaee, &Heebb22, &Hbbbbbb, &H8844ff, &Hdd2222, &H009900)

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

' Use the white on black palette, which means the default text and line colors are white
Call c.setColors(cd.whiteOnBlackPalette)

' Use a vertical gradient color from deep blue (000066) to blue (0000cc) as background. Use rounded
' corners of 20 pixels radius. Enable soft drop shadow.
Call c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight(), &H000066, &H0000cc))
Call c.setRoundedFrame(&Hffffff, 20)
Call c.setDropShadow()

' Add a title using 18pt Times New Roman Bold Italic font. Add 16 pixels top margin to the title.
Call c.addTitle("Exploded Pie Chart Demonstration", "timesbi.ttf", 18).setMargin2(0, 0, 16, 0)

' Set the center of the pie at (300, 195) and the radius to 110 pixels
Call c.setPieSize(300, 195, 110)

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

' Set the sector colors
Call c.setColors2(cd.DataColor, colors)

' Use local gradient shading for the sectors, with 5 pixels wide semi-transparent white (bbffffff)
' borders
Call c.setSectorStyle(cd.LocalGradientShading, &Hbbffffff, 5)

' Use the side label layout method
Call c.setLabelLayout(cd.SideLayout)

' Use 10pt Arial Bold as the default label font. Set the label box background color the same as the
' sector color. Use soft lighting effect with light direction from right. Use 8 pixels rounded
' corners.
Set t = c.setLabelStyle("arialbd.ttf", 10, &H000000)
Call t.setBackground(cd.SameAsMainColor, cd.Transparent, cd.softLighting(cd.Right, 0))
Call t.setRoundedCorners(8)

' Set the sector label format. The label is centered in a 110 pixels wide bounding box. It consists
' of two lines. The first line is the sector name. The second line shows the data value and
' percentage.
Call c.setLabelFormat( _
    "<*block,halign=center,width=110*>{label}<*br*><*font=arial.ttf,size=8*>US$ {value}M " & _
    "({percent}%)<*/*>")

' Explode all sectors 10 pixels from the center
Call c.setExplode(-1, 10)

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

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

    Dim cd As New ChartDirector.API

    ' The data for the pie chart
    Dim data()
    data = Array(21, 18, 15, 12, 8, 24)

    ' The labels for the pie chart
    Dim labels()
    labels = Array("Labor", "Licenses", "Taxes", "Legal", "Facilities", "Production")

    ' The colors to use for the sectors
    Dim colors()
    colors = Array(&H66aaee, &Heebb22, &Hbbbbbb, &H8844ff, &Hdd2222, &H009900)

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

    ' Use the white on black palette, which means the default text and line colors are white
    Call c.setColors(cd.whiteOnBlackPalette)

    ' Use a vertical gradient color from deep blue (000066) to blue (0000cc) as background. Use
    ' rounded corners of 20 pixels radius. Enable soft drop shadow.
    Call c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight(), &H000066, &H0000cc))
    Call c.setRoundedFrame(&Hffffff, 20)
    Call c.setDropShadow()

    ' Add a title using 18pt Times New Roman Bold Italic font. Add 16 pixels top margin to the
    ' title.
    Call c.addTitle("Exploded Pie Chart Demonstration", "timesbi.ttf", 18).setMargin2(0, 0, 16, 0)

    ' Set the center of the pie at (300, 195) and the radius to 110 pixels
    Call c.setPieSize(300, 195, 110)

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

    ' Set the sector colors
    Call c.setColors2(cd.DataColor, colors)

    ' Use local gradient shading for the sectors, with 5 pixels wide semi-transparent white
    ' (bbffffff) borders
    Call c.setSectorStyle(cd.LocalGradientShading, &Hbbffffff, 5)

    ' Use the side label layout method
    Call c.setLabelLayout(cd.SideLayout)

    ' Use 10pt Arial Bold as the default label font. Set the label box background color the same as
    ' the sector color. Use soft lighting effect with light direction from right. Use 8 pixels
    ' rounded corners.
    Dim t As ChartDirector.TextBox
    Set t = c.setLabelStyle("arialbd.ttf", 10, &H000000)
    Call t.setBackground(cd.SameAsMainColor, cd.Transparent, cd.softLighting(cd.Right, 0))
    Call t.setRoundedCorners(8)

    ' Set the sector label format. The label is centered in a 110 pixels wide bounding box. It
    ' consists of two lines. The first line is the sector name. The second line shows the data value
    ' and percentage.
    Call c.setLabelFormat( _
        "<*block,halign=center,width=110*>{label}<*br*><*font=arial.ttf,size=8*>US$ {value}M " & _
        "({percent}%)<*/*>")

    ' Explode all sectors 10 pixels from the center
    Call c.setExplode(-1, 10)

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

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

End Sub