ChartDirector 6.0 (ASP/COM/VB Edition)

Bars with Marks




This example demonstrates combine a bar layer with a box-whisker layer to create bars with marks. It also demonstrates gradient background color, rounded frame, soft drop shadow, and automatic resizing of the plot area to fit the chart.

Source Code Listing

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

' The data for the bars and the marks
barData = Array(100, 125, 245, 147, 67, 96, 160, 145, 97, 167, 220, 125)
markData = Array(85, 156, 220, 120, 80, 110, 140, 130, 111, 180, 175, 100)

' The labels for the bar chart
labels = Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec")

' Create a XYChart object of size 480 x 360 pixels. Use a vertical gradient color from pale blue
' (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set border to blue
' (88aaee). Use rounded corners. Enable soft drop shadow.
Set c = cd.XYChart(480, 360)
Call c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, &He8f0f8, &Haaccff), _
    &H88aaee)
Call c.setRoundedFrame()
Call c.setDropShadow()

' Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12 pixels.
Set title = c.addTitle("Bars with Marks Demonstration", "ariali.ttf", 15)
Call title.setMargin2(0, 0, 12, 12)

' Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and to just
' under the title. Set the width to 65 pixels less than the chart width, and the height to reserve
' 90 pixels at the bottom for the x-axis and the legend box. Use pale blue (e8f0f8) background,
' transparent border, and grey (888888) dotted horizontal grid lines.
Call c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight() - _
    90, &He8f0f8, -1, cd.Transparent, c.dashLineColor(&H888888, cd.DotLine))

' Add a legend box where the bottom-center is anchored to the 15 pixels above the bottom-center of
' the chart. Use horizontal layout and 8 points Arial font.
Set legendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 15, False, "arial.ttf", 8)
Call legendBox.setAlignment(cd.BottomCenter)

' Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
Call legendBox.setBackground(&He8f0f8, &H445566)

' Use rounded corners of 5 pixel radius for the legend box
Call legendBox.setRoundedCorners(5)

' Use line style legend key
Call legendBox.setLineStyleKey()

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

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

' Add a box-whisker layer with just the middle mark visible for the marks. Use red (ff0000) color
' for the mark, with a line width of 2 pixels and 10% horizontal gap
Set markLayer = c.addBoxWhiskerLayer(Empty, Empty, Empty, Empty, markData, -1, &Hff0000)
Call markLayer.setLineWidth(2)
Call markLayer.setDataGap(0.1)

' Add the legend key for the mark line
Call legendBox.addKey("Target", &Hff0000, 2)

' Add a blue (0066cc) bar layer using the given data.
Set barLayer = c.addBarLayer(barData, &H0066cc, "Actual")

' Use soft lighting effect for the bars with light direction from left.
Call barLayer.setBorderColor(cd.Transparent, cd.softLighting(cd.Left))

' Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from the
' left edge, just below the title, 15 pixels from the right edge, and 10 pixels above the legend
' box.
Call c.packPlotArea(10, title.getHeight(), c.getWidth() - 15, c.layoutLegend().getTopY() - 10)

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

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

    Dim cd As New ChartDirector.API

    ' The data for the bars and the marks
    Dim barData()
    barData = Array(100, 125, 245, 147, 67, 96, 160, 145, 97, 167, 220, 125)
    Dim markData()
    markData = Array(85, 156, 220, 120, 80, 110, 140, 130, 111, 180, 175, 100)

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

    ' Create a XYChart object of size 480 x 360 pixels. Use a vertical gradient color from pale blue
    ' (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set border to blue
    ' (88aaee). Use rounded corners. Enable soft drop shadow.
    Dim c As XYChart
    Set c = cd.XYChart(480, 360)
    Call c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, &He8f0f8, &Haaccff), _
        &H88aaee)
    Call c.setRoundedFrame()
    Call c.setDropShadow()

    ' Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12
    ' pixels.
    Dim title As ChartDirector.TextBox
    Set title = c.addTitle("Bars with Marks Demonstration", "ariali.ttf", 15)
    Call title.setMargin2(0, 0, 12, 12)

    ' Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and to
    ' just under the title. Set the width to 65 pixels less than the chart width, and the height to
    ' reserve 90 pixels at the bottom for the x-axis and the legend box. Use pale blue (e8f0f8)
    ' background, transparent border, and grey (888888) dotted horizontal grid lines.
    Call c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight() _
         - 90, &He8f0f8, -1, cd.Transparent, c.dashLineColor(&H888888, cd.DotLine))

    ' Add a legend box where the bottom-center is anchored to the 15 pixels above the bottom-center
    ' of the chart. Use horizontal layout and 8 points Arial font.
    Dim legendBox As LegendBox
    Set legendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 15, False, "arial.ttf", 8)
    Call legendBox.setAlignment(cd.BottomCenter)

    ' Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
    Call legendBox.setBackground(&He8f0f8, &H445566)

    ' Use rounded corners of 5 pixel radius for the legend box
    Call legendBox.setRoundedCorners(5)

    ' Use line style legend key
    Call legendBox.setLineStyleKey()

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

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

    ' Add a box-whisker layer with just the middle mark visible for the marks. Use red (ff0000)
    ' color for the mark, with a line width of 2 pixels and 10% horizontal gap
    Dim markLayer As BoxWhiskerLayer
    Set markLayer = c.addBoxWhiskerLayer(Empty, Empty, Empty, Empty, markData, -1, &Hff0000)
    Call markLayer.setLineWidth(2)
    Call markLayer.setDataGap(0.1)

    ' Add the legend key for the mark line
    Call legendBox.addKey("Target", &Hff0000, 2)

    ' Tool tip for the mark layer
    Call markLayer.setHTMLImageMap("", "", "title='Target at {xLabel}: {med}'")

    ' Add a blue (0066cc) bar layer using the given data.
    Dim barLayer As BarLayer
    Set barLayer = c.addBarLayer(barData, &H0066cc, "Actual")

    ' Use soft lighting effect for the bars with light direction from left.
    Call barLayer.setBorderColor(cd.Transparent, cd.softLighting(cd.Left))

    ' Tool tip for the bar layer
    Call barLayer.setHTMLImageMap("", "", "title='{dataSetName} at {xLabel}: {value}'")

    ' Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from
    ' the left edge, just below the title, 15 pixels from the right edge, and 10 pixels above the
    ' legend box.
    Call c.packPlotArea(10, title.getHeight(), c.getWidth() - 15, c.layoutLegend().getTopY() - 10)

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

    ' Include tool tip for the chart
    viewer.ImageMap = c.getHTMLImageMap("clickable")

End Sub