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  Setting background color or transparency?
Posted by Chuck on Aug-01-2021 23:51
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Hello Peter,

I am making a .PNG via the {XYChart}.maeChart({filename}) method...

The chart border is being created with a transparent color instead of opaque White as it is displayed using Chart Director.

Can you give me a way to resolve this? Both display white except when displayed on a non-white background (at least this is the case when displaying on my Mac).

Thank you for the help.
Chuck

  Re: Setting background color or transparency?
Posted by Peter Kwan on Aug-02-2021 19:23
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Hi Chuck,

When you create the chart object, you can set its background color. For example, the following chart will have a transparent background and border (note the "New XYChart" line).

' The data for the bar chart
Dim data() As Double = {85, 156, 179.5, 211, 123}

' The labels for the bar chart
Dim labels() As String = {"Mon", "Tue", "Wed", "Thu", "Fri"}

' Create a XYChart object of size 250 x 250 pixels
Dim c As XYChart = New XYChart(250, 250, Chart.Transparent, Chart.Transparent)

' Set the plotarea at (30, 20) and of size 200 x 200 pixels
c.setPlotArea(30, 20, 200, 200)

' Add a bar chart layer using the given data
c.addBarLayer(data)

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

' Output the chart
c.makeChart("c:pathtoaaa.png");

You can also specify the background color using BaseChart.setBackground. See:

https://www.advsofteng.com/doc/cdnet.htm#BaseChart.setBackground.htm

Regards
Peter Kwan