Applying a Brush to a ScatterPointSeries I create at runtime

[Robert]

Hi,

I'm creating a ScatterPointSeries at runtime and have had no problem adding it to my ChartView. I want to do this multiple times though so I want to apply a different brush to each.

ScatterPointSeries sps = new ScatterPointSeries();

brush = Brushes.Red; // This will be dynamic

sps.ItemsSource = source;

sps.XValueBinding = new PropertyNameDataPointBinding() { PropertyName = XPath };

sps.YValueBinding = new GenericDataPointBinding<T, float>() { ValueSelector = Function };

Chart.Series.Add(sps);

How can I apply the brush to the ScatterPointSeries points? I've experimented with a datatemplate, but this will only let me style all the scatterpoints to use the same brush.

Thanks,

Rob

[Robert]

I was hoping for something along the lines of a Stroke property which is exposed by other series like ScatterLineSeries.

[Martin Ivanov]

Hello Robert,

There are several ways to achieve your requirement. You could change the color of the series by using any of our Palettes. Here is an example how you could set a palette in code: 

this.Chart.Palette = ChartPalettes.Windows8;

Another option would be to create a custom palette where you could define your colors. Here is an example in code:

var customPalette = new ChartPalette();
var entryCollection = new PaletteEntryCollection
{
    new PaletteEntry(Brushes.DarkOliveGreen),
    new PaletteEntry(Brushes.DarkOrange),
    new PaletteEntry(Brushes.DarkTurquoise),
    new PaletteEntry(Brushes.LightGoldenrodYellow),
};
entryCollection.SeriesFamily = "Point";
customPalette.SeriesEntries.Add(entryCollection);

Chart.Palette = customPalette;

You could also set the DefaultVisualStyle property of the series:

ScatterPointSeries sps = new ScatterPointSeries();

Brush brush = Brushes.Red;
Style style = new Style(typeof(Path));
style.Setters.Add(new Setter(Path.FillProperty, brush));

sps.DefaultVisualStyle = style;

Also please note that it is better to create the style in XAML instead of in code behind.

I attached a sample project with the last mentioned approach.

Regards,
Martin
Telerik