private void LoadView()
{
// Paste your license key here.
mNChartView.Chart.LicenseKey = "";
// Margin to ensure some free space for the iOS status bar.
mNChartView.Chart.CartesianSystem.Margin = new NChartMargin(10.0f, 10.0f, 10.0f, 20.0f);
// We'll use 3D chart.
mNChartView.Chart.DrawIn3D = true;
// Create series that will be displayed on the chart.
NChartSurfaceSeries series = new NChartSurfaceSeries();
// Set data source for the series.
series.DataSource = this;
// Add series to the chart.
mNChartView.Chart.AddSeries(series);
// Create brush scale for series.
// First create an array of solid color brushes with the scale colors.
NChartBrush[] brushes =
{
new NChartSolidColorBrush(Color.Red),
new NChartSolidColorBrush(Color.Yellow),
new NChartSolidColorBrush(Color.Green),
new NChartSolidColorBrush(Color.Cyan)
};
// Then create array of values that will indicate intervals to choose colors. Note, that the rule of getting brush
// from the scale for given value x is:
// if x <= values[0] then choose brush[0]
// else if x > values[i] and x <= values[i + 1] then choose brush[i + 1], i = 0 .. n - 1, n is number of values
// else if x > values[n - 1] then choose brush[n]
// This is why array of brushes should have one more element than array of values.
Number[] values = { (Number)(-0.5), (Number)(0.0), (Number)(0.5) };
// Now create the brush scale itself.
NChartBrushScale scale = new NChartBrushScale(brushes, values);
// If you want smooth color transitions, let this line commented.
// scale.IsGradient = false;
// Assign the scale to the series.
series.Scale = scale;
// You probably want to have a legend on the chart displaying the scale. So create one.
NChartScaleLegend scaleLegend = new NChartScaleLegend(scale);
// Let it be on the left. Feel free to experiment with different locations.
scaleLegend.BlockAlignment = NChartLegendBlockAlignment.Left;
// Let it have a single column.
scaleLegend.ColumnCount = 1;
// Set the delegate for the legend to customize the strings in the entries. Do not assign the delegate if the
// default behavior is ok for you.
scaleLegend.ScaleDelegate = this;
// Add the legend to the chart.
mNChartView.Chart.AddScaleLegend(scaleLegend);
// Update data in the chart.
mNChartView.Chart.UpdateData();
}
public string StringRepresentationOfRange(NSNumber from, NSNumber to, NChartScaleLegend scaleLegend)
{
// Perform a conversion of the values in the legend to string.
// Return null from this method to see the default behavior.
if (from != null && to == null)
{
return(string.Format("more than {0:0.#}", from.DoubleValue));
}
else if (from == null && to != null)
{
return(string.Format("less than {0:0.#}", to.DoubleValue));
}
else
{
return(string.Format("from {0:0.#} to {1:0.#}", from.DoubleValue, to.DoubleValue));
}
}
