public override void RangeChanged(SFDateTimeRangeNavigator rangeNavigator, NSDate startDate, NSDate endDate)
{
NSDateFormatter resultFormatter = new NSDateFormatter();
resultFormatter.DateFormat = "MMM dd";
lblTitle.Text = string.Format(@"Data usage cycle: {0} - {1}",
resultFormatter.ToString(startDate),
resultFormatter.ToString(endDate));
NSDateFormatter dateFormatter = new NSDateFormatter();
dateFormatter.DateFormat = @"MMM dd";
ChartDataModel data = new ChartDataModel();
NSDate date;
NSNumber value;
int y = 0;
for (int i = 0; i < dataPoints.Count; i++)
{
data = dataPoints[i];
date = (CustomizationRangeNavigator.DateTimeToNSDate((DateTime)data.XValue));
if ((startDate.Compare(date) == NSComparisonResult.Ascending || startDate.Compare(date) == NSComparisonResult.Same) &&
(date.Compare(endDate) == NSComparisonResult.Ascending || date.Compare(endDate) == NSComparisonResult.Same))
{
value = (NSNumber)data.YValue;
y += (int)value;
}
}
lblValue.Text = string.Format(@"Data usage - {0} MB", y);
}
void Chart_LegendItemCreated(object sender, ChartLegendItemCreatedEventArgs e)
{
ChartDataModel dataModel = e.LegendItem.DataPoint as ChartDataModel;
float heightAndWidth = Utility.IsIPad ? 80 : 60;
UIView legendView = new UIView();
legendView.Frame = new CGRect(0, 0, 130, heightAndWidth - 10);
SFChart legendChart = new SFChart();
legendChart.Frame = new CGRect(0, 0, heightAndWidth, heightAndWidth);
UIImageView imageView = new UIImageView();
imageView.Image = UIImage.FromBundle(dataModel.Image);
imageView.Frame = new CGRect(legendChart.Frame.X / 2, legendChart.Frame.Y / 2, Utility.IsIPad ? 30 : 20, Utility.IsIPad ? 30 : 20);
SFDoughnutSeries series = new SFDoughnutSeries();
series.IsStackedDoughnut = true;
series.Color = e.LegendItem.IconColor;
series.ItemsSource = new List <ChartDataModel>()
{
dataModel
};
series.XBindingPath = "XValue";
series.YBindingPath = "YValue";
series.StartAngle = -90;
series.EndAngle = 270;
series.MaximumValue = 100;
series.Spacing = 0.2;
series.DoughnutCoefficient = 0.8;
series.CircularCoefficient = 1.0;
series.CapStyle = DoughnutCapStyle.BothCurve;
series.CenterView = imageView;
legendChart.Series.Add(series);
legendView.AddSubview(legendChart);
UILabel yLabel = new UILabel();
yLabel.Frame = new CGRect(Utility.IsIPad ? 77 : 57, Utility.IsIPad ? 20 : 10, 80, 18);
yLabel.TextColor = e.LegendItem.IconColor;
yLabel.Font = UIFont.FromName("Helvetica", 14f);
yLabel.Text = dataModel.YValue.ToString() + "%";
UILabel xLabel = new UILabel();
xLabel.Frame = new CGRect(Utility.IsIPad ? 77 : 57, Utility.IsIPad ? 40 : 30, 80, 18);
xLabel.TextColor = UIColor.Black;
xLabel.Font = UIFont.FromName("Helvetica", 12f);
xLabel.Text = dataModel.XValue.ToString();
legendView.AddSubview(yLabel);
legendView.AddSubview(xLabel);
e.LegendItem.View = legendView;
}
async void UpdateData()
{
await Task.Delay(50);
if (!isDispose)
{
ChartDataModel datapoint = dataModel.dataPointWithTimeInterval(0.13);
(chart.Series[0].ItemsSource as ObservableCollection <ChartDataModel>).Add(new ChartDataModel(datapoint.XValue, datapoint.YValue));
if (dataModel.verticalCount < 340)
{
UpdateData();
}
}
}