public CustomerCategorySalesChartView()
{
#region chart series
PieSeries pieSeries = new PieSeries()
{
ExplodeAll = true,
ConnectorLineType = ConnectorLineType.Bezier,
DataMarkerPosition = CircularSeriesDataMarkerPosition.OutsideExtended,
DataMarker = new ChartDataMarker()
{
LabelStyle = new DataMarkerLabelStyle()
{
Margin = new Thickness(5),
LabelFormat = "$0.00"
}
},
ColorModel = new ChartColorModel()
{
Palette = ChartColorPalette.Custom,
CustomBrushes = new List <Color>()
{
Palette._014,
Palette._015,
Palette._016
}
}
};
pieSeries.SetBinding(ChartSeries.ItemsSourceProperty, "CategorySalesChartDataPoints");
#endregion
#region chart
SfChart chart = new SfChart()
{
HeightRequest = ChartHeight,
Legend = new ChartLegend()
{
DockPosition = LegendPlacement.Top
},
//BackgroundColor = Color.Transparent
};
chart.Legend.LabelStyle.TextColor = LegendLabelColor;
chart.SetBinding(IsEnabledProperty, "IsBusy", converter: new InverseBooleanConverter());
chart.SetBinding(IsVisibleProperty, "IsBusy", converter: new InverseBooleanConverter());
chart.Series.Add(pieSeries);
#endregion
#region platform adjustments
Device.OnPlatform(
Android: () =>
{
Font androidChartLabelFont = Font.SystemFontOfSize(Device.GetNamedSize(NamedSize.Large, typeof(Label)) * 1.5);
pieSeries.DataMarker.LabelStyle.Font = androidChartLabelFont;
});
#endregion
Content = chart;
}
private void btnGrabar_Clicked(object sender, EventArgs e)
{
var series = new PieSeries();
series.SetBinding(PieSeries.ItemsSourceProperty, new Binding("Data"));
series.ValueBinding = new PropertyNameDataPointBinding("Value");
chart.Series.Add(series);
try
{
SendData(DateTime.Now.ToString(), DateTime.Now.Minute.ToString());
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
private void AddFileToChart(FileItemViewModel viewModel)
{
var mapper = new PieMapper <FileItemViewModel>().Value(f => f.Megabytes);
var series = new PieSeries(mapper);
series.Title = viewModel.Name;
series.Visibility = viewModel.ChartVisibility;
series.Values = new ChartValues <FileItemViewModel>()
{
viewModel
};
series.DataContext = viewModel;
series.SetBinding(PieSeries.VisibilityProperty, FileItemViewModel.ChartVisibilityPropertyName);
this.PieChart.Series.Add(series);
foreach (var child in viewModel.Children)
{
this.AddFileToChart(child);
}
}
private static PieSeries ProvidePieSeries(PropertyInfo propertyInfo, string dependentValuePath,
string independentValuePath)
{
var series = new PieSeries();
series.SetBinding(DataPointSeries.ItemsSourceProperty, propertyInfo.GetBinding());
series.IndependentValuePath = independentValuePath;
series.DependentValuePath = dependentValuePath;
series.Unloaded += (o, e) =>
{
var control = o as PieSeries;
if (control == null)
{
return;
}
BindingOperations.ClearAllBindings(control);
};
return(series);
}
private View CreateChart()
{
var container = new StackLayout();
// >> chart-features-piechart-legend-definition-cs
var chart = new RadPieChart
{
BindingContext = new ViewModel(),
HeightRequest = 300
};
// >> chart-features-piechart-legendtitlebinding-cs
var series = new PieSeries
{
ValueBinding = new PropertyNameDataPointBinding("Value"),
DisplayName = "Value",
LegendTitleBinding = new PropertyNameDataPointBinding("Category")
};
// << chart-features-piechart-legendtitlebinding-cs
series.SetBinding(ChartSeries.ItemsSourceProperty, new Binding("Data1"));
chart.Series.Add(series);
var legend = new RadLegend
{
LegendProvider = chart,
HeightRequest = 200,
LegendItemFontColor = Color.DarkGreen,
LegendItemFontSize = 20
};
// << chart-features-piechart-legend-definition-cs
container.Children.Add(chart);
container.Children.Add(legend);
return(container);
}
private void GenPieChart(Dictionary <string, int> pieChartData)
{
PART_PieChartControl.Series.Clear();
var sum = pieChartData.Values.Sum();
var pointLabelBinding = new Binding(nameof(PointLabel))
{
Source = this
};
foreach (var key in pieChartData.Keys)
{
// Calculate proportion
var proportion = pieChartData[key] / (double)sum;
var proportionText = $"{proportion * 100 :F1}%";
var series = new PieSeries()
{
Title = key, Values = new ChartValues <int>(new[] { pieChartData[key] }), ToolTip = proportionText, DataLabels = true
};
series.SetBinding(PointLabelProperty, pointLabelBinding);
PART_PieChartControl.Series.Add(series);
}
}
