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1 vote
0 answers
10k views

Hello.

In my project, I am trying to display four SciChartSurfaces with a single legend. Furthermore, I want the Visibility changes of each series in the legend checkbox to be reflected in all SciChartSurfaces.

The following code achieves this, but I am not confident that it is the best solution. Is there a more Smart way to accomplish this?

MainWindow.xaml

<Window x:Class="SurveyFleetVisionChartLegend.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="clr-namespace:SurveyFleetVisionChartLegend"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:s="http://schemas.abtsoftware.co.uk/scichart"
    Title="MainWindow"
    Width="800"
    Height="550"
    d:DataContext="{d:DesignInstance {x:Type local:MainWindowViewModel}}"
    mc:Ignorable="d">

<Window.DataContext>
    <local:MainWindowViewModel />
</Window.DataContext>
<Window.Resources>
    <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
</Window.Resources>
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
        <RowDefinition Height="auto" />
    </Grid.RowDefinitions>

    <s:SciChartSurface Grid.Row="0"
                       Margin="5"
                       VerticalAlignment="Stretch"
                       Background="WhiteSmoke"
                       CacheMode="{x:Null}"
                       ChartTitle="SciChartSurface1"
                       RenderableSeries="{s:SeriesBinding GraphSeriess1.Value,
                                                          Mode=OneWay,
                                                          UpdateSourceTrigger=PropertyChanged}">

        <s:SciChartSurface.XAxis>
            <s:NumericAxis DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.XAxis>

        <s:SciChartSurface.YAxis>
            <s:NumericAxis HorizontalContentAlignment="Left"
                           DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.YAxis>
        <s:SciChartSurface.ChartModifier>
            <s:ModifierGroup>
                <s:LegendModifier x:Name="TrendChartLegendModifier"
                                  ShowLegend="False"
                                  Visibility="Visible" />
            </s:ModifierGroup>
        </s:SciChartSurface.ChartModifier>
    </s:SciChartSurface>
    <s:SciChartSurface Grid.Row="1"
                       Margin="5"
                       VerticalAlignment="Stretch"
                       Background="WhiteSmoke"
                       ChartTitle="SciChartSurface2"
                       RenderableSeries="{s:SeriesBinding GraphSeriess2.Value,
                                                          UpdateSourceTrigger=PropertyChanged}">

        <s:SciChartSurface.XAxis>
            <s:NumericAxis DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.XAxis>

        <s:SciChartSurface.YAxis>
            <s:NumericAxis HorizontalContentAlignment="Left"
                           DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.YAxis>
    </s:SciChartSurface>
    <s:SciChartSurface Grid.Row="2"
                       Margin="5"
                       VerticalAlignment="Stretch"
                       Background="WhiteSmoke"
                       ChartTitle="SciChartSurface3"
                       RenderableSeries="{s:SeriesBinding GraphSeriess3.Value}">

        <s:SciChartSurface.XAxis>
            <s:NumericAxis DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.XAxis>

        <s:SciChartSurface.YAxis>
            <s:NumericAxis HorizontalContentAlignment="Left"
                           DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.YAxis>
    </s:SciChartSurface>
    <s:SciChartSurface Grid.Row="3"
                       Margin="5"
                       VerticalAlignment="Stretch"
                       Background="WhiteSmoke"
                       ChartTitle="SciChartSurface4"
                       RenderableSeries="{s:SeriesBinding GraphSeriess4.Value}">

        <s:SciChartSurface.XAxis>
            <s:NumericAxis DrawLabels="False"
                           GrowBy="0.1, 0.1"
                           VisibleRangeLimitMode="MinMax" />
        </s:SciChartSurface.XAxis>

        <s:SciChartSurface.YAxis>
            <s:NumericAxis HorizontalContentAlignment="Left"
                           DrawLabels="False"
                           GrowBy="0.1, 0.1" />
        </s:SciChartSurface.YAxis>
    </s:SciChartSurface>

        <!--  Display the legend for Chart1.  -->
        <!--  Synchronization of Visiblity of each series of each SciChartSurface is performed on the ViwModel side.  -->
        <s:SciChartLegend Grid.Row="4"
                          Grid.Column="1"
                          HorizontalAlignment="Stretch"
                          HorizontalContentAlignment="Center"
                          LegendData="{Binding LegendData,
                                               ElementName=TrendChartLegendModifier}"
                          Orientation="Vertical"
                          ScrollViewer.VerticalScrollBarVisibility="Auto"
                          ShowVisibilityCheckboxes="True" />
    </Grid>
</Window>

MainWindowViewModel.cs

    using Reactive.Bindings;
using Reactive.Bindings.Extensions;
using SciChart.Charting.Common.Extensions;
using SciChart.Charting.Model.ChartData;
using SciChart.Charting.Model.ChartSeries;
using SciChart.Charting.Model.DataSeries;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Reactive.Disposables;
using System.Reactive.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Media;
using System.Xml.Linq;

namespace SurveyFleetVisionChartLegend
{
    public class MainWindowViewModel
    {
        public ReactivePropertySlim<List<IRenderableSeriesViewModel>> GraphSeriess1 { get; set; } = new ReactivePropertySlim<List<IRenderableSeriesViewModel>>();
        public ReactivePropertySlim<List<IRenderableSeriesViewModel>> GraphSeriess2 { get; set; } = new ReactivePropertySlim<List<IRenderableSeriesViewModel>>();
        public ReactivePropertySlim<List<IRenderableSeriesViewModel>> GraphSeriess3 { get; set; } = new ReactivePropertySlim<List<IRenderableSeriesViewModel>>();
        public ReactivePropertySlim<List<IRenderableSeriesViewModel>> GraphSeriess4 { get; set; } = new ReactivePropertySlim<List<IRenderableSeriesViewModel>>();

        public ReactiveCommand RecreateCommand { get; set; }

        private List<string> chartNames;
        private Dictionary<string, bool> seriesVisibles { get; set; }
        private Random random = new Random();

        public MainWindowViewModel()
        {
            chartNames = new List<string>() { "Chart1", "Chart2", "Chart3" };
            seriesVisibles = new Dictionary<string, bool>();
            chartNames.ForEach(a => seriesVisibles.Add(a, true));

            GraphSeriess1.Value = createGraphSeriess("Chart");
            GraphSeriess2.Value = createGraphSeriess("Chart");
            GraphSeriess3.Value = createGraphSeriess("Chart");
            GraphSeriess4.Value = createGraphSeriess("Chart");

            // If the legend changes the Visibility of each series in GraphSeriess1,
            // Vary the Visibility of each series in other GraphSeriess.
            GraphSeriess1.Subscribe(s=> {
                if(s != null)
                    s.ForEach(a =>
                    {
                        a.ObserveProperty(b => b.IsVisible).Subscribe(_ =>
                        {
                            if (GraphSeriess2.Value != null)
                                GraphSeriess2.Value.First(c => c.DataSeries.SeriesName == a.DataSeries.SeriesName).IsVisible = a.IsVisible;
                            if (GraphSeriess3.Value != null)
                                GraphSeriess3.Value.First(c => c.DataSeries.SeriesName == a.DataSeries.SeriesName).IsVisible = a.IsVisible;
                            if (GraphSeriess4.Value != null)
                                GraphSeriess4.Value.First(c => c.DataSeries.SeriesName == a.DataSeries.SeriesName).IsVisible = a.IsVisible;
                            seriesVisibles[a.DataSeries.SeriesName] = a.IsVisible;
                        });
                    });
            });
        }

        private List<IRenderableSeriesViewModel> createGraphSeriess(string name)
        {
            return chartNames.Select((x,a) => createGraphSeries(x, a)).ToList();
        }

        private IRenderableSeriesViewModel createGraphSeries(string name, int index)
        {
            var dataSeries = new XyDataSeries<double>() { SeriesName = name};

            for (var i = 0; i < 5; i++)
            {
                dataSeries.Append(i, random.Next(100));
            }

            return new LineRenderableSeriesViewModel()
            {
                DataSeries = dataSeries,
                IsVisible = seriesVisibles[dataSeries.SeriesName],
                Stroke = Color.FromRgb((byte)(index * 200), (byte)(index * 100), (byte)(index * 100))
            };
        }
    }
}

That is all. Best regards.

1 vote
5k views

Hello, I’m having an issue when I put multiple surfaces in an iOS view. Only the one made first is shown and there is a black space in place of the other. I swapped the order of creation and now the other is visible instead. Does anyone know why this is happening or have suggestions for putting multiple surfaces in an iOS view? Thanks

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