Checkbox problem on Radhart

[Muhammad]

I have used RadChart for displaying graph, On legend i have used chekboxes for each item. upon which the respective series will be show/hide.On opening the form the data is loaded and legend items are checked by default. The problem is that when i unchecked the items and then scroll the chart or zoom in the checboxes are automatically checked, although the series are hidden as i have already uncheck the items.Why the checkboxes are automatically got checked on zooming or scrolling.I want the checkboxes to remain unchecked

User control class

public partial class UserControl1 : UserControl
    {
        DataSeries lineSeries;
        SeriesMapping seriesMapping;
        SeriesDefinition seriesDefinition;
        vm objvm;
        List<Data> vitalSign;
        List<CheckBox> VSChk;
        public Dictionary<object, bool?> chkbxState;

        public UserControl1()
        {
            InitializeComponent();
            radChart1.DefaultView.ChartArea.AxisX.LayoutMode = AxisLayoutMode.Between;
            radChart1.DefaultView.ChartArea.AxisX.AxisLabelsVisibility = Visibility.Hidden;
            //radChart1.DefaultView.ChartArea.AxisX.LabelRotationAngle = 45;
            radChart1.DefaultView.ChartArea.ZoomScrollSettingsX.ScrollMode = ScrollMode.ScrollAndZoom;
            radChart1.DefaultView.ChartArea.ZoomScrollSettingsX.MinZoomRange = 0.2;
            radChart1.DefaultView.ChartLegend.UseAutoGeneratedItems = true;


        }

        public void initViewModel()
        {
            objvm = ((vm)this.FindResource("ViewModel"));
            vitalSign = new List<Data>();
        }
        public void addData(string XValue, string YValue, string VSCode, string EncounterDate)
        {
            vitalSign.Add(new Data(DateTime.Parse(XValue), double.Parse(YValue), VSCode, DateTime.Parse(EncounterDate)));
        }
        public void setSeriesMapping()
        {
           // List<Data> vs;
            try
            {
                var v1 = (from c1 in vitalSign
                          select new { itemCode = c1.vsCode }).Distinct().ToList();

                foreach (var item in v1)
                {
                   // vs = new List<Data>();
                    seriesMapping = new SeriesMapping();
                    seriesDefinition = new LineSeriesDefinition();
                    seriesDefinition.ShowItemToolTips = true;
                    seriesMapping.LegendLabel = item.itemCode;
                    seriesMapping.SeriesDefinition = seriesDefinition;
                    seriesMapping.SeriesDefinition.Visibility = SeriesVisibility.Visible;

                    var v2 = from c2 in vitalSign
                             where c2.vsCode == item.itemCode
                             select c2;

                    seriesMapping.ItemMappings.Add(new ItemMapping("encounterDate", DataPointMember.XCategory));
                    seriesMapping.ItemMappings.Add(new ItemMapping("Y", DataPointMember.YValue));
                    seriesMapping.ItemMappings.Add(new ItemMapping("toolTip", DataPointMember.Tooltip));

                    /*foreach (var vitalsign in v2)
                    {
                        vs.Add(new Data(vitalsign.X, vitalsign.Y, vitalsign.vsCode, vitalsign.encounterDate));
                    }
                     */
                    objvm._mapping.Add(seriesMapping.LegendLabel, seriesMapping);
                   // seriesMapping.ItemsSource = vs;
                    seriesMapping.ItemsSource = v2.ToList();
                    radChart1.SeriesMappings.Add(seriesMapping);
                }

            }
            catch (Exception ex)
            {

            }
        }
        public void setData(string controlname)
        {
            // not use now
            try
            {
                seriesMapping = new SeriesMapping();
                seriesDefinition = new LineSeriesDefinition();
                seriesDefinition.ShowItemToolTips = true;
                seriesMapping.LegendLabel = controlname;
                seriesMapping.SeriesDefinition = seriesDefinition;
                seriesMapping.SeriesDefinition.Visibility = SeriesVisibility.Visible;
               // seriesMapping.ItemMappings.Add(new ItemMapping("X", DataPointMember.XValue));
                seriesMapping.ItemMappings.Add(new ItemMapping("X", DataPointMember.XCategory));
                seriesMapping.ItemMappings.Add(new ItemMapping("Y", DataPointMember.YValue));
                seriesMapping.ItemMappings.Add(new ItemMapping("toolTip", DataPointMember.Tooltip));

                seriesMapping.ItemsSource = this.vitalSign;

                objvm._mapping.Add(seriesMapping.LegendLabel, seriesMapping);
                radChart1.SeriesMappings.Add(seriesMapping);
            }
            catch  (Exception ex)
            {

            }
        }
        public void setDataLineSeries()
        {
            try
            {
                var v7 = (from c7 in vitalSign
                          select new { itemCode = c7.vsCode }).Distinct().ToList();

                foreach (var item in v7)
                {
                    lineSeries = new DataSeries();
                    lineSeries.Definition = new LineSeriesDefinition();
                    lineSeries.Definition.ShowItemToolTips = true;
                    lineSeries.LegendLabel = item.itemCode;

                    var v8 = from c8 in vitalSign
                             where c8.vsCode == item.itemCode
                             select c8;

                    foreach (var vitalsign in v8)
                    {
                        lineSeries.Add(new DataPoint() { XCategory = vitalsign.encounterDate.ToString("g"), YValue = vitalsign.Y, Tooltip = vitalsign.toolTip });
                    }
                   // objvm._series.Add(lineSeries.LegendLabel, lineSeries);
                    radChart1.DefaultView.ChartArea.DataSeries.Add(lineSeries);

                }
            }
            catch (Exception ex)
            {

            }
        }
        private void RadChart1_Loaded(object sender, RoutedEventArgs e)
        {
           /* List<CheckBox> checkBoxes = radChart1.DefaultView.ChartLegend.ChildrenOfType<CheckBox>().ToList<CheckBox>();
            if (checkBoxes.Count > 0)
            {
                checkBoxes[0].IsEnabled = false;
            }
            //       SetSeriesItemStyle();
            */
        }
        public void getchkbxControl()
        {
            VSChk = new List<CheckBox>();
            var mapping = radChart1.SeriesMappings;
            try
            {
                for (int i = 0; i < mapping.Count; i++)
                {
                    ChartLegendItem legendItem = (radChart1.DefaultView.ChartLegend as System.Windows.Controls.ItemsControl).Items[i] as ChartLegendItem;
                    CheckBox checkBox = legendItem.ChildrenOfType<CheckBox>().FirstOrDefault();
                    VSChk.Add(checkBox);
                }
            }
            catch (Exception ex)
            {

            }
        }

        private void AxisX_RangeChanged(object sender, EventArgs e)
        {
            try
            {
                if (VSChk != null)
                {
                    foreach (var item in VSChk)
                    {
                        item.IsChecked = chkbxState[item.Content].Value;
                    }
                }
            }
            catch (Exception ex)
            { }
        }

        private void CheckBox_Checked(object sender, RoutedEventArgs e)
        {
            chkbxState = new Dictionary<object, bool?>();
            foreach (var item in VSChk)
            {
                chkbxState.Add(item.Content, item.IsChecked);
            }
        }

        private void ChartArea_Loaded(object sender, RoutedEventArgs e)
        {

        }

        private void post_Unchecked(object sender, RoutedEventArgs e)
        {
            chkbxState = new Dictionary<object, bool?>();
            foreach (var item in VSChk)
            {
                chkbxState.Add(item.Content, item.IsChecked);
            }
        }
    }

   

here is the XAML code

<UserControl x:Class="HMVitalSignGraph.UserControl1"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:example="clr-namespace:HMVitalSignGraph"
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
             mc:Ignorable="d"
             d:DesignHeight="300" d:DesignWidth="500">

    <UserControl.Resources>
        <example:vm x:Key="ViewModel" />
        <Style x:Key="SeriesItemLabelStyle"
        TargetType="telerik:SeriesItemLabel">
            <Setter Property="HorizontalContentAlignment"
            Value="Center" />
            <Setter Property="Padding"
            Value="2,0" />
            <Setter Property="Foreground"
            Value="Black" />
            <Setter Property="FontWeight"
            Value="Bold" />
            <Setter Property="FontFamily"
            Value="Trebuchet MS" />
            <Setter Property="FontSize"
            Value="12" />
        </Style>

        <Style x:Key="CustomLegendItemStyle" TargetType="telerik:ChartLegendItem">
            <Setter Property="Template" >
                <Setter.Value>

                    <ControlTemplate TargetType="telerik:ChartLegendItem">
                        <Grid x:Name="PART_MainContainer" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="0,0,5,0">
                            <Path x:Name="PART_LegendItemMarker"
                                  Height="20"
                                  Width="150"
                                  Style="{TemplateBinding ItemStyle}"
                                  Stretch="UniformToFill">
                                <Path.Data>
                                    <PathGeometry x:Name="PART_ItemMarkerGeometry" />
                                </Path.Data>
                            </Path>

                            <CheckBox x:Name="post" IsChecked="True"
                                      Foreground="Black"
                                      VerticalAlignment="Center"
                                      Margin="2,0"
                                      Content="{TemplateBinding Label}"
                                      Background="{TemplateBinding Background}"
                                      Command="{Binding Path=ChangeSeriesVisibilityCommand, Source={StaticResource ViewModel}}"
                                      CommandParameter="{TemplateBinding Label}" Checked="CheckBox_Checked" Unchecked="post_Unchecked" />
                        </Grid>

                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </UserControl.Resources>
    <Canvas x:Name="canv" Background="#edf7ff">
        <Grid Width="{Binding ActualWidth, ElementName=canv}"  Height="{Binding ActualHeight, ElementName=canv}" MinWidth="1">
            <telerik:RadChart Name="radChart1" DataContext="{Binding}"  HorizontalAlignment="Left" telerik:StyleManager.Theme="Windows7" Loaded="RadChart1_Loaded"  VerticalAlignment="Top" >
                <telerik:RadChart.DefaultView>
                    <telerik:ChartDefaultView  ChartLegendPosition="Right">
                        <!--<telerik:ChartDefaultView.ChartTitle>
                        <telerik:ChartTitle>CDC growth chart</telerik:ChartTitle>
                    </telerik:ChartDefaultView.ChartTitle>-->
                        <telerik:ChartDefaultView.ChartLegend>
                            <telerik:ChartLegend x:Name="PrimaryLegend" Header="Click on vital signs to hide/show:" LegendItemMarkerShape="Square" LegendItemStyle="{StaticResource CustomLegendItemStyle}"  />
                        </telerik:ChartDefaultView.ChartLegend>
                        <telerik:ChartDefaultView.ChartArea >
                            <telerik:ChartArea  SmartLabelsEnabled="True" EnableAnimations="False" Padding="5,10,20,5" LabelFormatBehavior="HumanReadable"    LegendName="PrimaryLegend" FontSize="10" Loaded="ChartArea_Loaded" >
                                <telerik:ChartArea.AxisX>
                                    <telerik:AxisX  RangeChanged="AxisX_RangeChanged"  />
                                </telerik:ChartArea.AxisX>
                                <!--<telerik:ChartArea.AxisY>
                                    <telerik:AxisY ExtendDirection="None"  />
                                </telerik:ChartArea.AxisY>-->
                            </telerik:ChartArea>
                        </telerik:ChartDefaultView.ChartArea>
                    </telerik:ChartDefaultView>
                </telerik:RadChart.DefaultView>
            </telerik:RadChart>
        </Grid>
    </Canvas>
</UserControl>

View model class

class vm : ViewModelBase
    {
        public Dictionary<string, SeriesMapping> _mapping = new Dictionary<string, SeriesMapping>();
        //public Dictionary<string, DataSeries> _series = new Dictionary<string, DataSeries>();
        private ICommand _changeSeriesVisibilityCommand;

        public SeriesMapping this[string name]
        {
            get
            {
                return _mapping[name];
            }
            set
            {
                _mapping[name] = value;
            }
        }
       /* public DataSeries this[string name]
        {
            get
            {
                return _series[name];
            }
            set
            {
                _series[name] = value;
            }
        }
        */
        public vm()
        {
            this.WireCommands();
        }
        public void WireCommands()
        {
            this.ChangeSeriesVisibilityCommand = new DelegateCommand(this.ChangeSeriesVisibility);
        }
        public ICommand ChangeSeriesVisibilityCommand
        {
            get
            {
                return this._changeSeriesVisibilityCommand;
            }
            private set
            {
                this._changeSeriesVisibilityCommand = value;
            }
        }
        public void ChangeSeriesVisibility(object parameter)
        {
            try
            {
                string parm = parameter.ToString();

                if (this._mapping[parm].SeriesDefinition.Visibility == SeriesVisibility.Collapsed || this._mapping[parm].SeriesDefinition.Visibility == SeriesVisibility.Hidden)
                    this._mapping[parm].SeriesDefinition.Visibility = SeriesVisibility.Visible;
                else
                    this._mapping[parm].SeriesDefinition.Visibility = SeriesVisibility.Hidden;

               /* if (this._series[parm].Definition.Visibility == SeriesVisibility.Collapsed || this._series[parm].Definition.Visibility == SeriesVisibility.Hidden)
                    this._series[parm].Definition.Visibility = SeriesVisibility.Visible;
                else
                    this._series[parm].Definition.Visibility = SeriesVisibility.Hidden;
                */
            }
            catch (Exception ex)
            {

                throw;
            }
        }
    }

WPF application class

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            userControl11.initViewModel();
            userControl11.addData(DateTime.Now.ToString("g"), "10", "Diasystolic blood pressure", DateTime.Now.ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(2).ToString("g"), "20", "Diasystolic blood pressure", DateTime.Now.ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(4).ToString("g"), "30", "Diasystolic blood pressure", DateTime.Now.AddDays(2).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(6).ToString(), "40", "Diasystolic blood pressure", DateTime.Now.AddDays(2).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(8).ToString(), "50", "Diasystolic blood pressure", DateTime.Now.AddDays(2).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(10).ToString(), "60", "Diasystolic blood pressure", DateTime.Now.AddDays(4).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(11).ToString(), "70", "Diasystolic blood pressure", DateTime.Now.AddDays(4).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(12).ToString(), "80", "Diasystolic blood pressure", DateTime.Now.AddDays(6).ToString("g"));

            userControl11.addData(DateTime.Now.AddDays(1).ToString(), "10", "Pulse rate", DateTime.Now.AddDays(1).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(3).ToString(), "60", "Pulse rate", DateTime.Now.AddDays(1).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(5).ToString(), "90", "Pulse rate", DateTime.Now.AddDays(3).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(7).ToString(), "20", "Pulse rate", DateTime.Now.AddDays(3).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(9).ToString(), "110", "Pulse rate", DateTime.Now.AddDays(5).ToString("g"));

            userControl11.addData(DateTime.Now.AddDays(1).ToString(), "5", "rate", DateTime.Now.ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(3).ToString(), "15", "rate", DateTime.Now.AddDays(1).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(5).ToString(), "25", "rate", DateTime.Now.AddDays(5).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(7).ToString(), "35", "rate", DateTime.Now.AddDays(5).ToString("g"));
            userControl11.addData(DateTime.Now.AddDays(9).ToString(), "45", "rate", DateTime.Now.AddDays(7).ToString("g"));

            userControl11.setSeriesMapping();

        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            userControl11.getchkbxControl();
        }