我想向用户列出可供选择的系列列表(可能直接点击图例?)该图表仅显示所选系列
实现这一目标的最佳方法是什么?
我建议你使用代表那些系列的复选框。当用户选中复选框时,您可以将新LineSeries或任何其他系列添加到PlotModel / PlotView。
checkbox1代表series1。 checkbox2代表series2。等等..
例如:
Plotview pv = new PlotView(); // you can also use plotmodel instead of plotview.
pv.Width = 480.0;
pv.Height = 272.0;
pv.Title = graphname;
private void checkbox4_Checked(object sender, RoutedEventArgs e)
{
var LineChart = new LineSeries();
pv.Series.Add(LineChart);
LineChart.DataFieldX = "X";
LineChart.DataFieldY = "Y";
List<Vector> coords = new List<Vector>();
//Add X and Y values to this list. Or you can use any other way you want.
LineChart.ItemsSource = coords; //Feed it to itemsource
LineChart.Title = name;
}
这是我与同事一起找到的MVVM解决方案,允许用户选择要显示的系列:
Firstable我们在xaml中创建一个PlotView,其中ItemsControl绑定在PlotModel.Series上:
<oxy:PlotView Background="Transparent" Model="{Binding PlotModelCompareChart}" x:Name="CompareChart"/>
<Border Grid.Column="1" Margin="0,150,0,0" BorderBrush="Gray" BorderThickness="1" Height="80">
<ItemsControl ItemsSource="{Binding PlotModelCompareChart.Series}" Margin="5" >
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel IsItemsHost="True">
</StackPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="{x:Type oxy:Series}">
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="True" Tag="{Binding ElementName=CompareChart}" >
<i:Interaction.Triggers>
<i:EventTrigger EventName="Checked">
<i:InvokeCommandAction Command="{Binding ElementName=userControl, Path=DataContext.ManageCheckBoxCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=CheckBox}}" ></i:InvokeCommandAction>
</i:EventTrigger>
<i:EventTrigger EventName="Unchecked">
<i:InvokeCommandAction Command="{Binding ElementName=userControl, Path=DataContext.ManageCheckBoxCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=CheckBox}}"></i:InvokeCommandAction>
</i:EventTrigger>
</i:Interaction.Triggers>
</CheckBox>
<Rectangle Width="15" Height="3.5" Margin="5,0,0,0" Fill="{Binding Color, Converter={StaticResource OxyColorToSolidColorBrushConverter}}"/>
<TextBlock Text="{Binding Title}" Margin="5,0,0,0" ></TextBlock>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Border>
转换OxyColor接收转换器填充矩形(你必须设置你的系列的颜色,如果你让Oxyplot选择颜色,它不起作用):
public class OxyColorToSolidColorBrushConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (null == value)
{
return null;
}
if (value is OxyColor)
{
var color = (SolidColorBrush)new BrushConverter().ConvertFrom(value.ToString());
return color;
}
Type type = value.GetType();
throw new InvalidOperationException("Unsupported type [" + type.Name + "]");
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
现在ViewModel中的代码:
--PlotModel Creation -
public PlotModel PlotModelCompareChart => CreatePlotModelForCompareChart(DataPoints);
public PlotModel CreatePlotModelForCompareChart(StripLengthReferentialDataPointCollection points)
{
var plotModel= new PlotModel();
plotModel.IsLegendVisible = false;
var linearAxis = new LinearAxis
{
Position = AxisPosition.Bottom,
MajorGridlineStyle = LineStyle.Solid,
Title = LabelsAndMessagesRes.StripLengthReferentialChart_Legend_HeadPosition,
Unit = PhysicalQuantityManager.Instance.LengthAcronym
};
var linearAxis2 = new LinearAxis
{
Position = AxisPosition.Left,
Title = LabelsAndMessagesRes.Lexicon_Temperature,
Unit = PhysicalQuantityManager.Instance.TemperatureAcronym
};
var linearAxis3 = new LinearAxis
{
Position = AxisPosition.Right,
Maximum = 70,
Key = "ValveAxis"
};
plotModel.Axes.Add(linearAxis);
plotModel.Axes.Add(linearAxis2);
plotModel.Axes.Add(linearAxis3);
var lineSeries = new LineSeries();
lineSeries.Title = LabelsAndMessagesRes.StripLengthReferentialChart_Legend_MeasuredCoilingTemperature;
lineSeries.DataFieldX = "HeadPosition";
lineSeries.DataFieldY = "MeasuredCoilingTemperature";
lineSeries.ItemsSource = points;
lineSeries.Color = OxyColors.Green;
var lineSeries2 = new LineSeries();
lineSeries2.Title = "All valves count";
lineSeries2.DataFieldX = "HeadPosition";
lineSeries2.DataFieldY = "AllValvesCount";
lineSeries2.YAxisKey = "ValveAxis";
lineSeries2.ItemsSource = points;
lineSeries2.Color = OxyColors.LightSeaGreen;
plotModel.Series.Add(lineSeries);
plotModel.Series.Add(lineSeries2);
return plotModel;
}
- 复选框事件的命令和方法(未选中和已检查)
public ICommand ManageCheckBoxCommand { get; private set; }
在Ctor:
ManageCheckBoxCommand = new GalaSoft.MvvmLight.CommandWpf.RelayCommand<object>(ManageCheckBoxMethod);
方法 :
private void ManageCheckBoxMethod(object obj)
{
if(obj != null)
{
var checkbox = obj as CheckBox;
var datacontext = checkbox.DataContext as Series;
datacontext.IsVisible = checkbox.IsChecked.Value;
var plotView = checkbox.Tag as OxyPlot.Wpf.PlotView;
plotView.Model = null;
plotView.Model = datacontext.PlotModel;
}
}
现在的结果是:Options checked
希望能帮助到你 !