我想从ViewModel调用SciChart控件的ZoomBy()
方法。该ZoomBy()
是容易获得的xaml.cs文件象下面这样:从ViewModel调用SciChart控件的ZoomBy方法
// TODO: Need to implement zoom using MVVM
private void BtnZoomIn_Click(object sender, RoutedEventArgs e)
{
TemperatureGraph.ChartModifier.XAxis.ZoomBy(-0.1, -0.1);
}
同样的功能,我需要使用视图模型模式来实现。
然而,使用SciChart控件的ViewportManager很容易调用ZoomExtents方法。例如。如下:XAML文件
<RocheButton Name="BtnZoomOut" DockPanel.Dock="Top" Icon="{IconResource Icon=ZoomOut}" HorizontalAlignment="Right" Command="{Binding ZoomOutCommand}" />
<s:SciChartSurface x:Name="TemperatureGraph" Grid.Column="0" s:ThemeManager.Theme="BrightSpark"
RenderableSeries="{s:SeriesBinding TemperatureGraphViewModel}" DockPanel.Dock="Bottom"
ViewportManager="{Binding ViewportManager}">
而且视图模型代码:
public class TemperatureSummaryGraphViewModel : ViewModelBase
{
#region Private Members
private IXyDataSeries<TimeSpan, double> TemperatureDataSeries = new XyDataSeries<TimeSpan, double>();
private IXyDataSeries<TimeSpan, double> AcquisitionPointDataSeries = new XyDataSeries<TimeSpan, double>();
private DefaultViewportManager _viewportManager = new DefaultViewportManager();
private ICommand _zoomOutCommand;
#endregion
#region Constructor
public TemperatureSummaryGraphViewModel()
{
ZoomOutCommand = new DelegateCommand(() => ZoomOutTemperatureGrpah());
GenerateDummySeries();
TemperatureGraphViewModel.Add(new LineRenderableSeriesViewModel()
{
DataSeries = TemperatureDataSeries,
StyleKey = "LineSeriesStyle0"
});
TemperatureGraphViewModel.Add(new XyScatterRenderableSeriesViewModel()
{
DataSeries = AcquisitionPointDataSeries,
StyleKey = "ScatterSeriesStyle0"
});
}
#endregion
#region Public Properties
public ObservableCollection<IRenderableSeriesViewModel> TemperatureGraphViewModel { get; } = new ObservableCollection<IRenderableSeriesViewModel>();
public IViewportManager ViewportManager
{
get
{
return _viewportManager;
}
set
{
if (ReferenceEquals(value, _viewportManager))
{
return;
}
_viewportManager = (DefaultViewportManager)value;
OnPropertyChanged("ViewportManager");
}
}
public ICommand ZoomOutCommand
{
get
{
return _zoomOutCommand;
}
set
{
if (ReferenceEquals(value, _zoomOutCommand))
{
return;
}
_zoomOutCommand = value;
OnPropertyChanged(nameof(ZoomOutCommand));
}
}
#endregion
#region Public Methods
/// <summary>
/// To generate dummy data
/// // TODO: Need to integrate it with RunEditor with the actual data
/// </summary>
public void GenerateDummySeries()
{
double y = 80.5, yVar = 30.0;
TemperatureDataSeries.Append(TimeSpan.FromMinutes(1), 40.0);
TemperatureDataSeries.Append(TimeSpan.FromMinutes(2), 80.5);
for (int x = 2; x < 50; x++)
{
TemperatureDataSeries.Append(TimeSpan.FromMinutes(x), y);
yVar *= -1;
y += yVar;
}
for (var i = 5.4; i < 50; i += 2)
{
AcquisitionPointDataSeries.Append(TimeSpan.FromMinutes(i), 60.0);
}
}
public void ZoomOutTemperatureGrpah()
{
_viewportManager.ZoomExtents();
}
#endregion
}
}
此代码工作正常,并缩小了scichart控制到100%。
我想使用ZoomBy()
来实现相同的功能。
请阅读[在什么情况下,我可以添加“紧急”或其他类似的短语到我的问题,以获得更快的答案?](https://meta.stackoverflow.com/q/326569) - 摘要是这不是解决志愿者问题的理想方式,而且可能对获得答案起反作用。请不要将这添加到您的问题。 – halfer
@halfer对不起'紧急'的事情。将在下次照顾。编辑完成。 –