C# 从ViewModel类调用SciChart控件的ZoomBy方法
我正在尝试从ViewModel调用SciChart控件的C# 从ViewModel类调用SciChart控件的ZoomBy方法,c#,wpf,xaml,mvvm,scichart,C#,Wpf,Xaml,Mvvm,Scichart,我正在尝试从ViewModel调用SciChart控件的ZoomBy()方法。ZoomBy()在xaml.cs文件中很容易找到,如下所示: // TODO: Need to implement zoom using MVVM private void BtnZoomIn_Click(object sender, RoutedEventArgs e) { TemperatureGraph.ChartModifier.XAxis.ZoomBy(-0.1, -0.1)
ZoomBy()
方法。ZoomBy()
在xaml.cs文件中很容易找到,如下所示:
// TODO: Need to implement zoom using MVVM
private void BtnZoomIn_Click(object sender, RoutedEventArgs e)
{
TemperatureGraph.ChartModifier.XAxis.ZoomBy(-0.1, -0.1);
}
我需要使用ViewModel模式实现相同的功能
但是,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}">
和ViewModel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
}
}
public类TemperatureSummaryGraphViewModel:ViewModelBase
{
#区域私人成员
私有IXyDataSeries TemperatureDataSeries=新的XyDataSeries();
私有IXyDataSeries AcquisitionPointDataSeries=新的XyDataSeries();
私有DefaultViewportManager _viewportManager=新建DefaultViewportManager();
私有IComand(u zoomOutCommand);;
#端区
#区域构造函数
公共温度汇总图视图模型()
{
ZoomOutCommand=newdelegatecommand(()=>ZoomOutTemperatureGrpah());
GenerateDummySeries();
TemperatureGraphViewModel.Add(新的LineRenderableSeriesViewModel()
{
数据系列=温度数据系列,
StyleKey=“LineSeriesStyle0”
});
TemperatureGraphViewModel.Add(新的XyScatterRenderableSeriesViewModel()
{
DataSeries=AcquisitionPointDataSeries,
StyleKey=“ScatterSeriesStyle0”
});
}
#端区
#区域公共财产
public ObservableCollection TemperatureGraphViewModel{get;}=new ObservableCollection();
公共IViewportManager视口管理器
{
得到
{
return\u viewportManager;
}
设置
{
if(ReferenceEquals(值,_viewportManager))
{
返回;
}
_viewportManager=(DefaultViewportManager)值;
OnPropertyChanged(“ViewportManager”);
}
}
公共ICOMAND ZoomOutCommand
{
得到
{
返回zoomOutCommand;
}
设置
{
if(ReferenceEquals(值,_zoomOutCommand))
{
返回;
}
_zoomOutCommand=值;
OnPropertyChanged(名称(ZoomOutCommand));
}
}
#端区
#区域公共方法
///
///生成虚拟数据的步骤
/////TODO:需要将其与RunEditor与实际数据集成
///
public void GenerateDummySeries()
{
双y=80.5,yVar=30.0;
TemperatureDataSeries.Append(TimeSpan.FromMinutes(1),40.0);
TemperatureDataSeries.Append(TimeSpan.FromMinutes(2),80.5);
对于(int x=2;x<50;x++)
{
TemperatureDataSeries.Append(TimeSpan.FromMinutes(x),y);
yVar*=-1;
y+=yVar;
}
对于(变量i=5.4;i<50;i+=2)
{
AcquisitionPointDataSeries.Append(TimeSpan.FromMinutes(i),60.0);
}
}
公共空间ZoomOutTemperatureGrpah()
{
_viewportManager.ZoomExtents();
}
#端区
}
}
这段代码运行良好,并将scichart控件缩小到100%
我想使用ZoomBy()
实现相同的方法,因为这些方法只存在于和派生类中,从ViewModel触发这些方法的唯一方法是将Axis实例实际传递到ViewModel中
这不是真正的MVVM,但可以认为是一种解决方法:将轴作为IAxis传递给ViewModel并直接控制它
唯一的其他方法是编写一个行为,或,它侦听来自ViewModel的事件并直接控制轴
这是首选方法。如果搜索“”,您将看到在ViewModel上引发事件并在视图中处理的方法 请阅读-总结是,这不是一个理想的方式来解决志愿者,可能会适得其反获得答案。请不要将此添加到您的问题中。@halfer对“紧急”事件表示抱歉。下一次我会小心的。编辑完成了。