如何在C#Mapsui中使用两个EditingWidgets。同时进行WPF?

我目前正在尝试使用Wpf的C#Mapsui库在地图上绘制多边形和直线。目标是,当我单击“DrawPolygon”按钮时,我可以绘制多边形,而当单击“DrawLines”按钮时也可以绘制线。当一个绘图模式处于活动状态并且单击另一个按钮时,应禁用第一个按钮。为了实现这一点,“绘制”按钮是单选按钮,并且相应的小工具始终具有与按钮的IsChecked属性相同的启用状态。

所以我可以让它工作,但我确实遇到了一些更棘手的问题。我提出了两种不同的方法,每种方法都有缺点。

1. 在加载XAML时调用的启动函数中初始化EditManager和Widget时。

当它们在启动时创建时,我想禁用它们,这样如果我不想的话,我就不会意外地在地图上绘制 似乎永久残疾。因为在ButtonClick()上,它们再次启用,但我什么都画不出来。这很烦人,我不想使用我的另一个选项(见下文),即如果小部件已经存在,我会对每个按钮点击()调用test。这似乎是不必要的,并导致另一个问题(见下文)

  public void LoadModelData(object sender, RoutedEventArgs e)
  {
      DataContext = ViewModel;

      // mapsui load new MapControl to XAML-Tag and add OpenStreetMap
      // then add it to Content of ContentControl-Tag
      mapControl = new Mapsui.UI.Wpf.MapControl();
      mapControl.Map?.Layers.Add(Mapsui.Tiling.OpenStreetMap.CreateTileLayer());
      MapContainer.Content = mapControl;
      mapControl.Map.Widgets.Add(new MapInfoWidget(mapControl.Map)); // should always be first widget
      mapControl.Map.Layers.Add(ViewModel.PolygonLayer, ViewModel.LineLayer);

      mapControl.Info += MapControlOnInfo;
      mapControl.MouseMove += MapControlOnMouseMove;

      
      ViewModel.LineEditManager = new EditManager
      {
          Layer = (WritableLayer)mapControl.Map.Layers.First(l => l.Name == "Line"),
          EditMode = EditMode.AddLine,
      };
      IWidget widget = new EditingWidget(mapControl, ViewModel.LineEditManager, new EditManipulation());
      mapControl.Map.Widgets.Add(widget);
      ViewModel.LineWidgetIndex = mapControl.Map.Widgets.ToList().IndexOf(widget);
// Especially here seems to be the problem
      mapControl.Map.Widgets.ElementAt(ViewModel.LineWidgetIndex).Enabled = false;

      ViewModel.BBoxEditManager = new EditManager
      {
          Layer = (WritableLayer)mapControl.Map.Layers.First(l => l.Name == "Polygon"),
          EditMode = EditMode.AddPolygon,
      };
      widget = new EditingWidget(mapControl, ViewModel.BBoxEditManager, new EditManipulation());
      mapControl.Map.Widgets.Add(widget);
      ViewModel.BBoxWidgetIndex = mapControl.Map.Widgets.ToList().IndexOf(widget);
// and also here 
      mapControl.Map.Widgets.ElementAt(ViewModel.BBoxWidgetIndex).Enabled = false;
  }

2. 正如在buttonClick()上初始化小部件时所描述的那样,如果还不存在,那就不太好了。然而,如果我这样做,我可以先绘制多边形或直线,但在使用另一个之后,第一个将无法再次绘制。

/// <summary>
/// enables or disables Widget for LineLayer
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void DrawLine(object sender, RoutedEventArgs e)
{
    if (ViewModel.LineEditManager.Layer != ViewModel.LineLayer)
    {
        ViewModel.LineEditManager = new EditManager
        {
            Layer = (WritableLayer)mapControl.Map.Layers.First(l => l.Name == "Line"),
            EditMode = EditMode.AddLine,
        };
        IWidget widget = new EditingWidget(mapControl, ViewModel.LineEditManager, new EditManipulation());
        mapControl.Map.Widgets.Add(widget);
        ViewModel.LineWidgetIndex = mapControl.Map.Widgets.ToList().IndexOf(widget);
    }

    mapControl.Map.Widgets.ElementAt(ViewModel.LineWidgetIndex).Enabled = drawSection.IsChecked.Value; 
}

/// <summary>
/// enables or disables Widget for PolygonLayer
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DrawBBox(object sender, RoutedEventArgs e)
{
    if (ViewModel.BBoxEditManager.Layer != ViewModel.PolygonLayer)
    {
        ViewModel.BBoxEditManager = new EditManager
        {
            Layer = (WritableLayer)mapControl.Map.Layers.First(l => l.Name == "Polygon"),
            EditMode = EditMode.AddPolygon,
        };
        IWidget widget = new EditingWidget(mapControl, ViewModel.BBoxEditManager, new EditManipulation());
        mapControl.Map.Widgets.Add(widget);
        ViewModel.BBoxWidgetIndex = mapControl.Map.Widgets.ToList().IndexOf(widget);
    }

    mapControl.Map.Widgets.ElementAt(ViewModel.BBoxWidgetIndex).Enabled = drawBBox.IsChecked.Value; 
}

如果有人知道如何解决这些方法中的任何一种(甚至另一种),我将不胜感激。

提前谢谢。