/// <summary>
/// Creates a new view model object based on the given layer object
/// </summary>
/// <param name="parentViewModel">parent view model</param>
/// <param name="layer">layer object</param>
public LayerListEntryViewModel(LayerListViewModel parentViewModel, Layer layer)
{
this.parentViewModel = parentViewModel;
this.layer = layer;
this.TypeImageSource = SvgImageCache.GetImageSource(layer, "#000000");
this.VisibilityImageSource = SvgImageCache.GetLayerVisibilityImageSource(layer, "#000000");
this.SetupBindings();
}
/// <summary>
/// Sets up bindings for this view model
/// </summary>
private void SetupBindings()
{
this.TypeImageSource = SvgImageCache.GetImageSource(this.Layer);
this.VisibilityImageSource = SvgImageCache.GetLayerVisibilityImageSource(this.Layer);
this.ItemTappedCommand = new AsyncCommand(this.OnTappedLayerItemAsync);
this.VisibilityTappedCommand = new AsyncCommand(this.OnTappedLayerVisibilityAsync);
this.ZoomToLayerCommand = new AsyncCommand(this.OnZoomToLayerAsync, this.OnCanExecuteZoomToLayer);
this.ExportLayerCommand = new AsyncCommand(this.OnExportLayerAsync, this.OnCanExecuteExportLayer);
this.DeleteLayerCommand = new AsyncCommand(this.OnDeleteLayerAsync, this.OnCanExecuteDeleteLayer);
}
/// <summary>
/// Called when the user tapped on the layer visibility icon
/// </summary>
/// <returns>task to wait on</returns>
private async Task OnTappedLayerVisibilityAsync()
{
this.Layer.IsVisible = !this.Layer.IsVisible;
IDataService dataService = DependencyService.Get <IDataService>();
var layerDataService = dataService.GetLayerDataService();
await layerDataService.Update(this.Layer);
App.MapView.SetLayerVisibility(this.Layer);
this.VisibilityImageSource = SvgImageCache.GetLayerVisibilityImageSource(this.Layer);
this.OnPropertyChanged(nameof(this.VisibilityImageSource));
}
