GeoBlazor Pro
dymaptic.GeoBlazor.Pro
dymaptic.GeoBlazor.Pro.Components
TrackViewModel Class
Provides the logic for the Track component and Track widget, which animates the View to the user’s location when clicked and tracks it as the location is updated. ArcGIS Maps SDK for JavaScript
public class TrackViewModel : dymaptic.GeoBlazor.Core.Components.MapComponent, dymaptic.GeoBlazor.Core.Interfaces.IGeolocationPositioning, dymaptic.GeoBlazor.Core.Interfaces.IMapComponent, dymaptic.GeoBlazor.Core.Interfaces.IGoTo
Inheritance System.Object 🡒 Microsoft.AspNetCore.Components.ComponentBase 🡒 MapComponent 🡒 TrackViewModel
Implements IGeolocationPositioning, IMapComponent, IGoTo
Constructors
TrackViewModel() Constructor
Parameterless constructor for use as a Razor Component.
public TrackViewModel();
TrackViewModel(Error, GeolocationOptions, Nullable, GoToOverride, Graphic, Func, Nullable) Constructor
Constructor for use in C# code. Use named parameters (e.g., item1: value1, item2: value2) to set properties in any order.
public TrackViewModel(dymaptic.GeoBlazor.Core.Model.Error? error=null, dymaptic.GeoBlazor.Core.Components.GeolocationOptions? geolocationOptions=null, System.Nullable<bool> goToLocationEnabled=null, dymaptic.GeoBlazor.Core.Functions.GoToOverride? goToOverride=null, dymaptic.GeoBlazor.Core.Components.Graphic? graphic=null, System.Func<System.Threading.Tasks.Task>? positionFilterFunction=null, System.Nullable<double> scale=null);
Parameters
error Error
Error that caused the last track-error event to fire. default null ArcGIS Maps SDK for JavaScript
geolocationOptions GeolocationOptions
An object used for setting optional position parameters. default null ArcGIS Maps SDK for JavaScript
goToLocationEnabled System.Nullable<System.Boolean>
Indicates whether to navigate the view to the position and scale of the geolocated result. default true ArcGIS Maps SDK for JavaScript
goToOverride GoToOverride(GoToOverrideParameters)
This function provides the ability to override either the MapView goTo() or SceneView goTo() methods. ArcGIS Maps SDK for JavaScript
graphic Graphic
The graphic used to show the user’s location on the map. ArcGIS Maps SDK for JavaScript
positionFilterFunction System.Func<System.Threading.Tasks.Task>
A function that is used as an expression to evaluate geolocation points, and returns a boolean value. default null ArcGIS Maps SDK for JavaScript
scale System.Nullable<System.Double>
Indicates the scale to set on the view when navigating to the position of the geolocated result, after a location is returned from the track event. default null ArcGIS Maps SDK for JavaScript
Properties
TrackViewModel.Error Property
Error that caused the last track-error event to fire. default null ArcGIS Maps SDK for JavaScript
public dymaptic.GeoBlazor.Core.Model.Error? Error { get; set; }
Property Value
TrackViewModel.GeolocationOptions Property
An object used for setting optional position parameters. default null ArcGIS Maps SDK for JavaScript
public dymaptic.GeoBlazor.Core.Components.GeolocationOptions? GeolocationOptions { get; set; }
Implements GeolocationOptions
Property Value
TrackViewModel.GoToLocationEnabled Property
Indicates whether to navigate the view to the position and scale of the geolocated result. default true ArcGIS Maps SDK for JavaScript
public System.Nullable<bool> GoToLocationEnabled { get; set; }
Implements GoToLocationEnabled
Property Value
System.Nullable<System.Boolean>
TrackViewModel.GoToOverride Property
This function provides the ability to override either the MapView goTo() or SceneView goTo() methods. ArcGIS Maps SDK for JavaScript
public dymaptic.GeoBlazor.Core.Functions.GoToOverride? GoToOverride { get; set; }
Implements GoToOverride
Property Value
GoToOverride(GoToOverrideParameters)
TrackViewModel.Graphic Property
The graphic used to show the user’s location on the map. ArcGIS Maps SDK for JavaScript
public dymaptic.GeoBlazor.Core.Components.Graphic? Graphic { get; set; }
Implements Graphic
Property Value
TrackViewModel.HasGoToOverride Property
A convenience property that signifies whether a custom GoToOverride function was registered.
public bool HasGoToOverride { get; }
Implements HasGoToOverride
Property Value
TrackViewModel.HasTrackErrorListener Property
Used in JavaScript layer to determine if the event listener is registered.
public bool HasTrackErrorListener { get; }
Property Value
TrackViewModel.HasTrackListener Property
Used in JavaScript layer to determine if the event listener is registered.
public bool HasTrackListener { get; }
Property Value
TrackViewModel.OnTrack Property
Fires after the start() method is called and a position is found.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Pro.Events.TrackViewModelTrackEvent> OnTrack { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<TrackViewModelTrackEvent>
TrackViewModel.OnTrackError Property
Fires after the start() method is called and an error is returned.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Pro.Events.TrackViewModelTrackErrorEvent> OnTrackError { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<TrackViewModelTrackErrorEvent>
TrackViewModel.PositionFilterFunction Property
A function that is used as an expression to evaluate geolocation points, and returns a boolean value. default null ArcGIS Maps SDK for JavaScript
public System.Func<System.Threading.Tasks.Task>? PositionFilterFunction { get; set; }
Property Value
System.Func<System.Threading.Tasks.Task>
TrackViewModel.Scale Property
Indicates the scale to set on the view when navigating to the position of the geolocated result, after a location is returned from the track event. default null ArcGIS Maps SDK for JavaScript
public System.Nullable<double> Scale { get; set; }
Implements Scale
Property Value
System.Nullable<System.Double>
TrackViewModel.State Property
The current state of the widget. default “disabled” ArcGIS Maps SDK for JavaScript
public System.Nullable<dymaptic.GeoBlazor.Pro.Enums.TrackViewModelState> State { get; }
Property Value
System.Nullable<TrackViewModelState>
TrackViewModel.Tracking Property
Indicates whether new positions are being watched. default false ArcGIS Maps SDK for JavaScript
public System.Nullable<bool> Tracking { get; }
Property Value
System.Nullable<System.Boolean>
Methods
TrackViewModel.GetError() Method
Asynchronously retrieve the current value of the Error property.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Model.Error?> GetError();
Returns
System.Threading.Tasks.Task<Error>
TrackViewModel.GetGeolocationOptions() Method
Asynchronously retrieve the current value of the GeolocationOptions property.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.GeolocationOptions?> GetGeolocationOptions();
Implements GetGeolocationOptions()
Returns
System.Threading.Tasks.Task<GeolocationOptions>
TrackViewModel.GetGoToLocationEnabled() Method
Asynchronously retrieve the current value of the GoToLocationEnabled property.
public System.Threading.Tasks.Task<System.Nullable<bool>> GetGoToLocationEnabled();
Implements GetGoToLocationEnabled()
Returns
System.Threading.Tasks.Task<System.Nullable<System.Boolean>>
TrackViewModel.GetGraphic() Method
Asynchronously retrieve the current value of the Graphic property.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Graphic?> GetGraphic();
Implements GetGraphic()
Returns
System.Threading.Tasks.Task<Graphic>
TrackViewModel.GetPositionFilterFunction() Method
Asynchronously retrieve the current value of the PositionFilterFunction property.
public System.Threading.Tasks.Task<System.Func<System.Threading.Tasks.Task>?> GetPositionFilterFunction();
Returns
System.Threading.Tasks.Task<System.Func<System.Threading.Tasks.Task>>
TrackViewModel.GetScale() Method
Asynchronously retrieve the current value of the Scale property.
public System.Threading.Tasks.Task<System.Nullable<double>> GetScale();
Implements GetScale()
Returns
System.Threading.Tasks.Task<System.Nullable<System.Double>>
TrackViewModel.GetState() Method
Asynchronously retrieve the current value of the State property.
public System.Threading.Tasks.Task<System.Nullable<dymaptic.GeoBlazor.Pro.Enums.TrackViewModelState>> GetState();
Returns
System.Threading.Tasks.Task<System.Nullable<TrackViewModelState>>
TrackViewModel.GetTracking() Method
Asynchronously retrieve the current value of the Tracking property.
public System.Threading.Tasks.Task<System.Nullable<bool>> GetTracking();
Returns
System.Threading.Tasks.Task<System.Nullable<System.Boolean>>
TrackViewModel.OnJsGoToOverride(IJSStreamReference) Method
JS-invokable method that triggers the GoToOverride function. Should not be called by consuming code.
public System.Threading.Tasks.Task OnJsGoToOverride(Microsoft.JSInterop.IJSStreamReference jsStreamRef);
Parameters
jsStreamRef Microsoft.JSInterop.IJSStreamReference
Implements OnJsGoToOverride(IJSStreamReference)
Returns
TrackViewModel.OnJsTrack(IJSStreamReference) Method
JavaScript-Invokable Method for internal use only.
public System.Threading.Tasks.Task OnJsTrack(Microsoft.JSInterop.IJSStreamReference jsStreamRef);
Parameters
jsStreamRef Microsoft.JSInterop.IJSStreamReference
Returns
TrackViewModel.OnJsTrackError(IJSStreamReference) Method
JavaScript-Invokable Method for internal use only.
public System.Threading.Tasks.Task OnJsTrackError(Microsoft.JSInterop.IJSStreamReference jsStreamRef);
Parameters
jsStreamRef Microsoft.JSInterop.IJSStreamReference
Returns
TrackViewModel.SetError(Error) Method
Asynchronously set the value of the Error property after render.
public System.Threading.Tasks.Task SetError(dymaptic.GeoBlazor.Core.Model.Error? value);
Parameters
value Error
The value to set.
Returns
TrackViewModel.SetGeolocationOptions(GeolocationOptions) Method
Asynchronously set the value of the GeolocationOptions property after render.
public System.Threading.Tasks.Task SetGeolocationOptions(dymaptic.GeoBlazor.Core.Components.GeolocationOptions? value);
Parameters
value GeolocationOptions
The value to set.
Implements SetGeolocationOptions(GeolocationOptions)
Returns
TrackViewModel.SetGoToLocationEnabled(Nullable) Method
Asynchronously set the value of the GoToLocationEnabled property after render.
public System.Threading.Tasks.Task SetGoToLocationEnabled(System.Nullable<bool> value);
Parameters
value System.Nullable<System.Boolean>
The value to set.
Implements SetGoToLocationEnabled(Nullable<bool>)
Returns
TrackViewModel.SetGraphic(Graphic) Method
Asynchronously set the value of the Graphic property after render.
public System.Threading.Tasks.Task SetGraphic(dymaptic.GeoBlazor.Core.Components.Graphic? value);
Parameters
value Graphic
The value to set.
Implements SetGraphic(Graphic)
Returns
TrackViewModel.SetPositionFilterFunction(Func) Method
Asynchronously set the value of the PositionFilterFunction property after render.
public System.Threading.Tasks.Task SetPositionFilterFunction(System.Func<System.Threading.Tasks.Task>? value);
Parameters
value System.Func<System.Threading.Tasks.Task>
The value to set.
Returns
TrackViewModel.SetScale(Nullable) Method
Asynchronously set the value of the Scale property after render.
public System.Threading.Tasks.Task SetScale(System.Nullable<double> value);
Parameters
value System.Nullable<System.Double>
The value to set.
Implements SetScale(Nullable<double>)
Returns
TrackViewModel.Start() Method
When executed, tracking starts at the user’s location. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task Start();
Returns
TrackViewModel.Stop() Method
Stops tracking the user’s location when executed. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task Stop();
Returns
TrackViewModel.ValidateRequiredGeneratedChildren() Method
Validates source-generated child components.
public override void ValidateRequiredGeneratedChildren();
Implements ValidateRequiredGeneratedChildren()