private async void ResetViewPoint()
{
try
{
await MapViewService.ResetViewpointAsync();
}
catch (Exception)
{
// ignored
}
}
/// <summary>
/// Selects feature.
/// </summary>
private async void SelectFeature(MapViewInputEventArgs parameters)
{
// If editor is active skip selecting features
if (Editor.IsActive)
{
return;
}
// Unselect all features
var featureLayers = Map.Layers.OfType <FeatureLayer>();
foreach (var layer in featureLayers)
{
layer.ClearSelection();
}
GeodatabaseFeature feature = null;
Exception exceptionToHandle = null;
try
{
foreach (var layer in featureLayers.Where(l => l.Status == LayerStatus.Initialized).Reverse())
{
// Using MapViewService to handle hit testing.
var hit = await MapViewService.HitTestAsync(parameters.Position, layer) as GeodatabaseFeature;
if (hit != null)
{
// Set feature selected
layer.SelectFeatures(new[] { (long)hit.Attributes[layer.FeatureTable.ServiceInfo.ObjectIdField] });
// Take feature and its layer for later use
feature = hit;
_selectedLayer = layer;
break;
}
}
}
catch (Exception exception)
{
exceptionToHandle = exception;
}
if (exceptionToHandle != null)
{
// Initialization failed, show message and return
await MessageService.Instance.ShowMessage(string.Format(
"Could not create basemap. Error = {0}", exceptionToHandle.ToString()),
"An error occured");
}
// Select or clear selection
SelectedFeature = feature;
}
private async void ZoomOut()
{
try
{
double currentScale = MapViewService.MapScale;
await MapViewService.SetViewpointScaleAsync(currentScale * 1.5);
}
catch (Exception)
{
// Ignored
}
}
private async void MouseMoved(MouseEventArgs parameters)
{
if (startGraphic == null)
{
return;
}
// Get mouses location relative to MapView.
var point = MapViewService.GetLocation(parameters);
Exception exceptionToHandle = null;;
try
{
var graphic = await GetGeocodedGraphicAsync(point);
if (graphic == null)
{
return;
}
graphic.Attributes.Add("PointType", "EndPoint");
// Get endpoint graphic from the layer and replace that with new location
var existingGraphic = _graphicLayer
.Graphics
.FirstOrDefault(g => g.Attributes["PointType"].ToString() == "EndPoint");
if (existingGraphic != null)
{
_graphicLayer.Graphics.Remove(existingGraphic);
}
_graphicLayer.Graphics.Add(graphic);
var routeGraphic = await GetRouteGraphicAsync(
startGraphic.Geometry as MapPoint,
graphic.Geometry as MapPoint);
if (routeGraphic == null)
{
return;
}
_routeLayer.Graphics.Clear();
_routeLayer.Graphics.Add(routeGraphic);
}
catch (Exception exception)
{
}
}
