private async void MapViewTapped(object sender, GeoViewInputEventArgs geoViewInputEventArgs)
{
// Identify the tapped graphics
IdentifyGraphicsOverlayResult result = null;
try
{
result = await MyMapView.IdentifyGraphicsOverlayAsync(_graphicsOverlay, geoViewInputEventArgs.Position, 1, false);
}
catch (Exception e)
{
await new MessageDialog(e.ToString(), "Error").ShowAsync();
}
// Return if there are no results
if (result == null || result.Graphics.Count < 1)
{
return;
}
// Get the first identified graphic
Graphic identifiedGraphic = result.Graphics.First();
// Clear any existing selection, then select the tapped graphic
_graphicsOverlay.ClearSelection();
identifiedGraphic.IsSelected = true;
// Get the selected graphic's geometry
Geometry selectedGeometry = identifiedGraphic.Geometry;
// Perform the calculation and show the results
ResultTextbox.Text = GetOutputText(selectedGeometry);
}
private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
// Identify the tapped graphics
IdentifyGraphicsOverlayResult result = null;
try
{
result = await MyMapView.IdentifyGraphicsOverlayAsync(_graphicsOverlay, e.Position, 1, false);
}
catch (Exception ex)
{
await((Page)Parent).DisplayAlert("Error", ex.ToString(), "OK");
}
// Return if there are no results
if (result == null || result.Graphics.Count < 1)
{
return;
}
// Get the first identified graphic
Graphic identifiedGraphic = result.Graphics.First();
// Clear any existing selection, then select the tapped graphic
_graphicsOverlay.ClearSelection();
identifiedGraphic.IsSelected = true;
// Get the selected graphic's geometry
Geometry selectedGeometry = identifiedGraphic.Geometry;
// Perform the calculation and show the results
ResultTextbox.Text = GetOutputText(selectedGeometry);
}
private async void OnMapViewTapped(object sender, GeoViewInputEventArgs e)
{
double tolerance = 10d; // Use larger tolerance for touch
int maximumResults = 1; // Only return one graphic
bool onlyReturnPopups = false; // Don't return only popups
try
{
// Use the following method to identify graphics in a specific graphics overlay
IdentifyGraphicsOverlayResult identifyResults = await MyMapView.IdentifyGraphicsOverlayAsync(
_polygonOverlay,
e.Position,
tolerance,
onlyReturnPopups,
maximumResults);
// Check if we got results
if (identifyResults.Graphics.Count > 0)
{
// Display to the user the identify worked.
await new MessageDialog("Tapped on graphic", "").ShowAsync();
}
}
catch (Exception ex)
{
await new MessageDialog(ex.ToString(), "Error").ShowAsync();
}
}
private async void OnMapViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
double tolerance = 10d; // Use larger tolerance for touch
int maximumResults = 1; // Only return one graphic
bool onlyReturnPopups = false; // Don't return only popups
try
{
// Use the following method to identify graphics in a specific graphics overlay
IdentifyGraphicsOverlayResult identifyResults = await MyMapView.IdentifyGraphicsOverlayAsync(
_polygonOverlay,
e.Position,
tolerance,
onlyReturnPopups,
maximumResults);
// Check if we got results
if (identifyResults.Graphics.Count > 0)
{
// Make sure that the UI changes are done in the UI thread
Device.BeginInvokeOnMainThread(async() => {
await((Page)Parent).DisplayAlert("", "Tapped on graphic", "OK");
});
}
}
catch (Exception ex)
{
await((Page)Parent).DisplayAlert("Error", ex.ToString(), "OK");
}
}
private async void OnMapViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
var tolerance = 10d; // Use larger tolerance for touch
var maximumResults = 1; // Only return one graphic
var onlyReturnPopups = false; // Don't return only popups
// Use the following method to identify graphics in a specific graphics overlay
IdentifyGraphicsOverlayResult identifyResults = await MyMapView.IdentifyGraphicsOverlayAsync(
overlay,
e.Position,
tolerance,
onlyReturnPopups,
maximumResults
);
// Check if we got results
if (identifyResults.Graphics.Count > 0)
{
// Make sure that the UI changes are done in the UI thread
Device.BeginInvokeOnMainThread(async() => {
var json = JsonConvert.SerializeObject(identifyResults.Graphics[0].Attributes, Formatting.Indented);
await DisplayAlert("", json, "OK");
});
}
}
private async void MapViewTapped(object sender, GeoViewInputEventArgs geoViewInputEventArgs)
{
IdentifyGraphicsOverlayResult result = null;
try
{
// Identify the tapped graphics
result = await MyMapView.IdentifyGraphicsOverlayAsync(_graphicsOverlay, geoViewInputEventArgs.Position, 1, false);
}
catch (Exception e)
{
MessageBox.Show(e.ToString(), "Error");
}
// Return if there are no results
if (result == null || result.Graphics.Count < 1)
{
return;
}
// Get the first identified graphic
Graphic identifiedGraphic = result.Graphics.First();
// Clear any existing selection, then select the tapped graphic
_graphicsOverlay.ClearSelection();
identifiedGraphic.IsSelected = true;
// Get the selected graphic's geometry
Geometry selectedGeometry = identifiedGraphic.Geometry;
// Update the spatial relationship display
switch (selectedGeometry.GeometryType)
{
case GeometryType.Point:
PointTreeEntry.ItemsSource = null;
PolygonTreeEntry.ItemsSource = GetSpatialRelationships(selectedGeometry, _polygonGraphic.Geometry);
PolylineTreeEntry.ItemsSource = GetSpatialRelationships(selectedGeometry, _polylineGraphic.Geometry);
break;
case GeometryType.Polygon:
PolygonTreeEntry.ItemsSource = null;
PointTreeEntry.ItemsSource = GetSpatialRelationships(selectedGeometry, _pointGraphic.Geometry);
PolylineTreeEntry.ItemsSource = GetSpatialRelationships(selectedGeometry, _polylineGraphic.Geometry);
break;
case GeometryType.Polyline:
PolylineTreeEntry.ItemsSource = null;
PointTreeEntry.ItemsSource = GetSpatialRelationships(selectedGeometry, _pointGraphic.Geometry);
PolygonTreeEntry.ItemsSource = GetSpatialRelationships(selectedGeometry, _polygonGraphic.Geometry);
break;
}
// Expand the tree view
PolylineTreeEntry.IsExpanded = true;
PolygonTreeEntry.IsExpanded = true;
PointTreeEntry.IsExpanded = true;
}
async void MyMapView_GeoViewTapped(System.Object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
// Clear any currently visible callouts, route graphics, or selections
MyMapView.DismissCallout();
_routeGraphicsOverlay.Graphics.Clear();
_placesGraphicsOverlay.ClearSelection();
// Get the place under the tap
IdentifyGraphicsOverlayResult idResult = await MyMapView.IdentifyGraphicsOverlayAsync(_placesGraphicsOverlay, e.Position, 12, false);
Graphic clickedElement = idResult.Graphics.FirstOrDefault();
if (clickedElement != null)
{
// Select the place to highlight it; get name and address
clickedElement.IsSelected = true;
string name = clickedElement.Attributes["Name"].ToString();
string address = clickedElement.Attributes["Address"].ToString();
// Create a callout definition that shows the name and address for the place; set the element as a tag
CalloutDefinition definition = new CalloutDefinition(name, address);
definition.Tag = clickedElement;
// Handle button clicks for the button on the callout
// This event receives the value assigned as the CalloutDefinition.Tag
// ** Fix API ref for this!
// https://developers.arcgis.com/net/latest/wpf/api-reference/html/P_Esri_ArcGISRuntime_UI_CalloutDefinition_OnButtonClick.htm
definition.OnButtonClick = new Action <object>(async(tag) =>
{
// Get the geoelement that represents the place
GeoElement poiElement = tag as GeoElement;
if (poiElement == null)
{
return;
}
// Call a function in the viewmodel that will route to this location
var routeGraphic = await _viewModel.RouteToPoiAsync(_deviceLocation, poiElement.Geometry as MapPoint, MyMapView.SpatialReference);
// Add the route graphic to the map view and zoom to its extent
_routeGraphicsOverlay.Graphics.Add(routeGraphic);
await MyMapView.SetViewpointGeometryAsync(routeGraphic.Geometry, 30);
});
// Set the button icon and show the callout at the click location
definition.ButtonImage = WalkIcon;
MyMapView.ShowCalloutAt(e.Location, definition);
}
}
private async void OnMapViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.UI.GeoViewInputEventArgs e)
{
var tolerance = 10d; // Use larger tolerance for touch
var maximumResults = 1; // Only return one graphic
// Use the following method to identify graphics in a specific graphics overlay
IReadOnlyList <Graphic> identifyResults = await MyMapView.IdentifyGraphicsOverlayAsync(
_polygonOverlay,
e.Position,
tolerance, maximumResults);
// Check if we got results
if (identifyResults.Count > 0)
{
// Make sure that the UI changes are done in the UI thread
Device.BeginInvokeOnMainThread(async() => {
await DisplayAlert("", "Tapped on graphic", "OK");
});
}
}
private async void OnMapViewTapped(object sender, GeoViewInputEventArgs e)
{
double tolerance = 10d; // Use larger tolerance for touch
int maximumResults = 1; // Only return one graphic
bool onlyReturnPopups = false; // Return more than popups
// Use the following method to identify graphics in a specific graphics overlay
IdentifyGraphicsOverlayResult identifyResults = await MyMapView.IdentifyGraphicsOverlayAsync(
_polygonOverlay,
e.Position,
tolerance,
onlyReturnPopups,
maximumResults);
// Check if we got results
if (identifyResults.Graphics.Count > 0)
{
// Display to the user the identify worked.
MessageBox.Show("Tapped on graphic", "");
}
}