private async void myMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Identify the tapped graphics
IdentifyGraphicsOverlayResult result = null;
try
{
result = await _myMapView.IdentifyGraphicsOverlayAsync(_graphicsOverlay, e.Position, 1, false);
}
catch (Exception ex)
{
new AlertDialog.Builder(this).SetMessage(ex.ToString()).SetTitle("Error").Show();
}
// 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
_resultTextView.Text = GetOutputText(selectedGeometry);
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Identify the tapped graphics.
IdentifyGraphicsOverlayResult result = null;
try
{
result = await _myMapView.IdentifyGraphicsOverlayAsync(_graphicsOverlay, e.Position, 1, false);
}
catch (Exception ex)
{
new UIAlertView("Error", ex.ToString(), (IUIAlertViewDelegate)null, "OK", null).Show();
}
// Return if there are no results.
if (result == null || result.Graphics.Count < 1)
{
return;
}
// Get the smallest identified graphic.
Graphic identifiedGraphic = result.Graphics.OrderBy(graphic => GeometryEngine.Area(graphic.Geometry)).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.
_resultTextView.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 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);
}
// Hittest the graphics layer and show the map tip for the selected graphic
private async void MyMapView_MapViewTapped(object sender, MapViewInputEventArgs e)
{
try
{
_graphicsOverlay.ClearSelection();
var graphic = await _graphicsOverlay.HitTestAsync(MyMapView, e.Position);
if (graphic != null)
{
graphic.IsSelected = true;
MapView.SetViewOverlayAnchor(_mapTip, e.Location);
_mapTip.DataContext = graphic;
_mapTip.Visibility = Visibility.Visible;
}
else
{
_mapTip.Visibility = Visibility.Collapsed;
}
}
catch
{
_mapTip.Visibility = Visibility.Collapsed;
}
}
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;
}
private void listDirections_SelectionChanged(object sender, Windows.UI.Xaml.Controls.SelectionChangedEventArgs e)
{
_directionsOverlay.ClearSelection();
if (e.AddedItems != null && e.AddedItems.Count == 1)
{
var graphic = e.AddedItems[0] as Graphic;
graphic.IsSelected = true;
}
}
private void FilterGraphicsBasedonSelection(object selectedvalue, GraphicsOverlay gl)
{
//var selectedvalue = ((Selector)sender).SelectedValue;
gl.ClearSelection();
gl.Graphics.Where(x =>
(x.Attributes.Keys.Contains("Primary Type") == true) &&
(x.Attributes["Primary Type"].ToString() == selectedvalue.ToString()))
.ToList().ForEach(selectGraphic);
mapViewModel.SelectedGraphicsCount = $"Found {gl.SelectedGraphics.Count().ToString()} crimes ";
}
private void listResults_SelectionChanged(object sender, Windows.UI.Xaml.Controls.SelectionChangedEventArgs e)
{
_addressOverlay.ClearSelection();
if (e.AddedItems != null)
{
foreach (var graphic in e.AddedItems.OfType <Graphic>())
{
graphic.IsSelected = true;
}
}
}
private void resultsGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
_graphicsOverlay.ClearSelection();
if (e.AddedItems != null && e.AddedItems.Count > 0)
{
var graphic = e.AddedItems[0] as Graphic;
if (graphic != null)
{
graphic.IsSelected = true;
}
}
}
void listDirections_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
_directionsOverlay.ClearSelection();
if (e.AddedItems != null && e.AddedItems.Count == 1)
{
var graphic = e.AddedItems[0] as Graphic;
if (graphic != null)
{
graphic.IsSelected = true;
}
}
}
private async void listDirections_SelectionChanged(object sender, Windows.UI.Xaml.Controls.SelectionChangedEventArgs e)
{
_directionsOverlay.ClearSelection();
if (e.AddedItems != null && e.AddedItems.Count == 1)
{
var graphic = e.AddedItems[0] as Graphic;
ShowHideDirectionsButton.Icon = new SymbolIcon(Windows.UI.Xaml.Controls.Symbol.Add);
listDirections.Visibility = Visibility.Collapsed;
await MyMapView.SetViewAsync(graphic.Geometry.Extent.Expand(1.25));
graphic.IsSelected = 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 void CancelButton_click(object sender, RoutedEventArgs e)
{
_sketchOverlay.Graphics.Clear();
overviewoverlay.ClearSelection();
generaloverlay.ClearSelection();
coastaloverlay.ClearSelection();
approachoverlay.ClearSelection();
berthingoverlay.ClearSelection();
harbouroverlay.ClearSelection();
if (MyMapView.SketchEditor.CancelCommand.CanExecute(null))
{
MyMapView.SketchEditor.CancelCommand.Execute(null);
// lvUsers.Items.Clear();
// var systemCursor1 = System.Windows.Input.Cursors.Arrow;
// Cursor = systemCursor1;
// MyMapView.GeoViewTapped -= MyMapView_OnGeoViewTapped;
// MyMapView.GeoViewTapped += MapViewTapped;
}
}
private async void myMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Identify the tapped graphics
IdentifyGraphicsOverlayResult result = await _myMapView.IdentifyGraphicsOverlayAsync(_graphicsOverlay, e.Position, 1, false);
// Return if there are no results
if (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
_resultTextView.Text = GetOutputText(selectedGeometry);
}
// 裁剪
private void ClipMenuItem_Click(object sender, RoutedEventArgs e)
{
operation = OperateType.Cal_Clip;
graphicsLayer.ClearSelection();
listOfClipGraphics.Clear();
}
// myMapView 事件
private async void MyMapView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
IInputElement ie = (IInputElement)(sender);
MapPoint loc = myMapView.ScreenToLocation(e.GetPosition(ie));
switch (operation)
{
case OperateType.DrawPoint: //画点
Graphic pt = new Graphic(loc, pointSymbol);
graphicsLayer.Graphics.Add(pt);
break;
case OperateType.DrawPolyline: //画线
pointCollection.Add(loc); if (pointCollection.Count >= 2)
{
if (pointCollection.Count > 2)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolylineBuilder lb = new PolylineBuilder(pointCollection); g.Geometry = lb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polyline l = new Esri.ArcGISRuntime.Geometry.Polyline(pointCollection);
Graphic lg = new Graphic(l, lineSymbol);
graphicsLayer.Graphics.Add(lg);
}
}
break;
case OperateType.DrawPolygon: //画多边形
pointCollection.Add(loc); if (pointCollection.Count >= 3)
{
if (pointCollection.Count > 3)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolygonBuilder pb = new PolygonBuilder(pointCollection); g.Geometry = pb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polygon p = new Esri.ArcGISRuntime.Geometry.Polygon(pointCollection);
Graphic pg = new Graphic(p, fillSymbol);
graphicsLayer.Graphics.Add(pg);
}
}
break;
case OperateType.None: //缺省状态
graphicsLayer.ClearSelection();
IdentifyGraphicsOverlayResult result = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
//选择图形元素
if (result.Graphics.Count < 1)
{
curSelGraphic = null;
EditVertexMenuItem.IsEnabled = false;
UneditVertexMenuItem.IsEnabled = false;
return;
}
curSelGraphic = result.Graphics.First();
curSelGraphic.IsSelected = true;
EditVertexMenuItem.IsEnabled = true;
break;
}
}
