private async void LoadRecursive(IList <LegendInfo> itemsList, ILayerContent content, bool recursive)
{
if (content == null)
{
return;
}
try
{
#pragma warning disable ESRI1800 // Add ConfigureAwait(false) - This is UI Dependent code and must return to UI Thread
var legendInfo = await content.GetLegendInfosAsync();
#pragma warning restore ESRI1800
foreach (var item in legendInfo)
{
itemsList.Add(item);
}
}
catch
{
return;
}
if (recursive)
{
foreach (var item in content.SublayerContents)
{
LoadRecursive(itemsList, item, recursive);
}
}
}
private void Layer_PropertyChanged(ILayerContent sender, string?propertyName)
{
var layer = sender as ILayerContent;
if (layer is ILoadable loadable && propertyName == nameof(ILoadable.LoadStatus) && loadable.LoadStatus == LoadStatus.Loaded)
{
MarkCollectionDirty();
}
private async Task <TreeViewItem> TraverseLayer(ILayerContent layer, TreeViewItem root)
{
try
{
Logging.LogMethodCall(MethodBase.GetCurrentMethod().DeclaringType.Name, () => new Dictionary <String, Object> {
{ nameof(layer), layer },
{ nameof(root), root }
});
root.CanDisable = layer.CanChangeVisibility;
root.IsChecked = layer.IsVisible;
root.MirrorToParent = false;
root.Layer = layer;
IReadOnlyList <LegendInfo> lgnd = await layer.GetLegendInfosAsync();
if (lgnd.Count() == 1)
{
root.SetSymbol(lgnd[0].Symbol);
}
else
{
List <String> labelsAdded = new List <String>();
foreach (var smbl in lgnd)
{
if (!labelsAdded.Contains(smbl.Name))
{
var item = new TreeViewItem(smbl.Name, smbl.Symbol);
item.CanDisable = false;
root.Children.Add(item);
labelsAdded.Add(smbl.Name);
}
}
}
foreach (var subLyr in layer.SublayerContents)
{
var info = lgnd.FirstOrDefault(inf => inf.Name == subLyr.Name);
TreeViewItem child = null;
if (info == null)
{
child = await TraverseLayer(subLyr, new TreeViewItem(subLyr.Name));
}
else
{
child = await TraverseLayer(subLyr, new TreeViewItem(subLyr.Name, info.Symbol));
}
root.Children.Add(child);
}
return(root);
}
catch (Exception ex)
{
var message = "Error traversing layer";
ErrorHelper.OnError(MethodBase.GetCurrentMethod().DeclaringType.Name, message, ex);
Logging.LogMessage(Logging.LogType.Error, message, ex);
return(root);
}
}
private static IEnumerable <LayerModel> CreateLayerModels(ILayerContent layer, int depth)
{
yield return(new LayerModel(layer, depth));
depth++;
foreach (var sublayerContent in layer.SublayerContents)
{
foreach (var flattened in CreateLayerModels(sublayerContent, depth))
{
yield return(flattened);
}
}
}
public LayerContentViewModel(ILayerContent layerContent, WeakReference <GeoView> view, Symbology.Symbol symbol = null, bool generateLegend = true)
{
_context = SynchronizationContext.Current ?? new SynchronizationContext();
LayerContent = layerContent;
_view = view;
Symbol = symbol;
_generateLegend = generateLegend;
if (LayerContent is INotifyPropertyChanged)
{
(LayerContent as INotifyPropertyChanged).PropertyChanged += LayerContentViewModel_PropertyChanged;
}
if (LayerContent.SublayerContents is INotifyCollectionChanged)
{
var incc = LayerContent.SublayerContents as INotifyCollectionChanged;
var listener = new Internal.WeakEventListener <INotifyCollectionChanged, object, NotifyCollectionChangedEventArgs>(incc);
listener.OnEventAction = (instance, source, eventArgs) => { LayerContentViewModel_CollectionChanged(source, eventArgs); };
listener.OnDetachAction = (instance, weakEventListener) => instance.CollectionChanged -= weakEventListener.OnEvent;
incc.CollectionChanged += listener.OnEvent;
}
if (layerContent is Esri.ArcGISRuntime.ILoadable)
{
var l = layerContent as Esri.ArcGISRuntime.ILoadable;
UpdateLoadingStatus();
}
if (LayerContent is Layer)
{
Layer layer = LayerContent as Layer;
GeoView gview;
if (layer.LoadStatus != LoadStatus.NotLoaded && _view.TryGetTarget(out gview))
{
try
{
var viewState = gview.GetLayerViewState(layer);
UpdateLayerViewState(viewState);
}
catch (ArgumentException)
{
}
}
else
{
UpdateLayerViewState(null);
}
}
}
private TreeViewItem TraverseLayer(ILayerContent layer, TreeViewItem root)
{
root.CanDisable = layer.CanChangeVisibility;
root.IsChecked = layer.IsVisible;
root.MirrorToParent = false;
Console.WriteLine(layer.SublayerContents.Count);
root.Layer = layer;
var lgnd = layer.GetLegendInfosAsync().Result;
if (lgnd.Count == 1)
{
root.SetSymbol(lgnd[0].Symbol);
}
else
{
foreach (var smbl in lgnd)
{
var item = new TreeViewItem(smbl.Name, smbl.Symbol);
item.CanDisable = false;
root.Children.Add(item);
}
}
foreach (var subLyr in layer.SublayerContents)
{
var info = lgnd.FirstOrDefault(inf => inf.Name == subLyr.Name);
TreeViewItem child = null;
if (info == null)
{
child = TraverseLayer(subLyr, new TreeViewItem(subLyr.Name));
}
else
{
child = TraverseLayer(subLyr, new TreeViewItem(subLyr.Name, info.Symbol));
}
root.Children.Add(child);
}
return(root);
}
private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.UI.Controls.GeoViewInputEventArgs e)
{
try
{
// Perform an identify across all layers, taking up to 10 results per layer.
IReadOnlyList <IdentifyLayerResult> myIdentifyLayerResults = await MyMapView.IdentifyLayersAsync(e.Position, 15, false, 10);
// Loop through each layer result in the collection of identify layer results.
foreach (IdentifyLayerResult layerResult in myIdentifyLayerResults)
{
// Get the layer content from the layer result.
ILayerContent myLayerContent = layerResult.LayerContent;
// Get the name of the layer content (i.e. the name of the layer).
string lc_Name = myLayerContent.Name;
// We are only interested in the identify layer results for the created feature collection layer that
// was generated from the NY Times articles.
if (lc_Name == "JoinedFCL")
{
// Get the sub layer results for the NY Times generated feature collection layer.
IReadOnlyList <IdentifyLayerResult> myIdentifyLayerResultsSubLayer = layerResult.SublayerResults;
// Get the first result found from identify operation on the NY Times generated feature collection layer.
IdentifyLayerResult myIdentifyLayerResultNYTimesFeatureCollectionTable = myIdentifyLayerResultsSubLayer.First();
// Get the geo-element collection from the first result.
IReadOnlyList <GeoElement> myGeoElements = myIdentifyLayerResultNYTimesFeatureCollectionTable.GeoElements;
// Get the first geo-element in the geo-element collection. This is the identified country (via the mouse click/tap)
// in the NY Times feature collection layer.
GeoElement myGeoElement = myGeoElements.First();
// Loop through key/value pair of the features attributes in the NY Times feature collection layer.
foreach (KeyValuePair <string, object> myKeyValuePair in myGeoElement.Attributes)
{
// Get the key (aka. field name).
var myKey = myKeyValuePair.Key;
// Get the value (aka. the text for the record of a specific field).
var myValue = myKeyValuePair.Value;
// Check is the name of the field in the NY Times feature collection layer 'AreaName'. This represents the country name.
if (myKey == "AreaName")
{
// Read the NY Times data from the text file and get back a list of each article.
// The format of each record/article will look like:
// [Article summary]~[Article abstract]~[Country name]~[Url to the NY times article]~[Url to an image about the NY times article]~[Date of NY Times news article]
// Ex:
// Netanyahu not happy with Cohen~A spokesman for Prime Minister Benjamin Netanyahu disagrees with Roger Cohen’s “pessimism.”~Israel~https://www.nytimes.com/2018/01/02/opinion/israel-future.html~https://www.nytimes.com/images/2017/12/29/opinion/29cohenWeb/29cohenWeb-thumbLarge.jpg~20180102
List <string> myNYTimesArticles = ReadTextFile3(_NEWSFILE);
// Create a FlowDocument to contain content for the RichTextBox.
FlowDocument myFlowDoc = new FlowDocument();
// Loop through each NY Times article.
foreach (var oneNYTimesArticle in myNYTimesArticles)
{
// Char array to remove embedded double quotes from various NT Times strings.
char[] charsToTrim = { '"' };
// Get various sub-parts of the records for each NY Times article.
string title = oneNYTimesArticle.Split('~')[0].Trim(charsToTrim);
string absrtact = oneNYTimesArticle.Split('~')[1].Trim(charsToTrim);
string country = oneNYTimesArticle.Split('~')[2].Trim(charsToTrim);
string newsurl = oneNYTimesArticle.Split('~')[3].Trim(charsToTrim);
string imageurl = oneNYTimesArticle.Split('~')[4].Trim(charsToTrim);
string date = oneNYTimesArticle.Split('~')[5].Trim(charsToTrim);
// Find a match from the NY Times feature collection layer feature country name and the NY
// Times country name in the article.
if (myValue.ToString() == country)
{
// Create a paragraph.
Paragraph myParagraph = new Paragraph();
myParagraph.FontSize = 18;
// Create a run that contains the country and a new line.
Run myRun = new Run(myValue.ToString() + System.Environment.NewLine);
// Create a bold that contains short title (aka news headline) of the NY Times article.
Bold myBold = new Bold(new Run(title));
// Create a run that contains a new line.
Run myRun2 = new Run(System.Environment.NewLine);
// Create a new run that contains the hyperlink to the NY Times article.
Run myRun7 = new Run(newsurl);
// Create a new hyperlink based on the run.
Hyperlink myHP = new Hyperlink(myRun7);
// Set the hyperlink to the uri of the NY Times news article.
myHP.NavigateUri = new Uri(newsurl);
// Wire up the event handler when the user holds down the CTRL key and presses on the hyperlink for
// the NY Times article shown in the rich text box.
myHP.Click += MyHP_Click;
// Add all of the sub components of the paragraph that make up what will be displayed for each NY
// Times article in the rich text box.
myParagraph.Inlines.Add(myRun);
myParagraph.Inlines.Add(myBold);
myParagraph.Inlines.Add(myRun2);
myParagraph.Inlines.Add(myHP);
// Add the paragraph to the flow document's block collection.
myFlowDoc.Blocks.Add(myParagraph);
}
}
// Make sure that the user is able to click on hyper links in the rick text box. Requires that the .IsDocumentEnabled be true.
MyRichTextBox.IsDocumentEnabled = true;
// Add initial content to the RichTextBox.
MyRichTextBox.Document = myFlowDoc;
}
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Error");
}
}
public LayerModel(ILayerContent layer, int ancestors)
{
this.Ancestors = ancestors;
this.Layer = layer;
}
public LayerContentViewModel(ILayerContent layerContent, WeakReference <GeoView> view, Symbology.Symbol symbol = null, bool generateLegend = true)
{
_context = SynchronizationContext.Current ?? new SynchronizationContext();
LayerContent = layerContent;
_view = view;
Symbol = symbol;
_generateLegend = generateLegend;
if (LayerContent is INotifyPropertyChanged)
{
(LayerContent as INotifyPropertyChanged).PropertyChanged += LayerContentViewModel_PropertyChanged;
}
if (LayerContent.SublayerContents is INotifyCollectionChanged)
{
var incc = LayerContent.SublayerContents as INotifyCollectionChanged;
var listener = new Internal.WeakEventListener <INotifyCollectionChanged, object, NotifyCollectionChangedEventArgs>(incc);
listener.OnEventAction = (instance, source, eventArgs) => { LayerContentViewModel_CollectionChanged(source, eventArgs); };
listener.OnDetachAction = (instance, weakEventListener) => instance.CollectionChanged -= weakEventListener.OnEvent;
incc.CollectionChanged += listener.OnEvent;
}
if (layerContent is Esri.ArcGISRuntime.ILoadable)
{
var l = layerContent as Esri.ArcGISRuntime.ILoadable;
ReloadCommand = _reloadCommand = new DelegateCommand(
(s) =>
{
l.RetryLoadAsync();
UpdateLoadingStatus();
},
(s) =>
{
return(l.LoadStatus == Esri.ArcGISRuntime.LoadStatus.FailedToLoad);
});
UpdateLoadingStatus();
}
else
{
ReloadCommand = _reloadCommand = new DelegateCommand((s) => { }, (s) => { return(false); });
}
if (LayerContent is Layer)
{
Layer layer = LayerContent as Layer;
GeoView gview;
if (layer.LoadStatus != LoadStatus.NotLoaded && _view.TryGetTarget(out gview))
{
try
{
var viewState = gview.GetLayerViewState(layer);
UpdateLayerViewState(viewState);
}
catch (ArgumentException)
{
}
}
else
{
UpdateLayerViewState(null);
}
}
ZoomToCommand = _zoomToCommand = new DelegateCommand(
(s) =>
{
GeoView gview;
bool hasView = _view.TryGetTarget(out gview);
if (hasView)
{
var vp = GetExtent();
if (vp != null)
{
gview.SetViewpointAsync(vp);
}
}
}, (s) =>
{
GeoView gview;
return(_view.TryGetTarget(out gview) && GetExtent() != null);
});
}
