/// <summary>
/// Handles the Go-To envelope request, actually not doing any Go-To action, but just
/// recording this ins our history for resending later upon request.
/// </summary>
private void HandleGoToEnvelopeRequest(LiteGoToGeometryRequestMessage request, bool force)
{
if (request.StoreInHistory && request != null && !String.IsNullOrEmpty(request.Description) && request.Envelope != null)
{
// In case of default behavior (not forcing), remove any previous references to the same description
// This is very loose, but the description is all the user sees so there is no way of distinguishing
// between two similar descriptions anyway.
if (!force)
{
var description = request.Description;
for (int nr = RecentlyVisitedItems.Count - 1; nr >= 0; nr--)
{
if (String.Compare(description, RecentlyVisitedItems[nr].Description, StringComparison.Ordinal) == 0)
{
RecentlyVisitedItems.RemoveAt(nr);
}
}
}
// Insert the request
RecentlyVisitedItems.Insert(0, request);
if (RecentlyVisitedItems.Count > MaxRecentlyVisitedItems)
{
// We have more than the allowed number of elements; get rid of the least
// recently visited item
RecentlyVisitedItems.RemoveAt(RecentlyVisitedItems.Count - 1);
}
}
// Notify the world that our history has changed
RaisePropertyChanged(HasRecentlyVisitedItemsPropertyName);
}
/// <summary>
/// Sends the GoTo envelope request on the messsenger
/// </summary>
private async void SendGoToEnvelopeRequest(LiteGoToGeometryRequestMessage request)
{
RecentlyVisitedItemsIsVisible = false;
// Allow the UI some breathing time
await TaskEx.Yield();
// Remove the request
RecentlyVisitedItems.Remove(request);
Messenger.Send(request);
}
/// <summary>
/// A result has been selected in the GeoLocator
/// </summary>
void GeoLocatorViewModel_ResultActivated(GeoLocatorViewModel.GeoLocatorResultEventArgs resultArgs)
{
// A result has been found from the GeoLocator; we want to jump to it on the active map
var address = resultArgs.Address;
if (address != null && address.Envelope != null && !double.IsNaN(address.Envelope.CentreLeft.X))
{
var request = new LiteGoToGeometryRequestMessage(resultArgs.Source, address.Envelope, address.Description)
{
DoHighlight = true,
StoreInHistory = true
};
this.Messenger.Send(request);
}
}
/// <summary>
/// Handle an activation request for geometry; actually transforming this into a new Go-To request on the databus
/// </summary>
private void HandleGeometryActivation(object sender, Feature feature, FeatureFieldDescriptor featureFieldDescriptor, IFeatureGeometry geometry)
{
if (geometry != null)
{
var geometryField = featureFieldDescriptor as FeatureGeometryFieldDescriptor;
var envelope = geometry.Envelope;
if (envelope != null && feature != null)
{
var request = new LiteGoToGeometryRequestMessage(sender, new FeatureTargetGeometry(feature, geometryField, geometry))
{
DoHighlight = true,
StoreInHistory = true
};
Messenger.Send(request);
}
}
}
/// <summary>
/// A property of our Properties View Model has changed; ie, driving which records are to be exported/reported
/// </summary>
void Properties_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
if (e.PropertyName == LiteFeatureCollectionResultViewModelProperties.ExportReportElementsModePropertyName ||
e.PropertyName == LiteFeatureCollectionResultViewModelProperties.ExportReportTrackModePropertyName)
{
// The properties that indicate which records are to be exported/reported have changed
SetFeatureCollectionUsageFromHierarchy();
}
else if (e.PropertyName == LiteFeatureCollectionResultViewModelProperties.TrackSelectionInFeatureDetailsPropertyName)
{
// The Track Selection in Details has changed; in case this now is true, immediately send a request
if (Properties.TrackSelectionInFeatureDetails && SelectedFeature != null)
{
// Let's immediately notify the world
this.Messenger.Send(new LiteDisplayFeatureDetailsRequestMessage(this, this.SelectedFeature));
}
}
else if (e.PropertyName == LiteFeatureCollectionResultViewModelProperties.TrackSelectionInMapPropertyName)
{
// The Track Selection in Map has changed; in case this now is true, immediately send a request
if (Properties.TrackSelectionInMap && SelectedFeature != null)
{
// Send a request for jumping to (the envelope of) the selected feature
var envelope = this.SelectedFeature.GetEnvelope();
if (envelope != null)
{
var request = new LiteGoToGeometryRequestMessage(this, envelope, SelectedFeature)
{
DoRocketJump = false
};
this.Messenger.Send(request);
}
}
}
else if (e.PropertyName == LiteFeatureCollectionResultViewModelProperties.HighlightSelectionInMapPropertyName)
{
// The Highlight Selection has changed; in case this now is true, immediately send a request
if (Properties.HighlightSelectionInMap && SelectedFeature != null)
{
this.Messenger.Send(new LiteHighlightGeometryRequestMessage(this, SelectedFeature));
}
}
}
/// <summary>
/// Handles the Go-To envelope request, actually not doing any Go-To action, but just
/// recording this ins our history for resending later upon request
/// </summary>
private void HandleGoToEnvelopeRequest(LiteGoToGeometryRequestMessage request)
{
HandleGoToEnvelopeRequest(request, false);
}