/// <summary>
/// Returns a list of spatial relationships between two geometries
/// </summary>
/// <param name="a">The 'a' in "a contains b"</param>
/// <param name="b">The 'b' in "a contains b"</param>
/// <returns>A list of spatial relationships that are true for a and b.</returns>
private static List <SpatialRelationship> GetSpatialRelationships(Geometry a, Geometry b)
{
List <SpatialRelationship> relationships = new List <SpatialRelationship>();
if (GeometryEngine.Crosses(a, b))
{
relationships.Add(SpatialRelationship.Crosses);
}
if (GeometryEngine.Contains(a, b))
{
relationships.Add(SpatialRelationship.Contains);
}
if (GeometryEngine.Disjoint(a, b))
{
relationships.Add(SpatialRelationship.Disjoint);
}
if (GeometryEngine.Intersects(a, b))
{
relationships.Add(SpatialRelationship.Intersects);
}
if (GeometryEngine.Overlaps(a, b))
{
relationships.Add(SpatialRelationship.Overlaps);
}
if (GeometryEngine.Touches(a, b))
{
relationships.Add(SpatialRelationship.Touches);
}
if (GeometryEngine.Within(a, b))
{
relationships.Add(SpatialRelationship.Within);
}
return(relationships);
}
// Accepts two user shapes and adds them to the graphics layer
private async Task AcceptShapeAsync()
{
// Shape One
Geometry shapeOne = await mapView.Editor.RequestShapeAsync(
(DrawShape)comboShapeOne.SelectedValue, _symbols[comboShapeOne.SelectedIndex]);
_graphicsLayer.Graphics.Add(new Graphic(shapeOne, _symbols[comboShapeOne.SelectedIndex]));
// Shape Two
Geometry shapeTwo = await mapView.Editor.RequestShapeAsync(
(DrawShape)comboShapeTwo.SelectedValue, _symbols[comboShapeTwo.SelectedIndex]);
_graphicsLayer.Graphics.Add(new Graphic(shapeTwo, _symbols[comboShapeTwo.SelectedIndex]));
var relations = new List <Tuple <string, bool> >();
relations.Add(new Tuple <string, bool>("Contains", GeometryEngine.Contains(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Crosses", GeometryEngine.Crosses(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Disjoint", GeometryEngine.Disjoint(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Equals", GeometryEngine.Equals(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Intersects", GeometryEngine.Intersects(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Overlaps", GeometryEngine.Overlaps(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Touches", GeometryEngine.Touches(shapeOne, shapeTwo)));
relations.Add(new Tuple <string, bool>("Within", GeometryEngine.Within(shapeOne, shapeTwo)));
resultsListView.ItemsSource = relations;
resultsPanel.Visibility = Visibility.Visible;
}
// Accepts two user shapes and adds them to the graphics layer
private async Task AcceptShapeAsync()
{
// Shape One
DrawShape drawShape1 = (DrawShape)comboShapeOne.SelectedItem;
Geometry shapeOne = null;
if (drawShape1 == DrawShape.Point)
{
shapeOne = await mapView.Editor.RequestPointAsync();
}
else
{
shapeOne = await mapView.Editor.RequestShapeAsync(drawShape1, _symbols[comboShapeOne.SelectedIndex]);
}
graphicsLayer.Graphics.Add(new Graphic(shapeOne, _symbols[comboShapeOne.SelectedIndex]));
// Shape Two
Geometry shapeTwo = await mapView.Editor.RequestShapeAsync(
(DrawShape)comboShapeTwo.SelectedItem, _symbols[comboShapeTwo.SelectedIndex]);
graphicsLayer.Graphics.Add(new Graphic(shapeTwo, _symbols[comboShapeTwo.SelectedIndex]));
Dictionary <string, bool> relations = new Dictionary <string, bool>();
relations["Contains"] = GeometryEngine.Contains(shapeOne, shapeTwo);
relations["Crosses"] = GeometryEngine.Crosses(shapeOne, shapeTwo);
relations["Disjoint"] = GeometryEngine.Disjoint(shapeOne, shapeTwo);
relations["Equals"] = GeometryEngine.Equals(shapeOne, shapeTwo);
relations["Intersects"] = GeometryEngine.Intersects(shapeOne, shapeTwo);
relations["Overlaps"] = GeometryEngine.Overlaps(shapeOne, shapeTwo);
relations["Touches"] = GeometryEngine.Touches(shapeOne, shapeTwo);
relations["Within"] = GeometryEngine.Within(shapeOne, shapeTwo);
resultsPanel.Visibility = Visibility.Visible;
resultsListView.ItemsSource = relations;
}