It looks as though the last layer added to the Maps operational layers will constrain the MapViews viewport. Is this a bug or working as intended?
If it is working as intended, how would you then set the extent of your viewport programmatically?
I've added a bit of code to show what I mean:
Similar questions have been asked here and here, however, neither of those questions have any answers.
Attached is some code to show what I mean
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
spatialReference = new SpatialReference(3395);
smallEnvelope = new Envelope(-500, -500, 500, 500, spatialReference);
centerEnvelope = new Envelope(-1, -1, 1, 1, spatialReference);
largeEnvelope = new Envelope(-1000, -1000, 1000, 1000, spatialReference);
Loaded += MainWindow_Loaded;
}
private readonly SpatialReference spatialReference;
private readonly Envelope centerEnvelope;
private readonly Envelope smallEnvelope;
private readonly Envelope largeEnvelope;
private async void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
var leftFirst = await CreateLayer("large", largeEnvelope, SimpleMarkerSymbolStyle.Circle, Colors.Maroon);
var leftCenter = await CreateLayer("center", centerEnvelope, SimpleMarkerSymbolStyle.X, Colors.BlueViolet);
var leftLast = await CreateLayer("small", smallEnvelope, SimpleMarkerSymbolStyle.Cross, Colors.HotPink);
InitializeMapView(mv_LeftMap, new List<Layer>() { leftFirst, leftCenter, leftLast });
var rightFirst = leftLast.Clone();
var rightCenter = leftCenter.Clone();
var rightLast = leftFirst.Clone();
InitializeMapView(mv_RightMap, new List<Layer>() { rightFirst, rightCenter, rightLast });
}
private void InitializeMapView(MapView view, List<Layer> layers)
{
var map = new Map()
{
Basemap = new Basemap(),
MinScale = 5000000,
MaxScale = 0
};
foreach (var layer in layers)
{
map.OperationalLayers.Add(layer);
}
view.Map = map;
}
private async Task<Layer> CreateLayer(string layerName, Envelope envelope, SimpleMarkerSymbolStyle style, Color color)
{
var fields = new List<Field>();
var featureCollectionTable = new FeatureCollectionTable(fields, GeometryType.Point, envelope.SpatialReference)
{
Renderer = new SimpleRenderer(new SimpleMarkerSymbol(style, color, 50))
};
var topLeft = featureCollectionTable.CreateFeature();
var topRight = featureCollectionTable.CreateFeature();
var bottomLeft = featureCollectionTable.CreateFeature();
var bottomRight = featureCollectionTable.CreateFeature();
topLeft.Geometry = new MapPoint(envelope.XMin, envelope.YMax, spatialReference);
topRight.Geometry = new MapPoint(envelope.XMax, envelope.YMax, spatialReference);
bottomLeft.Geometry = new MapPoint(envelope.XMin, envelope.YMin, spatialReference);
bottomRight.Geometry = new MapPoint(envelope.XMax, envelope.YMin, spatialReference);
await featureCollectionTable.AddFeaturesAsync(new[] { topLeft, topRight, bottomLeft, bottomRight });
var featureCollection = new FeatureCollection(new[] { featureCollectionTable });
var featureCollectionLayer = new FeatureCollectionLayer(featureCollection);
return featureCollectionLayer;
}
}
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<esri:MapView x:Name="mv_LeftMap"
Grid.Column="0" />
<esri:MapView x:Name="mv_RightMap"
Grid.Column="1" />
<TextBlock Text="Larger viewport"
Grid.Row="1" />
<TextBlock Text="Smaller viewport"
Grid.Row="1"
Grid.Column="1" />
</Grid>
