/// <summary>
/// Navigate to show all geometries once the mapview has been initialised
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void VMMapView_ViewportInitialized(object sender, EventArgs e)
{
var shapeLayers = MapModel.CreateShapes();
ILayer allShapesLayer;
shapeLayers.TryGetValue("all", out allShapesLayer);
if (allShapesLayer != null)
{
VMMapView.Navigator.NavigateTo(allShapesLayer.Envelope, Mapsui.Utilities.ScaleMethod.Fit);
}
else
{
Mapsui.Geometries.Point LL = new Mapsui.Geometries.Point(Convert.ToDouble(5.84), 45.86);
var sphericalMercatorCoordinateLL = SphericalMercator.FromLonLat(LL.X, LL.Y);
Mapsui.Geometries.Point UR = new Mapsui.Geometries.Point(Convert.ToDouble(10.56), 47.83);
var sphericalMercatorCoordinateUR = SphericalMercator.FromLonLat(UR.X, UR.Y);
VMMapView.Navigator.NavigateTo(new BoundingBox(sphericalMercatorCoordinateLL, sphericalMercatorCoordinateUR), Mapsui.Utilities.ScaleMethod.Fit);
}
}
/// <summary>
/// Replage the geometries, but do not change the map position
/// </summary>
public void NewShapes()
{
foreach (var layer in Map.Layers)
{
if (layer.Name == "Polygons" || layer.Name == "Lines" || layer.Name == "Points" || layer.Name == "PolygonsNoRecords" || layer.Name == "LinesNoRecords" || layer.Name == "PointsNoRecords")
{
Map.Layers.Remove(layer);
}
}
var shapeLayers = MapModel.CreateShapes();
if (shapeLayers != null && shapeLayers.Count > 0)
{
ILayer polylayer;
ILayer linelayer;
ILayer pointlayer;
ILayer polylayerNoRecords;
ILayer linelayerNoRecords;
ILayer pointlayerNoRecords;
ILayer allShapesLayer;
shapeLayers.TryGetValue("polygons", out polylayer);
shapeLayers.TryGetValue("lines", out linelayer);
shapeLayers.TryGetValue("points", out pointlayer);
shapeLayers.TryGetValue("polygonsNoRecords", out polylayerNoRecords);
shapeLayers.TryGetValue("linesNoRecords", out linelayerNoRecords);
shapeLayers.TryGetValue("pointsNoRecords", out pointlayerNoRecords);
shapeLayers.TryGetValue("all", out allShapesLayer);
Map.Layers.Insert(Map.Layers.Count, polylayer);
Map.Layers.Insert(Map.Layers.Count, linelayer);
Map.Layers.Insert(Map.Layers.Count, pointlayer);
Map.Layers.Insert(Map.Layers.Count, polylayerNoRecords);
Map.Layers.Insert(Map.Layers.Count, linelayerNoRecords);
Map.Layers.Insert(Map.Layers.Count, pointlayerNoRecords);
if (allShapesLayer != null)
{
VMMapView.Navigator.NavigateTo(allShapesLayer.Envelope, Mapsui.Utilities.ScaleMethod.Fit);
}
}
}
/// <summary>
/// Remove and replace the geometries
/// </summary>
public void RefreshShapes()
{
foreach (var layer in Map.Layers)
{
if (layer.Name == "Polygons" || layer.Name == "Lines" || layer.Name == "Points")
{
Device.BeginInvokeOnMainThread(() =>
{
Map.Layers.Remove(layer);
});
}
}
var shapeLayers = MapModel.CreateShapes();
if (shapeLayers != null && shapeLayers.Count > 0)
{
ILayer polylayer;
ILayer linelayer;
ILayer pointlayer;
ILayer polylayerNoRecords;
ILayer linelayerNoRecords;
ILayer pointlayerNoRecords;
ILayer allShapesLayer;
shapeLayers.TryGetValue("polygons", out polylayer);
shapeLayers.TryGetValue("lines", out linelayer);
shapeLayers.TryGetValue("points", out pointlayer);
shapeLayers.TryGetValue("polygonsNoRecords", out polylayerNoRecords);
shapeLayers.TryGetValue("linesNoRecords", out linelayerNoRecords);
shapeLayers.TryGetValue("pointsNoRecords", out pointlayerNoRecords);
shapeLayers.TryGetValue("all", out allShapesLayer);
Device.BeginInvokeOnMainThread(() =>
{
Map.Layers.Insert(Map.Layers.Count, polylayer);
Map.Layers.Insert(Map.Layers.Count, linelayer);
Map.Layers.Insert(Map.Layers.Count, pointlayer);
Map.Layers.Insert(Map.Layers.Count, polylayerNoRecords);
Map.Layers.Insert(Map.Layers.Count, linelayerNoRecords);
Map.Layers.Insert(Map.Layers.Count, pointlayerNoRecords);
});
}
var filterGeom = Preferences.Get("FilterGeometry", String.Empty);
if (filterGeom != String.Empty)
{
int geomId;
int.TryParse(filterGeom, out geomId);
if (geomId != 0)
{
try
{
Device.BeginInvokeOnMainThread(() =>
{
var centre = MapModel.GetCentreOfGeometry(geomId);
VMMapView.Navigator.NavigateTo(centre, VMMapView.Viewport.Resolution);
});
}
catch
{
}
}
Preferences.Set("FilterGeometry", String.Empty); //Only centre once. After this, forget the filter, and don't keep returning to this position
}
else
{
ReCentreMap();
}
}
