/// <summary>
/// Sets the TargetZoomLevel and TargetCenter properties so that the specified bounding box
/// fits into the current view. The TargetHeading property is set to zero.
/// </summary>
public void ZoomToBounds(BoundingBox boundingBox)
{
var rect = MapProjection.BoundingBoxToRect(boundingBox);
var center = new Point(rect.X + rect.Width / 2d, rect.Y + rect.Height / 2d);
var scale = Math.Min(RenderSize.Width / rect.Width, RenderSize.Height / rect.Height);
TargetZoomLevel = ViewTransform.ScaleToZoomLevel(scale);
TargetCenter = MapProjection.MapToLocation(center);
TargetHeading = 0d;
}
/// <summary>
/// Sets the TargetZoomLevel and TargetCenter properties so that the specified bounding box
/// fits into the current viewport. The TargetHeading property is set to zero.
/// </summary>
public void ZoomToBounds(BoundingBox boundingBox)
{
var rect = MapProjection.BoundingBoxToRect(boundingBox);
var center = new Point(rect.X + rect.Width / 2d, rect.Y + rect.Height / 2d);
var scale = Math.Min(RenderSize.Width / rect.Width, RenderSize.Height / rect.Height)
* MapProjection.TrueScale / MapProjection.PixelPerDegree;
TargetZoomLevel = Math.Log(scale, 2d);
TargetCenter = MapProjection.PointToLocation(center);
TargetHeading = 0d;
}
/// <summary>
/// Sets the TargetZoomLevel and TargetCenter properties so that the specified bounding box
/// fits into the current viewport. The TargetHeading property is set to zero.
/// </summary>
public void ZoomToBounds(BoundingBox boundingBox)
{
if (boundingBox != null && boundingBox.HasValidBounds)
{
var rect = MapProjection.BoundingBoxToRect(boundingBox);
var center = new Point(rect.X + rect.Width / 2d, rect.Y + rect.Height / 2d);
var scale0 = 1d / MapProjection.GetViewportScale(0d);
var lonScale = scale0 * RenderSize.Width / rect.Width;
var latScale = scale0 * RenderSize.Height / rect.Height;
var lonZoom = Math.Log(lonScale, 2d);
var latZoom = Math.Log(latScale, 2d);
TargetZoomLevel = Math.Min(lonZoom, latZoom);
TargetCenter = MapProjection.PointToLocation(center);
TargetHeading = 0d;
}
}
private ImageSource GetImage(MapProjection projection, IEnumerable <IMapDrawingItem> items)
{
var scale = ParentMap.ViewTransform.Scale;
var rotation = ParentMap.ViewTransform.Rotation;
var mapRect = projection.BoundingBoxToRect(BoundingBox);
var imageRect = new Rect(0, 0, scale * mapRect.Width, scale * mapRect.Height);
var drawings = new DrawingGroup();
foreach (var item in items)
{
var positions = item.Locations.Select(l => projection.LocationToMap(l)).ToList();
if (positions.Any(p => mapRect.Contains(p)))
{
for (int i = 0; i < positions.Count; i++)
{
positions[i] = new Point(scale * (positions[i].X - mapRect.X),
imageRect.Height - scale * (positions[i].Y - mapRect.Y));
}
drawings.Children.Add(item.GetDrawing(positions, scale, rotation));
}
}
var drawingBrush = new DrawingBrush
{
Drawing = drawings,
ViewboxUnits = BrushMappingMode.Absolute,
Viewbox = imageRect,
};
var drawing = new GeometryDrawing
{
Geometry = new RectangleGeometry(imageRect),
Brush = drawingBrush
};
var image = new DrawingImage(drawing);
image.Freeze();
return(image);
}
