public static bool GetGeodesicSizePrecise(this IPrintableMap map, IEnvelope extents, out GeoSize size)
{
size = null;
double width, height;
if (map.Projection.HasTransformation)
{
// the projection supports coordinate tranformation to WGS84
if (CalculateExtentsWidth(map, extents, out width) &&
CalculateExtentsHeight(map, extents, out height))
{
size = new GeoSize(width, height);
return(true);
}
}
if (map.Projection.IsGeographic)
{
// it's WGS84
var center = extents.Center;
width = GeodesicDistance(center.Y, extents.MinX, center.Y, extents.MaxX);
height = GeodesicDistance(extents.MinY, center.X, extents.MaxY, center.X);
size = new GeoSize(width, height);
return(true);
}
return(false);
}
/// <summary>
/// Recursively calculates new extents of the map ot cover a certain geo size in meters.
/// </summary>
private static IEnvelope CalcNewExtentsCore(
IPrintableMap map,
IEnvelope oldExtents,
GeoSize newSize,
SizeF paperSize,
ref int depth)
{
depth++;
GeoSize oldSize;
if (map.GetGeodesicSize(oldExtents, out oldSize))
{
const int maxDepth = 5;
double newScale = CalcMapScale(newSize, paperSize);
double oldScale = CalcMapScale(oldSize, paperSize);
if (NumericHelper.Equal(newScale, oldScale, 1e-6) || depth > maxDepth)
{
return(oldExtents);
}
double ratio = newScale / oldScale - 1;
double dx = oldExtents.Width * ratio;
double dy = oldExtents.Height * ratio;
var extents = oldExtents.Inflate(dx, dy);
return(CalcNewExtentsCore(map, extents, newSize, paperSize, ref depth));
}
return(null);
}
public void Initialize(IPrintableMap map, LayoutControl lc)
{
if (map == null)
{
throw new ArgumentNullException("map");
}
if (lc == null)
{
throw new ArgumentNullException("lc");
}
_layoutControl = lc;
_map = map;
}
public void Initialize(IPrintableMap map, LayoutControl layoutControl)
{
if (map == null)
{
throw new ArgumentNullException("map");
}
if (layoutControl == null)
{
throw new ArgumentNullException("layoutControl");
}
_map = map;
_layoutControl = layoutControl;
_map.TilesLoaded += TilesLoaded;
}
/// <summary>
/// Calculates the size of specified map extents in meters.
/// </summary>
public static bool GetGeodesicSize(this IPrintableMap map, IEnvelope extents, out GeoSize size)
{
bool result = GetGeodesicSizePrecise(map, extents, out size);
if (result)
{
return(true);
}
// we have nothing better but return width and height of the extents in original
// coordinate system; only let's convert them to meters (geodesic size is always in meters)
double width = UnitConversionHelper.Convert(map.MapUnits, LengthUnits.Meters, extents.Width);
double height = UnitConversionHelper.Convert(map.MapUnits, LengthUnits.Meters, extents.Height);
size = new GeoSize(width, height);
return(true);
}
private static bool CalculateExtentsWidth(this IPrintableMap map, IEnvelope extents, out double width)
{
var center = extents.Center;
double lng = extents.MinX;
double lat = center.Y;
double lng2 = extents.MaxX;
double lat2 = center.Y;
width = 0.0;
if (map.Projection.Transform(ref lng, ref lat) && map.Projection.Transform(ref lng2, ref lat2))
{
width = GeodesicDistance(lat, lng, lat2, lng2);
return(true);
}
return(false);
}
private static bool CalculateExtentsHeight(this IPrintableMap map, IEnvelope extents, out double height)
{
var center = extents.Center;
double lng = center.X;
double lat = extents.MinY;
double lng2 = center.X;
double lat2 = extents.MaxY;
height = 0.0;
if (map.Projection.Transform(ref lng, ref lat) && map.Projection.Transform(ref lng2, ref lat2))
{
height = GeodesicDistance(lat, lng, lat2, lng2);
return(true);
}
return(false);
}
public LayoutMenuListener(IAppContext context, ILayoutView view, PdfExportService pdfService)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (view == null)
{
throw new ArgumentNullException("view");
}
if (pdfService == null)
{
throw new ArgumentNullException("pdfService");
}
_context = context;
_view = view;
_pdfService = pdfService;
_map = context.Map;
_layoutControl = view.LayoutControl;
}
public void Initialize(IPrintableMap map, TileLoadingService loadingService)
{
// TODO: assign page settings explicitly
if (map == null)
{
throw new ArgumentNullException("map");
}
if (loadingService == null)
{
throw new ArgumentNullException("loadingService");
}
_map = map;
_loadingService = loadingService;
_loadingService.Initialize(_map, this);
_initialized = true;
ZoomFitToScreen();
UpdateScrollBars();
}
/// <summary>
/// Calculates the size of currently selected map extents in meters
/// </summary>
public static bool GetGeodesicSize(this IPrintableMap map, out GeoSize size)
{
return(GetGeodesicSize(map, map.Extents, out size));
}
/// <summary>
/// Calculates new extents of the map given that they must cover certain geo size in meters.
/// </summary>
/// <param name="map">The map.</param>
/// <param name="oldExtents">The extents.</param>
/// <param name="newSize">The new size.</param>
/// <param name="paperSize"></param>
/// <returns>New extents</returns>
public static IEnvelope CalcNewExtents(IPrintableMap map, IEnvelope oldExtents, GeoSize newSize, SizeF paperSize)
{
int depth = 0;
return(CalcNewExtentsCore(map, oldExtents, newSize, paperSize, ref depth));
}
