/// <summary>
/// Creates an instance of this class
/// </summary>
internal MapViewPortGuard(Size size, double minZoom, double maxZoom)
{
Size = size;
MinimumZoom = minZoom;
MaximumZoom = maxZoom;
PixelAspectRatio = 1d;
}
/// <summary>
/// Returns an url for obtaining a map from WMS.
/// </summary>
/// <param name="locationRect">Extent of the map</param>
/// <param name="actualSize">Size of the map in pixel</param>
/// <param name="layers">List of layers to view</param>
/// <param name="useCache">If set to true, use the current cache</param>
/// <returns>Url to be called</returns>
public virtual string GetMapRequest(Extent locationRect, Size actualSize, IEnumerable<string> layers, bool useCache = true)
{
StringBuilder b = InternalGetMapRequest(actualSize, layers, useCache);
var extentMercatore = ProjectionConversion.ConvertToMercatore(locationRect);
b.Append("&bbox=");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", extentMercatore.MinX));
b.Append(",");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", extentMercatore.MinY));
b.Append(",");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", extentMercatore.MaxX));
b.Append(",");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", extentMercatore.MaxY));
return b.ToString();
}
private StringBuilder InternalGetMapRequest(Size actualSize, IEnumerable<string> layers, bool useCache = true)
{
if (_serviceUrl == "")
throw new Exception("Missing property WMSUrl");
var b = new StringBuilder();
b.Append(_serviceUrl);
b.Append(_serviceUrlContainsQuestionMark ? "&" : "?");
b.Append("request=getmap");
b.Append("&width=");
b.Append(actualSize.Width.ToString());
b.Append("&height=");
b.Append(actualSize.Height.ToString());
b.Append("&");
if ((layers == null) || (layers.Count() == 0))
{
b.Append("layers=");
}
else
{
b.Append("layers=");
foreach (var layer in layers)
{
b.Append(layer);
b.Append(",");
}
b.Remove(b.Length - 1, 1);
}
b.Append("&SRS=EPSG:" + MERCATOR_EPSG);
b.Append("&format=" + IMAGE_FORMAT);
b.Append("&transparent=true");
b.Append("&transparentcolor=0xFFFFFF");
if (!useCache)
//passando i ticks, viene artificialmente modificata la url, quindi
//la cache viene ignorata
b.Append("&" + DateTime.Now.Ticks.ToString());
//NO, c'è un limite di 2047 nell'URL, e per tanti elementi selezionati (> circa 200-300),
//si raggiunge facilmente questo limite
/*
if ((gis.SelectedElements != null) && (gis.SelectedElements.Count > 0))
{
b.Append("&selecteditems=");
for (int i = 0; i < gis.SelectedElements.Count; i++)
{
b.Append((gis.SelectedElements[i].Geometry as SMS.Core.Entities.Geometry).UID);
if (i < (gis.SelectedElements.Count - 1))
b.Append("+");
}
}
*/
return b;
}
/// <summary>
/// Initiates a getfeatureinfo request.
/// </summary>
/// <param name="x">Position x on the screen</param>
/// <param name="y">Position y on the screen</param>
/// <param name="queryLayer">Layer where to do the query</param>
/// <param name="actualSize">Size on the screen</param>
/// <param name="locationRect">extent</param>
public void GetFeatureInfo(int x, int y, Size actualSize, Extent locationRect)
{
if (OnGetFeatureInfoCompleted == null)
throw new Exception("OnGetFeatureInfoCompleted cannot be null");
BusyState = true;
if (_webClient == null)
{
_webClient = new WebClient();
_webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(GetFeatureInfoCompleted);
}
string requesturl = GetFeatureInfoRequest(x, y, actualSize, locationRect);
_webClient.DownloadStringAsync(new Uri(requesturl, UriKind.RelativeOrAbsolute));
}
/// <summary>
/// Returns the url for requesting e getfeatureinfo.
/// </summary>
private string GetFeatureInfoRequest(int x, int y, Size actualSize, Extent locationRect)
{
//ReQuEsT=GetFeatureInfo&WiDtH=100&X=50&Y=50&HeIgHt=100&QuErY_LaYeRs=streets&BbOx=-2,2,2,6&StYlEs=&InFo_fOrMaT=text/gml&SrS=EPSG:4326&LaYeRs=streets
if (_serviceUrl == "")
throw new Exception("Missing property WMSUrl");
if (!ForceWgs84ForFeatureInfo)
locationRect = ProjectionConversion.ConvertToMercatore(locationRect);
var b = new StringBuilder();
b.Append(_serviceUrl);
b.Append(_serviceUrlContainsQuestionMark ? "&" : "?");
b.Append("request=getfeatureinfo");
b.Append("&SRS=EPSG:" + MERCATOR_EPSG);
b.Append("&info_format=application/vnd.ogc.gml&styles=");
b.Append("&query_layers=");
b.Append(_queryLayers);
b.Append("&layers=");
b.Append(_layers);
b.Append("&width=");
b.Append(actualSize.Width);
b.Append("&height=");
b.Append(actualSize.Height);
b.Append("&bbox=");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", locationRect.MinX));
b.Append(",");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", locationRect.MinY));
b.Append(",");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", locationRect.MaxX));
b.Append(",");
b.Append(string.Format(CultureInfo.InvariantCulture, "{0}", locationRect.MaxY));
b.Append("&x=");
b.Append(x);
b.Append("&y=");
b.Append(y);
return b.ToString();
}
public string GetMapRequest(Extent extent, Size actualSize, IEnumerable<string> layers)
{
return wmsService.GetMapRequest(extent, actualSize, layers);
}
public string GetMapRequest(Size actualSize, IEnumerable<string> layers)
{
return wmsService.GetMapRequest(BoundingBox, actualSize, layers);
}
public void GetFeatureInfo(int screenX, int screenY, Size actualSize, Extent locationRect)
{
wmsService.GetFeatureInfo(screenX, screenY, actualSize, locationRect);
}
/// <summary>
/// Initializes a new LabelStyle
/// </summary>
public LabelStyle()
{
_Font = new Font() { FontFamily = "Times New Roman", Size = 12 };
_Offset = new Offset() { X = 0, Y = 0 };
_CollisionDetection = false;
_CollisionBuffer = new Size() { Width = 0, Height = 0 };
_ForeColor = Color.Black;
_HorisontalAlignment = HorizontalAlignmentEnum.Center;
_VerticalAlignment = VerticalAlignmentEnum.Middle;
}
/// <summary>
/// Initializes a new map
/// </summary>
/// <param name="size">Size of map in pixels</param>
public Map(Size size)
{
_mapViewportGuard = new MapViewPortGuard(size, 0d, Double.MaxValue);
this.Layers = new List<SharpMap.Layers.ILayer>();
this.BackColor = Color.White;
}
