GoogleMapsOverlay¶
Namespace: ThinkGeo.Core
This class represents the GoogleMapsOverlay which requests images from Google's image server by its StaticAPI.
public class GoogleMapsOverlay : WebBasedTileOverlay`1, System.IDisposable
Inheritance Object → Overlay → TileOverlay → WebBasedTileOverlay<GoogleMapsLayer> → GoogleMapsOverlay
Implements IDisposable
Remarks:
This class represents the GoogleMapsOverlay which requests images from Google's image server by its StaticAPI. See http://code.google.com/apis/maps/signup.html for detail.
Properties¶
ClientId¶
This property gets and sets the clientId for the GoogleMapsOverlay.
public string ClientId { get; set; }
Property Value¶
PrivateKey¶
This property gets and sets the privateKey for the GoogleMapsOverlay.
public string PrivateKey { get; set; }
Property Value¶
UriSigningSecret¶
public string UriSigningSecret { get; set; }
Property Value¶
ApiKey¶
public string ApiKey { get; set; }
Property Value¶
MapType¶
Gets or sets the map types available from Google Maps.
public GoogleMapsMapType MapType { get; set; }
Property Value¶
GoogleMapsMapType
TargetProjection¶
public Projection TargetProjection { get; set; }
Property Value¶
Projection
Language¶
public string Language { get; set; }
Property Value¶
WebProxy¶
Gets or sets the Web Proxy for web service.
public IWebProxy WebProxy { get; set; }
Property Value¶
IWebProxy
TimeoutInSeconds¶
Gets or sets the length of time, in seconds, before the request times out.
public int TimeoutInSeconds { get; set; }
Property Value¶
ImageFormat¶
Gets and sets drawing format for the tiles.
public GeoImageFormat ImageFormat { get; set; }
Property Value¶
GeoImageFormat
JpegQuality¶
Gets or sets the image quality when the TileImageFormat is Jpeg; otherwise this property has no effects. Its default value is 80.
public int JpegQuality { get; set; }
Property Value¶
IsCacheOnly¶
Gets or sets a value indicating whether this instance is cache only.
public bool IsCacheOnly { get; set; }
Property Value¶
Boolean
true if this instance is cache only; otherwise, false.
Opacity¶
public double Opacity { get; set; }
Property Value¶
IsVisible¶
Gets or sets if this overlay is visible.
public bool IsVisible { get; set; }
Property Value¶
DrawingQuality¶
public DrawingQuality DrawingQuality { get; set; }
Property Value¶
DrawingQuality
TileSizeMode¶
Gets or sets the tile size mode.
public TileSizeMode TileSizeMode { get; set; }
Property Value¶
TileSizeMode
The tile size mode.
TileResolution¶
Gets or sets the tile resolution.
public TileResolution TileResolution { get; set; }
Property Value¶
TileResolution
The tile resolution.
TileType¶
Gets and sets the overlay is formed by multiple tiles or single tile.
public TileType TileType { get; set; }
Property Value¶
TileWidth¶
Gets and sets the width of the tile.
public int TileWidth { get; set; }
Property Value¶
TileHeight¶
Gets and sets the height of the tile.
public int TileHeight { get; set; }
Property Value¶
TileCache¶
Gets and sets a tile cache object for saving the tiles.
public RasterTileCache TileCache { get; set; }
Property Value¶
RasterTileCache
TileSnappingMode¶
Gets or sets the tileView snapping mode.
public TileSnappingMode TileSnappingMode { get; set; }
Property Value¶
TileSnappingMode
TileBuffer¶
This property gets and sets the number of extra rows and colums of tiles on each side which will surround the minimum grid tiles to cover the map.
public int TileBuffer { get; set; }
Property Value¶
MaxExtent¶
This property gets or sets the max extent of matrix to calculate the tiles.
public RectangleShape MaxExtent { get; set; }
Property Value¶
RectangleShape
Remarks:
By default, MaxExtent is null; the matrix is created depending on the GeographyUnit of current map. When it's DecimalDegree, the matrix' is calculated as (-180, 90, 180, -90) as MaxExtent. While it's not DecimalDegree, the matrix is (-20037508.2314698, 20037508.2314698, 20037508.2314698, -20037508.2314698); It's allowed to modify it to customize the matrix.
WrappingMode¶
Thie property gets or sets whether allow wrap date line.
public WrappingMode WrappingMode { get; set; }
Property Value¶
WrappingMode
WrappingExtent¶
public RectangleShape WrappingExtent { get; set; }
Property Value¶
RectangleShape
CanRefreshRegion¶
public bool CanRefreshRegion { get; protected set; }
Property Value¶
IsBase¶
public bool IsBase { get; set; }
Property Value¶
Name¶
Gets or sets the name of this overaly.
public string Name { get; set; }
Property Value¶
MapArguments¶
Gets or sets current map information which will be used for calculating mechanism.
public MapArguments MapArguments { get; set; }
Property Value¶
MapArguments
OverlayCanvas¶
Gets or sets the actual canvas which maintains all the visual elements on the overlay.
public Canvas OverlayCanvas { get; set; }
Property Value¶
Canvas
DrawingExceptionMode¶
This property gets and sets the DrawingExceptionMode used when an exception occurs during drawing.
public DrawingExceptionMode DrawingExceptionMode { get; set; }
Property Value¶
DrawingExceptionMode
RefreshTypeOnResize¶
public OverlayRefreshType RefreshTypeOnResize { get; set; }
Property Value¶
Attribution¶
public string Attribution { get; set; }
Property Value¶
IsEmpty¶
This property gets if this overlay is empty or not.
public bool IsEmpty { get; }
Property Value¶
Remarks:
This property enhances the performance of the overlay while drawing. If is true, we will skip drawing this overlay and continue drawing the next overlay.
AutoRefreshInterval¶
public TimeSpan AutoRefreshInterval { get; set; }
Property Value¶
Constructors¶
GoogleMapsOverlay()¶
Constructor of GoogleMapsOverlay class.
public GoogleMapsOverlay()
GoogleMapsOverlay(String)¶
Constructor of GoogleMapsOverlay class.
public GoogleMapsOverlay(string apiKey)
Parameters¶
apiKey
String
The clientId for the GoogleMapsOverlay.
Remarks:
This constructor initializes a new layer and assgin a license key.
GoogleMapsOverlay(String, String)¶
Constructor of GoogleMapsOverlay class.
public GoogleMapsOverlay(string apiKey, string uriSigningSecret)
Parameters¶
apiKey
String
The clientId for the GoogleMapsOverlay.
uriSigningSecret
String
The privateKey for the GoogleMapsOverlay.
Remarks:
This constructor initializes a new layer and assgin a license key.
GoogleMapsOverlay(String, String, IWebProxy)¶
public GoogleMapsOverlay(string apiKey, string uriSigningSecret, IWebProxy webProxy)
Parameters¶
apiKey
String
uriSigningSecret
String
webProxy
IWebProxy
Methods¶
DrawAsyncCore(RectangleShape, OverlayRefreshType, CancellationToken)¶
protected Task DrawAsyncCore(RectangleShape targetExtent, OverlayRefreshType overlayRefreshType, CancellationToken cancellationToken)
Parameters¶
targetExtent
RectangleShape
overlayRefreshType
OverlayRefreshType
cancellationToken
CancellationToken
Returns¶
GetTileCore()¶
This method gets a specific tile object to form an overlay.
protected TileView GetTileCore()
Returns¶
TileView
A TileView object to form an overlay.
DrawTileAsyncCore(GeoCanvas, TileView)¶
This method redraws a tile by an extent and geography unit.
protected Task DrawTileAsyncCore(GeoCanvas geoCanvas, TileView tile)
Parameters¶
geoCanvas
GeoCanvas
tile
TileView
A tile which needs to be redrawn.
Returns¶
GetBoundingBoxCore()¶
This method gets an entire bounding box for Google world map extent.
protected RectangleShape GetBoundingBoxCore()
Returns¶
RectangleShape
Returns a RectangleShape indicating the extent of the Google world map.
SaveStateCore()¶
This method saves overlay state to a byte array.
protected Byte[] SaveStateCore()
Returns¶
Byte[]
A byte array indicates current overlay state.
LoadStateCore(Byte[])¶
This method restore the overlay state back from the specified state.
protected void LoadStateCore(Byte[] state)
Parameters¶
state
Byte[]
This parameter indicates the state for restore the overlay.
Events¶
SendingWebRequest¶
public event EventHandler<SendingWebRequestEventArgs> SendingWebRequest;
SentWebRequest¶
public event EventHandler<SentWebRequestEventArgs> SentWebRequest;
SendingHttpRequest¶
public event EventHandler<SendingHttpRequestMessageEventArgs> SendingHttpRequest;
ReceivedHttpResponse¶
public event EventHandler<ReceivedHttpResponseMessageEventArgs> ReceivedHttpResponse;
DrawTilesProgressChanged¶
This event raises when download progress is changed.
public event EventHandler<DrawTilesProgressChangedTileOverlayEventArgs> DrawTilesProgressChanged;
DrawingTile¶
This event raises before the tile is drawing.
public event EventHandler<DrawingTileTileOverlayEventArgs> DrawingTile;
DrawnTile¶
This event raises after the tile is drawn.
public event EventHandler<DrawnTileTileOverlayEventArgs> DrawnTile;
DrawingException¶
public event EventHandler<DrawingExceptionTileOverlayEventArgs> DrawingException;
DrawnException¶
public event EventHandler<DrawnExceptionTileOverlayEventArgs> DrawnException;
TileTypeChanged¶
public event EventHandler<TileTypeChangedTileOverlayEventArgs> TileTypeChanged;
TileTypeChanging¶
public event EventHandler<TileTypeChangingTileOverlayEventArgs> TileTypeChanging;
Drawing¶
This event raises before the overlay is drawing.
public event EventHandler<DrawingOverlayEventArgs> Drawing;
Drawn¶
This event raises after the overlay is drawn.
public event EventHandler<DrawnOverlayEventArgs> Drawn;
DrawingAttribution¶
public event EventHandler<DrawingAttributionOverlayEventArgs> DrawingAttribution;
DrawnAttribution¶
public event EventHandler<DrawnAttributionOverlayEventArgs> DrawnAttribution;
ThrowingException¶
public event EventHandler<ThrowingExceptionOverlayEventArgs> ThrowingException;