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12.0:apis:thinkgeo.core.layer

ThinkGeo.Core.Layer

Inheritance Hierarchy

Members Summary

Public Constructors

Protected Constructors

Layer()

  • This is the default constructor for the Layer.
Remarks
  • None
Parameters

Public Methods

CloneDeep()

  • N/A
Remarks
  • The difference between deep clone and shallow clone is as follows: In shallow cloning, only the object is copied; the objects within it are not. By contrast, deep cloning copies the cloned object as well as all the objects within.
Return Value
  • Type:Layer
  • Description:A cloned Layer.
Parameters

Open()

  • N/A
Remarks
  • This method is the concrete wrapper for the abstract method OpenCore. The open method plays an important role, as it is responsible for initializing the Layer. Most methods on the Layer will throw an exception if the state of the Layer is not opened. When the map draws each layer, the layer will be opened as one of its first steps; then, after it is finished drawing with that layer, it will close it. In this way, we are sure to release all resources used by the Layer. When implementing the abstract method, consider opening the FeatureSource or RasterSource. You will get a chance to close these in the Close method of the Layer. As this is a concrete public method that wraps a Core method, we reserve the right to add events and other logic to pre- or post-process data returned by the Core version of the method. In this way, we leave our framework open on our end, but also allow you the developer to extend our logic to suit your needs. If you have questions about this, please contact our support team as we would be happy to work with you on extending our framework.
Return Value
  • Type:Void
  • Description:None
Parameters

Close()

  • N/A
Remarks
  • This method is the concrete wrapper for the abstract method CloseCore. The close method plays an important role in the life cycle of the Layer. It may be called after drawing to release any memory and other resources that were allocated since the Open method was called. If you override this method, it is recommended that you take the following things into account: This method may be called multiple times, so we suggest you write the method so that that a call to a closed Layer is ignored and does not generate an error. We also suggest that in the Close you free all resources that have been opened. Remember that the object will not be destroyed, but will be re-opened possibly in the near future. As this is a concrete public method that wraps a Core method, we reserve the right to add events and other logic to pre- or post-process data returned by the Core version of the method. In this way, we leave our framework open on our end, but also allow you the developer to extend our logic to suit your needs. If you have questions about this, please contact our support team as we would be happy to work with you on extending our framework.
Return Value
  • Type:Void
  • Description:None
Parameters

GetBoundingBox()

  • N/A
Remarks
  • This method is the concrete wrapper for the abstract method GetBoundingBoxCore. This method returns the bounding box of the RasterLayer. As this is a concrete public method that wraps a Core method, we reserve the right to add events and other logic to pre- or post-process data returned by the Core version of the method. In this way, we leave our framework open on our end, but also allow you the developer to extend our logic to suit your needs. If you have questions about this, please contact our support team as we would be happy to work with you on extending our framework.
Return Value
  • Description:This method returns the bounding box of the Layer.
Parameters

Draw(GeoCanvas,Collection<SimpleCandidate>)

  • N/A
Remarks
  • This method is the concrete wrapper for the abstract method DrawCore. This method draws the representation of the layer based on the extent you provided. As this is a concrete public method that wraps a Core method, we reserve the right to add events and other logic to pre- or post-process data returned by the Core version of the method. In this way, we leave our framework open on our end, but also allow you the developer to extend our logic to suit your needs. If you have questions about this, please contact our support team as we would be happy to work with you on extending our framework.
Return Value
  • Type:Void
  • Description:None
Parameters
  • canvas
    • Type:GeoCanvas
    • Description:This parameter is the view object or a NativeImage to draw on.
  • labelsInAllLayers
    • Type:Collection<SimpleCandidate>
    • Description:This parameter represents the labels used for collision detection and duplication checking.

RequestDrawing()

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

RequestDrawing(RectangleShape)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

RequestDrawing(IEnumerable<RectangleShape>)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

RequestDrawing(TimeSpan)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • bufferTime
    • Type:TimeSpan
    • Description:N/A

RequestDrawing(TimeSpan,RequestDrawingBufferTimeType)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • bufferTime
    • Type:TimeSpan
    • Description:N/A

RequestDrawing(RectangleShape,TimeSpan)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • bufferTime
    • Type:TimeSpan
    • Description:N/A

RequestDrawing(RectangleShape,TimeSpan,RequestDrawingBufferTimeType)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • bufferTime
    • Type:TimeSpan
    • Description:N/A

RequestDrawing(IEnumerable<RectangleShape>,TimeSpan)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • bufferTime
    • Type:TimeSpan
    • Description:N/A

RequestDrawing(IEnumerable<RectangleShape>,TimeSpan,RequestDrawingBufferTimeType)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • bufferTime
    • Type:TimeSpan
    • Description:N/A

GetType()

  • N/A
Remarks
  • N/A
Return Value
  • Type:Type
  • Description:N/A
Parameters

ToString()

  • N/A
Remarks
  • N/A
Return Value
  • Type:String
  • Description:N/A
Parameters

Equals(Object)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Boolean
  • Description:N/A
Parameters
  • obj
    • Type:Object
    • Description:N/A

GetHashCode()

  • N/A
Remarks
  • N/A
Return Value
  • Type:Int32
  • Description:N/A
Parameters

LoadLayer(Uri)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Layer
  • Description:N/A
Parameters
  • layerUri
    • Type:Uri
    • Description:N/A

LoadLayer(Stream)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Layer
  • Description:N/A
Parameters
  • layerStream
    • Type:Stream
    • Description:N/A

Protected Methods

CloneDeepCore()

  • N/A
Remarks
  • The difference between deep clone and shallow clone is as follows: In shallow cloning, only the object is copied; the objects within it are not. By contrast, deep cloning copies the cloned object as well as all the objects within.
Return Value
  • Type:Layer
  • Description:A cloned Layer.
Parameters

OpenCore()

  • N/A
Remarks
  • This abstract method is called from the concrete public method Open. The open method plays an important role, as it is responsible for initializing the Layer. Most methods on the Layer will throw an exception if the state of the Layer is not opened. When the map draws each layer, the layer will be opened as one of its first steps; then, after it is finished drawing with that layer, it will close it. In this way, we are sure to release all resources used by the Layer. When implementing the abstract method, consider opening the FeatureSource or RasterSource. You will get a chance to close these in the Close method of the Layer.
Return Value
  • Type:Void
  • Description:None
Parameters

CloseCore()

  • N/A
Remarks
  • This abstract method is called from the concrete public method Close. The close method plays an important role in the life cycle of the Layer. It may be called after drawing to release any memory and other resources that were allocated since the Open method was called. If you override this method, it is recommended that you take the following things into account: This method may be called multiple times, so we suggest you write the method so that that a call to a closed Layer is ignored and does not generate an error. We also suggest that in the Close you free all resources that have been opened. Remember that the object will not be destroyed, but will be re-opened possibly in the near future.
Return Value
  • Type:Void
  • Description:None
Parameters

GetBoundingBoxCore()

  • N/A
Remarks
  • This method returns the bounding box of the Layer.
Return Value
  • Description:This method returns the bounding box of the Layer.
Parameters

DrawException(GeoCanvas,Exception)

  • N/A
Remarks
  • This method can be overriden its logic by rewrite the DrawExceptionCore.
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • canvas
    • Type:GeoCanvas
    • Description:The target view to draw the layer.
  • e
    • Type:Exception
    • Description:The exception thrown when layer.Draw().

DrawExceptionCore(GeoCanvas,Exception)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • canvas
    • Type:GeoCanvas
    • Description:The target view to draw the layer.
  • e
    • Type:Exception
    • Description:The exception thrown when layer.Draw().

OnDrawingException(DrawingExceptionLayerEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

OnDrawnException(DrawnExceptionLayerEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

DrawCore(GeoCanvas,Collection<SimpleCandidate>)

  • N/A
Remarks
  • This method is the concrete wrapper for the abstract method DrawCore. This method draws the representation of the layer based on the extent you provided. When implementing this abstract method, consider each feature and its column data values. You can use the full power of the GeoCanvas to do the drawing. If you need column data for a feature, be sure to override the GetRequiredColumnNamesCore and add the columns you need to the collection. In many of the styles, we add properties that allow the user to specify which field they need; then, in the GetRequiredColumnNamesCore, we read that property and add it to the collection.
Return Value
  • Type:Void
  • Description:None
Parameters
  • canvas
    • Type:GeoCanvas
    • Description:This parameter is the view object or a NativeImage to draw on.
  • labelsInAllLayers
    • Type:Collection<SimpleCandidate>
    • Description:This parameter represents the labels used for collision detection and duplication checking.

DrawAttributionCore(GeoCanvas,String)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters
  • attribution
    • Type:String
    • Description:N/A

OnDrawingAttribution(DrawingAttributionLayerEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

OnDrawnAttribution(DrawnAttributionLayerEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

OnDrawingProgressChanged(DrawingProgressChangedEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

OnRequestedDrawing(RequestedDrawingLayerEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

OnRequestingDrawing(RequestingDrawingLayerEventArgs)

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

MemberwiseClone()

  • N/A
Remarks
  • N/A
Return Value
  • Type:Object
  • Description:N/A
Parameters

Finalize()

  • N/A
Remarks
  • N/A
Return Value
  • Type:Void
  • Description:N/A
Parameters

Public Properties

IsOpen

  • N/A
Remarks
  • This method is the concrete wrapper for the abstract method IsOpenCore. Various methods on the Layer require that it be in an open state. If one of those methods is called when the state is not open, then the method will throw an exception. To enter the open state, you must call the Layer Open method. The method will raise an exception if the current Layer is already open. As this is a concrete public method that wraps a Core method, we reserve the right to add events and other logic to pre- or post-process data returned by the Core version of the method. In this way, we leave our framework open on our end, but also allow you the developer to extend our logic to suit your needs. If you have questions about this, please contact our support team as we would be happy to work with you on extending our framework.
Return Value
  • Type:Boolean

HasBoundingBox

  • N/A
Remarks
  • The default value is false.
Return Value
  • Type:Boolean

DrawingTime

  • N/A
Remarks
  • We track the drawing time for the layer and report it back in this method. This is useful for determining the speed of various layers.
Return Value
  • Type:TimeSpan

Name

  • N/A
Remarks
  • The name is user defined. It is useful to set, as it may be used for higher level components such as legends, etc.
Return Value
  • Type:String

Attribution

  • N/A
Remarks
  • N/A
Return Value
  • Type:String

IsVisible

  • N/A
Remarks
  • If this property is set to false, the layer will not draw. We ensure this in the Draw method. This is useful for legends and other controls that control the visibility of layers.
Return Value
  • Type:Boolean

Transparency

  • N/A
Remarks
  • None
Return Value
  • Type:Single

BlueTranslation

  • N/A
Remarks
  • None
Return Value
  • Type:Single

RedTranslation

  • N/A
Remarks
  • None
Return Value
  • Type:Single

GreenTranslation

  • N/A
Remarks
  • None
Return Value
  • Type:Single

KeyColors

  • N/A
Remarks
  • It will make these colors transparent when draw image.
Return Value

IsNegative

  • N/A
Remarks
  • None
Return Value
  • Type:Boolean

IsGrayscale

  • N/A
Remarks
  • None
Return Value
  • Type:Boolean

ColorMappings

  • N/A
Remarks
  • N/A
Return Value

DrawingExceptionMode

  • N/A
Remarks
  • N/A
Return Value

ThreadSafe

  • N/A
Remarks
  • N/A
Return Value

Projection

  • N/A
Remarks
  • N/A
Return Value

RequestDrawingInterval

  • N/A
Remarks
  • N/A
Return Value
  • Type:TimeSpan

Protected Properties

IsOpenCore

  • N/A
Remarks
  • Various methods on the Layer require that it be in an open state. If one of those methods is called when the state is not open, then the method will throw an exception. To enter the open state, you must call the Layer Open method. The method will raise an exception if the current Layer is already open.
Return Value
  • Type:Boolean

Public Events

DrawingProgressChanged

  • N/A
Remarks
  • N/A

Event Arguments:DrawingProgressChangedEventArgs

DrawingException

  • N/A
Remarks
  • N/A

Event Arguments:DrawingExceptionLayerEventArgs

DrawnException

  • N/A
Remarks
  • N/A

Event Arguments:DrawnExceptionLayerEventArgs

DrawingAttribution

  • N/A
Remarks
  • N/A

Event Arguments:DrawingAttributionLayerEventArgs

DrawnAttribution

  • N/A
Remarks
  • N/A

Event Arguments:DrawnAttributionLayerEventArgs

RequestedDrawing

  • N/A
Remarks
  • N/A

Event Arguments:RequestedDrawingLayerEventArgs

RequestingDrawing

  • N/A
Remarks
  • N/A

Event Arguments:RequestingDrawingLayerEventArgs

12.0/apis/thinkgeo.core.layer.txt · Last modified: 2019/09/26 09:35 (external edit)