FeatureSourceMarkerOverlay¶

Namespace: ThinkGeo.Core

Represents a MarkerOverlay that dynamically creates markers from the feature source specified.

public class FeatureSourceMarkerOverlay : MarkerOverlay, System.IDisposable

Inheritance Object → Overlay → MarkerOverlay → FeatureSourceMarkerOverlay
Implements IDisposable

Remarks:

The FeatureSourceMarkerOverlay generates markers from the features retrieved from its FeatureSource. Thus, you need to set the FeatureSource property before the marker overlay can create the markers. The ZoomLevelSet property is an entrance for you to define the marker styles on zoomlevels.

Properties¶

FeatureSource¶

Gets or sets a feature source object that provides the features from which the markers are created.

public FeatureSource FeatureSource { get; set; }

Property Value¶

FeatureSource

        A feature source object that provides the features from which the markers are
        created.

ZoomLevelSet¶

Gets the ZoomLevelSet object that controls the markers' generation.

public MarkerZoomLevelSet ZoomLevelSet { get; }

Property Value¶

MarkerZoomLevelSet
A ZoomLevelSet object that controls the markers' generation.

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¶

Boolean

IsBase¶

public bool IsBase { get; set; }

Property Value¶

Boolean

Name¶

Gets or sets the name of this overaly.

public string Name { get; set; }

Property Value¶

String

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

IsVisible¶

Gets or sets if this overlay is visible.

public bool IsVisible { get; set; }

Property Value¶

Boolean

RefreshTypeOnResize¶

public OverlayRefreshType RefreshTypeOnResize { get; set; }

Property Value¶

OverlayRefreshType

Attribution¶

public string Attribution { get; set; }

Property Value¶

String

IsEmpty¶

This property gets if this overlay is empty or not.

public bool IsEmpty { get; }

Property Value¶

Boolean

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¶

TimeSpan

Constructors¶

FeatureSourceMarkerOverlay()¶

Initialize an instance of the FeatureSourceMarkerOverlay class.

public FeatureSourceMarkerOverlay()

FeatureSourceMarkerOverlay(FeatureSource)¶

Initialize an instance of the FeatureSourceMarkerOverlay class.

public FeatureSourceMarkerOverlay(FeatureSource featureSource)

Parameters¶

featureSource FeatureSource

        The feature source object that provides the features from which the markers are
        created.

Methods¶

DrawCore(RectangleShape, OverlayRefreshType)¶

This method draws markers by the passed parameters.

protected void DrawCore(RectangleShape targetExtent, OverlayRefreshType overlayRefreshType)

Parameters¶

targetExtent RectangleShape
A world extent that to query features that for creating markers.

overlayRefreshType OverlayRefreshType
This parameter indicates whether needs to redraw this overlay.

Remarks:

When overriding this method; consider dispose the old image source in the existing markers; or else some image source cannot be recycled.

GetMarkersForDrawingCore(RectangleShape)¶

Returns a collection of markers based on the extent and zoomlevel that you passed in.

protected GeoCollection<Marker> GetMarkersForDrawingCore(RectangleShape boundingBox)

Parameters¶

boundingBox RectangleShape
The extent that includes the markers you want to serialize.

Returns¶

GeoCollection<Marker>
A collection of marker objects that will be placed on the map.

GetBoundingBoxCore()¶

This method gets a bounding box that maintains all the features which are added in this overlay.

protected RectangleShape GetBoundingBoxCore()

Returns¶

RectangleShape
Returns a RectangleShape that maintains all the features which are added in this overlay.

OnMarkerMouseDown(MouseButtonEventArgs)¶

protected void OnMarkerMouseDown(MouseButtonEventArgs e)

Parameters¶

e MouseButtonEventArgs

OnMarkerMouseUp(MouseButtonEventArgs)¶

protected void OnMarkerMouseUp(MouseButtonEventArgs e)

Parameters¶

e MouseButtonEventArgs

OnMarkerMouseClick(MouseButtonEventArgs)¶

protected void OnMarkerMouseClick(MouseButtonEventArgs e)

Parameters¶

e MouseButtonEventArgs

OnMarkerMouseMove(MouseEventArgs)¶

protected void OnMarkerMouseMove(MouseEventArgs e)

Parameters¶

e MouseEventArgs

Events¶

MarkerMouseDown¶

public event MouseButtonEventHandler MarkerMouseDown;

MarkerMouseUp¶

public event MouseButtonEventHandler MarkerMouseUp;

MarkerMouseClick¶

public event MouseButtonEventHandler MarkerMouseClick;

MarkerMouseMove¶

public event MouseEventHandler MarkerMouseMove;

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;